Corrosion-Resistant Cold-Hardened Steel Coils from China Suppliers and Factory - Ultra-Fine Grain, High Strength

Our products, manufactured in China using advanced Sendzimir mills, undergo cold reduction (50–95% draft) to produce coils with ultra-fine grain sizes (ASTM 10–12). This process ensures severe plastic deformation, enhancing the strain-hardening mechanism and achieving a tensile strength of 1,200 MPa while preserving elongation rates between 3% and 8%. As leading suppliers in the industry, we implement proprietary annealing cycles at temperatures ranging from 650–750°C in H₂/N₂ atmospheres, which stabilize the microstructure and guarantee a hardness level of HRB 70–100 with a tolerance of ±2 HRB. Trust our factory for high-quality metal solutions that meet stringent specifications.