ASTM A312 UNS S31254 / 254SMO Duplex Stainless Steel Seamless Pipe
ASTM A312 UNS S31254 / 254SMO Duplex Stainless Steel Seamless Pipe
Duplex stainless steels are characterized by their high levels of both ferrite and austenite phases, which give them excellent strength and corrosion resistance. ASTM A312 254SMO / UNS S31254 duplex stainless steel seamless pipes are commonly used in industries such as chemical processing, oil and gas, and pulp and paper. These pipes are made using a seamless manufacturing process, which ensures that they have a uniform wall thickness and smooth surface finish. They are available in various sizes and thicknesses, and can be customized to meet specific requirements.
Equivalent Grade of A312 254SMO Stainless Steel Seamless Pipes
| UNS | EN Number | EN Name | W.Nr. | SS | AFNOR |
| S31254 | 1.4547 | X1CrNiMoCuN20-18-7 | 1.4529 | 2378 | Z1 CNDU 20.18.06AZ |
Chemical Composition of ASTM A312 254SMO Stainless Steel Seamless Pipes
| C | Si | Mn | P | S | Cr | Ni | Mo | N | Cu |
| ≤0.020 | ≤0.80 | ≤1.00 | ≤0.030 | ≤0.010 | 20 | 18 | 6.1 | 0.20 | 0.7 |
Mechanical Properties of ASTM A312 254SMO Stainless Steel Seamless Pipes
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | 680 MPa | 98600 psi |
| Yield strength | 300 MPa | 43500 psi |
| Modulus of elasticity | 195 GPa | 28300 ksi |
| Shear modulus | 75 GPa | 10900 ksi |
| Poisson’s ratio | 0.30 | 0.30 |
| Elongation at break | 50 % | 50 % |
| Hardness, Brinell | 210 | 210 |
The physical properties of ASTM A312 254SMO Stainless Steel Seamless Pipes
| Specific Heat (0-100°C) | 500 | J.kg-1.°K-1 |
| Thermal Conductivity | 14 | W.m -1.°K-1 |
| Thermal Expansion | 16.5 | mm/m/°C |
| Modulus Elasticity | 196 | GPa |
| Electrical Resistivity | 8.5 | μohm/cm |
| Density | 8.0 | g/cm3 |
The Thermal Properties of ASTM A312 254SMO Stainless Steel Seamless Pipes
| Properties | Metric | Imperial |
|---|---|---|
| Thermal expansion co-efficient (@20-100°C/68-212°F) | 16.5 µm/m°C | 9.17 µin/in°F |
| Thermal conductivity | 14 W/mK | 97.2 BTU in/hr.ft².°F |
Apllications
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Saltwater handling
- Tall oil distillation columns
- Flue gas desulfurization scrubbers
- Components used in petroleum production
- Food processing equipment
- Process equipment in chemical industry
- Bleaching equipment in the pulp and paper industry
- Flue-gas cleaning
- Desalination
- Heat exchangers
- Equipment for handling of seawater, such as, seawater cooling, cooling water Pipes, ballast water systems, firefighting systems etc.
- Hydraulic and instrumention tubing
- Equipment in pulp bleaching plants
- Components in gas cleaning systems
- Tanks and pipelines for chemicals with high halide contents
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