316LN Stainless Steel Round Bar
Grade: 316LN/UNS S31653
Size:
Cold drawn: φ4mm-φ60mm
Hot Rolled: φ16mm-φ230mm
Forged: φ230mm-φ1200mm
Surface Finish: Black Annealed, Polished Bright, Centerless Grinding
Diameter Tolerance: H9, H11, h9, h11 etc
- Fast Shipping / Ready Stock
- ISO 9001 Direct Factory
- Custom Cutting & Processing
- 100% MTC & SGS Inspection Supported
316LN stainless steel is an advanced austenitic chromium-nickel-molybdenum stainless steel grade with controlled nitrogen addition, designated as UNS S31653. It is a modified version of 316L stainless steel, developed to provide improved mechanical strength, excellent corrosion resistance, and enhanced structural stability for demanding industrial applications. The addition of nitrogen increases yield strength and improves resistance to localized corrosion while maintaining the low carbon characteristics of 316L.
The alloy contains chromium, nickel, molybdenum, and nitrogen as the primary alloying elements. Chromium provides excellent general corrosion resistance by forming a stable passive oxide film on the surface. Nickel maintains the stable austenitic structure and contributes to excellent toughness and ductility. Molybdenum significantly improves resistance to pitting and crevice corrosion, especially in chloride-containing environments. Nitrogen strengthens the alloy matrix, improves mechanical properties, and enhances resistance to stress corrosion cracking.
316LN stainless steel bars are typically supplied in solution annealed condition and can be produced through hot rolling, cold drawing, peeling, grinding, and precision machining processes. The material provides excellent weldability, high toughness at low temperatures, and reliable long-term performance under severe service conditions.
Due to its combination of low carbon content, nitrogen strengthening, and superior corrosion resistance, 316LN stainless steel bars are widely used in nuclear power plants, chemical processing equipment, marine engineering, pressure vessels, heat exchangers, pharmaceutical machinery, and high-performance mechanical components. It is especially suitable for applications requiring high reliability, corrosion resistance, and improved mechanical strength compared with conventional 316L stainless steel.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S31653 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A479 / A479M – UNS S31653 | Stainless Steel Bars for Pressure Equipment |
| UNS | S31653 | 316LN Stainless Steel Grade |
| JIS | JIS G4303 SUS316LN | Stainless Steel Bars |
| EN | EN 10088-3 1.4429 | X2CrNiMoN17-13-3 Stainless Steel |
| DIN | DIN 1.4429 | Equivalent European Material Designation |
Stainless Steel Bar Execution Standards
| Item | Specification |
| Product Type | Round Bar, Square Bar, Hexagonal Bar |
| Manufacturing Process | Hot Rolled, Cold Drawn, Peeled, Ground, Polished |
| Heat Treatment | Solution Annealing |
| Heat Treatment Temperature | Approximately 1010–1120°C followed by rapid cooling |
| Surface Condition | Black Surface, Bright Surface, Centerless Ground, Polished |
| Dimensional Tolerance | According to ASTM A276 / customer requirements |
| Inspection | Chemical Analysis, Mechanical Testing, Dimensional Inspection |
| Supply Condition | Solution Annealed, Cold Finished, Machined Condition |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.00 – 18.00 |
| Nickel (Ni) | 10.00 – 14.00 |
| Molybdenum (Mo) | 2.00 – 3.00 |
| Nitrogen (N) | 0.10 – 0.16 |
| Iron (Fe) | Balance |
Mechanical Properties (Annealed Condition)
| Property | Requirement |
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Reduction of Area | ≥ 50% (Typical) |
| Hardness | ≤ 217 HB (Typical) |
| Condition | Solution Annealed |
316LN stainless steel bars are widely used in industries requiring excellent corrosion resistance, high reliability, and improved mechanical performance.
