G500 Steel Grades
High-Strength Galvanized Structural Steel for Roofing, Framing & Industrial Applications
- Technical Support
G500 Steel Technical Specifications & Applications
G500 Steel is a high-strength structural steel with a minimum yield strength of 500 MPa, offering an optimal balance of strength, toughness, and formability. It is widely used in structural framing, purlins, heavy-duty roll-formed sections, and load-bearing components.
With excellent weldability and cold-forming performance, G500 Steel is ideal for bending, cutting, stamping, and roll-forming. Manufactured under strict quality control, it meets international standards, ensuring reliable performance in galvanized and structural steel applications.
As a core product of Hengze Steel Group, G500 Steel is trusted globally for durable, high-performance galvanized structural steel solutions in construction, engineering, and manufacturing.
Table of Contents
1. Typical Uses & Selection Guidance
- Structural Applications G500 steel is a high-strength structural steel grade with a minimum yield strength of 500 MPa, offering an exceptional balance of strength, toughness, and formability. It is widely utilized in applications requiring superior load-bearing capacity and durability, such as structural framing, purlins, and heavy-duty roll-formed sections.
- Corrosion Protection When hot-dip galvanized or metallic-coated (Zinc, Zinc-Aluminium), G500 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 G500 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) |
|---|---|---|---|---|---|---|
| G500 | 0.20 | 1.20 | 0.040 | 0.030 | 0.025 | 0.060 |
2. Mechanical Property Requirements (Maximum Values)
| Steel Grade | Min. Yield Strength (MPa) | Min. Tensile Strength (MPa) | Min. Elongation (%) Lo=50mm | Min. Elongation (%) Lo=80mm | Bend Angle (°) | Mandrel Diameter (× Thickness t) |
|---|---|---|---|---|---|---|
| G500 | 500 | 520 | 2 | 7 | 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) | 100% 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. G500 vs G550 — What’s the Difference?
| Property | G500 Steel | G550 Steel |
|---|---|---|
| Yield Strength | Minimum 500 MPa | Minimum 550 MPa |
| Tensile Strength | Approximately 520 MPa | Approximately 550 MPa |
| Elongation (50mm) | Minimum 2% | Minimum 2% |
| Bendability | Suitable for 180° bends with 4t mandrel | Suitable for 180° bends with 4t mandrel |
G500 Steel FAQ：
G500 steel is a high-strength hot-dip galvanized structural steel with a minimum yield strength of 500 MPa. It is engineered for applications that require superior load-bearing capacity, excellent formability, and corrosion resistance. Typical uses include roll-formed structural components, house framing, agricultural posts, and trellises.
G500 steel offers robust mechanical performance suitable for demanding structural applications:
Yield Strength: Minimum 500 MPa
Tensile Strength: Approximately 520 MPa
Elongation (50mm gauge length): Minimum 2%
Elongation (80mm gauge length): Minimum 7%
Bendability: Supports 180° bends with a mandrel diameter of 4 × thickness (4t)
These properties ensure structural reliability, high strength-to-weight ratio, and excellent performance during cold forming and fabrication.
G500 steel is widely used in construction and industrial applications where strength and durability are critical:
Structural Sections: Beams, channels, purlins, and columns requiring high strength
House Framing: Lightweight yet strong structural support for residential buildings
Agricultural Posts & Fencing: Durable posts for farms, vineyards, and orchards
Trellises & Garden Structures: Strong frameworks supporting plants and crops
These applications benefit from G500 steel’s high strength, ductility, and corrosion resistance.
To enhance durability and corrosion resistance, G500 steel is available with multiple hot-dip metallic coatings:
Zinc (Z): 100% Zinc coating, basic corrosion protection
Zinc-Aluminium (ZA): 95% Zinc, 5% Aluminium, improved corrosion resistance
Zinc-Iron (ZF): Zinc with iron alloy, enhanced hardness and wear resistance
Zinc-Magnesium (ZM): Zinc with 2–4% Mg, 5–13% Al, superior corrosion resistance for harsh environments
Aluminium-Zinc (AZ): 55% Aluminium, 43.5% Zinc, 1.5% Silicon, excellent corrosion resistance and heat reflectivity
Aluminium-Magnesium (AM): Aluminium with Magnesium alloy, high corrosion resistance and high-temperature suitability
These coatings make G500 steel ideal for roofing, cladding, structural components, and outdoor industrial applications.
