SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305
SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304/G4305
Comprehensive material data for SUS316LN stainless steel including chemistry, mechanical, thermal properties, equivalents, and applications.
Hot rolling, cold rolling, forming, welding, machining
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SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Introduction
SUS316LN is a low-carbon, nitrogen-enhanced austenitic stainless steel specified in JIS G4304 (hot-rolled) and JIS G4305 (cold-rolled) standards for plates and coils. The controlled addition of nitrogen (0.12–0.22%) significantly improves yield and tensile strength over conventional 316L while retaining excellent corrosion resistance and weldability. It offers good formability and toughness even at cryogenic temperatures. The chemistry features chromium, nickel, and molybdenum for pitting and crevice corrosion resistance in chloride-containing environments. This grade is widely used in chemical processing, marine, pharmaceutical, and food industries where higher strength and superior corrosion performance are required.
SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Chemical Composition
Chemical composition as specified in JIS G4304 and JIS G4305 for SUS316LN. The nitrogen addition provides increased strength while maintaining good ductility and improving pitting resistance.
| Element | Standard Value | Remarks |
|---|---|---|
| Carbon (C) | ≤ 0.030 | Low carbon for improved intergranular corrosion resistance |
| Silicon (Si) | ≤ 1.00 | - |
| Manganese (Mn) | ≤ 2.00 | - |
| Phosphorus (P) | ≤ 0.045 | - |
| Sulfur (S) | ≤ 0.030 | - |
| Nickel (Ni) | 10.50 – 14.50 | Austenite stabilizer |
| Chromium (Cr) | 16.50 – 18.50 | Provides corrosion resistance |
| Molybdenum (Mo) | 2.00 – 2.50 | Enhances pitting resistance and strength |
| Nitrogen (N) | 0.12 – 0.22 | Strengthens and improves pitting resistance |
SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Thermal and Electrical Physical Properties
Typical physical properties at room temperature unless otherwise stated. Values are representative for annealed SUS316LN and may vary slightly with exact composition and processing.
| Property | Typical Value | Unit | Test Condition / Temperature |
|---|---|---|---|
| Density (ρ) | 7.93 | g/cm³ | 20 °C |
| Elastic Modulus (E) | 193 | GPa | Tension, 20 °C |
| Shear Modulus (G) | 74 | GPa | Calculated, 20 °C |
| Poisson's Ratio (ν) | 0.29 | - | 20 °C |
| Thermal Expansion Coefficient (α) | 16.0 | 10^-6/K | 20–100 °C |
| Thermal Expansion Coefficient (α) | 16.5 | 10^-6/K | 20–200 °C |
| Thermal Expansion Coefficient (α) | 17.0 | 10^-6/K | 20–300 °C |
| Thermal Conductivity (λ) | 15.0 | W/m·K | 100 °C |
| Thermal Conductivity (λ) | 18.0 | W/m·K | 500 °C |
| Specific Heat Capacity | 500 | J/kg·K | 0 – 100 °C |
| Electrical Resistivity (ρe) | 0.74 | μΩ·m | 20 °C |
SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Mechanical Properties
Mechanical properties per JIS G4304 for plates in solution-annealed condition. Requirements vary with product thickness; values shown are minimum requirements unless noted. Bend test applies up to 10 mm thickness.
| Property | Standard Requirement | Unit | Test Condition |
|---|---|---|---|
| Yield Strength (0.2% offset) | ≥ 245 | MPa | Room temperature, tension test |
| Tensile Strength | ≥ 550 | MPa | Room temperature, tension test |
| Elongation | ≥ 40 | % | Thickness ≤ 5 mm, gauge length 50 mm |
| Elongation | ≥ 40 | % | Thickness 5–10 mm, gauge length 50 mm |
| Elongation | ≥ 40 (L=200mm) / ≥ 30 (L=50mm) | % | Thickness 10–28 mm, gauge length as noted |
| Bend Test | No cracks, 180° bend, d = t | - | Thickness ≤ 10 mm, bend diameter = thickness |
SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Exact Equivalent Material Standards and Substitutable Grades
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| USA | ASTM A240/A240M | 316LN (UNS S31653) | Direct equivalent, same chemistry and properties |
| Europe | EN 10088-2, EN 10088-3 | 1.4429 (X2CrNiMoN17-13-3) | Equivalent to SUS316LN |
| China | GB/T 20878, GB/T 3280 | 022Cr17Ni12Mo2N | Equivalent to SUS316LN, formerly 00Cr17Ni13Mo2N |
| International | ISO 15510 | X2CrNiMoN17-13-3 | ISO equivalent grade |
SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Application Introduction
SUS316LN is designed for applications requiring higher strength than standard 316L while maintaining excellent corrosion resistance and weldability. Its nitrogen-strengthened matrix allows thinner sections without sacrificing performance, reducing weight and cost. Typical sectors include: chemical processing equipment, marine and offshore structures, heat exchangers, pressure vessels, and pharmaceutical manufacturing. It is suitable for welded fabrication and can be deep drawn, bent, and machined with appropriate tooling.
Product Applications: Storage tanks for corrosive chemicals, Heat exchanger plates and tubes, Pressure vessels and reactors, Flanges and fittings, Piping systems for aggressive media, Hygienic equipment (dairy pipes, tanks), Structural components in marine environments
Processed into products: Weld neck flanges, Blind flanges, Dished heads, Tube sheets, Baffle plates, Pump casings and impellers, Valve bodies, Fasteners (bolts, nuts) for high-strength requirements, Column trays and internals
Application industries: Chemical and petrochemical processing, Marine and offshore engineering, Food and beverage industry, Pharmaceutical manufacturing, Pulp and paper industry, Heat exchanger and boiler manufacturing, Pressure vessel fabrication
SUS316LN Austenitic Stainless Steel Plate/Coil per JIS G4304 & G4305 Similar / Alternative Materials
| Country/Region | Standard | Grade | Remarks |
|---|---|---|---|
| Japan | JIS G4304/G4305 | SUS316L | Lower strength without nitrogen addition; similar corrosion resistance |
| Japan | JIS G4304/G4305 | SUS317LN | Higher Mo content, better pitting resistance, nitrogen-strengthened |
| USA | ASTM A240 | 316L (UNS S31603) | Non-nitrogen version, lower yield strength |
| Europe | EN 10088-2 | 1.4404 (X2CrNiMo17-12-2) | Equivalent to 316L, not nitrogen strengthened |
Notes:
SUS316LN is typically supplied in solution-annealed condition. For enhanced mechanical properties after fabrication, stress relief or full solution annealing may be reapplied. Welding should be performed with low heat input and filler metals of matching composition (e.g., AWS E316L-16 or ER316L). Post-weld heat treatment is not generally required but may improve stress corrosion cracking resistance in critical environments. Hot working temperatures range from 1150–950 °C, followed by rapid cooling.
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