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Gear Steel 42CrMo

Gear Steel 42CrMo
Product Detailed
Related Categories:Steel Sheets

Name: gear steel 42CrMo

Standard: GB / T 3077-1988

Gear steel 42CrMo Features and Scope:
Strength, hardenability, good toughness, when small deformation hardening, high strength and creep rupture strength at high temperatures. Required for the manufacture of higher intensity than the 35CrMo steel and tempered forgings larger cross-section, such as the big locomotive traction gears, supercharger drive gear, rear axle, greatly affected by the load rod and spring can also be used below 2000m deep oil drill pipe joints and fishing tools.

Gear Steel 42CrMo chemical composition:

C

Si

Mn

S

P

Cr

Ni

Cu

Mo

0.380.45

0.170.37

0.500.80

0.035

0.035

0.901.20

0.030

0.030

0.150.25

Gear 42 crmo steel mechanical properties:
Tensile strength of sigma b (MPa) : 1080 (110) or higher
Yield strength sigma s (MPa) : 930 (95) or higher
Elongation delta (%) : 12 or more
Reduction of area bits (%) : 45 or higher
Impact energy Akv (J) : p. 63
Impact toughness values of alpha kv (J/cm2) : 78 (8) or higher
Hardness: 217 hb or less
Sample size: blank sample size is 25 mm

Heat treatment specification and metallographic organization:
Heat treatment specification: 850 ℃ quenching oil cooling; 560 ℃ tempering, water cooling, oil cooling.

Metallographic organization: tempered sorbite.
Delivery status: by heat treatment (normalizing, annealing and high temperature tempering) or heat treatment state delivery, delivery status should be indicated in the contract.



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