🟧 Product Overview
Zinc‑Aluminum‑Magnesium steel coil (ZAM / ZM) is the third‑generation anti‑corrosion steel, coated with a high‑performance alloy typically containing:
- Zn (90–93%)
- Al (5–8%)
- Mg (1–3%)
Compared with HDG and Galvalume, ZAM provides:
- 5–20× higher corrosion resistance
- Superior cut‑edge protection
- Outstanding durability in salt‑spray environments
- Longer service life in coastal and industrial regions
ZAM is widely used in solar structures, guardrails, agriculture, coastal buildings, and high‑corrosion industrial applications.
🟧 International Standards
EN 10346（Europe）
- ZM90 / ZM120 / ZM150 / ZM200
- DX51D+ZM / DX52D+ZM / DX53D+ZM
Japan (Nippon Steel / JFE)
- ZAM® (proprietary grade)
- Equivalent to ZM120–ZM200 performance
China (GB/T)
- Zn‑Al‑Mg coated steel (industry standard)
🟧 Global ZAM Coating Matrix
| Coating | Coating Mass (g/m²) | Typical Use |
|---|
| ZM90 | 90 g/m² | Indoor, general use |
| ZM120 | 120 g/m² | Outdoor, structural |
| ZM150 | 150 g/m² | Coastal, industrial |
| ZM200 | 200 g/m² | Extreme corrosion environments |
🟧 Base Steel Grade Matrix
| Standard | Grade | Description | Formability |
|---|
| EN 10346 | DX51D+ZM | General forming | ★★★ |
| EN 10346 | DX52D+ZM | Drawing quality | ★★★★ |
| EN 10346 | DX53D+ZM | Deep drawing | ★★★★★ |
🟧 Zn‑Al‑Mg Coating Structure (3rd‑Generation Alloy)
The coating consists of:
- Zinc matrix – sacrificial protection
- Aluminum – barrier protection
- Magnesium – enhances self‑healing and cut‑edge protection
- Intermetallic phases – improve abrasion and corrosion resistance
This alloy provides:
- Exceptional corrosion resistance
- Strong adhesion
- Excellent paintability
- Superior durability in harsh environments
🟧 Product Specifications
Dimensions
- Thickness: 0.25 – 2.0 mm
- Width: 600 – 1500 mm
- Coil ID: 508 / 610 mm
- Coil Weight: 3 – 10 MT
Surface Finishes
- Smooth
- Zero spangle
- Anti‑finger coating (AFC)
- Chromated / Non‑chromated
- Oiled / Dry
- Skin‑passed
🟧 Mechanical Properties (typical)
| Grade | Yield Strength | Tensile Strength | Elongation |
|---|
| DX51D+ZM | 140–300 MPa | 270–500 MPa | ≥ 22% |
| DX52D+ZM | 140–260 MPa | 270–420 MPa | ≥ 26% |
| DX53D+ZM | 120–220 MPa | 260–380 MPa | ≥ 30% |
🟧 ZAM vs. Galfan vs. Galvalume vs. HDG (Flagship Comparison)
| Property | ZAM (Zn‑Al‑Mg) | Galfan (ZA) | Galvalume (AZ) | HDG (Zinc) |
|---|
| Corrosion Resistance | ★★★★★ | ★★★★ | ★★★★ | ★★★ |
| Cut‑Edge Protection | ★★★★★ | ★★★★★ | ★★★ | ★★ |
| Abrasion Resistance | ★★★★★ | ★★★★★ | ★★★ | ★★ |
| Salt‑Spray Performance | ★★★★★ | ★★★★ | ★★★★ | ★★ |
| Best Use | Coastal, industrial, solar | Coastal, roofing | Roofing, outdoor | Structural |
🟧 Applications
Solar Energy
- Solar mounting systems
- Solar brackets
- Photovoltaic structures
Construction
- Coastal buildings
- Roofing and wall panels
- Structural components
Industrial
- Chemical plants
- Industrial equipment
- HVAC systems
Agriculture
- Greenhouses
- Animal housing
- Ammonia‑rich environments
Transportation
- Guardrails
- Highway safety systems
🟧 Why Choose Zinc‑Aluminum‑Magnesium Steel Coil
- 5–20× corrosion resistance vs. galvanized steel
- Exceptional cut‑edge protection
- Outstanding durability in salt‑spray environments
- Long service life in coastal and industrial regions
- Ideal for solar, structural, and high‑corrosion applications
🟧 Why Choose WelSteels
- Full range of ZM coatings (ZM90–ZM200)
- Stable mechanical and surface quality
- Advanced Zn‑Al‑Mg coating lines
- SGS / BV inspection available
- Export‑grade seaworthy packaging
- Reliable delivery for global projects
