4130 Packing Machine Screw

A. Material: Astm4130 has high strength, toughness and hardenability B. Blank shape: Round steel, forging C. Heat treatment: Quenching + tempering D. Purpose: It is used for driving screw on…

4140 Packing Machine Screw

A. Material: Astm4140 has the advantages of high strength, high hardenability, good toughness and small deformation during quenching B. Blank shape: Round steel, forging C. Heat treatment: Quenching + tempering…

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