Haynes 282: Weldable Gamma-Prime Strengthened Nickel Superalloy
· Published: 2026-08-10 · Updated: August 2026
Haynes 282 is a gamma-prime precipitation-hardened nickel-based superalloy developed by Haynes International that combines excellent high-temperature strength with exceptional fabricability and weldability. Its composition includes 20% chromium,...
Haynes 282 is a gamma-prime precipitation-hardened nickel-based superalloy developed by Haynes International that combines excellent high-temperature strength with exceptional fabricability and weldability. Its composition includes 20% chromium, 10% cobalt, 8.5% molybdenum, 2.1% titanium, and 1.5% aluminum. Unlike many highly alloyed superalloys, Haynes 282 is resistant to strain-age cracking during welding and post-weld heat treatment, making it significantly easier to fabricate than Waspaloy or René 41. The alloy exhibits excellent creep strength, thermal stability, and oxidation resistance up to 980°C. It is used in aero-engine components, industrial gas turbines, and chemical processing equipment requiring high-temperature strength combined with good fabricability.
Quick Facts
| Category | |
| Standard | |
| Density | 8.28 g/cm³ |
| Yield Strength | |
| Tensile Strength |
Global Equivalents & Cross-Reference
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Frequently Asked Questions
What is the key advantage of Haynes 282 over other superalloys?
The primary advantage of Haynes 282 is its excellent weldability and resistance to strain-age cracking, combined with high-temperature strength comparable to Waspaloy. This makes it a 'fabrication-friendly' superalloy that can be welded and heat-treated with conventional procedures.
What heat treatment is required for Haynes 282?
Haynes 282 is typically solution annealed at 1121°C (2050°F) for 1 hour, then rapidly cooled. Aging is performed at 788°C (1450°F) for 8 hours, followed by air cooling. This develops the gamma-prime precipitation for optimal strength.
References & International Standards
- ASTM International. Standard Specifications for Steel & Metal Alloys. astm.org
- International Organization for Standardization (ISO). Metallic Materials — Cross-Reference Database. iso.org
- American Iron and Steel Institute (AISI). Steel Grade Designations & Equivalents. steel.org
- European Committee for Standardization (CEN). EN Steel Standards & Numbering System. cencenelec.eu
Specialty Metals — Engineering Reference
Non-ferrous metals — aluminum, copper, titanium, zinc, magnesium — serve applications where steel cannot: electrical conductivity, thermal management, weight reduction, corrosion resistance in specific chemical environments. Each metal family has its own classification system and selection logic.
ASTM B209/B221 (Al), ASTM B152/B187 (Cu), ASTM B265/B348 (Ti), ASTM B86 (Zn), ASTM B90/B91 (Mg)
Electrical wiring and busbars (Cu), aircraft structures and automotive bodies (Al), medical implants and aerospace fasteners (Ti), die-cast consumer products (Zn), lightweight electronic enclosures (Mg)
Galvanic corrosion is the #1 failure mode in multi-metal assemblies. When joining dissimilar metals, consult the galvanic series: the more anodic metal will corrode preferentially. Use isolating washers, protective coatings, or select metals close together on the galvanic series.