| Industry | Applications |
| Nuclear Industry | Reactor components, nuclear piping systems, structural supports |
| Chemical Industry | Chemical reactors, storage tanks, process piping |
| Marine Engineering | Seawater equipment, offshore components, marine structures |
| Pharmaceutical Industry | Sterile processing equipment, pharmaceutical machinery |
| Pressure Equipment | Pressure vessels, heat exchangers, valves |
| Oil & Gas Industry | Corrosion-resistant components and offshore systems |
| Mechanical Engineering | High-strength precision machined components |
| Energy Industry | Cooling systems, thermal equipment, power plant components |
316LN stainless steel is an advanced austenitic chromium-nickel-molybdenum stainless steel grade with controlled nitrogen addition, designated as UNS S31653. It is a modified version of 316L stainless steel, developed to provide improved mechanical strength, excellent corrosion resistance, and enhanced structural stability for demanding industrial applications. The addition of nitrogen increases yield strength and improves resistance to localized corrosion while maintaining the low carbon characteristics of 316L.
The alloy contains chromium, nickel, molybdenum, and nitrogen as the primary alloying elements. Chromium provides excellent general corrosion resistance by forming a stable passive oxide film on the surface. Nickel maintains the stable austenitic structure and contributes to excellent toughness and ductility. Molybdenum significantly improves resistance to pitting and crevice corrosion, especially in chloride-containing environments. Nitrogen strengthens the alloy matrix, improves mechanical properties, and enhances resistance to stress corrosion cracking.
316LN stainless steel bars are typically supplied in solution annealed condition and can be produced through hot rolling, cold drawing, peeling, grinding, and precision machining processes. The material provides excellent weldability, high toughness at low temperatures, and reliable long-term performance under severe service conditions.
Due to its combination of low carbon content, nitrogen strengthening, and superior corrosion resistance, 316LN stainless steel bars are widely used in nuclear power plants, chemical processing equipment, marine engineering, pressure vessels, heat exchangers, pharmaceutical machinery, and high-performance mechanical components. It is especially suitable for applications requiring high reliability, corrosion resistance, and improved mechanical strength compared with conventional 316L stainless steel.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S31653 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A479 / A479M – UNS S31653 | Stainless Steel Bars for Pressure Equipment |
| UNS | S31653 | 316LN Stainless Steel Grade |
| JIS | JIS G4303 SUS316LN | Stainless Steel Bars |
| EN | EN 10088-3 1.4429 | X2CrNiMoN17-13-3 Stainless Steel |
| DIN | DIN 1.4429 | Equivalent European Material Designation |
Stainless Steel Bar Execution Standards
| Item | Specification |
| Product Type | Round Bar, Square Bar, Hexagonal Bar |
| Manufacturing Process | Hot Rolled, Cold Drawn, Peeled, Ground, Polished |
| Heat Treatment | Solution Annealing |
| Heat Treatment Temperature | Approximately 1010–1120°C followed by rapid cooling |
| Surface Condition | Black Surface, Bright Surface, Centerless Ground, Polished |
| Dimensional Tolerance | According to ASTM A276 / customer requirements |
| Inspection | Chemical Analysis, Mechanical Testing, Dimensional Inspection |
| Supply Condition | Solution Annealed, Cold Finished, Machined Condition |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.030 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.045 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 16.00 – 18.00 |
| Nickel (Ni) | 10.00 – 14.00 |
| Molybdenum (Mo) | 2.00 – 3.00 |
| Nitrogen (N) | 0.10 – 0.16 |
| Iron (Fe) | Balance |
Mechanical Properties (Annealed Condition)
| Property | Requirement |
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 40% |
| Reduction of Area | ≥ 50% (Typical) |
| Hardness | ≤ 217 HB (Typical) |
| Condition | Solution Annealed |
316LN stainless steel bars are widely used in industries requiring excellent corrosion resistance, high reliability, and improved mechanical performance.
| Industry | Applications |
| Nuclear Industry | Reactor components, nuclear piping systems, structural supports |
| Chemical Industry | Chemical reactors, storage tanks, process piping |
| Marine Engineering | Seawater equipment, offshore components, marine structures |
| Pharmaceutical Industry | Sterile processing equipment, pharmaceutical machinery |
| Pressure Equipment | Pressure vessels, heat exchangers, valves |
| Oil & Gas Industry | Corrosion-resistant components and offshore systems |
| Mechanical Engineering | High-strength precision machined components |
| Energy Industry | Cooling systems, thermal equipment, power plant components |
