ASTM B535 NO8330 Alloy Steel Seamless Tube Resistant to High Temperatures
ASTM B535 NO8330 Seamless Tube
ASTM B535 NO8330 is a specification for seamless tubes made from a nickel-chromium-molybdenum alloy known as NO8330. This alloy is commonly used in high-temperature and corrosive environments due to its excellent resistance to oxidation and corrosion. The seamless tubes produced in accordance with this specification are typically used in industries such as chemical processing, petrochemical, and power generation. The tubes are manufactured to meet specific dimensional and mechanical properties outlined in the ASTM B535 standard.
Chemical Composition of ASTM B535 N08330
| Element | Content (%) |
|---|---|
| Iron, Fe | 42 |
| Nickel, Ni | 36 |
| Chromium, Cr | 19 |
| Manganese, Mn | 2 |
| Silicon, Si | 1.13 |
| Carbon, C | 0.080 |
| Phosphorous, P | 0.040 |
| Sulfur, S | 0.030 |
Mechanical Properties of ASTM B535 N08330
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength, ultimate | 550 MPa | 79800 psi |
| Tensile strength, yield (@0.2%) | 260 MPa | 37700 psi |
| Modulus of elasticity | 197 GPa | 28600 ksi |
| Poisson’s ratio | 0.27 – 0.30 | 0.27 – 0.30 |
| Elongation at break (in 50 mm) | 40% | 40% |
Thermal Properties of ASTM B535 N08330
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient | 14.4 µm/m°C | 8 µin/in°F |
| Thermal conductivity | 12.5 W/mK | 86.8 BTU in/hr.ft².°F |
Applications of ASTM B535 NO8330 seamless tubes include:
1. Chemical processing: These tubes are widely used in chemical processing industries for handling corrosive chemicals and high-temperature fluids.
2. Oil and gas industry: ASTM B535 NO8330 seamless tubes are used in the oil and gas industry for transporting oil, gas, and other fluids in high-pressure and high-temperature environments.
3. Aerospace industry: These tubes are used in the aerospace industry for manufacturing aircraft components, such as fuel lines, hydraulic systems, and engine components.
4. Power generation: ASTM B535 NO8330 seamless tubes are used in power generation plants for heat exchangers, boilers, and steam turbines.
5. Automotive industry: These tubes are used in the automotive industry for manufacturing exhaust systems, fuel lines, and other components that require high corrosion resistance and heat resistance.
6. Pharmaceutical industry: ASTM B535 NO8330 seamless tubes are used in the pharmaceutical industry for manufacturing process equipment, such as reactors, heat exchangers, and storage tanks.
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