galvanized steel coil
Looking for reliable galvanized steel coil suppliers in China? You've come to the right place. As a direct factory with 20 years of structural steel experience, GNEE Steel provides high-quality products at factory prices. In this guide, we'll focus on the chemical composition of S550GD galvanized steel coil and explain its material code 1.0531.
Galvanized steel is steel coated with zinc to resist corrosion. It's widely used in construction, automotive, and electrical industries. Common galvanized steel grades include DX51D, S350GD, and S550GD, each with unique properties for different applications.
Galvanized steel coil
What is S550GD and 1.0531 Material?
S550GD is a high-strength galvanized steel grade. The "550" represents its minimum yield strength of 550 MPa, and "GD" stands for general structural use.
1.0531 is the EN (European Standard) material number for S550GD. This code ensures consistency in material quality across manufacturers. It defines the exact chemical composition and mechanical property requirements, making it easy for buyers to identify the right material.
Detailed Chemical Composition Table of S550GD (1.0531)
The chemical composition of S550GD (1.0531) directly affects its performance. Below is the standard composition range:
| Element | Content (Max. %) | Role in Steel Performance |
|---|---|---|
| Carbon (C) | 0.12 | Enhances strength; controlled to avoid brittleness |
| Silicon (Si) | 0.50 | Improves oxidation resistance and strength |
| Manganese (Mn) | 1.60 | Boosts tensile strength and hardenability |
| Phosphorus (P) | 0.030 | Restricted to prevent cold brittleness |
| Sulfur (S) | 0.025 | Limited to reduce hot cracking during processing |
| Aluminum (Al) | 0.015 (Min.) | Refines grain structure for better formability |
| Zinc (Zn) | Coating: 60-275 g/m² | Provides corrosion protection as the outer layer |
S550GD Steel Mechanical Properties
In addition to its excellent chemical composition, our S550GD galvanized steel also has outstanding mechanical properties:
| Property | Metric | Imperial |
| Tensile Strength | 550-620 MPa | 79.8-89.9 ksi |
| Yield Strength | ≥ 550 MPa | ≥ 79.8 ksi |
| Brinell Hardness | 150-190 HB | 150-190 HB |
| Rockwell Hardness | 80-90 HRB | 80-90 HRB |
| Vickers Hardness | 160-200 HV | 160-200 HV |
| Elongation | 15-20% | 15-20% |
| Elastic Modulus | 210 GPa | 30,500 ksi |
| Fracture Elongation (≤ 0.7mm) | ≥ 12% | ≥ 12% |
| Fracture Elongation (> 0.7mm) | ≥ 14% | ≥ 14% |
| Coating Adhesion (Bend Radius) | 0T-2T (0-2x thickness) | 0T-2T (0-2x thickness) |
How Chemical Composition Affects S550GD Performance
Each element in S550GD (1.0531) plays a key role in its overall performance.
- Carbon: Higher carbon content increases strength but may reduce weldability. The 0.12% max limit balances strength and workability.
- Manganese: Up to 1.60% Mn improves strength without excessive brittleness, ideal for structural applications.
- Phosphorus and Sulfur: Strictly controlled to ensure the steel maintains good ductility and processing properties.
- Aluminum: Acts as a deoxidizer, improving the steel's cleanliness and mechanical stability.
GNEE Steel's S550GD Product Specifications
We offer S550GD galvanized steel coils with flexible dimensions to meet various project needs:
| Specification | Available Range |
|---|---|
| Thickness | 0.8-6.0 mm |
| Width | 900-1800 mm |
| Coil Weight | 3-25 tons |
| Coating Type | Hot-dip galvanized (HDG) |
| Surface Finish | Regular spangle, minimized spangle |
Understanding the chemical composition of S550GD galvanized steel coil (1.0531 material) helps you choose the right product for your project. Contact GNEE Steel today to get a customized quotation and technical support for your S550GD requirements!
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Galvanized steel coil