S40C steel is a kind of non-alloy steel with high tensile strength. It has good machinability and cold deformation. While the weldability is not very good. S40C steel doesn’t have temper brittleness, it has low hardenability. It may have water quenching crack easily.
C: 0.37-0.43, Si 0.15-0.35, Mn 0.6-0.9, P≤0.03， S≤0.035
Tensile strength σb (MPa)：≥570
Yield strength σs (MPa)：≥335
Elongation δ5 (%)：≥19
Reduction of areaψ (%)：≥45
Impact Akv (J)：≥47
Hardness：≤217HB (without heat treatment); ≤187HB ( annealing)
Normalizing: 860℃，Quenching：840℃， tempering 600℃
S40C is usually used after being tempered or normalized. It can be used as parts that can withstand great stress. Such as crankshaft spindle, transmission shaft, piston rod and gear, etc. When S40C is used as welded parts, it need to be heated before welding, and need slow cooling after welding.
Shanghai Katalor has a series of deep processing machines, like flame cutting machines, bending machines, drilling machines, we can do the processing works, such as cutting, bending, drilling, welding etc. We not only provide the raw material, such as S40C steel plates,S40C round bar, S40C steel tube/pipe etc, but also provide the S40C steel works, S40C steel structures, S40C steel machine parts. Katalor can offer the S40C steel products according to your requirements strictly. If you need further information, just feel free to contact with us.