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GB/T 3077 42CrMo4 alloy steel
GB/T 3077 42CrMo4 alloy steel
Hardness: <=217HBW
Thermal processing Temperature1050-850
Heat Treatment: Annealed: 680-720°C
Normalized: 840-880°C
Quenched: 820-850°Cfor water, 830-860°C for oil
Tempered: 540-680°C42CrMo4 alloy steel Chemical composition %:
C
Si
Mn
P
S
Cr
Mo
0.38- 0.45
max 0.4
0.6 - 0.9
max 0.025
max 0.035
0.9 - 1.2
0.15 - 0.3
GB/T 3077 42CrMo4 Mechanical properties:
Yield
Rp0.2 (MPa)Tensile
Rm (MPa)Impact
KV/Ku (J)Elongation
A (%)252 (≥)
877 (≥)
24
14
GB/T 3077 42CrMo4 Applications:
GB/T 3077 42CrMo4 alloy steel Hardness: <=217HBW Thermal processing Temperature1050-850 Heat Treatment: Annealed: 680-720°C Normalized: 840-880°C Quenched: 820-850°Cfor water, 830-860°C for oil Tempered: 540-680°C 42CrMo4 alloy steel Chemical composition %:
To manufacture high strength and conditioning section part that request more than 35CrMo, such as locomotive traction gear, supercharger gear. Connecting rod and spring clip, can also be used for oil drill pipe joints below 2000m deep.