S220GD Steel Grades
Durable Hot-Dip Galvanized Structural Steel with EN 10346 Compliance
- Technical Support
S220GD Steel Technical Specifications & Applications
S220GD is a hot-dip galvanized structural steel grade compliant with EN 10346, featuring a minimum yield strength of 220 MPa. It offers an optimal balance of strength, formability, and corrosion resistance, making it suitable for various applications in construction and manufacturing.
This steel grade is widely used in structural framing, purlins, and light-duty roll-formed sections. Its excellent weldability and cold-forming properties allow for efficient processing in bending, cutting, stamping, and roll-forming operations.
Manufactured under stringent quality controls, S220GD meets international standards, ensuring reliable performance in galvanized and structural steel applications.
As a core product of Hengze Steel Group, S220GD is trusted globally for durable, high-performance galvanized structural steel solutions in construction, engineering, and manufacturing sectors.
Table of Contents
1. Typical Uses & Selection Guidance
- Structural Applications
S220GD is a hot-dip galvanized structural steel grade compliant with EN 10346, featuring a minimum yield strength of 220 MPa. It offers an optimal balance of strength, formability, and corrosion resistance, making it suitable for various applications in construction and manufacturing.
- Corrosion Protection
When hot-dip galvanized or metallic-coated (Zinc, Zinc-Aluminium), S220GD provides reliable corrosion resistance for roofing, wall cladding, gutters, and general building applications, particularly in mild to moderate environments. The zinc coating offers a robust barrier against corrosion, extending the life of the steel.
- Forming Advantages
The higher yield strength of S220GD allows for easier bending, tighter radii, and reduced risk of cracking, making it ideal for complex profiles, detailed fabrication, and applications requiring superior formability.
2. Technical Specifications Table
1. Chemical Composition Requirements (Maximum %)
| Steel Grade | Carbon (C) | Manganese (Mn) | Phosphorus (P) | Sulfur (S) | Silicon (Si) | Aluminum (Al) |
|---|---|---|---|---|---|---|
| S220GD | ≤ 0.20 | ≤ 1.70 | ≤ 0.10 | ≤ 0.045 | ≤ 0.60 | — |
2. Mechanical Property Requirements (Maximum Values)
| Steel Grade | Min. Yield Strength (MPa) | Min. Tensile Strength (MPa) | Min. Elongation (%) Lo=80mm | Bend Angle (°) | Mandrel Diameter (× Thickness t) |
|---|---|---|---|---|---|
| S220GD | ≥ 220 | ≥ 300 | ≥ 20 | 90 | 6t |
3. Coating Adhesion (180° Bend Test) Requirements
| Coating Class | Mandrel Diameter (× Thickness t) |
|---|---|
| Z100, Z200 | 1t |
| Z275, Z350, Z450, AZ150, AZ200, AM100, AM125, AM150, AM175, AM200, AM225 | 2t |
| Z600 | 3t |
4. Applicable Hot-Dip Metallic Coating Types
| Coating Class | Composition (%) | Key Features |
|---|---|---|
| Z (Zinc) | ≥99% Zinc | Basic corrosion protection; suitable for general use. |
| ZA (Zinc-Aluminium) | 95% Zn, 5% Al | Improved corrosion resistance over pure zinc. |
| ZF (Zinc-Iron) | Zinc with iron alloy | Enhanced hardness and wear resistance. |
| ZM (Zinc-Magnesium) | Zn with 2–4% Mg, 5–13% Al | Superior corrosion resistance in harsh environments. |
| AZ (Aluminium-Zinc) | 55% Al, 43.5% Zn, 1.5% Si | Excellent corrosion resistance and heat reflectivity. |
| AM (Aluminium-Magnesium) | Al with Mg alloy | High corrosion resistance; suitable for high-temperature applications. |
3. S200GD vs S250GD — What’s the Difference?
| Property | S220GD Steel | S250GD Steel |
|---|---|---|
| Yield Strength | Minimum 220 MPa | Minimum 250 MPa |
| Tensile Strength | Approximately 300–400 MPa | Approximately 330–430 MPa |
| Elongation (80mm) | Minimum 20% | Minimum 19% |
| Bendability | Suitable for 180° bends with 6t mandrel | Suitable for 180° bends with 6t mandrel |
G220 Steel FAQ：
S220GD is a hot-dip galvanized structural steel grade compliant with EN 10346, featuring a minimum yield strength of 220 MPa. It offers an optimal balance of strength, formability, and corrosion resistance, making it suitable for various applications in construction and manufacturing.
S220GD steel exhibits a minimum yield strength of 220 MPa, a tensile strength ranging from 300 to 440 MPa, and an elongation at break of at least 20%. These properties ensure reliable structural integrity and formability for various applications.
S220GD is widely used in structural framing, purlins, and light-duty roll-formed sections. Its excellent weldability and cold-forming properties allow for efficient processing in bending, cutting, stamping, and roll-forming operations.
S220GD steel is offered with multiple metallic coatings to enhance corrosion resistance for different environments:
Z (Zinc): Standard corrosion protection
ZA (Zinc-Aluminium): Improved corrosion resistance
ZF (Zinc-Iron): Enhanced hardness and wear resistance
ZM (Zinc-Magnesium): Superior protection in harsh conditions
AZ (Aluminium-Zinc): Excellent corrosion resistance and heat reflectivity
These coatings make S220GD suitable for roofing, wall cladding, gutters, and other structural applications in mild to moderate environments.
