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ASTM Zinc Magnesium Aluminum ZAM Galvanized Steel GI Square Tubes
Key Specifications & Material Properties
YTDR Group's ASTM-certified Zinc Magnesium Aluminum (ZAM) Galvanized Steel Square Tubes represent the next generation of corrosion protection technology. These pre-galvanized rectangular hollow sections undergo hot-dip galvanizing before formation using a unique zinc-magnesium-aluminum alloy composition (Zn-96% Mg-2% Al-2%), ensuring complete coating coverage on all surfaces, including edges and corners. Manufactured in compliance with ASTM A500 Grade B and EN 10346 standards, our tubes feature a minimum coating thickness of 85μm, providing superior corrosion resistance that is 5-8 times better than conventional galvanized steel. Available in standard sizes from 20x20mm to 150x150mm with wall thicknesses ranging from 1.2mm to 5.0mm, we support custom specifications to meet diverse project requirements. The unique ternary alloy coating creates a dense, self-healing protective layer that effectively prevents red rust formation even in harsh environments.
With 18 years of specialized steel tube manufacturing expertise and 600+ successful global projects, YTDR delivers exceptional value through:
● Advanced Manufacturing: Continuous hot-dip galvanizing lines with automated control systems ensure uniform coating distribution and consistent quality
● Stringent Quality Assurance: Four-stage inspection process (material incoming, process control, dimensional check, final certification) maintains a remarkable 0.08% defect rate
● Cost Efficiency: Integrated production from raw material to finished product enables 18-22% lower lifetime costs compared to industry averages
● Rapid Service: 18-hour average quotation response time and flexible MOQ from 3 tons accommodate projects of all scales
● Technical Excellence: Dedicated engineering team provides comprehensive technical support, from material selection to installation guidance
Service Life
Lifespan in Different Environments
The innovative ZAM coating system delivers exceptional longevity across environments:
Rural/urban areas: 25-30 years
Coastal regions: 20-25 years
Industrial zones: 18-22 years
This represents 3-5x extension over uncoated steel tubes. The enhanced durability stems from the zinc-aluminum-magnesium composition that forms stable protective layers, combined with Q235B/S355JR steel base providing excellent mechanical properties. A Southeast Asian client's 2014 outdoor warehouse structure remains corrosion-free after 10 years of tropical exposure.
Maintenance
YTDR's ZAM galvanized tubes require minimal maintenance:
● Regular Cleaning: Simple water rinsing or soft cloth wiping maintains appearance in most conditions
● Damage Repair: Minor scratches can be effectively treated with zinc-rich paint (containing 92% zinc) without requiring re-galvanizing
● Inspection Schedule: Biannual visual inspections versus quarterly checks needed for conventional steel tubes
This maintenance approach reduces long-term upkeep costs by 80% compared to uncoated steel tubes while ensuring continuous protection performance.
Application Channels
● Construction Industry: Structural frameworks, building supports, and outdoor facilities benefiting from the rectangular shape for easy connection and superior corrosion resistance
● Solar Energy: Mounting structures and support systems leveraging the enhanced durability and structural stability
● Transportation Infrastructure: Vehicle frameworks, guard rail systems, and signage supports utilizing the high strength-to-weight ratio
● Industrial Equipment: Machinery guards, conveyor supports, and equipment frameworks benefiting from the clean appearance and long-term durability
● Agricultural Applications: Greenhouse structures and farming equipment utilizing the corrosion resistance against fertilizers and moisture
● American Standard (ASTM): Gr. A, B, C, etc.
● European Standard (EN): S235, S275, S355, S420, S460, etc.
● Japanese Standard (JIS): SS400, STKR400, STKR490, etc.
● Chinese Standard (GB): Q195, Q235, Q355, etc.
● Canadian Standard (CSA): 300W, 350W, etc.
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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Brand |
Yuantai Derun Steel Pipe Manufacturing Group |
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Outer Diameter |
42/48.3/51/60.3 mm |
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Wall Thickness |
3.5 / 2.75 / 3.2 mm
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Length |
1m, 1.5m, 2m, 3m, 4m, 5m, 6m 0.6m, 0.9m, 1.2m, 1.5m, 1.8m, 2.0m, 2.4m
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Tolerance |
±5%, ±10% as required |
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Shape |
Round
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Standards |
ASTM A500/A501,EN10219,EN10210 |
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Grade |
10#, 20#, 45#, 16Mn, Q235, Q345, Q195 |
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Surface Treatment |
Galvanized Coating |
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Zinc Coating |
60-120g/m2 |
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Certificate |
CE,LEED,BV,PHD&EPD,BC1,EN10210/10219, ISO9000/14001/45001,DNV,ABS,JIS G3466 |
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Application |
1. Construction Field 2. Manufacturing Field 3. Transportation Field 4. Furniture & Agriculture Field |
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MOQ |
2-5 Tons or No minimum order |
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Delivery Time |
7-15 days |
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Samples |
Free Samples Get Free Sample Now! |