Alloy 282 (UNS N07208) is a wrought, age-hardenable nickel-based superalloy developed to provide an optimal balance of creep strength, thermal stability, and fabricability . Engineered for aerospace and industrial gas turbine applications, it achieves creep strength surpassing Waspaloy and approaching R-41 while maintaining excellent resistance to strain-age cracking—a common limitation of high-strength superalloys .
1. Product Specifications & Physical DataZYTC Alloy supplies UNS N07208 in comprehensive mill forms for critical hot-gas-path components requiring certified high-temperature properties and complete material traceability. Available Forms: Plate, sheet, strip, foil, billet, bar, wire, forging stock, pipe, and tube . Specifications: AMS 5915 (bar/wire), AMS 5951 (strip), ASTM B637, ASME Code Case 3024 (A-USC applications) .
| Chemical Composition (Weight %) | Haynes® 282 Specification |
|---|
| Nickel (Ni) | Balance (approx. 57% min.) | | Chromium (Cr) | 18.5 - 21.5 | | Cobalt (Co) | 9.0 - 11.0 | | Molybdenum (Mo) | 8.0 - 9.0 | | Titanium (Ti) | 1.90 - 2.30 | | Aluminum (Al) | 1.38 - 1.65 | | Iron (Fe) | 1.5 max. | | Manganese (Mn) | 0.30 max. | | Silicon (Si) | 0.15 max. | | Carbon (C) | 0.04 - 0.08 | | Boron (B) | 0.003 - 0.010 |
| Physical Properties | Metric | Imperial |
|---|
| Density | 8.27 - 8.3 g/cm³ | 0.296 - 0.299 lb/in³ | | Modulus of Elasticity (RT) | 216 - 217 GPa | 31.0 - 31.5 × 10³ ksi | | Thermal Conductivity (RT) | 10.3 W/m·K | 72 BTU·in/hr·ft²·°F | | Coefficient of Expansion | 12.1 µm/m·°C (20-538°C) | 6.7 µin/in·°F (70-1000°F) |
| Mechanical Properties (Aged) | Condition | Metric | Imperial |
|---|
| Tensile Strength (RT) | 1850°F/2h/AC + 1450°F/8h/AC | ≥1034 MPa | ≥150 ksi | | Tensile Strength (760°C/1400°F) | Age-hardened | 696 MPa | 101 ksi | | Yield Strength (RT) | Age-hardened | 778-836 MPa | 113-121 ksi | | Yield Strength (760°C/1400°F) | Age-hardened | 463 MPa | 67 ksi | | Elongation (RT) | Age-hardened | 27-34% | 27-34% | | Elongation (760°C/1400°F) | Age-hardened | 27% | 27% |
2. Operating Conditions & Selection BoundariesThis alloy was specifically developed for high-temperature structural applications, particularly in gas turbine engines, where it must withstand significant mechanical loads and aggressive environments . Temperature Range: Designed for continuous service up to 1700°F (927°C). Excels in the 1200-1700°F range, with creep strength surpassing Waspaloy and approaching R-41 . Creep Strength: Exceptional creep resistance across its service range. For example, at 1500°F (816°C), the stress to produce 1% creep in 100 hours is 32 ksi (221 MPa)—equivalent to R-41 and significantly higher than Waspaloy (25 ksi) . Fabricability: Unlike many high-creep-strength alloys, Haynes 282 exhibits outstanding resistance to strain-age cracking. The slower precipitation kinetics of the gamma-prime phase allow for stress relief during welding without cracking . Heat Treatment: Supplied in solution-annealed condition (2050-2100°F / 1121-1149°C) for optimal formability. After fabrication, a standard two-step age hardening treatment (1850°F/2h/AC + 1450°F/8h/AC) develops full strength . Critical Constraint: For Advanced Ultra-Supercritical (A-USC) boiler applications requiring 100,000+ hours creep life at 1400°F (760°C)/14.5 ksi (100 MPa), a different single-step heat treatment (1475°F/8h/AC) per ASME Code Case 3024 is required .
Applications Aerospace & Industrial Gas Turbines: Combustor cans, transition ducts, turbine exhaust components, nozzle assemblies, hot-gas-path hardware, engine cases, rings . Power Generation: Advanced Ultra-Supercritical (A-USC) boiler and steam turbine components, supercritical CO₂ power cycle equipment, concentrating solar power plants requiring 100,000+ hours creep life at 760°C/100 MPa . Automotive: Turbocharger seals and high-temperature springs .
Contact ZYTC Alloy for certified Alloy 282 materials with complete traceability, AMS/ASTM specifications, technical datasheets, and competitive pricing on standard sizes or custom-fabricated components. Email:daisy@zytcsteel.com WhatsApp/WeChat: +86 17335753350 |
