Wanzhi Group produces hot dip galvanized steel in accordance with EN 10346 Technical Standard for Hot Dip Galvanized Steel Sheets and Strips，EN 10346 GI steel is the European standard for continuously hot-dip coated steel flat products, specifying requirements for:Base material composition， Coating types (Zinc, Zinc-Aluminum, Zinc-Magnesium)，Mechanical properties，Dimensional tolerances (thickness, width, flatness)，Surface quality classifications.
EN 10346 GI Steel – Wanzhi Steel
EN 10346 applies to hot-dip galvanized (GI), zinc-aluminum alloys (AZ, e.g. Galvalume), zinc-magnesium alloys (ZM, e.g. ZAM®), etc., of which the GI steel sheet is the most basic and widely used one, and the hot-dip grades are DX51D+Z, S350GD+Z, etc. The GI steel sheet is also available as a hot-dip galvanized steel sheet.
Base Steel Chemical Composition
| Element | DX51D | S350GD | HX380LAD |
| C | ≤0.12% | ≤0.20% | ≤0.10% |
| Mn | ≤0.60% | ≤1.70% | ≤1.50% |
| P | ≤0.025% | ≤0.025% | ≤0.025% |
| S | ≤0.025% | ≤0.025% | ≤0.015% |
Mechanical Properties
| Grade | Yield Strength (ReH) | Tensile Strength (Rm) | Elongation (A80mm) |
| DX51D | ≥140 MPa | 270–500 MPa | ≥22% |
| S220GD | ≥220 MPa | 340–420 MPa | ≥14% |
| S350GD | ≥350 MPa | 420–520 MPa | ≥12% |
| HCT600X | ≥600 MPa | 650–750 MPa | ≥7% |
Dimensional Tolerances
| Parameter | Tolerance Range |
| Thickness | ±0.03mm (≤0.5mm) to ±5% (>3mm) |
| Width | +5/-0 mm (slit edges) |
| Coating Mass | ±15% (e.g., Z275 = 248–302 g/m²) |
| Flatness | ≤1.5mm/m (Class A) |
Top 5 Commercial Grades & Applications
| Grade | Coating | Key Applications |
| DX51D+Z | Z100-Z350 | Roofing, HVAC ducts, appliances |
| S320GD+AZ | AZ150 | Solar mounting, industrial roofing |
| S550GD+ZM | ZM110 | Truck trailers, offshore structures |
| HX420LAD+Z | Z75 | Automotive chassis, seat frames |
| HCT780XD+Z | Z90 | Crane booms, hydraulic cylinders |
Comparison of different coatings
| Feature | GI | GL | ZAM |
| Corrosion Resistance | ★★★☆☆ | ★★★★☆ | ★★★★★ |
| Heat Resistance | 200°C | 315°C | 400°C |
| Cost | Lowest | Medium | Highest |
Advantages of EN 10346 GI Steel
Salt spray life: 600-1500 hours
Self-repairing: Zinc protects the steel
Processability: Bending, welding, painting
Cost-effectiveness: Lightweight, low maintenance and use costs
Manufacturing Capabilities at Wanzhi Group
Wanzhi Group‘s factory produces 20,000 tons of EN 10346 GI steel and 10,000 tons of GL/ZAM steel per month. We provide OEM, ODM, QC, samples, solutions, further processing and other services.
Our EN 10346-certified production includes:
Coating Lines: 2 CGLs with 600,000 MT/year capacity
Thickness: 0.12–10.0 mm
Width: 600–1,600 mm
Special Services:
- Skin-pass rolling (matte/smooth surfaces)
- Leveling (flatness ≤1mm/m)
- Anti-fingerprint treatment
- prepainted
- Forming
Global Grade Cross-Reference
| EN 10346 | ASTM A653 | JIS G3302 | GB/T 2518 |
| DX51D+Z | CS Type B | SGCC | DX51D+Z |
| S350GD+AZ | SS Grade 50 | SGH440 | S350GD+AZ |
| HX420LAD+Z | HSLAS-F 420Y | SAPH440 | HC420/780DP |
EN 10346 GI Steel Industry Applications
| Sector | Component | Recommended Grade |
| Construction | Warehouse roofs | S280GD+AZ150 |
| Automotive | Seat reinforcements | HX340LAD+Z80 |
| Energy | Solar tracker frames | S320GD+ZM110 |
| Appliances | Refrigerator backs | DX52D+Z140 |
| Agriculture | Grain silo panels | S250GD+Z200 |
Why Choose Wanzhi’s EN 10346 GI Steel?
Buying EN 10346 GI Steel from Wanzhi Group, you not only get one-stop service, premium steel materials, but also competitive price and personalized solutions.
Services
- Quality certificates: ISO 9001, CE marking,
- Delivery time: 5-45 days for standard grades
- Test report: Test report (MTC, compliant with EN 10204 3.1) is provided with every batch of products.
Customer Feedback
See what Azerbaijan steel wholesalers, Chilean roofing sheet manufacturers, Brazilian wall panel manufacturers, UAE piping system manufacturers, Singapore purlin manufacturers have to say about our galvanized steel, PPGI steel, Aluminum zinc plated steel, ZAM steel.
Projects
We are involved in international construction and industrial projects such as commercial hospitals, industrial plants warehouses, greenhouses and many more. We offer a wide range of steels and accessories for your projects, so get in touch with us!
Wanzhi Steel – Agricultural Greenhouse Project in Turkmenistan
550 tons PPGI Steel Coil to Azerbaijan
100 tons of Galvanized Coils to Saudi Arabia
144 ton Steel Wire to Spanish
Project of PPGI Roofing en Libya
100 tons of GL and PPGL in Solomon Islands
EN 10346 GI Steel is a galvanized steel sheet with a pure zinc coating, which has become a popular material in the construction, automotive and energy sectors due to its cost-effectiveness, proven technology and traceable quality control system.