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Larger Diameter 2 Inch Q235 Hot Rolled Black Hollow Steel Tube/Pipes
Our 2 Inch (60.3mm) Q235 Hot Rolled Black Hollow Steel Tubes represent a sophisticated engineering solution that bridges traditional structural requirements with modern manufacturing precision. Unlike standard black pipes, our products undergo controlled hot rolling processes that create a unique microcrystalline structure in the steel matrix, enhancing both yield strength (typically reaching 275-300MPa, exceeding standard Q235 requirements) and fatigue resistance by approximately 15%.
The characteristic black oxide layer (mill scale) isn't merely cosmetic - it serves as a natural barrier coating that provides superior atmospheric corrosion resistance compared to bare steel, while maintaining optimal surface characteristics for subsequent painting or powder coating applications. This makes our tubes particularly valuable for outdoor installations where initial corrosion protection is critical before final surface treatment.
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Parameter |
Specification |
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Outer Diameter |
60.3 mm (2 Inch NPS) |
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Wall Thickness |
2.0 mm - 6.0 mm (SCH 10-SCH 80) |
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Length |
6m Standard, 5.8m/12m Customized |
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Surface |
Black (Uncoated), Mill Scale Retained |
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End Type |
Plain End/Beveled/Threaded |
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Test Certificate |
MTC, EN 10204 3.1/3.2 |
Performance-Based Value Proposition
● Extended Service Life: Our enhanced Q235 formulation demonstrates 30-40% better atmospheric corrosion resistance in industrial environments compared to standard Q235
● Installation Efficiency: Superior straightness (≤1mm per meter) reduces alignment time and welding preparation by approximately 20%
● Cost Optimization: The combination of enhanced mechanical properties and dimensional precision allows for potential material savings through optimized engineering designs
Supply Chain Reliability
● Strategic Inventory Management: Maintain 2000+ tons of 2-inch tube inventory across regional distribution centers
● Flexible Production Scheduling: Capability to switch between standard and customized production within 48 hours
● Global Logistics Network: Established partnerships with major shipping lines ensuring on-time delivery across key markets
Technical Response Guarantee
● 4-hour initial response to technical inquiries
● 24-hour on-site support availability for critical project issues within 500km of our regional offices
● Lifetime technical consultation for all supplied materials
Material Performance Warranty
● 15-year warranty against manufacturing defects
● Complimentary failure analysis services for any performance issues
● Replacement material dispatch within 72 hours for verified warranty claims
Continuous Improvement Partnership
● Annual performance review with key clients
● Proactive notification of material improvements or specification updates
● Invitation to participate in new product development trials
YTDR Group’s ASTM A36 Q235B ERW round black welded carbon steel pipes are manufactured through a strictly controlled, automated process with 8 core stages, each accompanied by quality checkpoints to ensure precision and reliability:
Customize Your Iron Round Tubes: Grade, Shape, and Size
● Customization Options:
Custom-Shaped Square Steel Pipes – Tailored to Your Needs Yuantai Derun provides fully customizable quare steel pipes to match your unique shape specifications.
● Our standard shaping options include:
● Inner & outer right angles (sharp-cornered design)
● Inner & outer arc angles (rounded edges)
● Inner arc with outer straight edges
● Inner straight edges with outer arc
Construction & Infrastructure
● Structural Framing Systems: Optimal for light-to-medium load structures where the balance of strength and cost is critical
● Scaffolding and Temporary Structures: Enhanced yield strength provides superior safety margins for personnel support systems
● Mechanical Services Support: Ideal for HVAC duct supports, pipe racks, and equipment mounting frames
● ISO 9001:2015 Quality Management System (TÜV certified)
● CE Marking with Declaration of Performance
● Mill Test Certificates complying with EN 10204 3.1/3.2
● Additional certifications available upon request (API, UL, etc.)
Free Square Steel Pipe Samples For You
At Yuantai Derun, we take pride in delivering premium square steel pipes. To let you experience our excellence firsthand, we’re pleased to provide free samples (up to 20 cm in length), shipped directly to you via express air freight—with only the shipping cost on your end.
Why hesitate? Put our materials to the test and discover why Yuantai Derun stands out in quality and reliability. Request your sample today!
Yuantai Derun Square Steel Pipes – Quality Assured at Every Stage
From raw material sourcing to finished products, Yuantai Derun implements rigorous quality control at every step. We exclusively use traceable raw materials from reputable manufacturers, subjecting them to comprehensive inspections, including but not limited to:
● Dimensional & Visual Checks (appearance, size, straightness)
● Mechanical Testing (impact resistance, yield & tensile strength, hardness)
● Material Analysis (chemical composition, metallographic examination)
● Non-Destructive & Corrosion Testing (UT inspection, salt spray testing)
Contact us today to discuss your specific testing requirements—we ensure precision and reliability in every pipe.
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Product Description |
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Outer Diameter |
21-219 mm |
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Wall Thickness |
2.8-22 mm |
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Length |
1-24M according to client requirement |
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Tolerance |
±5%, ±10% as required |
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Brand |
Yuantai Derun Steel Pipe Manufacturing Group |
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Model |
hfw-yt-Q235 Q345 16Mn |
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Surface Treatment |
Galvanized Coating |
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Zinc Coating |
275g/m2 |
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Standards |
Hollow section: ASTM A500/A501,EN10219,EN10210 |
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Certificate |
CE,LEED,BV,PHD&EPD,BC1,EN10210/10219, ISO9000/14001/45001,DNV,ABS,JIS G3466 |
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Brand |
Yuantai Derun or OEM |
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MOQ |
2-5 Tons or No minimum order |
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Delivery Time |
7-30 days |
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Samples |
Free Samples Get Free Sample Now! |
