Carbon Structural Steel Sheet No.40
Characteristics and application example:
High strength, good machinability, cold deformation of medium and poor welding, no temper brittleness, low hardenability, easy raw water quenching cracks, multi-state in the use of quenched and tempered or normalized, both overall performance close to the surface After quenching can be used to manufacture parts to withstand greater stress. Suitable for making crank spindle. Shaft. Rod. Rod. Sprockets. Gears, welding parts required for the first warm-up. Slow cooling after welding.
Chemical Composition: Carbon C :0.37-0 .44 ,Si Si :0.17-0 .37 ,Manganese Mn :0.50-0 .80 ,Chromium,Cr: ≤ 0.25 ,Ni-Ni: ≤ 0.30,Copper Cu: ≤ 0.25
Mechanical Properties:
Tensile strength σb (MPa): ≥ 570
Yield strength σs (MPa): ≥ 335
Elongation δ5 /(%): ≥ 19
Reduction of area ψ /(%): ≥ 45
Impact energy (Aku2 / J): ≥ 47
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