GOST 8732-78 CT20 Hot Rolled Seamless Steel Pipe
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GOST 8732−78 seamless steel Pipes hot-deformed.
GOST 8732-78 is a standard specification that defines the requirements for hot-worked hot rolled seamless carbon steel pipes, specifically intended for use in the oil and gas industry. This article will provide an overview of the material, specification, key features, chemical composition, mechanical properties, steel grade, application, and possible alternative grades related to GOST 8732-78.
GOST 8732-78 is a Russia standard for steel pipes, and it covers the specifications for seamless cold-worked steel pipes used in construction and mechanical applications. The grade CT20 refers to a specific steel grade used within this standard, primarily characterized by its chemical composition and mechanical properties. The pipes are commonly used in various industries, including construction, transportation, and mechanical engineering.
Chemical Composition of GOST 8732-78 Ct20 steel pipes
| Element | Percentage Range |
|---|---|
| Carbon (C) | 0.07-0.14 |
| Manganese (Mn) | 0.35-0.65 |
| Silicon (Si) | 0.17-0.37 |
| Phosphorus (P) | ≤0.035 |
| Sulfur (S) | ≤0.035 |
Please note that the above figures are approximate ranges and may vary slightly depending on the specific grade.
Mechanical Properties of GOST 8732-78 Ct20 steel pipes
| Property | Value |
|---|---|
| Ultimate Tensile Strength (MPa) | ≥490 |
| Yield Strength (MPa) | ≥245 |
| Elongation (%) | ≥24 |
| Hardness | less than 156HB |
GOST 8732-78 Seamless Steel Pipe Seamless Hot-worked Steel Pipes are produced through a hot-working process, ensuring their seamless structure. The standard specifies the following requirements for these pipes:
● Outer diameter range: 10 to 426 millimeters
● Wall thickness range: 1 to 40 millimeters
● Length: Random or specific lengths, depending on customer requirements
Pipes GOST 8732-78
Steel grade 10,20-45, 09G2S, 30HGSA, 40X;
Diameter O 168×6-25,178×6-25,219×6-40,245×7-45,2’13x’1-45,325×8-45,3’1’7×9-20,426×9-20 mm
