316N Stainless Steel Round Bar
Grade: 316N/UNS S31651
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
316N stainless steel is an austenitic chromium-nickel-molybdenum stainless steel grade with controlled nitrogen addition, identified as UNS S31651. It is a modified version of 316 stainless steel designed to provide higher mechanical strength while maintaining excellent corrosion resistance. The addition of nitrogen improves the strength of the austenitic structure, especially the yield strength, without significantly reducing ductility and toughness.
The alloy contains chromium, nickel, molybdenum, and nitrogen as the main alloying elements. Chromium provides general corrosion resistance by forming a stable passive oxide film, while nickel stabilizes the austenitic structure and improves toughness. The molybdenum content enhances resistance to pitting and crevice corrosion, particularly in chloride-containing environments such as seawater and chemical processing applications. Nitrogen further improves resistance to localized corrosion and increases mechanical performance.
316N stainless steel bars are normally supplied in solution annealed condition and can be manufactured through hot rolling, cold drawing, peeling, grinding, or precision machining processes. The material offers excellent weldability, good toughness at low temperatures, and reliable performance under demanding service conditions.
Due to its combination of corrosion resistance and increased strength, 316N stainless steel bars are widely used in chemical equipment, marine engineering, pressure vessels, pharmaceutical machinery, heat exchangers, offshore structures, and high-strength stainless steel components. It is especially suitable for applications requiring improved mechanical properties compared with conventional 316 stainless steel.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S31651 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A479 / A479M – UNS S31651 | Stainless Steel Bars for Pressure Equipment |
| UNS | S31651 | Grade designation for 316N stainless steel |
| JIS | JIS G4303 SUS316N | Stainless Steel Bars |
| EN | EN 10088-3 1.4406 | X2CrNiMoN17-13-3 Stainless Steel |
| DIN | DIN 1.4406 | Equivalent European material designation |
Stainless Steel Bar Execution Standards
| Item | Specification |
| Product Type | Stainless Steel 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 Test, Ultrasonic Testing (optional), Dimension Inspection |
| Supply Condition | Annealed, Cold Finished, Machined Condition |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.080 |
| 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 | ≥ 550 MPa |
| Yield Strength (0.2% Offset) | ≥ 240 MPa |
| Elongation (50 mm) | ≥ 30% |
| Reduction of Area | ≥ 35% (cold worked condition reference) |
| Hardness | ≤ 223 HB (typical) |
| Condition | Solution Annealed |
316N stainless steel bars are widely used in industries requiring high corrosion resistance combined with enhanced mechanical strength.
Typical applications include:
| Industry | Applications |
| Chemical Industry | Chemical reactors, pipelines, storage tanks |
| Marine Engineering | Marine shafts, seawater equipment, offshore components |
| Pharmaceutical Industry | Pharmaceutical processing equipment, sterile machinery |
| Food Processing | Hygienic processing equipment and stainless components |
| Pressure Equipment | Pressure vessels, heat exchangers, valves |
| Oil & Gas Industry | Offshore structures and corrosion-resistant components |
| Mechanical Engineering | High-strength fasteners, precision machined parts |
| Power Industry | Condensers, cooling systems, industrial heat exchangers |
316N stainless steel is an austenitic chromium-nickel-molybdenum stainless steel grade with controlled nitrogen addition, identified as UNS S31651. It is a modified version of 316 stainless steel designed to provide higher mechanical strength while maintaining excellent corrosion resistance. The addition of nitrogen improves the strength of the austenitic structure, especially the yield strength, without significantly reducing ductility and toughness.
The alloy contains chromium, nickel, molybdenum, and nitrogen as the main alloying elements. Chromium provides general corrosion resistance by forming a stable passive oxide film, while nickel stabilizes the austenitic structure and improves toughness. The molybdenum content enhances resistance to pitting and crevice corrosion, particularly in chloride-containing environments such as seawater and chemical processing applications. Nitrogen further improves resistance to localized corrosion and increases mechanical performance.
316N stainless steel bars are normally supplied in solution annealed condition and can be manufactured through hot rolling, cold drawing, peeling, grinding, or precision machining processes. The material offers excellent weldability, good toughness at low temperatures, and reliable performance under demanding service conditions.
Due to its combination of corrosion resistance and increased strength, 316N stainless steel bars are widely used in chemical equipment, marine engineering, pressure vessels, pharmaceutical machinery, heat exchangers, offshore structures, and high-strength stainless steel components. It is especially suitable for applications requiring improved mechanical properties compared with conventional 316 stainless steel.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S31651 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A479 / A479M – UNS S31651 | Stainless Steel Bars for Pressure Equipment |
| UNS | S31651 | Grade designation for 316N stainless steel |
| JIS | JIS G4303 SUS316N | Stainless Steel Bars |
| EN | EN 10088-3 1.4406 | X2CrNiMoN17-13-3 Stainless Steel |
| DIN | DIN 1.4406 | Equivalent European material designation |
Stainless Steel Bar Execution Standards
| Item | Specification |
| Product Type | Stainless Steel 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 Test, Ultrasonic Testing (optional), Dimension Inspection |
| Supply Condition | Annealed, Cold Finished, Machined Condition |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.080 |
| 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 | ≥ 550 MPa |
| Yield Strength (0.2% Offset) | ≥ 240 MPa |
| Elongation (50 mm) | ≥ 30% |
| Reduction of Area | ≥ 35% (cold worked condition reference) |
| Hardness | ≤ 223 HB (typical) |
| Condition | Solution Annealed |
316N stainless steel bars are widely used in industries requiring high corrosion resistance combined with enhanced mechanical strength.
Typical applications include:
| Industry | Applications |
| Chemical Industry | Chemical reactors, pipelines, storage tanks |
| Marine Engineering | Marine shafts, seawater equipment, offshore components |
| Pharmaceutical Industry | Pharmaceutical processing equipment, sterile machinery |
| Food Processing | Hygienic processing equipment and stainless components |
| Pressure Equipment | Pressure vessels, heat exchangers, valves |
| Oil & Gas Industry | Offshore structures and corrosion-resistant components |
| Mechanical Engineering | High-strength fasteners, precision machined parts |
| Power Industry | Condensers, cooling systems, industrial heat exchangers |
