Description
GOST 14162-79 12Ch18N9; 08Ch18N10T; 12Ch18N10T Stainless Capillary Tube
Introduction
Stainless steel capillary tubes are widely used in various industries due to their excellent corrosion resistance, high strength, and durability. GOST 14162-79 specifies the requirements for stainless capillary tubes made from steel grades 12Ch18N9, 08Ch18N10T, and 12Ch18N10T. These tubes are known for their exceptional performance in demanding environments and are commonly used in applications where precision and reliability are crucial.
Material and Specification
The GOST 14162-79 standard defines the material and specifications for stainless capillary tubes. The three steel grades covered by this standard are:
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12Ch18N9: This steel grade contains 12% chromium, 18% nickel, and 9% iron. It offers excellent resistance to corrosion and high-temperature oxidation.
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08Ch18N10T: This steel grade contains 8% chromium, 18% nickel, and 10% titanium. It provides enhanced resistance to intergranular corrosion and is suitable for applications involving exposure to aggressive environments.
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12Ch18N10T: This steel grade contains 12% chromium, 18% nickel, and 10% titanium. It offers similar properties to 08Ch18N10T but with a higher chromium content.
The capillary tubes manufactured according to GOST 14162-79 have the following specifications:
- Outer diameter: Ranging from 0.3 mm to 5.0 mm
- Wall thickness: Ranging from 0.05 mm to 0.5 mm
- Length: Customizable according to customer requirements
Key Features
The stainless capillary tubes specified by GOST 14162-79 exhibit several key features, including:
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Corrosion Resistance: These tubes are highly resistant to corrosion, making them suitable for use in aggressive environments, such as chemical processing plants and marine applications.
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High Strength: The stainless steel grades used in these capillary tubes offer excellent mechanical strength, ensuring their durability and reliability in various applications.
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Precision Dimensions: GOST 14162-79 ensures that the capillary tubes meet precise dimensional requirements, allowing for accurate and reliable performance in critical applications.
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Heat Resistance: The stainless steel grades used in these tubes exhibit excellent resistance to high temperatures, making them suitable for applications involving heat transfer or exposure to elevated temperatures.
Chemical Composition
The chemical composition of the stainless steel grades specified in GOST 14162-79 is as follows:
| Steel Grade | Chemical Composition (%) |
|---|---|
| 12Ch18N9 | C: ≤0.12, Cr: 17-19, Ni: 8-10, Si: ≤0.8, Mn: ≤2, P: ≤0.035, S: ≤0.02 |
| 08Ch18N10T | C: ≤0.08, Cr: 17-19, Ni: 9-11, Ti: 0.8-1.2, Si: ≤0.8, Mn: ≤2, P: ≤0.035, S: ≤0.02 |
| 12Ch18N10T | C: ≤0.12, Cr: 17-19, Ni: 9-11, Ti: 0.8-1.2, Si: ≤0.8, Mn: ≤2, P: ≤0.035, S: ≤0.02 |
Mechanical Properties
The mechanical properties of the stainless capillary tubes specified in GOST 14162-79 are as follows:
| Steel Grade | Tensile Strength (MPa) | Yield Strength (MPa) | Elongation (%) |
|---|---|---|---|
| 12Ch18N9 | ≥520 | ≥205 | ≥40 |
| 08Ch18N10T | ≥520 | ≥205 | ≥35 |
| 12Ch18N10T | ≥520 | ≥205 | ≥35 |
Steel Grade and Application
The steel grades specified in GOST 14162-79 are commonly used in various industries and applications, including:
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Chemical Processing: These capillary tubes are suitable for transporting corrosive chemicals and fluids in chemical processing plants.
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Medical Equipment: Due to their precise dimensions and corrosion resistance, these tubes are used in medical equipment, such as catheters and surgical instruments.
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Heat Exchangers: The high-temperature resistance and excellent heat transfer properties of these tubes make them ideal for use in heat exchangers and condensers.
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Aerospace Industry: These capillary tubes find applications in the aerospace industry, particularly in fuel and hydraulic systems, where corrosion resistance and high strength are essential.
Possible Alternative Grades
While GOST 14162-79 specifies the use of specific steel grades, there are alternative grades available in the market that offer similar properties. Some possible alternative grades for stainless capillary tubes include:
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AISI 304: This grade is equivalent to 12Ch18N9 and offers similar corrosion resistance and mechanical properties.
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AISI 321: Equivalent to 08Ch18N10T, this grade provides enhanced resistance to intergranular corrosion and is suitable for high-temperature applications.
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AISI 316Ti: Similar to 12Ch18N10T, this grade contains titanium for improved corrosion resistance and is commonly used in aggressive environments.
It is important to consult with manufacturers or experts to determine the most suitable alternative grade based on specific application requirements.
