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Carbon Steel Grades

From structural to high-strength alloy — comprehensive carbon steel grade coverage for construction, manufacturing, and engineering applications

Popular Grades

A36 / ASTM A36

Standard structural steel for construction. Excellent weldability and formability at competitive cost.

Yield≥250 MPa

Tensile400-550 MPa

A572 Gr.50 / ASTM A572

High-strength low-alloy structural steel. 50 ksi minimum yield for demanding structural applications.

Yield≥345 MPa

Tensile≥450 MPa

1018 / AISI 1018

General purpose low carbon steel with excellent formability and weldability. Ideal for cold forming and machining.

FormabilityExcellent

WeldabilityExcellent

1020 / AISI 1020

Mild carbon steel with good balance of strength and ductility. Suitable for shafts, pins, and general engineering.

Tensile≥410 MPa

Hardness≤143 HB

1045 / AISI 1045

Medium carbon steel with excellent strength after heat treatment. Used for shafts, gears, and machinery parts.

Tensile≥585 MPa

Hardness170-210 HB

C45 / EN8 / 1.0503

European standard medium carbon steel. Good hardenability for shafts, studs, and automotive components.

Tensile550-700 MPa

HardeningCan be hardened

4140 / AISI 4140

Chromium-molybdenum alloy steel with excellent hardenability and toughness. For heavy-duty shafts, gears, and tooling.

Tensile≥850 MPa

HardeningCan be hardened

4340 / AISI 4340

High-strength nickel-chromium-molybdenum alloy steel. Superior toughness for aerospace and heavy machinery.

Tensile≥980 MPa

More Grades

Structural Steel ASTM/EN/JIS/GB

C ≤0.20%Mn ≤1.40% Yield ≥245 MPaTensile 400-510 MPa

C ≤0.20%Mn ≤1.40% Yield ≥235 MPaTensile 360-510 MPa

C ≤0.21%Mn ≤1.50% Yield ≥275 MPaTensile 430-580 MPa

C ≤0.20%Mn ≤1.70% Yield ≥345 MPaTensile 470-630 MPa

C ≤0.24%Mn ≤1.60% Yield ≥355 MPaTensile 470-630 MPa

C ≤0.20%Mn ≤1.40% Yield ≥235 MPaTensile 370-500 MPa

C ≤0.31%Mn 0.85-1.20% Yield ≥260 MPaTensile 485-620 MPa

C ≤0.24%Mn ≤0.90% Yield ≥205 MPaTensile 380-515 MPa

Low Carbon Steel 0.05–0.25% C

C 0.08-0.13%Mn 0.30-0.60% P ≤0.04%S ≤0.05%

C 0.18-0.23%Mn 0.30-0.60% P ≤0.04%S ≤0.05%

C 0.28-0.34%Mn 0.60-0.90% P ≤0.04%S ≤0.05%

C 0.15-0.20%Mn 0.60-0.90% Formability ExcellentWeldability Excellent

C ≤0.12%Mn ≤0.50% Cold rolledDeep drawing

C ≤0.12%Mn ≤0.60% Cold rolledEN 10130

Medium Carbon Steel 0.25–0.60% C

C 0.48-0.53%Mn 0.60-0.90% Tensile ≥620 MPaHardness 180-230 HB

C 0.55-0.65%Mn 0.60-0.90% Tensile ≥670 MPaHardness 190-240 HB

C 0.42-0.48%Mn 0.60-0.90% Tensile ≥570 MPaGood machinability

C 0.50-0.60%Mn 0.50-0.80% Tensile 600-750 MPaHardness 190-250 HB

C 0.52-0.60%Mn 0.60-0.90% Tensile ≥630 MPaCan be hardened

C 0.43-0.50%Mn 0.60-0.90% Tensile ≥585 MPaHardness 170-210 HB

Alloy Steel Cr-Mo / Ni-Cr-Mo

C 0.28-0.33%Mn 0.40-0.60% Cr 0.80-1.10%Mo 0.15-0.25%

C 0.18-0.23%Mn 0.70-0.90% Ni 0.40-0.70%Cr 0.40-0.60%

C 0.35-0.45%Mn 0.50-0.80% Cr 0.90-1.50%Mo 0.20-0.40%

C 0.35-0.45%Mn 0.45-0.70% Ni 1.30-1.80%Cr 0.90-1.40%

C 0.38-0.45%Cr 0.90-1.20% Mo 0.15-0.30%Tensile ≥900 MPa

C 0.30-0.38%Ni 1.30-1.70% Cr 1.30-1.70%Tensile ≥1100 MPa

C 0.98-1.10%Cr 1.30-1.60% Hardness ≥60 HRCBearing steel

C 0.56-0.64%Mn 0.75-1.00% Cr 0.70-0.90%Spring steel