STRUCTURAL HOLLOW SECTIONS
Celsius®

Celsius is our range of fully normalized hot finished hollow sections to EN 10210.

Celsius is the ultimate hot finished structural hollow section. Designed to perform in the most arduous conditions, the Celsius range have outstanding properties thanks to their fully normalized steel.

Celsius is available in a range of grades, including the popular S355NH and weight-saving high strength S460NH as well as in weathering grade steel for the ultimate durability in long-life, low-maintenance structures. The size range available for Celsius is one of the broadest on the market

Our team of technical experts are always on hand to help you get the most out of Celsius. Contact us to find out how we can help you.

Celsius Tube made in Corby by Tata Steel
Tower crane
Celsius under production at Tata Steel
Tubes for trailer axles
Product specification
Celsius is currently available in the following grades

EN-ConstructionEngineering-Product-Tubes-Celsius-S355NH

S355NH
Specification details for S355NH

EN-ConstructionEngineering-Product-Tubes-Celsius-S355NH Key features

Key features
  • Fully normalized structural hollow sections, compliant with EN 10210:S355NH
  • Normalized fine grain steel, so free of internal stresses and with a minimum strength of 355N/mm2 allowing the highest fabrication factors and enabling material cost savings and lighter structures
  • Supplied normalized and compliant to both ‘NH’ and ‘J2H’ classifications
  • Available in a wide size range of square (40 x 40 x 3.2mm to 400 x 400 x 16mm) rectangular (50 x 30 x 3.2mm to 500 x 300 x 16mm), elliptical (300 x 150 x 8mm to 500 x 250 x 16mm) and circular (42.4 x 3.2mm to 508 x 16mm) hollow sections
  • Tight corner radii (<2T) exceeding the standard - enhancing the product’s aesthetic appeal whilst avoiding the risk of brittle fracture which occurs in some cold formed products
  • Excellent dimensional consistency, high levels of formability, suitable for galvanising and, because the steel is fully-killed, excellent weldability
  • Fully compliant with CE marking and certified as suitable for all structural applications; overcomes design risks associated with other forms of hollow sections
  • Certified as suitable for mechanical applications, especially those involving cyclical loading
  • Suitable for low temperature applications (40J @ -20°C)
  • Batch-tested to give the properties of the specific delivered material; full test certification supplied
  • Clearly marked as Celsius® S355NH, and supplied with a 3.1 test certificate for the reassurance of batch traceability
  • Full technical support available
  • Excellent supply availability through approved stockholders

EN-ConstructionEngineering-Product-Tubes-Celsius-S355NH Properties

Properties

High strength hot finished hollow sections suitable for all construction and mechanical applications. Celsius® 355 is suitable for all internal and external applications to BS5950-1:2000, EN1993 and BS5400.

Mechanical properties

Celsius® 355 hollow sections are supplied with a minimum yield strength of 355 N/mm2 and comply fully with the European Standard for hot finished structural hollow sections, EN10210:S355NH.

Yield strength;
ReHmin N/mm2;
Tensile strength;
RmN/mm2
Elongation % min
L0;= 5,65 √S0
specimen
Impact strength
10mm x 10mm
Carbon equivalent
(CEV) max
T ≤ 16mm 3mm < T ≤ 100mm T ºC J  
355 470-630 22 -20 40 0.43

Chemical composition % by mass

C max 0.2
Si max 0.5
Mn 0.9 - 1.65
P max 0.035
S max 0.03
Nb max 0.05
V ma 0.12
Al total min 0.02
Ti max 0.03
Cr max 0.3
Ni max 0.5
Mo max 0.1
Cu max 0.35
N max 0.02

Celsius® 355 is produced from fully-killed steel – critical to formability and weldability.

Inspection and testing

Celsius® hollow sections EN10210:S355NH are subject to specific inspection and testing and are supplied with an inspection certificate type 3.1 to EN10204.

EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Tolerances

Tolerances

Dimensional tolerances EN10210: Part 2

Celsius grades are manufactured to the tolerances defined in EN 10210: Part 2. Tighter tolerances are available on request and if you require specific tolerances in excess of this, please contact us.

  Circular/Ellipticals Square/Rectangular
Outside dimension
(D B and H)
Circular ±1% with a min of ±0.5mm and maximum of ±10mm.
Ellipticals ±1% with a min of ±0.5mm (The permitted tolerance is twice the value for H<250)
±1% with a min of ±0.5mm
Thickness (T) -10%
Note: Positive deviation limited by mass tolerance
-10%
Note: Positive deviation limited by mass tolerance
Squareness of side - 90 degrees ±1 degree
External corner profile - 2T max at each corner*
(EN10210 has 3T max)
Concavity/convexity (x) - – ±1% of the side, measured independently
of the tolerance on the outside dimension
Twist (V) Ellipticals: 2mm plus 0.5mm/m max
(The permitted tolerance is twice the value for H<250)
2mm plus 0.5mm/m max.
Section is placed on a flat surface with one end held flat. At the other end the height difference of the two lower corners is taken
Mass (M) ±6% on individual lengths ±6% on individual lengths
Straightness Maximum 0.2% of the total length & 3mm over every 1m length. 
Ellipticals: The permitted tolerance is twice the value for H<250
Maximum 0.2% of total length & 3mm over every
1m length
Length +150mm/-0mm +150mm/-0mm
Out-of-roundness (O) Circular 2% for hollow sections having a diameter to thickness ratio not exceeding 100 -

* Unless shown otherwise

EN-ConstructionEngineering-Product-Tubes-Celsius-S355NH Dimensions

Dimensions

Celsius 355 is available across the size range indicated in the tables, minimum order quantities may apply. Intermediate sizes may also be available. For further information or specific requests, please contact us.

Celsius 355 is available in standard lengths from 6.0m to 14.5m for sizes up to 100/100 or 120/80 and up to 15.3m for all other sizes.

Circular hollow sections (CHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16 17.5
42.4                    
48.3                    
60.3                    
76.1                    
88.9                    
114.3                    
139.7                    
168.3                    
193.7                    
219.1                    
244.5                    
273.0                    
323.9                    
355.6                    
406.4                    
457.0                    
508.0                    

 

Square hollow sections (SHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16 17.5
40/40                    
50/50                    
60/60                    
70/70                    
80/80                    
90/90                    
100/100                    
120/120                    
140/140                    
150/150                    
160/160                    
180/180                    
200/200                    
250/250                    
300/300                    
350/350                    
400/400                    

 

Rectangular hollow sections (RHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16 17.5
50/30                    
60/40                    
80/40                    
90/50                    
100/50                    
100/60                    
120/60                    
120/80                    
150/100                    
160/80                    
200/100                    
200/120                    
200/150                    
250/100                    
250/150                    
300/100                    
300/200                    
350/150                    
350/250                    
400/200                    
400/300                    
450/250                    
500/200                    
500/300                    

 

Elliptical hollow sections (EHS)   
mm 8 10 12.5 16
300/150        
400/200        
500/250        

EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Design support

Free design support

Our team of dedicated engineers are on-hand to support engineers to make the most of our range of Celsius fully normalized hollow sections.
Email us on technicalmarketing@tatasteeleurope.com or phone on +44 (0)1536 404561 to speak to the team.

We also provide a number of free tools to make your specification of Celsius hollow sections as simple as possible:

  • Celsius design app - for quick and easy sizing of hollow sections (iOS and Android)
  • The Blue Book – the definitive guide to designing across our full range
  • Welded Joints calculation software
  • Firesoft for designing concrete-filled, fire-resistant columns
  • BIM Objects – available to download from our innovative BIM DNA Profiler

 

