A286 Stainless Steel Round Bar
Grade: A286/UNS S66286
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
A286 stainless steel, also known as Alloy A-286 or UNS S66286, is a precipitation-hardening iron-based austenitic stainless steel developed for high-strength applications requiring excellent mechanical properties at elevated temperatures. It provides a unique combination of high tensile strength, corrosion resistance, oxidation resistance, and excellent creep strength up to approximately 700°C (1300°F). The alloy is widely used in aerospace, gas turbine, automotive, nuclear, and high-performance engineering applications.
The alloy is strengthened through precipitation hardening by additions of titanium, aluminum, and vanadium. Unlike conventional austenitic stainless steels, A286 achieves very high strength through controlled heat treatment, producing fine intermetallic precipitates within the austenitic matrix. This allows the material to maintain high mechanical properties while retaining good ductility and toughness.
A286 stainless steel contains approximately 15% chromium, 25% nickel, and controlled amounts of molybdenum, titanium, aluminum, and vanadium. The high nickel content stabilizes the austenitic structure and improves corrosion resistance, while titanium and aluminum form strengthening precipitates during aging treatment. Molybdenum improves resistance to pitting corrosion and contributes to high-temperature strength.
A286 stainless steel bars are typically supplied in solution-treated condition and aged to achieve the required mechanical properties. Common aging conditions include 1325°F (720°C) and 1400°F (760°C) aging treatments. The alloy provides excellent tensile strength, creep resistance, fatigue strength, and oxidation resistance at elevated temperatures.
Compared with 304 and 316 stainless steels, A286 provides significantly higher strength and superior high-temperature performance. Compared with nickel-based superalloys, A286 offers easier fabrication, better ductility, and lower material cost while maintaining excellent performance.
A286 stainless steel bars are widely used for aerospace fasteners, turbine engine components, compressor parts, high-temperature bolts, springs, shafts, automotive exhaust components, nuclear reactor components, and precision mechanical parts requiring high strength and corrosion resistance.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A453 / A453M Grade 660 | High Temperature Bolting Material |
| ASTM | ASTM A564 / A564M UNS S66286 | Precipitation-Hardening Stainless Steel Bars |
| ASTM | ASTM A638 / A638M Grade 660 | High Temperature Service Bars |
| ASTM | ASTM A276 / A276M UNS S66286 | Stainless Steel Bars and Shapes |
| UNS | S66286 | A286 Stainless Steel Grade |
| AMS | AMS 5731 | A286 Stainless Steel Bar, Wire, Forgings |
| AMS | AMS 5732 | A286 Stainless Steel Bars and Rings |
| JIS | SUS660 | Equivalent Japanese Grade |
| EN | 1.4980 | X5NiCrTiMoVB25-15-2 Stainless Steel |
| DIN | 1.4980 | Equivalent 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 Treatment + Precipitation Aging |
| Solution Treatment Temperature | Approximately 980–1065°C |
| Aging Treatment | 700–760°C Aging |
| Microstructure | Austenitic Matrix with Precipitation Strengthening |
| Surface Condition | Black Surface, Bright Surface, Ground Surface, Polished Surface |
| Dimensional Tolerance | According to ASTM A276 / ASTM A453 |
| Inspection | Chemical Analysis, Tensile Test, Hardness Test, Grain Size Test |
| Supply Condition | Solution Treated / Age Hardened |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.08 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 13.50 – 16.00 |
| Nickel (Ni) | 24.00 – 27.00 |
| Molybdenum (Mo) | 1.00 – 1.50 |
| Titanium (Ti) | 1.90 – 2.35 |
| Aluminum (Al) | 0.35 – 0.75 |
| Vanadium (V) | 0.10 – 0.50 |
| Boron (B) | 0.001 – 0.010 |
| Iron (Fe) | Balance |
Mechanical Properties
Typical Aged Condition (Condition 660)
| Property | Requirement |
| Tensile Strength | ≥ 930 MPa |
| Yield Strength (0.2% Offset) | ≥ 690 MPa |
| Elongation | ≥ 10% |
| Reduction of Area | ≥ 25% |
| Hardness | Approx. 30–40 HRC |
| Condition | Solution Treated + Aged |
High Strength Aging Condition (Typical)
| Property | Typical Value |
| Tensile Strength | 1000–1100 MPa |
| Yield Strength | 700–850 MPa |
| Elongation | 10–18% |
| Operating Temperature | Up to approximately 700°C |
| Industry | Applications |
| Aerospace Industry | Aircraft fasteners, turbine components, engine parts |
| Gas Turbine Industry | Compressor blades, turbine bolts, high-temperature hardware |
| Automotive Industry | Exhaust components, turbocharger parts, high-strength springs |
| Nuclear Industry | Reactor components and high-temperature fasteners |
| Power Generation | High-temperature bolts and structural parts |
| Chemical Industry | High-strength corrosion-resistant components |
| Mechanical Engineering | Shafts, springs, precision fasteners |
A286 stainless steel, also known as Alloy A-286 or UNS S66286, is a precipitation-hardening iron-based austenitic stainless steel developed for high-strength applications requiring excellent mechanical properties at elevated temperatures. It provides a unique combination of high tensile strength, corrosion resistance, oxidation resistance, and excellent creep strength up to approximately 700°C (1300°F). The alloy is widely used in aerospace, gas turbine, automotive, nuclear, and high-performance engineering applications.
