Description
GOST 8734-75 St37 Cold Formed Steel Tube
Introduction
GOST 8734-75 is a standard specification for cold-formed steel tubes, which are widely used in various industries for their excellent mechanical properties and durability. This article provides an overview of the material, specification, chemical composition, mechanical properties, and applications of GOST 8734-75 St37 St35.8 1010 360 E235 cold-formed steel tubes.
Material
The material used in GOST 8734-75 St37 St35.8 1010 360 E235 cold-formed steel tubes is a low carbon steel, which ensures good weldability and formability. This type of steel is commonly used in the manufacturing of tubes due to its high strength and resistance to corrosion.
Specification
GOST 8734-75 specifies the requirements for cold-formed steel tubes with specific dimensions and tolerances. The standard covers various grades of steel, including St37, St35.8, 1010, 360, and E235. These grades have different chemical compositions and mechanical properties, making them suitable for different applications.
Chemical Composition
The chemical composition of GOST 8734-75 St37 St35.8 1010 360 E235 cold-formed steel tubes is as follows:
| Grade | Chemical Composition (%) |
|---|---|
| St37 | C: 0.17-0.20, Mn: 0.35-0.65, Si: 0.17-0.37, P: 0.035 max, S: 0.035 max |
| St35.8 | C: 0.17-0.23, Mn: 0.40-0.80, Si: 0.17-0.37, P: 0.035 max, S: 0.035 max |
| 1010 | C: 0.08-0.13, Mn: 0.30-0.60, Si: 0.15-0.35, P: 0.035 max, S: 0.035 max |
| 360 | C: 0.17-0.23, Mn: 0.30-0.60, Si: 0.17-0.37, P: 0.035 max, S: 0.035 max |
| E235 | C: 0.17-0.22, Mn: 0.40-1.20, Si: 0.17-0.37, P: 0.025 max, S: 0.025 max |
Mechanical Properties
The mechanical properties of GOST 8734-75 St37 St35.8 1010 360 E235 cold-formed steel tubes are as follows:
| Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| St37 | 340-470 | 235 min | 25 min |
| St35.8 | 360-480 | 235 min | 25 min |
| 1010 | 430-530 | 275 min | 22 min |
| 360 | 450-550 | 275 min | 22 min |
| E235 | 360-500 | 235 min | 25 min |
Application
GOST 8734-75 St37 St35.8 1010 360 E235 cold-formed steel tubes find applications in various industries, including:
- Construction: These tubes are widely used in the construction of buildings, bridges, and other structures due to their high strength and durability.
- Automotive: Cold-formed steel tubes are used in the manufacturing of automotive components, such as exhaust systems, chassis, and suspension parts.
- Machinery: These tubes are utilized in the production of machinery and equipment, including hydraulic systems, agricultural machinery, and industrial machinery.
- Oil and Gas: GOST 8734-75 cold-formed steel tubes are suitable for oil and gas applications, such as pipelines and drilling equipment, due to their corrosion resistance and high pressure capabilities.