EN-ConstructionEngineering-Product-Tubes-Celsius-S420NH

S420NH
Specification details for S420NH

EN-ConstructionEngineering-Product-Tubes-Celsius-S420NH Key features

Key features
  • Fully normalized structural hollow sections, compliant with EN 10210:S420NH
  • High strength steel enabling up to 17% weight saving in certain applications
  • Normalized fine grain steel, so free of internal stresses and with a minimum strength of 420N/mm2 allowing the highest fabrication factors and enabling material cost savings and lighter structures
  • Available in a wide size range of circular (42.4 x 3.2mm to 5.8 x 16mm) square (40 x 40 x 3.2mm to 400 x 400 x 16mm) rectangular (50 x 30 x 3.2mm to 500 x 300 x 16mm) hollow sections
  • Tight corner radii (<2T) exceeding the standard - enhancing the product’s aesthetic appeal whilst avoiding the risk of brittle fracture which occurs in some cold formed products
  • Excellent dimensional consistency, high levels of formability, suitable for galvanising and, because the steel is fully-killed, excellent weldability
  • Fully compliant with CE marking and certified as suitable for all structural applications; overcomes design risks associated with other forms of hollow sections
  • Certified as suitable for mechanical applications, especially those involving cyclical loading
  • Suitable for low temperature applications (40J @ -20°C)
  • Batch-tested to give the properties of the specific delivered material; full test certification supplied
  • Clearly marked as Celsius® S420NH, and supplied with a 3.1 test certificate for the reassurance of batch traceability
  • Full technical support available

EN-ConstructionEngineering-Product-Tubes-Celsius-S420NH Properties

Properties

High strength hot finished hollow sections suitable for all construction and mechanical applications. Celsius® 420 is suitable for all internal and external applications to BS5950-1:2000, EN1993 and BS5400.

Mechanical properties

Celsius 420 hollow sections are supplied with a minimum yield strength of 420 N/mm2 and comply fully with the European Standard for hot finished structural hollow sections, EN10210:S420NH.

Yield strength
ReH min N/mm2;
Tensile strength
Rm N/mm2
Elongation % min
L0 = 5,65 √S0
specimen
Impact strength
10mm x 10mm
Carbon equivalent
(CEV) max
T ≤ 16mm 3mm < T ≤ 100mm T ºC J  
420 520-680 19 -20 40 0.45

Chemical composition % by mass

C max 0.2
Si max 0.6
Mn 1.7
P max 0.035
S max 0.03
Nb max 0.05
V ma 0.2
Al total min 0.02
Ti max 0.03
Cr max 0.3
Ni max 0.8
Mo max 0.1
Cu max 0.7
N max 0.025

Note: CEV ≤ 0.45 compared to EN10210:S420 CEV ≤ 0.5

Celsius 420 is produced from fully-killed steel – critical to formability and weldability.

Inspection and testing

Celsius hollow sections EN10210:S420NH are subject to specific inspection and testing and are supplied with an inspection certificate type 3.1 to EN10204.

EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Tolerances

Tolerances

Dimensional tolerances EN10210: Part 2

Celsius grades are manufactured to the tolerances defined in EN 10210: Part 2. Tighter tolerances are available on request and if you require specific tolerances in excess of this, please contact us.

  Circular/Ellipticals Square/Rectangular
Outside dimension
(D B and H)
Circular ±1% with a min of ±0.5mm and maximum of ±10mm.
Ellipticals ±1% with a min of ±0.5mm (The permitted tolerance is twice the value for H<250)
±1% with a min of ±0.5mm
Thickness (T) -10%
Note: Positive deviation limited by mass tolerance
-10%
Note: Positive deviation limited by mass tolerance
Squareness of side - 90 degrees ±1 degree
External corner profile - 2T max at each corner*
(EN10210 has 3T max)
Concavity/convexity (x) - – ±1% of the side, measured independently
of the tolerance on the outside dimension
Twist (V) Ellipticals: 2mm plus 0.5mm/m max
(The permitted tolerance is twice the value for H<250)
2mm plus 0.5mm/m max.
Section is placed on a flat surface with one end held flat. At the other end the height difference of the two lower corners is taken
Mass (M) ±6% on individual lengths ±6% on individual lengths
Straightness Maximum 0.2% of the total length & 3mm over every 1m length. 
Ellipticals: The permitted tolerance is twice the value for H<250
Maximum 0.2% of total length & 3mm over every
1m length
Length +150mm/-0mm +150mm/-0mm
Out-of-roundness (O) Circular 2% for hollow sections having a diameter to thickness ratio not exceeding 100 -

