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ASTM 4720H

2020-04-15 19:24:08
     
Steel Grade : ASTM 4720H
Tpye : Anti friction bearing carburizing steel①(ASTMA534—1994)
     
CHEMICAL COMPOSITION    
C(%) : 0.17~0.23
Si(%) : 0.15~0.35
Mn(%) : 0.45~0.75
P(%)≤ : 0.025
S(%)≤ : 0.025
Cr(%) : 0.30~0.60
Mo(%) : 0.15~0.25
Ni(%) : 0.85~1.25
Other(%) :
     
     
Remark:    
①, The steel grade is AISI/SAE series, the content have been adjusted for P, S and  individual Si.
②, It should have the following elements in steel if not specified: Cr≤0.20%,Mo≤0.10%,Ni≤0.25%,Cu≤0.35%.
③, The whole aluminum and oxygen content should be the following:Alt≤0.050%,O2≤0.0015%.
     


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