G550 Galvanized pipe

‌G550 Galvanized Pipe: Ultra-High-Strength Structural Steel for Demanding Environments.‌ ‌Engineered for Heavy-Duty Performance: Construction, Mining & Energy‌ G550 galvanized pipe is a ‌high-strength, low-alloy (HSLA) steel‌ with a minimum yield strength of 560 MPa and tensile strength of 650 MPa. Featuring a ‌Z275 zinc coating‌ (275 g/m²), it resists corrosion 8–10x longer than standard galvanized steel in harsh conditions like offshore platforms and industrial roofing.

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Product Introduction

G550 Galvanized Pipe: Ultra-High-Strength Structural Steel for Demanding Environments.‌

‌Engineered for Heavy-Duty Performance: Construction, Mining & Energy‌

G550 galvanized pipe is a ‌high-strength, low-alloy (HSLA) steel‌ with a minimum yield strength of 560 MPa and tensile strength of 650 MPa. Featuring a ‌Z275 zinc coating‌ (275 g/m²), it resists corrosion 8–10x longer than standard galvanized steel in harsh conditions like offshore platforms and industrial roofing.


‌Certifications & Key Advantages‌

  • ‌ASTM A653 & EN 10346 Certified‌: Compliant with JIS G3321 and AS 1397 standards.
  • ‌Cost Efficiency‌: 30% lighter than traditional steel structures, reducing installation costs.
  • ‌Custom Sizing‌: Thickness 0.1–300 mm (±0.15 mm), width up to 3 meters.
  • ‌MOQ 3 Tons‌: Hot-dip galvanized (HDG) or electroplated (EG) finishes available.

‌Technical Specifications‌

‌Mechanical Properties‌

Property Value Test Standard
Yield Strength ≥560 MPa ASTM E8/E8M
Tensile Strength 650–750 MPa ISO 6892-1
Elongation (A50) ≥12% EN ISO 6892-2
Zinc Coating 275 g/m² (Z275) EN 1461

‌Coating Details‌:

  • ‌Hot-Dip Galvanizing (HDG)‌: 70–85 µm layer (Z275-Z450 grades).
  • ‌Electroplating (EG)‌: 10–25 µm coating for indoor/low-corrosion use.
  • ‌Surface Prep‌: ISO 8501-1 Sa3 blast cleaning (50–100 µm profile).

‌Dimensional Tolerances‌

Parameter Tolerance
Thickness ±0.15 mm
Width ±5 mm
Length ±15 mm

‌Applications‌

  1. ‌Construction‌: Floor bearing plates, C/Z purlins, and warehouse frameworks.
  2. ‌Energy‌: Offshore oil rigs, wind turbine towers, and solar mounting systems.
  3. ‌Mining‌: Conveyor systems, trestle piles, and underground support structures.
  4. ‌Transport‌: Heavy-duty trailer chassis and railway cargo containers.

‌Fabrication Guidelines‌

  • ‌Cutting‌: Laser/plasma (pre-heat >150°C for HDG).
  • ‌Welding‌: Use ER110S-G electrodes (preheat 120–180°C).
  • ‌Bending‌: Minimum radius = 4x pipe diameter (cold-formed).
  • ‌Painting‌: Apply zinc-rich primer (5 µm) + fluorocarbon topcoat (25 µm).

‌Quality Assurance‌

  • ‌Coating Adhesion‌: ASTM D3359 cross-cut test (Class 4B rating).
  • ‌Salt Spray Test‌: 2,000+ hours (ASTM B117) for HDG pipes.
  • ‌Certifications‌: EN 10204 3.2, CE Marking, and ISO 9001:2015.

‌Competitive Edge‌

  • ‌Lifespan‌: 40–60 years in coastal/industrial zones.
  • ‌Lead Time‌: 15–25 days (MOQ 3 tons).
  • ‌Sustainability‌: 95% recyclable with 20% lower CO₂ emissions than carbon steel.

‌Logistics & Compliance‌

  • ‌Packaging‌: VCI-coated paper + steel straps (ISPM15 compliant).
  • ‌Temperature Range‌: -50°C to 450°C (HDG), -20°C to 300°C (EG).
  • ‌Optional Coatings‌: Aluminized (Galvalume) or epoxy-polyamide upon request.

‌Comparative Analysis‌

Material Yield Strength (MPa) Corrosion Resistance Key Applications
‌G550 HDG‌ ≥560 Extreme (offshore) Oil rigs, Wind towers
Carbon Steel A36 ≥250 Low General construction
Aluminum 5083-H116 ≥215 High Marine structures

‌Request Free Samples or Technical Datasheets Today!‌
Certifications: ASTM, EN, JIS. Global shipping available.

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Supplier of various types of carbon steel

Luo Kaiwei Steel Company is a comprehensive steel supplier that produces a variety of carbon steel plates, carbon steel pipes, galvanized steel, carbon steel coils, and steel profiles.

Luo Kaiwei Steel Company is a multi-ISO certified steel manufacturer specializing in carbon steel plates, pipes and galvanized coils since 2010. Competitive prices and ASTM/JIS compliant. Get instant quotes for bulk orders and global shipping support.

Tel: +86 15635685959

E-mail: [email protected]  

WhatsApp: +86 18912200505

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