* Unless shown otherwise

EN-ConstructionEngineering-Product-Tubes-Celsius-S420NH Dimensions

Dimensions

Celsius 420 is available across the size range indicated in the tables, minimum order quantities may apply. Intermediate sizes may also be available. For further information or specific requests, please contact us.

Celsius 420 is available in standard lengths from 6.0m to 14.5m for sizes up to 100/100 or 120/80 and up to 15.3m for all other sizes.

Circular hollow sections (CHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16
42.4                  
48.3                  
60.3                  
76.1                  
88.9                  
114.3                  
139.7                  
168.3                  
193.7                  
219.1                  
244.5                  
273                  
323.9                  
355.6                  
406.4                  
457                  
508                  

 

Square hollow sections (SHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16
40/40                  
50/50                  
60/60                  
70/70                  
80/80                  
90/90                  
100/100                  
120/120                  
140/140                  
150/150                  
160/160                  
180/180                  
200/200                  
250/250                  
300/300                  
350/350                  
400/400                  

 

Rectangular hollow sections (RHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16
50/30                  
60/40                  
80/40                  
90/50                  
100/50                  
100/60                  
120/60                  
120/80                  
150/100                  
160/80                  
200/100                  
200/120                  
200/150                  
250/100                  
250/150                  
300/100                  
300/200                  
350/150                  
350/250                  
400/200                  
400/300                  
450/250                  
500/200                  
500/300                  

EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Design support

Free design support

Our team of dedicated engineers are on-hand to support engineers to make the most of our range of Celsius fully normalized hollow sections.
Email us on technicalmarketing@tatasteeleurope.com or phone on +44 (0)1536 404561 to speak to the team.

We also provide a number of free tools to make your specification of Celsius hollow sections as simple as possible:

  • Celsius design app - for quick and easy sizing of hollow sections (iOS and Android)
  • The Blue Book – the definitive guide to designing across our full range
  • Welded Joints calculation software
  • Firesoft for designing concrete-filled, fire-resistant columns
  • BIM Objects – available to download from our innovative BIM DNA Profiler

 

EN-ConstructionEngineering-Product-Tubes-Celsius-S460NH

S460NH
Specification details for S460NH

EN-ConstructionEngineering-Product-Tubes-Celsius-S460NH Key features

Key features
  • Fully normalized structural hollow sections, compliant with EN 10210:S460NH
  • High strength steel, enabling at least 20% weight saving and reduced carbon footprint, compared to an S460 strength section, when used in strength-limited applications
  • Normalized fine grain steel, so free of internal stresses and with a minimum strength of 460N/mm2 allowing the highest fabrication factors and enabling material cost savings and lighter structures
  • Available in a wide size range of square (40 x 40 x 3.2mm to 400 x 400 x 16mm) rectangular (50 x 30 x 3.2mm to 500 x 300 x 16mm) hollow sections
  • Tight corner radii (<2T) exceeding the standard - enhancing the product’s aesthetic appeal whilst avoiding the risk of brittle fracture which occurs in some cold formed products
  • Excellent dimensional consistency, high levels of formability, suitable for galvanising and, because the steel is fully-killed, excellent weldability
  • Fully compliant with CE marking and certified as suitable for all structural applications; overcomes design risks associated with other forms of hollow sections
  • Certified as suitable for mechanical applications, especially those involving cyclical loading
  • Suitable for low temperature applications (40J @ -20°C)
  • Batch-tested to give the properties of the specific delivered material; full test certification supplied
  • Clearly marked as Celsius® S460NH, and supplied with a 3.1 test certificate for the reassurance of batch traceability
  • Full technical support available

EN-ConstructionEngineering-Product-Tubes-Celsius-S460NH Properties

Properties

High strength hot finished hollow sections suitable for all construction and mechanical applications. Celsius® 460 is suitable for all internal and external applications to BS5950-1:2000, EN1993 and BS5400.

