Chemical composition and mechanical properties of C20 seamless steel pipe
Chemical composition and mechanical properties of C20 seamless steel pipe
C : 0.17% ?0.23%
Si: 0.17% ?0.37%
Mn : 0.35% ?0.65%
Cr< 0.25%
Ni < 0.3%
Cu< 0.25%
[mechanical properties]
Sample blank size: 25mm
Recommended heat treatment normalizing 910 ° C
tensile strengthb》410MPa
yield strengthS>245MPa
Elongation after fracture 25%
Reduction of area book () > 55%
Hardness of steel in delivery state hbs10 / 3000, unheated steel < 156