| Customization: | Available |
|---|---|
| Type: | Coil |
| Standard: | AISI, ASTM, DIN, JIS, GB |
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Stainless steel grade 316LN is an austenitic type of steel that is a low carbon, nitrogen-enhanced version of grade 316 steel. The nitrogen content in this steel provides solid solution hardening, and raises its minimum specified yield strength. It also possesses good resistance to general corrosion and pitting/crevice corrosion.
The chemical composition of grade 316LN stainless steel is outlined in the following table.
| Element | Content (%) |
| Iron, Fe | Balance |
| Chromium, Cr | 16.0-18.0 |
| Nickel, Ni | 10.0-14.0 |
| Molybdenum, Mo | 2.0-3.0 |
| Manganese, Mn | 2.00 |
| Silicon, Si | 1.00 |
| Nitrogen, N | 0.10-0.30 |
| Phosphorous, P | 0.045 |
| Carbon, C | 0.03 |
| Sulfur, S | 0.03 |
| Grade | UNS | DIN | EN | AMS | ASTM | JIS | |
| 316LN | S31653 | 1.4406 | ASTM A182 ASTM A213 ASTM A276 ASTM A358 ASTM A479 |
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The mechanical properties of grade 316LN stainless steel are displayed in the following table.
| Properties | Metric | Imperial |
| Tensile strength | 515 MPa | 74694 psi |
| Yield strength | 205 MPa | 29732 psi |
| Modulus of elasticity | 190-210 GPa | 27557-30457 ksi |
| Poisson's ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 60% | 60% |
| Specific Heat (0-100°C) | 485 | J.kg-1.°K-1 |
| Thermal Conductivity | 16.3 | W.m -1.°K-1 |
| Thermal Expansion | 16.5 | μm/μm/°C |
| Modulus Elasticity | 200 | GPa |
| Electrical Resistivity | 7.4 | Ohm-cm |
| Density | 7.99 | g/cm3 |
Processing method
The austenitic stainless steels, including the 316LN alloy, are routinely fabricated into a variety of shapes ranging from the very simple to very complex. These alloys are blanked, pierced, and formed on equipment essentially the same as used for carbon steel. The excellent ductility of the austenitic alloys allows them to be readily formed by bending, stretching, deep drawing and spinning. However, because of their greater strength and work hardenability, the power requirements for the austenitic grades during forming operations are considerably greater than for carbon steels. Attention to lubrication during forming of the austenitic alloys is essential to accommodate the high strength and galling tendency of these alloys.
The austenitic stainless steels are provided in the mill-annealed condition ready for use. Heat treatment may be necessary during or after fabrication to remove the effects of cold forming or to dissolve precipitated chromium carbides resulting from thermal exposures. For the 316LN alloy the solution anneal is accomplished by heating in the 1900- 2150F (1040-1175C) temperature range followed by air cooling or a water quench, depending on section thickness. 316LN stainless cannot be hardened by heat treatment.
The austenitic stainless steels are considered the most weldable of the stainless steels. They are routinely joined by all fusion and resistance welding processes. Two important considerations for weld joints in these alloys are avoidance of solidification cracking, and preservation of corrosion resistance of the weld and heat-affected zones. 316LN stainless steel often is welded autogenously. If filler metal must be used for welding 316LN stainless, it is advisable to utilize the low carbon 316L. Contamination of the weld region with copper or zinc should be avoided, since these elements can form low melting point compounds, which in turn can create weld cracking.
Grade 316LN stainless steel is widely used in the following applications:
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