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Q355B Galvanized Round Pipe | ASTM A53 Gr.B S355JR STK490 Hot Dip Galvanized Steel Tube
- Multi-grade equivalent: Q355B matches ASTM A53 Gr.B, S355JR, STK490 for international project standards
- High yield & tensile strength, excellent load-bearing capacity for heavy-duty structural use
- Reliable hot-dip galvanized coating, outstanding anti-corrosion performance for outdoor environments
- Good weldability and impact resistance, stable performance in low-temperature conditions
- Complete OD & wall thickness range, custom cut lengths, strict dimensional tolerance control
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Product Overview
Our Q355B Galvanized Round Pipe is hot dip galvanized welded carbon steel pipe. The base material Q355B is equivalent to ASTM A53 Gr.B (American standard), S355JR (EN European standard), and STK490 (JIS Japanese standard). This high-strength galvanized round pipe features superior mechanical strength and impact resistance. The hot-dip galvanized layer tightly bonds with the steel substrate to prevent rust and corrosion. It is widely used for highway guardrails, heavy load steel frameworks, construction supports, engineering structural components and heavy-duty fluid conveyance projects. We provide a full range of outer diameter and wall thickness options, support cut-to-length service, all pipes undergo strict factory inspection and come with mill test certificates.
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FAQs
Q355B base material is equivalent to ASTM A53 Gr.B, EN S355JR and JIS STK490, compatible with multiple international standards for global construction projects.
It is high strength galvanized pipe mainly used for highway guardrails, heavy load steel structures, building supports and heavy engineering frameworks.
MOQ is 5 tons. Mixed sizes within one order can be negotiated.
Yes, custom cutting service is available according to your project requirements.
Yes, MTC will be supplied with shipment. Third-party inspection can be arranged upon request.
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