ASTM 4130 Steel round bar is a kind of structural alloy steel round bar under ASTM A29/A29M-04 standard. Equivalent material for ASTM4130 is 30CrMo(China), SCM430(SCM2)(Japanese), 34CrMo4(1.7220)(Germany).
Stainless steel is expensive steel that widely use in our life. ASTM A240 321 Stainless Steel sheet/plate has widely uses also. ASTM A240 321 Stainless Steel sheet/plate is one kind of stainless steel.
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