S355MC. High elastic limit steels

Low-alloy, high yield strength structural steels for cold forming, with good mechanical strength and weight reduction.

Welding: Excellent
Bending: Excellent
Forming: Excellent
Machining: Moderate

General Specifications *:

C ≤ 0.12. Mn ≤ 1.50. Si ≤ 0.50. P ≤ 0.025. S ≤ 0.020. Ti ≤ 0.15. Al ≥ 0.015. Nb ≤ 0.09. V ≤ 0.20. Cr+Mo+Ni ≤ 0.22.
Rm: 430/520 N/mm². ReH: ≥ 355 N/mm². As: ≥ 23 %.

TYPICAL CHARACTERISTICS AND APPLICATIONS

S355MC is a low-alloy, high yield strength structural steel, thermomechanically rolled according to EN 10149-2.

It is designed for cold-forming applications requiring good mechanical strength, weldability, and structural weight reduction.

It is a microalloyed, low-carbon steel with a fine-grain structure obtained through controlled rolling.

Its main alloying elements are carbon, manganese, and silicon, complemented with microalloying elements such as niobium, vanadium, and titanium, which improve grain refinement and mechanical performance.

It combines a guaranteed minimum yield strength of 355 MPa with good ductility, toughness, and dynamic load behavior.

Particularly suitable for cold-formed structural parts, welded components, profiles, frames, machinery, chassis, supports, crane elements, lightweight structures, and assemblies where weight reduction is required without losing load-bearing capacity.

DELIVERY CONDITION

S355MC steels are thermomechanically produced in coils and delivered as cut sheets.

Surface finish:
According to EN 10163-2 Class A, subclass 3

Dimensional tolerances:
Flatness exceeding EN 10051
Dimensions according to EN 10051

WELDING AND OXYCUTTING

S355MC has excellent weldability thanks to its low carbon content and low carbon equivalent, with a typical CEV around 0.17 %.

Suitable for MIG/MAG, TIG, and manual arc welding with standard structural consumables, e.g., ER70S-6 or equivalents.

For thicker sections, moderate preheating may be recommended depending on structural restraint. Heat input should be controlled to avoid excessive microstructure alteration.

FORMING

Specifically designed for cold forming. Suitable for bending, deep drawing, and profiling with reduced minimum radii depending on thickness.

The minimum transverse bending radius is generally 2.05 x t for typical thicknesses.

Work hardening during severe operations should be considered.

Moderate machinability, approximately 60% compared to an easily machinable steel such as AISI 1212.

Use carbide tools and cutting parameters suitable for its mechanical strength.

Stock Program

• Wide range of thicknesses and formats:
• From 2 to 15 mm, with widths up to 1,600 mm and lengths up to 16,000 mm on request.
• Check our warehouse stock for each supply and delivery times for non-standard formats.
• We also supply sheet parts cut in multiples of 1,000 mm while maintaining width.
• Oxycutting of custom parts from 6–8 mm thickness.

* General specifications are indicative. Each delivery comes with a certificate showing guaranteed values for the supplied batch.

View datasheet