The alloy is strengthened through precipitation hardening by additions of titanium, aluminum, and vanadium. Unlike conventional austenitic stainless steels, A286 achieves very high strength through controlled heat treatment, producing fine intermetallic precipitates within the austenitic matrix. This allows the material to maintain high mechanical properties while retaining good ductility and toughness.
A286 stainless steel contains approximately 15% chromium, 25% nickel, and controlled amounts of molybdenum, titanium, aluminum, and vanadium. The high nickel content stabilizes the austenitic structure and improves corrosion resistance, while titanium and aluminum form strengthening precipitates during aging treatment. Molybdenum improves resistance to pitting corrosion and contributes to high-temperature strength.
A286 stainless steel bars are typically supplied in solution-treated condition and aged to achieve the required mechanical properties. Common aging conditions include 1325°F (720°C) and 1400°F (760°C) aging treatments. The alloy provides excellent tensile strength, creep resistance, fatigue strength, and oxidation resistance at elevated temperatures.
Compared with 304 and 316 stainless steels, A286 provides significantly higher strength and superior high-temperature performance. Compared with nickel-based superalloys, A286 offers easier fabrication, better ductility, and lower material cost while maintaining excellent performance.
A286 stainless steel bars are widely used for aerospace fasteners, turbine engine components, compressor parts, high-temperature bolts, springs, shafts, automotive exhaust components, nuclear reactor components, and precision mechanical parts requiring high strength and corrosion resistance.
ASTM / JIS / EN Standards
| Standard System | Standard / Grade | Description |
| ASTM | ASTM A453 / A453M Grade 660 | High Temperature Bolting Material |
| ASTM | ASTM A564 / A564M UNS S66286 | Precipitation-Hardening Stainless Steel Bars |
| ASTM | ASTM A638 / A638M Grade 660 | High Temperature Service Bars |
| ASTM | ASTM A276 / A276M UNS S66286 | Stainless Steel Bars and Shapes |
| UNS | S66286 | A286 Stainless Steel Grade |
| AMS | AMS 5731 | A286 Stainless Steel Bar, Wire, Forgings |
| AMS | AMS 5732 | A286 Stainless Steel Bars and Rings |
| JIS | SUS660 | Equivalent Japanese Grade |
| EN | 1.4980 | X5NiCrTiMoVB25-15-2 Stainless Steel |
| DIN | 1.4980 | Equivalent 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 Treatment + Precipitation Aging |
| Solution Treatment Temperature | Approximately 980–1065°C |
| Aging Treatment | 700–760°C Aging |
| Microstructure | Austenitic Matrix with Precipitation Strengthening |
| Surface Condition | Black Surface, Bright Surface, Ground Surface, Polished Surface |
| Dimensional Tolerance | According to ASTM A276 / ASTM A453 |
| Inspection | Chemical Analysis, Tensile Test, Hardness Test, Grain Size Test |
| Supply Condition | Solution Treated / Age Hardened |
Chemical Composition (%)
| Element | Composition Requirement |
| Carbon (C) | ≤ 0.08 |
| Silicon (Si) | ≤ 1.00 |
| Manganese (Mn) | ≤ 2.00 |
| Phosphorus (P) | ≤ 0.040 |
| Sulfur (S) | ≤ 0.030 |
| Chromium (Cr) | 13.50 – 16.00 |
| Nickel (Ni) | 24.00 – 27.00 |
| Molybdenum (Mo) | 1.00 – 1.50 |
| Titanium (Ti) | 1.90 – 2.35 |
| Aluminum (Al) | 0.35 – 0.75 |
| Vanadium (V) | 0.10 – 0.50 |
| Boron (B) | 0.001 – 0.010 |
| Iron (Fe) | Balance |
Mechanical Properties
Typical Aged Condition (Condition 660)
| Property | Requirement |
| Tensile Strength | ≥ 930 MPa |
| Yield Strength (0.2% Offset) | ≥ 690 MPa |
| Elongation | ≥ 10% |
| Reduction of Area | ≥ 25% |
| Hardness | Approx. 30–40 HRC |
| Condition | Solution Treated + Aged |
High Strength Aging Condition (Typical)
| Property | Typical Value |
| Tensile Strength | 1000–1100 MPa |
| Yield Strength | 700–850 MPa |
| Elongation | 10–18% |
| Operating Temperature | Up to approximately 700°C |
| Industry | Applications |
| Aerospace Industry | Aircraft fasteners, turbine components, engine parts |
| Gas Turbine Industry | Compressor blades, turbine bolts, high-temperature hardware |
| Automotive Industry | Exhaust components, turbocharger parts, high-strength springs |
| Nuclear Industry | Reactor components and high-temperature fasteners |
| Power Generation | High-temperature bolts and structural parts |
| Chemical Industry | High-strength corrosion-resistant components |
| Mechanical Engineering | Shafts, springs, precision fasteners |
