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ASTM A229

2020-04-08 09:14:22
     
Specification and Steel Grade : ASTM A229
Type : High-Carbon Steel
     
Main Chemical Compositions|(%) : C0.55~0.85,Mn0.30~1.20
     
Strength of Extension|σb/MPa : I grade:1140~2020,II grade:1320~2330
Elasticity Modulus|E/GPa : 210
Torsional Property|σb Min(%) : 45
Rigidity Modulus|G/GPa : 80
Hardness|HRC : 42~55
Working Temperature|/℃ : 120
Features and Use : Used for general purposes of spring,need heat treatment before produce
     
Remark:    
①, For helical compression  spring or tension spring, the distorting stress should be 75% of σb minimum.
②, It is the United States federal specification.
     
     


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