Supply Fully customizable rough machined gear forging for gear manufacture
We supply quality gear forging (forged steel gear blanks) for gear manufacture.
We can use open-die forging or closed-die forging to produce the gear forgings for you. We can also manufacture and supply the forged steel gear forgings depending on the standard and your needs.
Common gear forging steel material
Low-alloy steel, brass, aluminum alloys, stainless steel, titanium, and some heat-resistant alloys are the popular raw material for gears manufacture.
Overall, steel is the most frequent material. Steel is frequently used because it combines a high strength-to-weight ratio, good wear resistance, the ability to improve physical qualities through heat treatment, and competitive pricing.
Gear forgings come in a variety of shapes and sizes. 40Cr, 42CrMo, 20CrMnMo, 20CrMnTi, and other materials are commonly utilized for gear forging. In the crane industry, 42CrMo and 40Cr forged gears are the most common steel for large-scale gear. 20CrMnMo and 20CrMnTi are commonly used in transmission machinery forging gears, primarily tiny parts.
The difference between 42CrMo and 40Cr
Because 42CrMo has better heat treatment hardenability, the toughness of 42CrMo is much better than that of 40Cr. When the hardness is the same, the strength of the two materials is very close. The tensile strength of 40Cr is 60~75kg/mm², and the yield strength is 35~55kg/mm². 42CrMo has a tensile strength of 110 kg/mm² and a yield strength of 95 kg/mm². Obviously, the mechanical properties of 42CrMo are much better than those of 40Cr. The performance of 42CrMo forged gears is better than that of 40Cr forged gears, especially the hardenability is higher than that of 40Cr steel gears. After quenching and tempering, the gear forgings of 42CrMo steel have high fatigue strength limit and multiple impact resistance, and have good low temperature impact toughness.
42CrMo Steel Chemical Elements and Mechanical Properties
In terms of material categorization, 42CrMo steel is an alloy structural steel with good mechanical properties and machinability. It is widely utilized as the gear forging steel.
Chemical composition
C：0.38～0.45%
Si：0.17～0.37%
Mn：0.50～0.80%
S ： Allowable residual content≤0.035%
P ： Allowable residual content≤0.035%
Cr：0.90～1.20%
Ni： Allowable residual content≤0.30%
Cu：Allowable residual content≤0.30%
Mo：0.15～0.25%
Mechanical Properties:
Hardness: Annealed, 147~241HB, 42CrMo
42CrMo mechanical properties:
Tensile strength σb (MPa): ≥1080(110)
Yield strength σs (MPa): ≥930(95)
Elongation δ5 (%): ≥12
Area shrinkage ψ (%): ≥45
Impact energy Akv (J): ≥63
Impact toughness value αkv (J/cm2): ≥78(8)
Hardness: ≤217HB
Equivalent Grade
- ГOCT 38XM、
- AISI 4140/4142、
- BS 708M40/708A42/709M40、
- NF 40CD4/42CD4、
- DIN 41CrMo4/42CrMo4、
- JIS SCM4、
- ISO 683/1 3
Gear forging professional manufacturer Jiangsu Weirun Forging
Founded in 2001, Jiangsu Weirun Forging Co,. ltd is composed of Jiangsu Longtai Alloy Technology Co., Ltd., Jiangsu Xinya New Material Co., Ltd. and Shanghai Far Well Trade Co., Ltd. It is an leading enterprise involved in gear forging and forged steel blanks.
Jiangsu Weirun Forging Co ,. ltd is mainly engaged in the production and supply of alloy steel smelting, electroslag remelting, forging, heat treatment and rough machining. After years of development, Jiangsu Weirun Forging Co,. ltd has formed a complete industrial chain of material recovery, smelting, electroslag casting, forging, heat treatment and rough machining. The company is located in Danyang City Jiangsu Province, which is about 200KM away from Shanghai.
Company View
Contact our support team
Jiangsu Weirun Forging Co., ltd
- Steve Wei Sales Manager
- +86-183-1708-9408
- +86-183-1708-9408
- +86-0511-86360978
- steve@well-forge.com