GB40030 (40Cr Form7)

Alloy Steel

40Cr Form7

Versatile low-alloy structural and engineering steel for demanding mechanical applications.

Chemical Composition (%)

C0.37
CR0.8
MN0.5

Mechanical Properties

Yield:525MPa; Tensile:825MPa; Elong:29%; 58HRC

Chinese Standard

GB/T 3077

Applications

Shafts, gears, axles, bolts, connecting rods, crankshafts, forgings

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