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ST15 Cold Rolled Steel Coil's superior performance stems from its precise chemical composition control and advanced cold rolling and annealing process. We strictly control the carbon content to ensure the material's extreme softness and, through optimized alloy element ratios, endow it with excellent machinability.
| Performance Index | Value Range | Unit | Performance Characteristics |
| Yield Strength (Re) | ≤ 180 | MPa | Extremely low yield strength ensures easy deformation of the material and reduces die wear |
| Tensile Strength (Rm) | 270 – 330 | MPa | Moderate tensile strength guarantees structural stability after forming |
| Elongation (A80mm) | ≥ 40 | % | Extremely high elongation provides the material with super plastic deformation capacity |
| Plastic Strain Ratio (r90) | ≥ 1.9 | - | Excellent deep drawing performance index, effectively resists material thinning and prevents cracking |
| Work Hardening Exponent (n90) | ≥ 0.20 | - | Good work hardening property improves the final strength of formed parts |
| Element | Content (%) | Key Function |
| Carbon (C) | ≤ 0.06 | Ensures ultra-low hardness and excellent cold workability of the material |
| Manganese (Mn) | ≤ 0.35 | Improves strength and toughness while maintaining good plasticity |
| Phosphorus (P) | ≤ 0.025 | Strictly controls impurities, reduces cold brittleness sensitivity and enhances stamping safety |
| Sulfur (S) | ≤ 0.020 | Reduces non-metallic inclusions, optimizes surface quality and deep drawing performance |
| Acid-soluble Aluminum (Alt) | ≥ 0.015 | Effectively deoxidizes, refines grains, and provides excellent non-aging properties |
Surface Quality: Available in FB (higher finish) and FC (high finish) grades.
Surface Texture: Available in matte (D) and glossy (B) finishes upon request.
Specification Range: Thickness 0.5 mm - 3.0 mm; width and length can be customized.
Delivery Condition: Cold rolled, annealed and skin-passed condition.
Address
No. 696, Binhai 12th RoadBinhai Industrial Park, Wenzhou Economic & Technological Development ZoneWenzhou, Zhejiang Province, P.R.China
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