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Help CenterSteel Pipe & Tube & Alloy Steel Pipe，ASTM A335、ASME SA335、GB/T 5310、GB/T 6479
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Steel Pipe & Tube & Alloy Steel Pipe，ASTM A335、ASME SA335、GB/T 5310、GB/T 6479NegotiableMOQ: 5 Metric Tons -
Steel Pipe & Tube & Alloy Steel Pipe，ASTM A335、ASME SA335、GB/T 5310、GB/T 6479NegotiableMOQ: 5 Metric Tons
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Steel Pipe & Tube & Alloy Steel Pipe，ASTM A335、ASME SA335、GB/T 5310、GB/T 6479NegotiableMOQ: 5 Metric Tons
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Steel Pipe & Tube & Alloy Steel Pipe，ASTM A335、ASME SA335、GB/T 5310、GB/T 6479NegotiableMOQ: 5 Metric Tons
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Steel Pipe & Tube & Galvanized Steel Pipe，Q195、Q215、Q235B、Q355BNegotiableMOQ: 5 Metric Tons
Alloy Steel Pipe Product Detailed Description
1. Product Definition
Alloy Steel Pipe is made of high-quality carbon steel as the base material, added with alloy elements such as Chromium (Cr), Molybdenum (Mo), Nickel (Ni), Vanadium (V) and Manganese (Mn). It is manufactured through hot rolling or cold drawing process. The total content of alloy elements is usually more than 5%. It is a core pipe suitable for harsh working conditions such as high temperature, high pressure and strong corrosion.
2. Main Materials and Chemical Composition
Common Steel Grades (GB/ASTM Standard Comparison)
12Cr1MoVG (GB/T 5310) → A335 P11
15CrMo → A335 P12
12Cr9Mo → A335 P9
1Cr5Mo → A335 P5
40Cr, 35CrMo (Structural Use)
Function of Key Alloy Elements
| Element | Core Function |
|---|---|
| Chromium (Cr) | Form dense oxide film, improve high temperature resistance, corrosion resistance and hardenability |
| Molybdenum (Mo) | Strengthen high temperature strength, creep resistance, suitable for high pressure working conditions |
| Nickel (Ni) | Improve low temperature toughness and acid & alkali corrosion resistance |
| Vanadium (V) | Refine grain structure, enhance strength and impact toughness |
| Manganese (Mn) | Deoxidation and desulfurization, improve strength and processing performance |
3. Product Specifications
Size Range
Outer Diameter: 16mm–830mm (Common sizes: 57mm, 108mm, 219mm, 377mm)
Wall Thickness: 3mm–140mm (Heavy wall pipe ≥6mm, suitable for high pressure occasions)
Length: Fixed length 6m–12m, non-standard customization available
Execution Standards
National Standard: GB/T 5310 (High-pressure Boiler Pipe), GB/T 6479 (Chemical Fertilizer Special Pipe), GB/T 8162 (Structural Pipe)
American Standard: ASTM A335, ASME SA335
4. Manufacturing Process
Hot Rolling (Extrusion): Pipe billet → Heating → Piercing → Rolling → Sizing → Cooling → Straightening. Suitable for medium and large diameter & heavy wall pipes with high production efficiency.
Cold Rolling (Cold Drawing): Pipe billet → Piercing → Annealing → Pickling → Multi-pass cold drawing → Heat treatment → Finishing. Features high dimensional accuracy and smooth surface, suitable for small diameter & thin wall pipes.
Heat Treatment: Adopt normalizing, tempering or quenching & tempering to stabilize microstructure and optimize mechanical properties.
5. Core Performance Characteristics
High Strength and Toughness: Tensile strength 620–980MPa, yield strength ≥205MPa, 30%–50% higher than ordinary carbon steel, with excellent impact resistance and fatigue resistance.
High Temperature Oxidation Resistance: Long-term service at 500℃–800℃, forming stable Cr₂O₃ oxide film above 600℃ to resist high temperature oxidation and peeling.
Corrosion and Wear Resistance: Resist corrosion of steam, oil, gas, acid and alkali medium, high hardness with better wear resistance than ordinary steel pipes.
Excellent Creep Resistance: Not easy to produce plastic deformation under high temperature, suitable for long-term high temperature and high pressure working conditions.
Eco-friendly and Recyclable: 100% recyclable, complying with energy saving and resource recycling requirements.
6. Main Applications
Power Energy Industry: High-pressure boiler superheater, reheater, main steam pipeline, nuclear power cooling system pipeline.
Petrochemical Industry: Crude oil transportation, catalytic cracking unit, high temperature and high pressure reactor pipeline, acidic medium transmission pipeline.
Mechanical Manufacturing: High-strength structural parts, hydraulic system high-pressure pipeline, construction machinery hydraulic cylinder, automobile half shaft and other parts.
Other Fields: Aerospace, military industry, boiler equipment, thermal pipeline and other harsh working condition scenarios.
7. Product Advantages
Stable Performance: Synergistic effect of alloy elements, balancing strength, heat resistance and corrosion resistance, adapting to extreme working conditions with long service life.
Safe and Reliable: Seamless structure without weld defects, no leakage under high pressure, meeting safety standards of pressure pipelines.
Strong Adaptability: Complete specifications, customized material and size available to meet the demands of different industries and working conditions.
Cost-effective: No frequent replacement in long-term use, low maintenance cost and high comprehensive cost performance.
8. Packaging & Delivery
Packaging: Both ends sealed with rust-proof treatment, bundled packing or wooden box packing to avoid collision and damage during transportation.
Delivery Time: 5-7 days for conventional stock goods; 7-15 days for customized specifications.
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