20CrMo steel gears

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11-May-2024

can be a good machinability and cold plastic strain. KUNFENG as a supplier in china, more information about , please see the following:

Name:
Standard: GB / T 3077-1988
Corresponds to the standard: JIS G4053: 2003 ASTM A29M: 2005 ISO 683-18:1996

20CrMo gear steel chemical composition:

C	Si	Mn	S	P	Cr	Ni	Cu	Mo
0.17～0.24	0.17～0.37	0.40～0.70	≤0.035	≤0.035	0.80～1.10	≤0.030	≤0.030	0.15～0.25

20CrMo gear steel mechanical properties:
Tensile strength σb (MPa): ≥ 885 (90) Yield strength σs (MPa): ≥ 685 (70)
Elongation δ5 (%): ≥ 12 Reduction of area ψ (%): ≥ 50
Impact energy Akv (J): ≥ 78 Impact toughness values αkv (J/cm2): ≥ 98 (10)
Hardness : ≤ 197HB Sample size: Sample size is 15mm rough

Heat treatment and microstructure specifications
Heat treatment specifications: quenching 880 ℃, water, oil cooling ; tempering 500 ℃, water, oil cooling .

20CrMo material belonging to a low-carbon alloy steel for carburizing ; treatment specifications : quenching 880 ℃, water, oil cooling ; tempering 500 ℃, water, oil cooling 20CrMo quenching (860-880 ℃ cold water or oil ) . plus low temperature (150 - 200 ℃) tempered , 20CrMo hardness HRC32-33.

Range gear steel 20CrMo characteristics and application: high hardenability , temper brittleness , very good weldability , cold cracking tendency to form small, can be a good machinability and cold plastic strain . Usually in the quenched state or carburizing used for the manufacture of infiltration in non-corrosive media and working temperatures below 250 ℃, pressure pipe and various fasteners containing nitrogen and hydrogen mixture of media work , more advanced carbon parts, such as gears , shafts , etc.