The specifications, applications and benefits of GOST 8734-75 seamless steel pipe (Steel 20)

If you are purchasing steel pipes for mechanical or industrial purposes, especially in Russia, Eastern Europe or CIS countries, the GOST 8734-75 seamless steel pipes recently provided by Haihao Group to Russian customers are a good choice. Below I will introduce you to the specifications, chemical composition, mechanical properties and various application scenarios of GOST 8734-75 seamless steel pipes (This article mainly introduces the seamless steel pipe made by cold forming of No. 20 steel).

What is GOST 8734-75?

GOST 8734-75 is a Soviet-era Russian standard that specifies the dimensions and technical requirements for cold-formed seamless steel tubes. It covers tubes with an outer diameter range of 1 mm to 200 mm and a wall thickness range of 0.2 mm to 22 mm. The cold-forming process ensures greater dimensional accuracy, better surface finish, and higher mechanical strength compared to hot-formed tubes.

GOST 8734-75 20# seamless steel pipes

Chemical And Mechanical Composition of Grade 20 (Steel 20)

According to GOST, the chemical composition of seamless steel pipe we produced for Russian Customer is:

The Mechanical Properties at Room Temperature is:

These values make Grade 20 suitable for medium-load applications with good machinability and weldability.

Advantages of GOST 8734-75 seamless pipes

High dimensional accuracy

The cold deformation process allows tight dimensional tolerances, which is ideal for high-precision mechanical or hydraulic lines.

Smooth inner surface

Reduces fluid resistance, which is particularly important in hydraulic and pneumatic systems.

Good mechanical strength

GOST 8734-75 pipes have sufficient tensile and yield strength for pressure-bearing and structural purposes.

A wide range of size options

Available in a variety of diameters and wall thicknesses to meet specific design requirements.

GOST 8734-75 seamless steel pipes

Applications of GOST 8734-75 Seamless Steel Pipes

These seamless pipes are widely used in:

• Oil and gas transmission systems (low to moderate pressure)
• Heat exchangers and condensers
• Machine-building and automotive components
• Hydraulic and fuel lines
• Industrial piping systems

Where to Buy GOST 8734-75 Seamless Steel Pipes?

If you’re looking for a reliable supplier of GOST-standard pipes, Haihao Group offers both cold-deformed seamless steel pipes and hot-deformed seamless steel pipes in full compliance with GOST 8734-75 and other standard.Our products are tested for mechanical properties, chemical composition, dimensional accuracy, and surface quality. With global shipping capabilities and custom production services, we provide tailored solutions to meet your project requirements.

GOST 8734-75 seamless steel pipes are a trusted choice in industrial and mechanical applications requiring high strength, tight tolerances, and smooth surfaces. When made from Grade 20 carbon steel and cold-deformed to exacting standards, these pipes deliver reliable performance across a range of applications. If you need it,feel free to contact us at any time. Email:sales@haihaogroup.com

Related Article:

Cold-Deformed Seamless Steel Pipe VS Hot-Deformed Seamless Steel Pipe: Which One is Stronger?