20CrMoA Gear Steel Bar

 

20CrMoA alloy steel has higher hardenability, no temper brittleness, weldability is quite good, the formation of cold cracking tendency is small, machinability and cold strain plasticity good.

 

Generally quenched or hardened carburizing used in the manufacture of non-corrosive media and working temperature below 250 ℃, containing a mixture of nitrogen and hydrogen medium work in the high-pressure pipe and a variety of fasteners, the higher the infiltration Carbon parts, such as gears, shafts and more.

 

Chemical Composition:

 

CSiMnSPNiCrCuMo
0.17~0.240.17~0.370.40~0.70≤0.035≤0.035≤0.0300.80~1.10≤0.0300.15~0.25

 

Mechanical Properties:

 

Percentage reduction of area
ψ (％)

Tensile strength
σb/Mpa

Yield strength
σb/Mpa

Notched bar impact strength
αkv (J/cm2)

Impact energy
Akv J

Elongation
δ5%

Hardness
HB

≥50

≥885

≥685

≥98

≥78

≥12

≤179

 


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