S460M/ML

Structural steel grades

Technical information

Structural shapes in S460 are produced by thermomechanical rolling (S460M or S460ML according to European standard EN 10025:2004), a process that affects the chemical composition of the material, reducing its alloy content and thus increasing the yield strength.

S460 steels are mainly used for:

  • columns for multi-storey buildings
  • beams in short to medium span bridges
  • diagonals & chord members of trusses
  • seismic design: "clean columns" and stronger columns without costly web reinforcement

S460 High strength structural steel grades

S460 Structural steels grades are high strength weldable fine grain structural steels.

Technical information

Each grade can be obtained with guaranteed impact properties at -20°C (N or M grades), or for low-temperature applications, at -50°C (NL or ML grades).

High strength weldable fine grain structural steels offer good weldability with all conventional welding processes.

These steels are used for welded parts that must withstand high levels of strain. Typical applications are bridges, long span structures, high-rise buildings, and other architectural structures.

Since 1 July 2013, the Construction Products Regulation (Regulation (EU) No. 305/2011 – CPR) has required that CE marking be affixed to all products delivered in accordance with a harmonised standard. This CE marking guarantees, for the uses defined in the standard, the properties described in the declaration of performance submitted by the manufacturer. All of the steels in this data description comply with this regulation.


Weight & cost reduction

Using S460 grade steels for structural sections presents numerous advantages for multi-storey and high-rise buildings thanks to their optimum balance of cost and efficiency:

  • reduction of the size of the structural sections, especially for columns
  • lighter buildings with equal structural safety
  • better weldability requiring no or less pre-heating and less welding material
  • weight reduction of 10-30% when using S460 (65 ksi) instead of S355 (50 ksi): 15% for columns, 20-35% for trusses

Mechanical properties:

EN Standard
Designation Direction Thickness Re Rm A 5.65√So KV 20°C KV 0°C KV -10°C KV -20°C KV -30°C KV -40°C
KV -50°C
  EN 10027-1 EN 10027-2   (mm) (MPa) (MPa) (%) (J) (J) (J) (J) (J)  (J) (J)
EN 10025-3 S460N 1.8901 L 5-80 - - - ≥ 55 ≥ 47 ≥ 43 ≥ 40      
T 5-16 ≥ 460 540-720 ≥ 17 ≥ 31 ≥ 31 ≥ 24 ≥ 20      
16-40 ≥ 440      
40-63 ≥ 430      
63-80 ≥ 410      
S460NL 1.8903 L 5-80     ≥ 16 ≥ 63 ≥ 55 ≥ 51 ≥ 47 ≥ 40 ≥ 31 ≥ 27
T 5-16 ≥ 460 540-720 ≥ 17   ≥ 40    ≥ 34    ≥ 30  ≥ 27 ≥ 23 ≥ 20 ≥ 16
16-40 ≥ 440
40-63 ≥ 430
63-80 ≥ 410 ≥ 16
EN 10025-4 S460M   1.8827   L 5-40       ≥ 55 ≥ 47 ≥ 43 ≥ 40          
5-16  ≥ 460 540-720 ≥ 17 ≥ 31 ≥ 27  ≥ 24 ≥ 20
16-40 ≥ 440
S460ML   1.8838   L 5-40       ≥ 63 ≥ 55 ≥ 51 ≥ 47  ≥ 40 ≥ 31 ≥ 27
  5-16 ≥ 460 540-720 ≥ 17 ≥ 40 ≥ 34 ≥ 30 ≥ 27 ≥ 23 ≥ 20 ≥ 16
16-40 ≥ 440

Chemical properties:

EN Standard Designation  Thickness  C (%) Mn (%) P (%)  S (%) Si (%) Al (%) Cu (%) Cr (%) Ni (%) Nb (%) V (%) Ti (%) N (%) Ceq (%) Mo (%)
  EN 10027-1 EN 10027-2 (mm)                              
 EN 10025-3 S460N 1.8901  5-63 ≤0.20 1-1.70 ≤0.030 ≤0.025 ≤0.60 ≥0.020 ≤0.55 ≤0.30 ≤0.80 ≤0.050 ≤0.20 ≤0.050 ≤0.025 ≤0.53 ≤0.10
63-80                           ≤0.54  
S460NL 1.8903 5-63 ≤0.20 1-1.70 ≤0.025 ≤0.020 ≤0.60 ≥0.020 ≤0.55 ≤0.30 ≤0.80 ≤0.050 ≤0.20 ≤0.050 ≤0.025 ≤0.53 ≤0.10
63-80                           ≤0.54  
EN 10025-4 S460M 1.8827 5-16 ≤0.16 ≤1.70 ≤0.030 ≤0.025 ≤0.60 ≥0.020 ≤0.55 ≤0.30 ≤0.80 ≤0.050 ≤0.12 ≤0.050 ≤0.025 ≤0.45 ≤0.20
16-40                           ≤0.46  
S460ML 1.8838 5-16 ≤0.16 ≤1.70 ≤0.025 ≤0.020 ≤0.60 ≥0.020 ≤0.55 ≤0.30 ≤0.80 ≤0.050 ≤0.12 ≤0.050 ≤0.025 ≤0.45 ≤0.20
16-40                           ≤0.46