GOST 8731 15XM Hot Rolled Seamless Steel Tube For General Purpose
GOST 8731 10Г2 20X 30XCA 15XM 30XMA Seamless Steel Tube Seamless Hot-Rolled Steel Pipes For General Purpose
Material
The GOST 8731 standard specifies the requirements for seamless hot-rolled steel pipes used for general purposes. These pipes are manufactured from high-quality carbon steel, ensuring durability and reliability in various applications.
Specification
The seamless steel tubes and pipes under GOST 8731 are designed to meet specific dimensional and mechanical properties, making them suitable for a wide range of industrial applications. The standard outlines the manufacturing processes, testing methods, and quality assurance measures to ensure compliance with the required specifications.
Key Features
- Seamless Construction: Provides enhanced strength and reliability.
- High Durability: Suitable for high-pressure applications.
- Corrosion Resistance: Offers better performance in harsh environments.
- Versatile Applications: Can be used in various industries, including construction, oil and gas, and manufacturing.
Chemical Composition
| Steel Grade | C (%) | Si (%) | Mn (%) | P (%) | S (%) | Cr (%) | Ni (%) | Mo (%) |
|---|---|---|---|---|---|---|---|---|
| 10Г2 | 0.08-0.12 | 0.17-0.37 | 0.30-0.60 | ≤0.035 | ≤0.025 | - | - | - |
| 20X | 0.17-0.24 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.025 | - | - | - |
| 30XCA | 0.25-0.35 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.025 | 0.30-0.60 | - | - |
| 15XM | 0.12-0.20 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.025 | 0.30-0.60 | 0.30-0.60 | - |
| 30XMA | 0.25-0.35 | 0.17-0.37 | 0.40-0.70 | ≤0.035 | ≤0.025 | 0.30-0.60 | 0.30-0.60 | 0.10-0.20 |
Mechanical Properties
| Steel Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
|---|---|---|---|---|
| 10Г2 | ≥ 245 | 400-540 | ≥ 22 | ≤ 160 |
| 20X | ≥ 245 | 400-540 | ≥ 22 | ≤ 160 |
| 30XCA | ≥ 245 | 400-540 | ≥ 22 | ≤ 160 |
| 15XM | ≥ 245 | 400-540 | ≥ 22 | ≤ 160 |
| 30XMA | ≥ 245 | 400-540 | ≥ 22 | ≤ 160 |
Steel Grade
The GOST 8731 standard includes several steel grades, such as 10Г2, 20X, 30XCA, 15XM, and 30XMA, each designed for specific applications and performance requirements.
Application
These seamless steel pipes are widely used in various industries, including:
- Construction: Structural components and frameworks.
- Oil and Gas: Pipelines and drilling equipment.
- Manufacturing: Machinery and equipment parts.
- Automotive: Chassis and structural components.
Possible Alternative Grades
While GOST 8731 specifies certain grades, alternative grades may be considered based on specific requirements, including:
- ASTM A106: Standard specification for seamless carbon steel pipes.
- API 5L: Specification for line pipe used in pipeline transportation systems.
- EN 10216: European standard for seamless steel tubes for pressure purposes.
Haiyan Sanxin Steel Pipe Factory is a leading manufacturer of steel pipes in China. Located in a region with excellent geographical advantages, the factory is situated close to the Zhoushan Port and Ningbo Port.
Our factory covers an area of more than 25,000 square meters and has been in the steel pipe manufacturing business for 20 years. Over this period, we have accumulated a wealth of professional experience, which has helped us establish ourselves as a trusted name in the industry.
At our factory, we specialize in the production of various types of steel pipes, including stainless steel pipe, carbon steel pipe, copper pipe, steel pipe,seamless steel pipe and welded pipe. Our expertise in this field is evident from the 12 patents that we hold, which demonstrate our commitment to innovation and excellence.
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