EN 10083-3 41Cr4 alloy structural steel

41Cr4 (1.7035) is a grade of alloy structural steel commonly used internationally. Its tensile strength, yield strength and hardenability are all higher than that of No. 40 steel, but it also has certain defects that its weldability is limited and there is a tendency to form cracks.

41Cr4 alloy structural steel executive standard: EN 10083-3.
Chemical composition of 41Cr4 alloy structural steel (element composition: wt%):
Carbon C: 0.38-0.45; Silicon Si: allowable residual content ≤0.40; manganese Mn: 0.60-0.90; sulfur S: allowable residual content ≤0.035; phosphorus P: allowable residual content ≤0.035; chromium Cr: 0.90-1.20; nickel Ni : Allowable residual content ≤0.030; Copper Cu: Allowable residual content ≤0.030.

Mechanical properties of 41Cr4 alloy structural steel:
Tensile strength σb (MPa): ≥980(100)
Yield strength σs (MPa): ≥785(80)
Elongation δ5 (%): ≥9
Reduction of area ψ (%): ≥45
Impact energy Akv (J): ≥47
Impact toughness value αkv (J/cm2): ≥59(6)
Hardness: ≤207HB
41Cr4 steel heat treatment: heat treatment (normalizing, annealing or high temperature tempering) or no heat treatment.

41Cr4 alloy structural steel is generally used for more important quenched and tempered parts, such as parts that work under alternating loads, medium speed and medium load parts, etc.