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Home  >  Import special steel  >  Gear steel
Product Details
Product Name: 40MnB gear steel
Product Type: 40MnB gear steel
Product Brand: Cutting Steel
On a: 20CrMnMo gear steel
Under a: 16MnCr5 gear steel
Product Description  

With high strength, hardness, wear resistance and good toughness, is a more successful replace 40Cr steel new steel grades. Used as a steering arm on the car, steering knuckle, steering shaft, axle, worm, spline shaft, brake adjustment arm, etc., can also be replaced by a larger section of 40Cr steel parts.
● Chemical Composition:
Carbon C: 0.37 ~ 0.44
Si Si: 0.17 ~ 0.37
Mn Mn: 1.10 ~ 1.40
Sulfur S: to allow the residual content ≤0.35
Phosphorus P: to allow the residual content ≤0.35
Chromium Cr: to allow the residual content ≤0.30
Ni: to allow the residual content ≤0.30
Cu: to allow the residual content ≤0.30
Boron B: 0.0005 ~ 0.0035
● Mechanical Properties:
Tensile strength σb (MPa): ≥980 (100)
Yield strength σs (MPa): ≥785 (80)
Elongation δ5 (%): ≥10
Reduction of ψ (%): ≥45
Impact energy Akv (J): ≥47
Impact toughness αkv (J / cm2): ≥59 (6)
Hardness: ≤207HB
Sample size: Sample size is 25mm rough
● Heat treatment and microstructure specifications:
Heat treatment specifications: quenching 850 ℃, oil cooling; tempering 500 ℃, water, oil cooling.
● Delivery status: to heat treatment (normalizing, annealing or tempering) or without heat treatment delivery, the delivery status should be specified in the contract.

Related products  
SAE8260H gear steel
18CrMnMoB gear steel
28MnCr5 gear steel
25MnCr5 gear steel
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