Z275 galvanized steel coil
Z275 galvanized steel coil is a cold-rolled steel sheet treated by hot-dip galvanizing process, with a zinc layer weight of 275g/㎡ (double-sided), and has excellent anti-rust and corrosion resistance.
As a core material in the fields of construction, home appliances, automobile manufacturing, etc., its high cost performance and long life are widely recognized by the market.
As a high-end galvanized product that meets international standards, this product adopts advanced continuous hot-dip galvanizing process, and the zinc layer weight is strictly controlled at 275g/m² (double-sided), which can maintain an effective anti-corrosion period of more than 10 years in harsh environments.
Zinc layer thickness: 275g/m² on both sides (180g/m² for conventional products in the industry)
Salt spray test: Passed 3000 hours of neutral salt spray test (ASTM B117 standard)
Service life: More than 40% longer than ordinary galvanized steel coils
| Surface type | Roughness (RA) | Applicable scenarios |
|---|---|---|
| Finished surface | 0.5-1.2μm | Home appliance panels, precision parts. |
| Zinc spangle surface | 1.5-2.5μm | Building exterior walls, industrial equipment. |
| Zinc spangle-free surface | ≤1.0μm | Automobile chassis, high-end decoration. |
Elongation ≥18% supports various processing methods such as stamping, bending, welding, etc., and the scrap rate is reduced by more than 30%.
Technical parameters and specifications comparison table
| Item | Parameter Range | Test Standard |
|---|---|---|
| Substrate Thickness | 0.3-3.0mm | ±0.03mm |
| Roll Weight | 5-15 tons/roll | Electronic floor scale measurement |
| Hardness (HV) | 80-180 | Vickers hardness tester |
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Purchase decision guide
1. Clarify the three elements of demand
Usage environment: It is recommended to choose Z275 in coastal areas and Z180 inland areas.
Processing method: DC04 grade deep drawing materials should be selected for stamping.
Surface requirements: Galvanized sheet coil is recommended to choose small zinc flower products for spraying treatment.
2. Certification system verification
Ensure that the supplier has the following certifications:
ISO 9001 quality management system
SGS material testing report
EU ROHS environmental certification
- Range available and production capacity
| Steel Grade | Coating | Yield(MPA) | Tensile(MPA) | Elongation(%) |
| DX51D | Z,ZF | -- | 270-500 | ≥20 |
| DX52D | Z,ZF | 140-300 | 270-420 | ≥22 |
| DX53D | Z,ZF | 140-260 | 270-380 | ≥26 |
| DX54D | Z,ZF | 140-220 | 270-350 | ≥30 |
| S220GD | Z,ZF | ≥220 | ≥300 | ≥18 |
| S250GD | Z,ZF | ≥250 | ≥330 | ≥17 |
| S280GD | Z,ZF | ≥280 | ≥360 | ≥16 |
| S320GD | Z,ZF | ≥320 | ≥390 | ≥15 |
| S350GD | Z,ZF | ≥350 | ≥420 | ≥14 |
| S400GD | Z,ZF | ≥400 | ≥470 | -- |
| S500GD | Z,ZF | ≥500 | ≥530 | -- |
| S550GD | Z,ZF | ≥550 | ≥560 | -- |