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Help CenterSteel Pipe & Tube & Alloy Steel Pipe，15CrMoG / 12Cr1MoVG、12Cr2MoG / 10CrMo910、P91 / P92
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Steel Pipe & Tube & Cast Steel Pipe，Q235、20#、35#、45#、16Mn、Q355、Cr5Mo、ZG40Cr25Ni20Si2NegotiableMOQ: 5 Metric Tons
Alloy Steel Pipe Detailed Product Description
1. Product Definition
Alloy steel pipe is made of high-quality carbon steel with added alloy elements such as Chromium (Cr), Molybdenum (Mo), Nickel (Ni), Vanadium (V) and Manganese (Mn), manufactured by hot rolling or cold drawing process. Featuring high strength, high temperature resistance and corrosion resistance, it is widely used in harsh working conditions of high pressure, high temperature and strong corrosion.
2. Main Materials & Chemical Composition
Common Grades (GB Standard / ASTM Standard)
Chromium-Molybdenum Steel (High Temperature & High Pressure): 15CrMo, 12Cr1MoV, 12Cr2MoG, ASTM A335 P11/P22
High Chromium Steel (Ultra-high Temperature): 1Cr5Mo, 10Cr9Mo1VNb (P91)
Low Temperature & Corrosion Resistant: 16Mn, ASTM A333 Gr.6, Nickel-based Alloy
Function of Alloy Elements
Cr (Chromium): Improve oxidation resistance, corrosion resistance and hardenability
Mo (Molybdenum): Enhance high-temperature strength and creep resistance
Ni (Nickel): Optimize low-temperature toughness and corrosion resistance
V (Vanadium): Refine grain structure and strengthen toughness
3. Implementation Standards
Chinese GB Standard: GB/T 8162 (Structural Pipe), GB/T 8163 (Fluid Pipe), GB 5310 (High-pressure Boiler Pipe), GB 6479 (Chemical Fertilizer Pipe)
American ASTM Standard: ASTM A335 (High Temperature Pipe), ASTM A333 (Low Temperature Pipe), ASME SA213 (Boiler & Superheater Pipe)
4. Specification Parameters
Outer Diameter: 10mm–630mm (Common: 21.3mm–323.9mm)
Wall Thickness: 2mm–100mm (Common: 3.2mm–40mm)
Length: Fixed length 6m/12m, customized as required
Delivery Condition: Normalizing, Tempering, Quenching and Tempering
5. Product Characteristics
High Strength & Toughness: 30%-50% higher strength than ordinary carbon steel, excellent impact resistance and fatigue resistance, suitable for high-pressure heavy-duty occasions.
High Temperature & Oxidation Resistance: Long-term stable operation at 500℃–800℃, dense Cr₂O₃ oxide film formed on surface to prevent high-temperature oxidation.
Corrosion & Wear Resistance: Resistant to hydrogen sulfide, acid and alkali medium; high hardness and wear resistance to extend service life.
Stable Low-temperature Performance: Special low-temperature steel maintains good toughness at -45℃ without brittle fracture.
6. Manufacturing Process
Hot Rolling / Extrusion: Billet → Heating → Piercing → Rolling/Extrusion → Sizing → Cooling → Straightening. Suitable for large-diameter and thick-wall pipes with high production efficiency.
Cold Drawing / Cold Rolling: Billet → Piercing → Annealing → Pickling → Oiling → Multi-pass Cold Drawing → Heat Treatment → Finishing. High dimensional accuracy and smooth surface, suitable for small-diameter and thin-wall pipes.
7. Main Application Fields
Power Station: High-pressure boiler superheater, reheater, main steam pipeline (15CrMoG, 12Cr1MoVG)
Petrochemical Industry: High-temperature and high-pressure reactor, cracking furnace pipe, oil and gas transmission pipeline (1Cr5Mo, P91)
Coal Chemical & Chemical Fertilizer: High-pressure ammonia synthesis unit, urea equipment pipeline (GB 6479 standard)
Aerospace: High-temperature gas conduit, engine tailpipe (Super Alloy Pipe)
Ship & Offshore Engineering: High-pressure hydraulic pipe, corrosion-resistant pipeline (Duplex Stainless Steel / Nickel-based Alloy)
8. Product Advantages
100% recyclable, environmentally friendly and in line with national energy-saving policies.
Long service life and low comprehensive cost; high temperature and creep resistance reduce maintenance downtime.
Seamless structure, no leakage risk under high pressure, ensuring safe system operation.
9. Quality Assurance
Non-destructive Testing: Each batch passes Ultrasonic Testing (UT), Eddy Current Testing (ET) and Hydrostatic Testing to ensure no cracks, inclusions or leakage.
Material Traceability: Complete Material Test Certificate (MTC) provided, including chemical composition, mechanical properties and heat treatment records.
10. Delivery Information
Delivery Cycle: 5–7 days for regular specifications in stock; customized for special sizes.
Shipping Port: Tianjin Port, Qingdao Port (FOB/CIF/CFR terms acceptable).
Packaging: Anti-rust paint + plastic pipe cap + woven bag / wooden box, or customized packaging as customer’s requirement.
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