42crmo 35crmo q195 q235 Steel Round Bar Mild Carbon Steel Billet 4140 s45c s55c s35c 5sp/3sp Sectio
Discover the versatile 42CrMo, 35CrMo, Q195, Q235 Steel Round Bar and Mild Carbon Steel Billet, including 4140, S45c, S55c, S35c variants. Ideal for structural parts, molds, and shafts, these high-quality steel bars meet ASTM, AISI, JIS, and GB standards. Perfect for construction, automotive, and machinery applications.