317L Stainless Steel Round Bar
Grade: 317L/UNS S31703
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
317L stainless steel is an austenitic chromium-nickel-molybdenum stainless steel grade with low carbon content, designated as UNS S31703. It is an enhanced version of 316L stainless steel, developed with higher chromium, nickel, and molybdenum contents to provide superior corrosion resistance, especially in aggressive chemical environments. The low carbon content minimizes carbide precipitation during welding, improving resistance to intergranular corrosion after fabrication and welding operations.
The alloy contains increased levels of chromium, nickel, and molybdenum compared with conventional 316L stainless steel. Chromium provides excellent general corrosion resistance through the formation of a passive oxide layer. Nickel maintains the stable austenitic structure and improves toughness and ductility. The higher molybdenum content significantly enhances resistance to pitting and crevice corrosion, particularly in chloride-containing solutions, acids, and chemical processing environments.
317L stainless steel bars are normally supplied in solution annealed condition and can be manufactured through hot rolling, cold drawing, peeling, grinding, and precision machining processes. The material offers excellent weldability, good formability, high toughness, and reliable performance under severe service conditions. It maintains good mechanical properties at both ambient and elevated temperatures.
Due to its outstanding corrosion resistance and durability, 317L stainless steel bars are widely used in chemical processing equipment, pulp and paper industries, pharmaceutical machinery, pollution control systems, marine applications, heat exchangers, pressure vessels, and industrial piping systems. It is especially suitable for environments where improved corrosion resistance compared with 316L stainless steel is required.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S31703 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A479 / A479M – UNS S31703 | Stainless Steel Bars for Pressure Equipment |
| UNS | S31703 | 317L Stainless Steel Grade |
| JIS | JIS G4303 SUS317L | Stainless Steel Bars |
| EN | EN 10088-3 1.4438 | X2CrNiMo18-15-4 Stainless Steel |
| DIN | DIN 1.4438 | 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 1040–1150°C followed by rapid cooling |
| Surface Condition | Black Surface, Bright Surface, Ground Surface, Polished Surface |
| 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) | 18.00 – 20.00 |
| Nickel (Ni) | 11.00 – 15.00 |
| Molybdenum (Mo) | 3.00 – 4.00 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
Mechanical Properties (Annealed Condition)
| Property | Requirement |
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 35% |
| Reduction of Area | ≥ 50% (Typical) |
| Hardness | ≤ 217 HB (Typical) |
| Condition | Solution Annealed |
317L stainless steel bars are widely used in industries requiring enhanced corrosion resistance, especially in environments containing acids, chlorides, and aggressive chemicals.
| Industry | Applications |
| Chemical Industry | Chemical reactors, storage tanks, processing equipment |
| Pulp & Paper Industry | Bleaching equipment, digesters, processing systems |
| Pharmaceutical Industry | Pharmaceutical reactors, clean processing equipment |
| Marine Engineering | Seawater equipment, offshore components |
| Pollution Control | Scrubbers, waste treatment equipment |
| Heat Transfer Industry | Heat exchangers, condensers, cooling systems |
| Oil & Gas Industry | Corrosion-resistant piping and pressure components |
| Mechanical Engineering | Precision machined parts and industrial components |
317L stainless steel is an austenitic chromium-nickel-molybdenum stainless steel grade with low carbon content, designated as UNS S31703. It is an enhanced version of 316L stainless steel, developed with higher chromium, nickel, and molybdenum contents to provide superior corrosion resistance, especially in aggressive chemical environments. The low carbon content minimizes carbide precipitation during welding, improving resistance to intergranular corrosion after fabrication and welding operations.
The alloy contains increased levels of chromium, nickel, and molybdenum compared with conventional 316L stainless steel. Chromium provides excellent general corrosion resistance through the formation of a passive oxide layer. Nickel maintains the stable austenitic structure and improves toughness and ductility. The higher molybdenum content significantly enhances resistance to pitting and crevice corrosion, particularly in chloride-containing solutions, acids, and chemical processing environments.
317L stainless steel bars are normally supplied in solution annealed condition and can be manufactured through hot rolling, cold drawing, peeling, grinding, and precision machining processes. The material offers excellent weldability, good formability, high toughness, and reliable performance under severe service conditions. It maintains good mechanical properties at both ambient and elevated temperatures.
Due to its outstanding corrosion resistance and durability, 317L stainless steel bars are widely used in chemical processing equipment, pulp and paper industries, pharmaceutical machinery, pollution control systems, marine applications, heat exchangers, pressure vessels, and industrial piping systems. It is especially suitable for environments where improved corrosion resistance compared with 316L stainless steel is required.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A276 / A276M – UNS S31703 | Stainless Steel Bars and Shapes |
| ASTM | ASTM A479 / A479M – UNS S31703 | Stainless Steel Bars for Pressure Equipment |
| UNS | S31703 | 317L Stainless Steel Grade |
| JIS | JIS G4303 SUS317L | Stainless Steel Bars |
| EN | EN 10088-3 1.4438 | X2CrNiMo18-15-4 Stainless Steel |
| DIN | DIN 1.4438 | 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 1040–1150°C followed by rapid cooling |
| Surface Condition | Black Surface, Bright Surface, Ground Surface, Polished Surface |
| 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) | 18.00 – 20.00 |
| Nickel (Ni) | 11.00 – 15.00 |
| Molybdenum (Mo) | 3.00 – 4.00 |
| Nitrogen (N) | ≤ 0.10 |
| Iron (Fe) | Balance |
Mechanical Properties (Annealed Condition)
| Property | Requirement |
| Tensile Strength | ≥ 515 MPa |
| Yield Strength (0.2% Offset) | ≥ 205 MPa |
| Elongation | ≥ 35% |
| Reduction of Area | ≥ 50% (Typical) |
| Hardness | ≤ 217 HB (Typical) |
| Condition | Solution Annealed |
317L stainless steel bars are widely used in industries requiring enhanced corrosion resistance, especially in environments containing acids, chlorides, and aggressive chemicals.
| Industry | Applications |
| Chemical Industry | Chemical reactors, storage tanks, processing equipment |
| Pulp & Paper Industry | Bleaching equipment, digesters, processing systems |
| Pharmaceutical Industry | Pharmaceutical reactors, clean processing equipment |
| Marine Engineering | Seawater equipment, offshore components |
| Pollution Control | Scrubbers, waste treatment equipment |
| Heat Transfer Industry | Heat exchangers, condensers, cooling systems |
| Oil & Gas Industry | Corrosion-resistant piping and pressure components |
| Mechanical Engineering | Precision machined parts and industrial components |
