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20CrMo Alloy Structural Steel

20CrMo Alloy Structural Steel

Place of Origin : China
Brand Name : XJS
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20CrMo steelcan be a good machinability and cold plastic strain.

Name: 20CrMo steel

Standard: GB / T 3077-1988
Equivalent grades: JIS G4053: 2003 ASTM A29M: 2005 ISO 683-18:1996

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

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:
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.

application:

high hardenability, no temper brittleness, excellent weldability, small cold cracking tendency, 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.



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