Introduction to the Material of Alloy Seamless Steel Pipes

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Tianjin Sanon Steel Pipe Co., Ltd. is a stockist. Our stock factory is in Cangzhou City, Hebei Province. Our main sources of goods are boiler pipes, and the representative materials are ASTM A335 P5/P11/P91/P92, ASME SA-106/SA-106M GR.B, GB/T 3087-2008 10#/20#. The representative materials of pipeline pipes are API 5L, API 5CT, the representative materials of petroleum cracking pipes GB/T 9948 are 15MoG/12CrMoVG. GB/T 6479-2013 represents the material 10#/20#, heat exchanger tubes SA179/SA210/SA192, etc., mechanical tubes GB/T 8162 represent the material 10#/20#/Q345/42CrMo, EN10210 represents the material S355JOH/S355J2H, gas cylinder tubes GB1 8248, represent the material 34CrMo4/30CrMo.

Alloy seamless steel pipes are made from alloy steel as raw material and are produced through processes such as hot rolling, cold rolling or cold drawing. Compared with ordinary carbon steel pipes, alloy seamless steel pipes have superior mechanical properties, high-temperature resistance, corrosion resistance and special physical and chemical characteristics due to the addition of alloy elements such as chromium, molybdenum, nickel and vanadium. They are widely used in industries such as petroleum, chemical engineering, power, boilers, and mechanical manufacturing.
Main application scenarios
1. Petrochemical industry
Pipes for petroleum cracking units: require high temperature resistance, high pressure resistance and anti-sulfur corrosion properties
Pipes for fertilizer equipment: Must be resistant to corrosion by ammonia, urea, etc.
Polyester equipment piping: Requires high cleanliness and resistance to chemical corrosion
2. Power Industry
Pipeline for power station boilers: High-pressure boiler tubes, superheater tubes, etc., must be resistant to high-temperature creep.
Nuclear power plant pipes: Require special radiation resistance properties
3. Mechanical Manufacturing
Hydraulic pillar pipe: High precision and high strength requirements
Bearing tubes: Require high wear resistance
Car transmission shaft tube: High strength, high toughness
4. Aerospace
Engine tubes: High-temperature resistant alloy tubes
Hydraulic system tubing: Ultra-high strength requirements
Common material standards and requirements
1. ASTM series standards
ASTM A335: Seamless steel pipes for high-temperature use, ferritic alloy steel
Model numbers:P5 Alloy Pipe, P9, P11, P22, P91, etc.
High-temperature strength, antioxidant property, creep performance
Application: Power station boilers, petroleum cracking units
ASTM A213: Alloy steel seamless pipes for boilers, superheaters and heat exchangers
Bottle type: T5, T9, T11, T22, T91, etc.
High-temperature endurance strength and antioxidant property
2. DIN/EN Standard Series
DIN 17175/EN 10216-2: Seamless Steel Pipes for High Temperature Applications
Grade: 13CrMo4-5, 10CrMo9-10, X10CrMoVNb9-1 (P91)
High-temperature creep strength and welding performance
3. GB Standard Series
GB 5310: Seamless Steel Pipes for High-Pressure Boilers
Grade: 15CrMoG, 12Cr1MoVG, 10Cr9Mo1VNb, etc.
High-temperature strength, antioxidant property, process performance
GB 9948: Seamless Steel Pipes for Petroleum Cracking
Grade: 12CrMo, 15CrMo, 1Cr5Mo, etc.
Resistant to high-temperature sulfur corrosion and hydrogen damage
High-temperature strength, welding performance
Typical alloying elements and their functions
Chromium (Cr): Enhances oxidation resistance, corrosion resistance, and increases high-temperature strength
Molybdenum (Mo): Enhances high-temperature strength and creep resistance
Nickel (Ni): Enhances toughness, corrosion resistance, and improves low-temperature performance
Vanadium (V): Reduces grain size, enhances strength and toughness
Niobium (Nb): Enhances creep resistance and improves welding properties
Titanium (Ti): Stable carbides, enhancing intergranular corrosion resistance

Alloy seamless steel pipes, as a crucial material in the industrial sector, their performance and quality directly affect the safe operation and service life of equipment. Correct selection of material standards and specifications, as well as strict control of production processes and quality inspections, are essential guarantees for ensuring the reliable operation of the pipeline system.