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gb t 3077 40mn2 forging steel round bar - Mild Carbon

Description:GB T-3077 40MN2 Round bar, 40MN2 Bearing steel, 40MN2 GB T-3077 40MN2 standard applies to manufacture of bearing ring steel pipe rolling elements made by high-carbon chromium bearing steel processed with hot rolled forged round, steel wire, cold rolled.

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