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China Manufacturers Long Service Life Normalized 51CRV4 50crva Steel Strip. Wide Grade Selection: Includes 51CrV4, 62Si2MnA, 65Mn, SK85, and various spring/automotive steels. Advanced Processing: Equipped with Sendzimir mill, AGC rolling mills, and quenching/tempering lines. Custom Hardness Options: Offers Cold Hard (Hv: 200-280), Annealing, and Quenching/Tempering states. Mill Test Certificate: Available upon request to ensure material quality and traceability. Free Samples Available: Free samples provided for testing; customer only pays freight cost.