G550 Galvanized Steel Coil
SXY Steel Group manufactures premium EN 10346 S550GD / G550 structural hot-dip galvanized steel coils, specifically engineered for roll-forming high-tensile purlins, metal decking, and heavy-duty corrugated roofing profiles. Our G550 strips guarantee a minimum yield strength of 550 MPa, combined with strict mill-certified zinc coating mass uniformity (Z40 to Z275 g/m²).
Every production lot passes inline tension-leveling for flawless wave-free flatness, zero-T bending tests, and micro-accurate Elcometer zinc density monitoring. Secure your priority container mill capacity allocation today via our 2-hour rapid technical quoting channel before international steel flat-rolled indexes adjust.
Tired of slow factory email replies while your rigid structural project deadline or steel bidding window closes in? Eliminate raw material non-compliance risks and secure your verified G550 high-tensile test logs right now.
PRODUCT DETAILS
Structural High-Tensile Galvanized Steel Three-Standard Cross Matrix
| Global Grade Index | American Standard (ASTM) | European Standard (EN) | Japanese Standard (JIS) | Mechanical & Yield Properties |
|---|---|---|---|---|
| G550 / Full Hard | ASTM A653 SS Grade 80 | EN 10346 S550GD+Z | JIS G3302 SGCH | Yield Strength ≥ 550 MPa. Tensile Strength ≥ 570 MPa. Optimized carbon/silicon balance to prevent longitudinal tearing under rapid cold roll-forming lines. |
| G340 / S350GD | ASTM A653 SS Grade 50 Class 1 | EN 10346 S350GD+Z | JIS G3302 SGC440 | Yield Strength ≥ 350 MPa. Intermediate load structural grade optimized for standard light-gauge framing and commercial building purlins. |
| G250 / S250GD | ASTM A653 SS Grade 33 | EN 10346 S250GD+Z | JIS G3302 SGC340 | Yield Strength ≥ 250 MPa. High-ductility structural baseline engineered for complex geometry bending and deep corrugated industrial panels. |
• 100% Traceable Mill Certificates: All shipments include rigorous EN 10204 3.1 Mill Test Certificates (MTC) detailing absolute ladle chemistry analysis, clear yield-to-tensile boundaries, elongation properties, and zero-T bend adhesion validation. Fully open to independent auditing by SGS, Bureau Veritas, or Intertek.
• Financial Liquidity Protection: We fully eliminate cross-border transaction capital risks by supporting high-tonnage industrial steel contracts under 100% Irrevocable Letters of Credit (L/C) at sight.
• Seaworthy Heavy-Duty Wrapping: Coils are secured utilizing an industrial multi-layer barrier: inner waterproof VCI anti-corrosion wrap, robust outer corrugated steel protective jackets, heavy-gauge interior/exterior steel edge guards, and high-tensile strapping anchored tightly to sturdy wooden pallets.
• Extended Port Storage cushion: SXY Steel Group pre-allocates 14 to 21 days of complimentary container demurrage at your destination port to ensure ample local custom clearance margins.
| Item | Specification |
|---|---|
| Product Name | G550 Structural Galvanized Steel Coil |
| Place of Origin | China |
| Type | High-Strength Galvanized Steel Coil |
| Standard | ASTM A653 (G550), JIS G 3302 (SGCC 550), DIN EN 10346 (S550GD) |
| Certificate | ISO 9001 |
| Grade | G550 (Min. Yield Strength 550 MPa), Equivalent to SGCC 550, S550GD |
| Base Steel Grade | High-strength low-alloy (HSLA) or specially processed carbon steel |
| Thickness | 0.1-5 mm |
| Surface Treatment | Anti-fingerprint / Skin pass / Oiled / Dry / Chromated |
| Coating Type | Electro galvanized or Hot-dip Galvanized |
| Coating Mass | Standard coating (e.g., Z60–Z275) or customized |
| Size | Customized as required |
| Tolerance | ±1% |
| Processing Service | Bending, Welding, Decoiling, Cutting, Punching |
| Invoicing | By actual weight |
| Delivery Time | 7-15 days |
| Technique | Hot-dip Galvanized / Electro galvanized |
| Port | Tianjin, Qingdao, or as required |
| Packaging Details | In bundles, in bulk, or customized packing |
| Key Application | Structural components, high-strength frames, roofing & wall systems, automotive structural parts, shelving systems |
| Note | G550 refers to minimum yield strength of 550 MPa. Material is suitable for structural applications requiring high strength and corrosion resistance. |
Packing and shipping
Our company has passed ISO9001 quality management system certification, Our Mill product with CE/EN10204 / ASTM/Classification society certificate/CASO/BIS etc certificate.All the customers give good appreciation to our products.We are glad to be your good partner.
Application Areas
Steel is widely used in steel structure workshops, bridge frames, main structures of high-rise buildings, and infrastructure construction (such as highways, oil and gas pipelines). Its high strength properties ensure load-bearing stability and seismic performance. In ship manufacturing, steel is used to build hull structures, decks, and internal components. Hot-rolled coils rely on their load-bearing capacity to adapt to harsh environments.
Factory workshop
With a commitment to excellence, innovation, and sustainability, the company has established itself as a trusted partner in the international steel industry.After nearly two decades of relentless endeavour, our client base now spans over 110 countries and regions across Europe, the Middle East, South America, and Southeast Asia.
Free Slitting Line Layout Optimization & Structural Purlin/Decking Nesting Evaluation
Submitting detailed structural slicing parameters for high-speed roll-forming machinery, metal decking production setups, or regional structural stock supply? Upload your custom strip width schedules, maximum target roll mass, internal core diameter parameters, or engineering Bill of Materials (BOM) schematics below. The engineering team at SXY Steel Group will promptly process a nesting calculation model to minimize scrap material loss and protect your purchasing budget.
