S550GD (1.0531) Galvanized Steel Sheet/Plate
S550GD (1.0531) Galvanized Steel Sheet/Plate
- Alloy or Not: Non-alloy
- Technique: Hot Rolled, Cold Rolled
- Size: As requested; details see product parameters
- Galvanization: Hot-Dip, Electro, Pre
- Condition: +HR/+CR/+A/+AR/+EG/+HDG, or as requested
- Processing Service: Cutting, Slitting, Bending, Stamping, Punching, etc.
- Certification: ISO 9001, CE
- Inspection: SGS, TUV, Factory Inspection
- Origin: Hubei/Henan/Jiangsu, China
- Port: Qingdao, Tianjin, Lianyungang
- MOQ: 5 tons (or as per negotiation)
- Delivery Time: 8-14 Days
- Payment: T/T, L/C
Product Detail
S550GD galvanized steel sheet is a high-strength low-alloy (HSLA) steel with a yield strength of up to 550 MPa, coated with zinc for improved corrosion resistance. Its durability makes it ideal for construction, automotive, and appliance industries, particularly in challenging environments.
Incorporating small amounts of manganese and silicon enhances strength and toughness without compromising processing and corrosion resistance. This makes S550GD suitable for structural components and exterior applications, such as roofs, vehicle bodies, and appliance casings.
S550GD is well-suited for machining, with techniques like laser and plasma cutting yielding clean edges. It also adapts effectively to both cold and hot bending processes, offering flexible design options.
For welding, S550GD is reliable, though it is recommended to remove some zinc coating beforehand to prevent harmful zinc vapors. Common welding methods include arc and spot welding, making it suitable for various manufacturing applications.
Contact us if you are unfamiliar with this product or if you have unanswered questions.
Features
S550GD galvanized steel sheets/plates could bring the following benefits to your project:
- Built to Last – The galvanized coating helps resist rust, so your projects stand the test of time.
- Strong and Reliable – With great load-bearing capacity, it’s perfect for a wide range of structures.
- Easy to Work With – Whether cutting, welding, or shaping, this steel makes your job easier.
- Looks Good – Its smooth surface not only looks nice but also cuts down on finishing work.
- Lightweight Convenience – It’s easy to transport and install, saving you time and effort.
- Environmentally Friendly – Plus, it’s recyclable, which is great for the planet.
Applications
Construction
Structural beams, roofing sheets, wall panels, framing components, etc.
Automotive
Car body panels, chassis parts, protective components, exhaust systems, etc.
HVAC
Ductwork, ventilation hoods, air conditioning units, protective enclosures, etc.
Appliance Manufacturing
Refrigerator bodies, washing machine panels, dryer cabinets, dishwasher enclosures, etc.
Furniture
Metal shelves, cabinets, bed frames, storage units, etc.
Electrical
Cable trays, electrical enclosures, switchgear panels, protective covers, etc.
Product Parameters
| Parameter | Details | |
|---|---|---|
| Standard | EN 10346, EN 10142, ASTM A653/A653M, GB/T 18982, GB/T 1591, JIS G3302, ISO 3574, GB/T 700, ASTM A924/A924M, etc. | |
| Grade | S550GD | |
| Metal Coating Type | Z (Pure Zinc), ZF (Zinc-Iron Alloy), ZA (Zinc-Aluminum Alloy), ZM (Zinc-Magnesium Alloy), AZ (Aluminum-Zinc Alloy) | |
| Thickness | Sheet | 0.5-6.0 mm, or as requested |
| Plate | 6-300 mm, or as requested | |
| Width | Sheet | 600-2,000 mm, or as requested |
| Plate | 900-4800 mm, or as requested | |
| Length | Sheet | 1,000-6,000 mm, or as requested |
| Plate | 3000-55000 mm, or as requested | |
| Tolerance | ±1%, or as requested | |
| Galvanization | Hot-Dip Galvanizing, Electro-Galvanizing, Pre-Galvanizing | |
| Zinc Coating | Z30-600 g/m² | |
| Surface Structure | Regular Spangle, Minimized Spangle, Zero Spangle, Big Spangle | |
| Surface Treatment | 1) Skin Pass, Sand Blasted 2) Pre-painted 3) Galvanized 4) Oiled 5) Passivated 6) PE, SMP, PVDF, or other anti-corrosive coatings 7) As requested |
|
| Condition of Delivery | +HR/+CR/+A/+AR/+EG/+HDG, or as requested | |
| Testing Method | CCA/MPT/CST/SST/MA/NDT, etc. | |
| Application | Roofing sheets, wall panels, structural beams, framing components, car body panels, chassis parts, protective enclosures, ductwork, ventilation hoods, refrigerator bodies, washing machine panels, metal shelves, storage units, electrical enclosures, cable trays, etc. | |
| Certification | Approved by ISO 9001, CE | |
| Packaging | Standard seaworthy packing, or as requested | |
*Condition of Delivery: HR – Hot Rolled, CR – Cold Rolled, A – Annealed, AR – As Rolled, EG – Electro-Galvanized, HDG – Hot-Dip Galvanized
*Testing Method: CCA – Chemical Composition Analysis, MPT – Mechanical Properties Testing, CST – Coating Surface Testing, SST – Salt Spray Testing, MA – Metallographic Analysis, NDT – Non-Destructive Testing
Material Specifications
Chemical Composition
| Grade | C | Si | Mn | P | S |
|---|---|---|---|---|---|
| S550GD | ≤0.2 | ≤0.6 | ≤1.7 | ≤0.1 | ≤0.045 |
*According to EN 10346-2015.