Mechanical properties

Celsius 460 hollow sections are supplied with a minimum yield strength of 460 N/mm2 and comply fully with the European Standard for hot finished structural hollow sections, EN10210:S460NH.

Yield strength
ReH min N/mm2
Tensile strength
Rm N/mm2
Elongation % min
L0 = 5.65 √S0
specimen
Impact strength
10mm x 10mm
Carbon equivalent
(CEV) max
T ≤ 16mm T ≤ 65mm T ºC J  
460 540-720 17 -20 27 0.45

Chemical composition % by mass

C max 0.2
Si max 0.6
Mn 1.7
P max 0.035
S max 0.03
Nb max 0.05
V ma 0.2
Al total min 0.02
Ti max 0.03
Cr max 0.3
Ni max 0.8
Mo max 0.1
Cu max 0.7
N max 0.025

Note: CEV ≤ 0.45.
Celsius 460 is produced from fully-killed steel – critical to formability and weldability.

Inspection and testing

Celsius hollow sections EN10210:S460NH are subject to specific inspection and testing and are supplied with an inspection certificate type 3.1 to EN10204.

EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Tolerances

Tolerances

Dimensional tolerances EN10210: Part 2

Celsius grades are manufactured to the tolerances defined in EN 10210: Part 2. Tighter tolerances are available on request and if you require specific tolerances in excess of this, please contact us.

  Circular/Ellipticals Square/Rectangular
Outside dimension
(D B and H)
Circular ±1% with a min of ±0.5mm and maximum of ±10mm.
Ellipticals ±1% with a min of ±0.5mm (The permitted tolerance is twice the value for H<250)
±1% with a min of ±0.5mm
Thickness (T) -10%
Note: Positive deviation limited by mass tolerance
-10%
Note: Positive deviation limited by mass tolerance
Squareness of side - 90 degrees ±1 degree
External corner profile - 2T max at each corner*
(EN10210 has 3T max)
Concavity/convexity (x) - – ±1% of the side, measured independently
of the tolerance on the outside dimension
Twist (V) Ellipticals: 2mm plus 0.5mm/m max
(The permitted tolerance is twice the value for H<250)
2mm plus 0.5mm/m max.
Section is placed on a flat surface with one end held flat. At the other end the height difference of the two lower corners is taken
Mass (M) ±6% on individual lengths ±6% on individual lengths
Straightness Maximum 0.2% of the total length & 3mm over every 1m length. 
Ellipticals: The permitted tolerance is twice the value for H<250
Maximum 0.2% of total length & 3mm over every
1m length
Length +150mm/-0mm +150mm/-0mm
Out-of-roundness (O) Circular 2% for hollow sections having a diameter to thickness ratio not exceeding 100 -

* Unless shown otherwise

EN-ConstructionEngineering-Product-Tubes-Celsius-S460NH Dimensions

Dimensions

Celsius S460NH is available across the size range indicated in the tables, minimum order quantities may apply. Intermediate sizes may also be available. For further information or specific requests, please contact us.

Celsius S460NH is available in standard lengths from 6.0m to 14.5m for sizes up to 100/100 or 120/80 and up to 15.3m for all other sizes.

Square hollow sections (SHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16
40/40                  
50/50                  
60/60                  
70/70                  
80/80                  
90/90                  
100/100                  
160/160                  
180/180                  
200/200                  
250/250                  
300/300                  
350/350                  
400/400                  

 

Rectangular hollow sections (RHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16
50/30                  
60/40                  
80/40                  
90/50                  
100/50                  
100/60                  
120/60                  
120/80                  
200/120                  
200/150                  
250/100                  
250/150                  
300/100                  
300/200                  
350/150                  
350/250                  
400/200                  
400/300                  
450/250                  
500/200                  
500/300                  

 

Circular hollow sections (CHS)   
mm 5 6.3 8 10 12.5 16
219.1            
244.5            
273            
323.9            
355.6            
406.4            
457            
508            

 

EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Design support

Free design support

Our team of dedicated engineers are on-hand to support engineers to make the most of our range of Celsius fully normalized hollow sections.
Email us on technicalmarketing@tatasteeleurope.com or phone on +44 (0)1536 404561 to speak to the team.

