Structural steel grades

Sections and merchant bars

Structural steel grades

Technical information

Non-alloy structural steels according to European standards:

  • S235JR, S235J0, S235J2*
  • S275JR, S275J0, S275J2*
  • S355JR, S355J0, S355J2, S355K2
  • S450J0

Weldable fine grain structural steels according to European standards:

  • S275M*
  • S355M, S355ML
  • S420M, S420ML
  • S460M, S460ML

Steel grades according to American standards:

  • A36-14 Grade 36*
  • A572-15 Grade 42*, 50, 55*, 60*, 65*
  • A588-15 Grade B*
  • A709-13 Grade 36*, Grade 50, Grade 50S
  • A913-15 Grade 50, 65, 70, A992-11(15) Grade 50

Steel grades according to Russian standards:

  • GOST 535-2005 St3ps* cat 5
  • GOST 19281-2014 09G2S*

Steel grades according to Japanese standards:

  • JIS G 3106-2015 SM 400 A*, SM 400 B*, SM 400 C*; SM 490 YA* SM 490 YB*
  • JIS G 3101-2015 SS 400*, S 490*

*available upon agreement

Other grades are available upon request.

A wide range of the highest quality

The mechanical characteristics of ArcelorMittal's sections are improved by precise control of the temperature during the rolling process.

Steels, produced using thermomechanical rolling (delivery condition M), feature improved toughness values thanks to a lower carbon equivalent and a fine microstructure when compared with normalised steels. With regard to their technological properties, the thermomechanically rolled steels have good cold forming properties. Similar to conventional structural steels, they can be flame straightened provided specific maximum temperatures are not exceeded.

In case stress relieving is considered for reducing residual stresses, the usual parameters concerning temperature range and heating time according to the rules of practice must be applied. Hot forming, which is uncommon for the fabrication of sections, must not be performed in accordance with EN 10025:2004.

The steels are typically delivered with an Si content ranging between 0.14% and 0.25% and are as such capable of forming a zinc layer during hot-dip galvanisation.

As the phosphorus content of these steels is usually lower than 0.035%, this does not have any influence on the final thickness of the coating in the considered Si range.