Mechanical Properties
| Grade | Tensile Strength (σb, MPa) | Yield Strength (σs, MPa) | Elongation (δ, %) |
|---|---|---|---|
| S550GD+Z | ≥560 | ≥550 | / |
| S550GD+ZF | |||
| S550GD+ZA | |||
| S550GD+ZM | |||
| S550GD+AZ |
*According to EN 10346-2015.
*The following minimum elongation values apply for different thicknesses:
- 0.5mm < t ≤ 0.7mm: minimum elongation is reduced by 2% from the values in the table.
- 0.35mm < t ≤ 0.5mm: minimum elongation is reduced by 4% from the values in the table.
- t ≤ 0.35mm: minimum elongation is reduced by 7% from the values in the table.
Why Choose Us
Consistent Quality
We address your primary quality concerns with S550GD galvanized steel sheets/plates — such as coating uniformity, potential missed spots, and coating adhesion — through continuous hot-dip galvanizing processes & strict control of temperature and timing, non-destructive thickness testing with magnetic gauges, and multi-step-pre-treatment, including acid cleaning and surface preparation, to ensure consistent performance, corrosion resistance, and long-lasting durability across various environments.
Precise Dimensions
We guarantee the dimensional accuracy of our S550GD galvanized steel sheets/plates, maintaining tight tolerances within ±0.01 mm through precision equipment and ISO 9001-certified processes. Every batch undergoes 100% inspection, with zero deviation complaints in the past 5 years. We ensure smooth project execution without installation delays.
Stable Supply
We have 3 factories with a combined annual capacity of over 500,000 tons. In the event of any unforeseen circumstances, we can coordinate across factories to ensure stable production and on-time delivery.
Stable & Competitive Pricing
We maintain upstream raw material suppliers with price-lock agreements in place to effectively manage material cost fluctuations. Also, considering that our clients may face pressure from market changes, we will try our best to offer reasonable discounts to both new and existing clients.
Secure Packaging & Shipping
Packaging can be customized according to your requirements. We provide transparent, real-time photos of the packaging and loading process for your verification. You can also choose your trusted freight forwarder for transportation to ensure the entire logistics process is secure and reliable.
About Us
Founded in 1999, SteelPRO Group operates three factories with a combined annual production capacity of over 500,000 tons. We specialize in manufacturing a wide range of steel products, including round steel, profiles, plates, and pipes. Our portfolio encompasses low-alloy structural steel, tool steel, special steel, and more.
With strict adherence to global standards such as GB, ASTM, DIN, EN, and JIS, we ensure high-quality products, including heat-treated, machined, and prestressed steel. Our solutions are trusted by customers in diverse industries, and we proudly export to different countries across Europe, North America, and Asia.
At SteelPRO, we are dedicated to delivering tailored steel solutions and growing alongside our dear clients.
Certification
FAQ
What are your prices?
Our prices are subject to change depending on supply and market conditions. For an accurate and up-to-date quote, please contact our sales team directly.
Can you provide relevant documentation?
Yes, we can provide a wide range of documentation, including Certificates of Analysis/Conformance, Insurance, Certificates of Origin, and any other required export documents.
What is the average lead time?
As per mass production, the lead time is 5-20 days after:
1) we have received your deposit; 2) we have received your final confirmation on your orders.
If our lead time doesn’t meet your deadlines, please contact our sales directly in advance in case of any potential issues. We will try to accommodate your needs in all cases, and we are able to do so in most cases.
Can you provide free samples?
Yes, we can provide free samples for quality evaluation. However, shipping costs are generally covered by your company.
Can I visit your factory?
Of course! You are welcome to visit our factory. Please contact us in advance to arrange a convenient time for your visit, and we will gladly organize a tour and provide any necessary information to ensure a productive visit.
Our Service
SteelPRO Group – manufacturer and solution provider for special steel, offering multi-industry application solutions and customised services, 100% quality free, accompanying customers in their growth!
Our Quality Control
- Roundness
- Tolerance
- Microstructure
- Non-Destructive Testing
- Destructive Testing
- Process Control
Service Integration Processing
- Welding
- Metal Fabrication
- CNC Machining
- Lathe
- Forming