We also provide a number of free tools to make your specification of Celsius hollow sections as simple as possible:

  • Celsius design app - for quick and easy sizing of hollow sections (iOS and Android)
  • The Blue Book – the definitive guide to designing across our full range
  • Welded Joints calculation software
  • Firesoft for designing concrete-filled, fire-resistant columns
  • BIM Objects – available to download from our innovative BIM DNA Profiler

 

EN-ConstructionEngineering-Product-Tubes-Celsius-Celsius weathering grade

Celsius weathering grade
Specification details for Celsius weathering grade

EN-ConstructionEngineering-Product-Tubes-Celsius-Weathering grade Key features

Key features
  • Weathering steel forms a dense patina which protects it from oxygen, slowing corrosion for a useful life of 50 to 120 years.
  • Weathering steel doesn’t need any further protection eliminating, in most cases, the need for galvanising, painting and ongoing maintenance.
  • The natural and evolving patina of weathering grade Celsius® blends in perfectly with the natural environment.
  • All Celsius® hollow sections are true hot finished, so free from internal stresses and with tight corner radii to maximise weldable-surface and enhance aesthetic appeal, whilst avoiding the risk of brittle fracture which occurs in some cold formed products.
  • The corner radius on squares and rectangles is 2T max. This exceeds the requirements of EN 10210:2006.
  • Weathering grade Celsius® has a low CEV of 0.44 max. This guarantees excellent weldability.
  • Suitable for galvanising (where necessary) and for low temperature applications (40J @ -20°C). 
  • Batch-tested and fully traceable, supplied with a full 3.1 test certificate.
  • All Celsius® sections are CE marked and fully compliant with the Construction Products Regulation.
  • Available in a wide range of circular, square and rectangular hollow sections with a wall thickness up to 16mm.
  • Full technical support in material selection and application available.

EN-ConstructionEngineering-Product-Tubes-Celsius-Weathering grade Properties

Properties

High strength hot finished hollow sections suitable for a wide range of construction and mechanical applications. Weathering grade Celsius® is suitable for all external applications to European and American design standards.

Mechanical properties

Yield strength;
ReHmin N/mm2;
Tensile strength;
RmN/mm2
Elongation % min
L0;= 5,65 √S0
specimen
Impact strength
10mm x 10mm
Carbon equivalent
(CEV) max
T ≤ 16mm 3mm < T ≤ 100mm T ºC J  
355 470-630 22 -20 40 0.44

CEV value exceeds the requirements of S355J2WH, prEN 10210 (2016).

Chemical composition % by mass

C max 0.16
Si max 0.5
Mn 0.5 - 1.5
P max 0.025
S max 0.008
Nb max 0.05
V max 0.1
Al total min 0.02
Ti max 0.03
Cr 0.4 - 0.65
Ni max 0.4
Mo max 0.1
Cu 0.25 - 0.4
N max 0.012
  • Chemical composition meets or exceeds the requirements of S355J2WH, prEN 10210 (2016).
  • Available in grades S355J2H and S355K2H.
  • Chemistry and mechanical properties comply with ASTM A847
  • The steel is aluminium-killed.

Inspection and testing

Celsius® Weathering Grade hollow sections are subject to specific inspection and testing and are supplied with an inspection certificate type 3.1 to EN 10204.

EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Tolerances

Tolerances

Dimensional tolerances EN10210: Part 2

Celsius grades are manufactured to the tolerances defined in EN 10210: Part 2. Tighter tolerances are available on request and if you require specific tolerances in excess of this, please contact us.

