Mechanical 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.

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

Yield strength;ReHmin N/mm2; Tensile strength;
Elongation % min
L0;= 5,65 √S0
Impact strength
10mm x 10mm
Carbon equivalent
(CEV) max
T ≤ 16mm T > 16mm 3mm < T ≤ 100mm T ºC J  
355 345 470-630 22 -20 40 0.43

Chemical composition % by mass

C max Si max Mn P max S max Nb max V ma Al total min Ti max Cr max Ni max Mo max Cu max N max
0.20 0.50 0.90
0.035 0.030 0.050 0.12 0.020 0.03 0.30 0.50 0.10 0.35 0.020

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.