Product Overview
Produced through precision cold drawing and bright finishing, Bright Square Steel Pipe offers tight dimensional tolerances, a smooth surface, and consistent mechanical properties, helping reduce machining time and improve assembly accuracy.
Specifications
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Product Name |
Bright Square Steel Pipe |
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Shape |
Square |
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Size Range |
10x10 mm to 200x200 mm |
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Wall Thickness |
0.5mm - 12mm |
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Length |
Standard 6m or customized |
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Material |
Q195,Q215,Q235,Q345,20,45,16Mn; |
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Standards |
GB/T 6728,GB/T 3094,JIS G3466,EN 10219,ASTM A500 |
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Processing |
Cutting, Welding, Bending |
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Surface |
Bright |
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Special specifications and non-standard sizes can be customized for production. |
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Technical Advantages
Precision cold drawing ensures dimensional tolerances within ±0.05 mm to ±0.10 mm, simplifying assembly and reducing machining allowances.
Controlled surface processing yields a clean bright finish with a surface roughness (Ra) generally maintained below 1.6 μm, providing an optimal base for coating or fabrication.
Strict control over raw material selection and reduction ratios maintains stable yield strength (≥235 MPa for standard grades) and consistent hardness across batches.
Reliable material ductility supports efficient cutting, bending, and welding while maintaining structural integrity and dimensional stability.
Common Material Grade Equivalents
Q235 / Q235B: Equivalent to ASTM A500 Grade A / EN S235JR / JIS SS400 (Ideal for general structural framing)
Q345 / Q345B: Equivalent to ASTM A500 Grade B / EN S355JR / JIS SM490 (Ideal for high-strength mechanical components)
20# Carbon Steel: Equivalent to AISI 1020 / DIN C22 / JIS S20C (Ideal for precision cold-drawn mechanical parts)
45# Carbon Steel: Equivalent to AISI 1045 / DIN C45 / JIS S45C (Ideal for high hardness and wear resistance requirements)
Key Applications
Automation & Machinery: Linear guide rails, heavy-duty mechanical frames, robotic arms, and industrial equipment housings.
Automotive & Transportation: Automotive seat frames, interior reinforcement structures, and specialized trailer components.
Fitness & Sports Equipment: Commercial-grade heavy-duty treadmills, strength-training stations, and professional gym racks.
Modern Furniture & Architecture: Minimalist metal furniture frames, retail display fixtures, and premium interior architectural elements.
Our Precision Manufacturing Process
Raw Material Inspection: Chemical composition and surface checking of prime steel billets.
Pickling & Phosphating: Removing surface scale and preparing the metal for smooth cold drawing.
Precision Cold Drawing: Utilizing advanced dies to achieve exact outer dimensions and tight wall thickness tolerances.
Bright Annealing / Heat Treatment: Relieving internal stresses while maintaining a bright, oxidation-free surface.
Sizing & Straightening: Multi-roller mechanical alignment ensuring straightness and geometric accuracy.
Non-Destructive & Laboratory Testing: Rigorous physical, mechanical, and visual evaluations.
Anti-Rust Packaging & Dispatch: Secure bundling and moisture-proof protection for export shipping.
Manufacturing Strength & Global Supply
35+ Years of Mill Experience: Headquartered in Wuxi, Jiangsu, with extensive expertise in steel tube manufacturing and metallurgy.
Verified Quality Systems: Certified under ISO 9001, supported by CNAS and IAF accreditations, ensuring traceable and reliable production control.
Fast Lead Times & Global Reach: Optimized production scheduling enables a standard delivery window of just 15 days. We are established direct supply partners for engineering contractors and stockists across Southeast Asia and Europe.
Secure Export Packaging & Logistics
Tight steel-strip bundling to prevent shifting during transit.
Wrapping with high-strength, moisture-resistant woven fabric or waterproof plastic film.
Optional robust wooden crates or pallets for fragile, thin-walled, or specialized custom sizes upon request.
FAQ
Q: What minimum order quantities (MOQ) do you require for custom sizes or non-standard wall thicknesses?
A: MOQs typically start at 3 metric tons per size, depending on the specific grade and tooling availability, allowing flexibility for project-specific trials or smaller batches.
Q: How do you ensure the mechanical properties meet our specific project requirements before shipment?
A: Every production lot undergoes rigorous tensile testing, flattening tests, and chemical composition analysis in our certified laboratory, with full test reports included in the documentation.
Q: Can you provide third-party inspection reports from agencies like SGS or BV prior to delivery?
A: Yes, we regularly cooperate with third-party inspection agencies appointed by international buyers to conduct on-site audits, dimensional checks, and testing before final loading.
Q: What are your accepted payment terms for new overseas B2B wholesale clients?
A: We commonly accept T/T (Telegraphic Transfer) with a deposit and balance against the bill of lading copy, as well as irrevocable L/C (Letter of Credit) at sight for qualified orders.
Q: Can you provide free material samples for quality evaluation?
A: Yes, free standard-size samples can be provided for testing, with freight costs borne by the buyer.
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