Alloy Steel Seamless Pipes

Update time：2025-03-16

Alloy steel seamless pipes is a high-performance material used in a wide variety of industrial applications. Known for its strength, corrosion resistance, and high temperature resistance, it is ideal for applications such as fluid transportation, structural support, and mechanical engineering.

In this article, we will take an in-depth look at the properties, applications and standards associated with alloy steel seamless pipes.

I. Alloy Steel Seamless Pipe Materials and Characteristics:

Alloy Steel Seamless Pipes are made from a variety of alloying elements, including 10, 15, 20, 25, 30, 35, 45, 20Cr, 35Cr, 40Cr, 45Cr, 50Cr, 15Mn, 16Mn(Q345B), 50Mn, 65Mn, Q235B(A3), 15CrMo, 20CrMo, 35CrMo, 42CrMo, 5CrMnMo, 38CrMoAL, YF45MnV, Cr12MoV, Gr15, 40Mn2, 45Mn2, 60Si2Mn, 20CrMnTi, 20MnTiB, ML35, T8A, T9A, T10A, T11A, T12A, T13A, 3Cr2W8V, 20CrMnMo, 40CrMnMo, 20CrNiMo, 27SiMn and so on.

These materials give the alloy steel seamless pipe excellent mechanical properties and durability.

II. Alloy Steel Seamless Tubes and Pipes:

1 Seamless steel pipe for structure

According to GB8162-2008 standard, alloy steel seamless pipes are widely used in building and mechanical structures. Their high strength and durability make them ideal for supporting and framing structures.

2. Seamless Steel Pipe for Fluid Conveyance

GB/T 8163-2008 standard specifies the requirements of alloy steel seamless pipes for conveying fluids. These pipes are used for the transportation of fluids such as oil, gas and water, ensuring efficiency and safety.

3. Seamless steel pipes for boilers

Standards GB3087-2008 and GB5310-2008 apply to alloy steel seamless pipes for low to medium pressure and high pressure boilers respectively. These pipes perform well in high temperature and high pressure environments to ensure the safe operation of boilers.

4. High-pressure seamless steel pipes for fertilizer equipment

The GB6479-2013 standard applies to high-pressure alloy steel seamless pipes for chemical fertilizer equipment. These pipes are subject to high pressure and corrosive media in fertilizer production to ensure the long-term stable operation of the equipment.

5. Seamless steel pipes for oil cracking

The GB9948-2013 standard specifies the requirements for alloy steel seamless pipes for oil cracking. These pipes withstand high temperatures and pressures in the oil cracking process to ensure efficient and safe production.

III. Alloy steel seamless pipe specification table:

Table Description:

Specification (OD x Wall Thickness): indicates the range of OD and wall thickness of seamless alloy steel tubes.

Wall Thickness Range (mm): lists the wall thickness range of different specifications for different application scenarios.

Material: List the commonly used alloy steel materials, covering carbon steel, chromium steel, manganese steel, molybdenum steel and other alloy types.

Execution standards: List the commonly used standards at home and abroad, such as China's national standard (GB), the American Petroleum Institute standards (API), and so on.

Application areas: explains the main application scenarios of alloy steel seamless pipe, such as structural support, fluid transportation, boilers, oil drilling, etc.

IV. Alloy steel seamless pipe standards and specifications

1. Seamless steel pipes for geologic drilling

YB235-70 standard applies to alloy steel seamless pipes for geological drilling. These pipes are subject to high stress and abrasion in geological exploration to ensure the smooth progress of exploration.

2. Seamless steel pipe for oil drilling

YB528-65 standard specifies the requirements of alloy steel seamless pipes for oil drilling. These pipes are subject to high stress and corrosion in oil drilling to ensure efficient and safe drilling.

3. Seamless pipes for oil drilling collars

YB691-70 standard applies to alloy steel seamless pipes for oil drill collar. These pipes are subjected to high stress and abrasion in oil drill collars to ensure the long-term stable operation of drill collars.

4. Seamless steel pipes for automobile half shafts

The GB3088-1999 standard specifies the requirements of alloy steel seamless pipes for automobile half shafts. These pipes are subject to high stress and impact in automobile half shafts to ensure the safe operation of vehicles.

5. Seamless steel pipes for ships

The GB5312-1999 standard applies to seamless alloy steel pipes for ships. These pipes are subjected to high stress and corrosion in ships to ensure the safe traveling of ships.

6. Cold-drawn and cold-rolled precision seamless steel pipes

The GB3639-1999 standard specifies the requirements for cold-drawn and cold-rolled precision alloy steel seamless tubes. These tubes excel in precision machinery manufacturing, ensuring high precision and stability of machinery.

V. Other related standards

In addition to the above standards, alloy steel seamless pipes also follow the following standards:

GB/T17396-1998 (hot rolled seamless steel pipe for hydraulic strut)

GB3093-1986 (high pressure seamless steel pipe for diesel engine)

GB/T3639-1983 (cold-drawn or cold-rolled precision seamless steel tubes)

GB/T3094-1986 (Cold-drawn seamless steel pipe shaped steel pipe)

GB/T8713-1988 (Precision internal diameter seamless steel tubes for hydraulic and pneumatic cylinders)

GB13296-1991 (stainless steel seamless steel tubes for boilers and heat exchangers)

GB/T14975-1994 (Stainless steel seamless steel pipe for structure)

GB/T14976-1994 (Stainless steel seamless pipes for fluid transportation)

GB/T5035-1993 (Seamless steel pipe for automobile half shaft casing)

API SPEC5CT-1999 (Specification for Casing and Tubing)