S550GD (1.0531) Galvanized Steel Pipe/Tube
S550GD (1.0531) Galvanized Steel Pipe/Tube
- Alloy or Not: Non-alloy
- Type: Welded pipe
- Technique: ERW/HFW, EFW, DSAW/SSAW etc.
- Size: As requested; details see product parameters
- Section Shape: Round, Square, Rectangular, Oval, etc.
- Galvanization: Hot-dip, Electro, Pre
- Processing Service: Cutting, Punching, Bending, Welding, Decoiling, 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 is a reliable choice for high-strength galvanized carbon steel, known for its strong performance and excellent corrosion resistance. The zinc coating effectively prevents rust, making it suitable for a variety of applications.
This steel meets the European standard EN 10143 and typically has a yield strength of over 550 MPa. This strength, along with good formability, makes S550GD easy to process and weld. It’s particularly effective in challenging conditions, such as humid environments or exposure to chemicals, which is crucial for outdoor and demanding projects.
You’ll find S550GD commonly used in construction, transportation, and infrastructure, especially in applications requiring heavy load support. It’s also applied in power equipment, mechanical components, and agricultural facilities. The durability of S550GD helps reduce maintenance and replacement needs, contributing to sustainability efforts. Additionally, the galvanized coating is recyclable, which supports eco-friendly design.
Contact us if you are unfamiliar with this product or have unsolved questions.
Features
S550GD galvanized steel pipes/tubes could bring the following benefits to your project:
- Resistant to Rust – The galvanized coating helps keep the pipe from corroding.
- Strong and Reliable – Built to handle heavy loads without bending or breaking.
- Long-lasting – Fewer repairs mean more savings in the long run.
- Welds Easily – Connects smoothly with other materials for versatile use.
- Versatile Use – Works well in different settings and applications.
- Light and Convenient – Easy to move and install, saving you time and effort.
Applications
Construction
Structural supports, scaffolding, roofing frameworks, temporary fencing, etc.
Utilities
Electrical conduits, cable trays, protective tubing for power lines, water pipelines, etc.
Agriculture
Greenhouse frames, animal pens, irrigation piping, farm building structures, etc.
Transportation
Trailer frames, protective barriers, rail infrastructure, truck beds, etc.
Industrial Equipment
Conveyor systems, machine frames, safety barriers, heavy-duty shelving, etc.
Public Infrastructure
Road guardrails, pedestrian barriers, street lighting poles, bridge reinforcements, etc.
Product Parameters
| Parameter | Details | |
|---|---|---|
| Standard | EN 10346, EN 10025, EN 10219, ASTM A123/A123M, ASTM A653/A653M, JIS G3302, ISO 1461, GB/T 709, ASTM A53, ASTM A500, AS 1163, GB/T 6728, ISO 3183, 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) | |
| OD (Outer Diameter) | Pipe | 21.3 – 219 mm; or as requested |
| Tube | 10 – 114 mm; or as requested | |
| WT (Wall Thickness) | Pipe | 2.0 – 12.0 mm; or as requested |
| Tube | 0.5 – 6 mm; or as requested | |
| Length | Pipe | Standard 6m or 12m; or as requested |
| Tube | Standard 6m; or as requested | |
| Tolerance | ±1%, or as requested | |
| Section Shape | Round, Square, Rectangular, Oval, etc. | |
| Galvanization | Hot-Dip Galvanizing, Electro-Galvanizing, Pre-Galvanizing | |
| Zinc Coating | Z30-600 g/m² | |
| Technique | 1) Electric Resistance Welding / High-Frequency Welding (ERW / HFW) ; 2) Electric Fusion Welding (EFW) ; 3) Double Submerged Arc Welding / Spiral Submerged Arc Welding (DSAW / SSAW) |
|
| End | Plain (PE), Beveled (BE), Threaded (TE), Grooved, or as requested | |
| End Protector | Plastic caps, Metal end caps | |
| Pipe Fittings | Elbows, Tees, Couplings, Threaded, Flanges, Caps, etc. | |
| Surface Treatment | 1) Skin Pass, Sand Blasted 2) Pre-painted 3) Galvanized 4) Oiled 5) Passivated 6) 3LPE, FBE, or other anti-corrosive coatings 7) As requested |
|
| Testing Method | Hydrostatic Test, NDT, Tensile Test, Bending Test, Adhesion Test, Coating Thickness Test, etc. | |
| Application | Structural supports, scaffolding, electrical conduits, protective tubing for power lines, greenhouse frames, irrigation piping, trailer frames, rail infrastructure, conveyor systems, machine frames, road guardrails, street lighting poles, etc. | |
| Certification | Approved by ISO 9001, CE | |
| Packaging | Standard seaworthy packing, or as requested | |
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.
Why Choose Us
Consistent Quality
We address your primary quality concerns with S550GD galvanized steel pipes/tubes — 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 pipes/tubes, maintaining tight tolerances within ±0.01mm 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! We welcome customers 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
