317LN ss is a low-carbon, nitrogen-alloyed austenitic stainless steel used for a variety of applications. This type of stainless steel offers excellent resistance to corrosion and oxidation, making it well-suited for use in corrosive environments. In this article, we will discuss the composition, physical properties, mechanical properties and uses of 317LN stainless steel.
317LN Stainless Steel Composition
317LN steel contains 18% chromium, 13% nickel, 3% molybdenum, and 2% nitrogen. It also contains small amounts of iron and carbon. The addition of nitrogens makes this type of stainless steel more resistant to oxidation and corrosion than other types of stainless steel that do not contain nitrogen.
| Element | Content (%) |
|---|---|
| Iron, Fe | 63.43 |
| Chromium, Cr | 18.2 |
| Nickel, Ni | 14 |
| Molybdenum, Mo | 4.2 |
| Nitrogen, N | 0.15 |
| Carbon, C | 0.02 |
317LN Stainless Steel Physical Properties
The physical properties of ss 317LN include a melting point range between 1420°C – 1450°C (2590°F – 2650°F). It has a density of 7.95 g/cm3 (0.2851 lb/in3) at room temperature. Additionally, this type of stainless steel has an electrical resistivity between 0.74–0.83 μΩ·m (68–75 μΩ·in) at 20°C (68°F).
317LN Stainless Steel Mechanical Properties
The mechanical properties of 317LN SS include a yield strength range between 230–310 MPa (33–45 ksi), an ultimate tensile strength range between 800–1000 MPa (116–145 ksi), an elongation range between 40–50%, and a hardness range from 200 HBW to 250 HBW depending on the heat treatment applied to the material.
| Properties | Metric | Imperial |
|---|---|---|
| Tensile strength | ≥590 MPa | ≥85600 psi |
| Yield strength | ≥285 MPa | ≥41300 ksi |
| Modulus of elasticity | 200 GPa | 29000 ksi |
| Shear modulus | 77 GPa | 11200 ksi |
| Poissons ratio | 0.299 | 0.299 |
| Elongation at break | ≥40% | ≥40% |
317LN Stainless Steel Equivalent
- Chemical and petrochemical industries
- Pollution control equipments
- Chemical tankers
317LN Stainless Steel Uses
Due to its excellent resistance to oxidation and corrosion as well as its high strength levels, 317LN stainless steel is widely used in many industries such as food processing equipment, marine applications, medical applications, nuclear power plants, petrochemical plants, chemical processing equipment and oil & gas production equipment. Additionally, it can be used in architectural components such as handrails and cladding due to its superior aesthetic qualities compared to other materials like aluminium or brass.
Conclusion
In conclusion, 317LN Stainless Steel is an austenitic alloy with excellent resistance to corrosion and oxidation, which makes it ideal for use in corrosive environments such as food processing equipment or marine applications, as well as architectural components due to its superior aesthetic qualities over other materials like aluminium or brass. It also has excellent mechanical properties, including a yield strength range between 230-310 MPa (33-45 ksi) with an ultimate tensile strength range between 800-1000 MPa (116-145 ksi). If you are looking for a material that is strong yet resistant to corrosion, then consider using 317LN stainless steel!
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