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| Technical Parameter | Specification & Manufacturing Details |
| Product Name | Zinc-Aluminum-Magnesium Steel Coil (Extreme Heavy-Duty ZAM / ZM Coil) |
| Alloy Coating Mass | ZM275 Grade ($275text{g/m}^2$ Double-Sided Total Coating Weight — Extreme Protection) |
| Coil Surface Finish | Smooth Satin Matte / Regular Spangle Texture (High Hardness & Severe Friction Resistance) |
| Executive Standards | Fully compliant with EN 10346, ASTM A1046, and GB/T 36702 |
| Available Base Grades | S350GD+ZM, S420GD, S450GD, S550GD (Ultra-High Strength Structural Grades) |
| Thickness Range | 1.0mm - 6.0mm (Heavy-Gauge Cold-Reduced / Hot-Rolled Substrate Profiling) |
| Width Range | 600mm - 1600mm (Professional Precision Longitudinal Slitting and Trimming Available) |
| Edge Protection Feature | Unrivaled "Self-Healing" Cut-Edge Corrosion Shielding (Severe Environment Sealing) |
| Coil ID & Delivery Weight | Inner Diameter: 610mm / 762mm | Unit Coil Weight: 5 - 25 Metric Tons |
| Grade Designation | Base Metal Thickness (mm) | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (≥%) | Salt Spray Test Resistance (Hours) | Cut-Edge Self-Healing Performance |
| S350GD + ZM275 | 1.0 - 6.0 | ≥ 350 | ≥ 420 | ≥ 16 | ≥ 4,000 Hrs (No Red Rust) | Maximum / Automatic Dense Sealing |
| S420GD + ZM275 | 1.0 - 6.0 | ≥ 420 | ≥ 480 | ≥ 14 | ≥ 4,000 Hrs (No Red Rust) | Maximum / Automatic Dense Sealing |
| S550GD + ZM275 | 1.0 - 4.5 | ≥ 550 | ≥ 560 | - | ≥ 4,000 Hrs (No Red Rust) | Maximum / Automatic Dense Sealing |
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