  Circular/Ellipticals Square/Rectangular
Outside dimension
(D B and H)
Circular ±1% with a min of ±0.5mm and maximum of ±10mm.
Ellipticals ±1% with a min of ±0.5mm (The permitted tolerance is twice the value for H<250)
±1% with a min of ±0.5mm
Thickness (T) -10%
Note: Positive deviation limited by mass tolerance
-10%
Note: Positive deviation limited by mass tolerance
Squareness of side - 90 degrees ±1 degree
External corner profile - 2T max at each corner*
(EN10210 has 3T max)
Concavity/convexity (x) - – ±1% of the side, measured independently
of the tolerance on the outside dimension
Twist (V) Ellipticals: 2mm plus 0.5mm/m max
(The permitted tolerance is twice the value for H<250)
2mm plus 0.5mm/m max.
Section is placed on a flat surface with one end held flat. At the other end the height difference of the two lower corners is taken
Mass (M) ±6% on individual lengths ±6% on individual lengths
Straightness Maximum 0.2% of the total length & 3mm over every 1m length. 
Ellipticals: The permitted tolerance is twice the value for H<250
Maximum 0.2% of total length & 3mm over every
1m length
Length +150mm/-0mm +150mm/-0mm
Out-of-roundness (O) Circular 2% for hollow sections having a diameter to thickness ratio not exceeding 100 -

* Unless shown otherwise

EN-ConstructionEngineering-Product-Tubes-Celsius-Weathering grade Dimensions

Dimensions

Celsius weathering grade is available across the size range indicated in the tables, minimum order quantities may apply. Intermediate sizes may also be available. For further information or specific requests, please contact us.

Celsius weathering grade is available in standard lengths from 6.0m to 14.5m for sizes up to 100/100 or 120/80 and up to 15.3m for all other sizes.

Circular hollow sections (CHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16
42.4                  
48.3                  
60.3                  
76.1                  
88.9                  
114.3                  
139.7                  
168.3                  
193.7                  
219.1                  
244.5                  
273                  
323.9                  
355.6                  
406.4                  
457                  
508                  

 

 

Square hollow sections (SHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16
40/40                  
50/50                  
60/60                  
70/70                  
80/80                  
90/90                  
100/100                  
120/120                  
140/140                  
150/150                  
160/160                  
180/180                  
200/200                  
250/250                  
300/300                  
350/350                  
400/400                  

 

 

Rectangular hollow sections (RHS)   
mm 3.2 3.6 4 5 6.3 8 10 12.5 16
50/30                  
60/40                  
80/40                  
90/50                  
100/50                  
100/60                  
120/60                  
120/80                  
150/100                  
160/80                  
200/100                  
200/120                  
200/150                  
250/100                  
250/150                  
300/100                  
300/200                  
350/150                  
350/250                  
400/200                  
400/300                  
450/250                  
500/200                  
500/300                  

EN-ConstructionEngineering-Product-Tubes-Celsius-Weathering grade CE Marking

CE Marking

Celsius® Weathering Grade hollow sections are manufactured and CE marked in accordance with EN10210-1&2:2006 grade S355J2H or S355K2H. Manufactured from steel with improved atmospheric corrosion resistance (chemistry complies with the requirements for EN10025:-5 S355K2W). 3.1 test certification to EN10204.

EN-ConstructionEngineering-Product-Tubes-Celsius-All grades Design support

Free design support

Our team of dedicated engineers are on-hand to support engineers to make the most of our range of Celsius fully normalized hollow sections.
Email us on technicalmarketing@tatasteeleurope.com or phone on +44 (0)1536 404561 to speak to the team.

We also provide a number of free tools to make your specification of Celsius hollow sections as simple as possible:

  • Celsius design app - for quick and easy sizing of hollow sections (iOS and Android)
  • The Blue Book – the definitive guide to designing across our full range
  • Welded Joints calculation software
  • Firesoft for designing concrete-filled, fire-resistant columns
  • BIM Objects – available to download from our innovative BIM DNA Profiler