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  • Structural Hollow Sections - Strongbox®

    Strongbox® 235 is a cold formed, low grade hollow section manufactured to high quality standards.

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    Contact us

    Tata Steel

    PO Box 101

    Weldon Road, Corby

    Northants NN17 5UA

    T +44 (0)1536 402121

    F +44 (0)1536 404111

    Overview

     

    General hollow sections - Strongbox®235

    Key features

    • Excellent quality, made with steel from a high quality production process
    • Minimum strength of 235 MPa
    • High levels of formability and, because the steel is fully-killed, excellent weldability
    • Product subject to non-specific inspection and testing; with test report supplied
    • Excellent consistent dimensional tolerances
    • Excellent supply availability through approved stockholders
    • Suitable for galvanising

     

     

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    Properties

     

    Mechanical properties

    Yield strength
    ReH min N/mm2
    T≤16mm
    235

    Strongbox®235 hollow sections EN10219 S235JRH are subject to non-specific inspection and testing and are supplied with a test report type 2.2 to EN10204.

     

     

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    Dimensions

    Dimensional capability

    Available in sizes from 33.7 x 3.0 OD up to and including 139.7 x 6.0 OD in our circular hollow sections range and from 25 x 25 x 2.0 up to and including 150 x 150 x 8.0 and the equivalent rectangles in our rectangular hollow sections range.

    Strongbox® 235 is supplied with a test report 2.2 to EN10204. Standard lengths are 7.5 metres, with special mill lengths from 6 metres up to 14 metres available by arrangement.

    Dimensional tolerances

    Dimensional tolerances are in accordance with EN10210: Part 2

     CircularSquare/Rectangular 
    Outside dimension (D B and H) ±1% with a min of ±0.50mm and a max of ±10mm Side length (mm)  Tolerance
        H,B < 100 ±1% with a min of ±0.5mm
        100 ≤ H,B ±0.8%
        H,B > 200 ±0.6%
    Thickness (T)  For D≤406.4mm    
      T ≤ 5mm ±10% T ≤ 5mm ± 10%
      T > 5mm ±0.50mm T > 5mm  ±0.50mm
    Out of roundness (O)  2% for D/T < 100, where D/T ≥ 100 out-of-roundness -  
      tolerance to be agreed    
    Concavity/Convexity (independent Max 0.8% with a min of 0.5mm
    tolerance on outside dimensions)      
    Squareness of side 90º ± 1  
    External corner profile T ≤ 6.0 1.6T to 2.4T
    (radius need not be tangential to the   6.0 < T ≤10.0 2.0T to 3.0T
    sides) EN10219: Part 2 Table 3      
    Twist (V) 2mm plus 0.5mm/m length
    Straightness  0.20% of total length & 3mm over any 1m length 0.15% of total length & 3mm over any 1m length
    Mass (M) ±6% on individual lengths ±6% on individual lengths ±6% on individual lengths  
    Length -0 +50mm -0 +50mm -0 +50mm  

     

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    Downloads

     

    Strongbox® 235

    Technical information, sizes and properties of the Hybox Cold Formed product range.

    Strongbox brochure (English)
    Strongbox brochure (Deutsch)
    Strongbox brochure (Nederlandse)
    Strongbox brochure (Francais)

    Hollow Sections: For structural and mechanical applications

    Steel hollow sections are the most versatile and efficient form for construction and mechanical applications.

     

     

    back to top

    Overview

    Overview

     

    General hollow sections - Strongbox®235

    Key features

    • Excellent quality, made with steel from a high quality production process
    • Minimum strength of 235 MPa
    • High levels of formability and, because the steel is fully-killed, excellent weldability
    • Product subject to non-specific inspection and testing; with test report supplied
    • Excellent consistent dimensional tolerances
    • Excellent supply availability through approved stockholders
    • Suitable for galvanising

     

     

    back to top

    Properties

    Properties

     

    Mechanical properties

    Yield strength
    ReH min N/mm2
    T≤16mm
    235

    Strongbox®235 hollow sections EN10219 S235JRH are subject to non-specific inspection and testing and are supplied with a test report type 2.2 to EN10204.

     

     

    back to top

    Dimensions

    Dimensions

    Dimensional capability

    Available in sizes from 33.7 x 3.0 OD up to and including 139.7 x 6.0 OD in our circular hollow sections range and from 25 x 25 x 2.0 up to and including 150 x 150 x 8.0 and the equivalent rectangles in our rectangular hollow sections range.

    Strongbox® 235 is supplied with a test report 2.2 to EN10204. Standard lengths are 7.5 metres, with special mill lengths from 6 metres up to 14 metres available by arrangement.

    Dimensional tolerances

    Dimensional tolerances are in accordance with EN10210: Part 2

     CircularSquare/Rectangular 
    Outside dimension (D B and H) ±1% with a min of ±0.50mm and a max of ±10mm Side length (mm)  Tolerance
        H,B < 100 ±1% with a min of ±0.5mm
        100 ≤ H,B ±0.8%
        H,B > 200 ±0.6%
    Thickness (T)  For D≤406.4mm    
      T ≤ 5mm ±10% T ≤ 5mm ± 10%
      T > 5mm ±0.50mm T > 5mm  ±0.50mm
    Out of roundness (O)  2% for D/T < 100, where D/T ≥ 100 out-of-roundness -  
      tolerance to be agreed    
    Concavity/Convexity (independent Max 0.8% with a min of 0.5mm
    tolerance on outside dimensions)      
    Squareness of side 90º ± 1  
    External corner profile T ≤ 6.0 1.6T to 2.4T
    (radius need not be tangential to the   6.0 < T ≤10.0 2.0T to 3.0T
    sides) EN10219: Part 2 Table 3      
    Twist (V) 2mm plus 0.5mm/m length
    Straightness  0.20% of total length & 3mm over any 1m length 0.15% of total length & 3mm over any 1m length
    Mass (M) ±6% on individual lengths ±6% on individual lengths ±6% on individual lengths  
    Length -0 +50mm -0 +50mm -0 +50mm  

     

    back to top

    Downloads

    Downloads

     

    Strongbox® 235

    Technical information, sizes and properties of the Hybox Cold Formed product range.

    Strongbox brochure (English)
    Strongbox brochure (Deutsch)
    Strongbox brochure (Nederlandse)
    Strongbox brochure (Francais)

    Hollow Sections: For structural and mechanical applications

    Steel hollow sections are the most versatile and efficient form for construction and mechanical applications.

     

     

    back to top