Steel grade S355

S355 Engineering steel

S355 grade steel is a medium tensile, low carbon manganese steel which is readily weldable and possesses good impact resistance (also in sub-zero temperatures).

This material is commonly supplied in the untreated or normalised condition. Machinability is similar to that of mild steel.

This grade was first specified as the European EN10025 standard and later published by the British Standards Institute as BS EN 10025, S355, S355J2 and S355J2+N. These superseded the BS4360.

Steel stock range

High Peak Steels stock S355 in black steel round bar.

Associated standards

UK Standard S355 | European Grades EN14A | 150M19

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EN10025 (S355) black steel

ProductMin sizeMax size
codes-round220mm dia330mm dia
codes-flat2
codes-square2
codes-hex2

EN10025 (S355) Chemical Composition

 CSiMnSPCrNiMo
Min
Max0.220.551.60.030.03

EN10025 (S355) Mechanicals

UnitSize Range
mm
Yield
N/mm2
0.2% proof
N/mm2
UTS (Rm)
N/mm2
Elong (A)
%
Red of Area (Z)
%
Hardness
HB
Impact test (KV)
J
Normalised (min)S355J2+N 16mm dia 3454702227
Normalised (max)S355J2+N 40mm dia 630
Normalised (min)S355J2+N 100mm dia 2954501827
Normalised (max)S355J2+N 150mm dia 600
Normalised (min)S355J2G3 250mm dia 2654002325
Normalised (max)S355J2G3 500mm dia

Typical Applications of EN10025 steel

  • WELDED STRUCTURES
  • CONSTRUCTION
  • BRIDGE COMPONENTS