Nickel Alloy Haynes 282 SA-HT
Heat-treated state
UNS N07208
SA-HT = high-temperature solution anneal (≈1150 °C) for coarse grain / creep…
Chosen when maximum creep-rupture life above 800 °C matters more than room-temperature ductility or fatigue.
Values for the SA-HT condition
Other Haynes 282 tempers and conditions
Haynes 282 is listed in 8 conditions; see the grade overview at Haynes 282.
Compare all 8 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
SA-HTThis page High-temperature solution anneal (≈1150 °C) for coarse grain / creep… | Chosen when maximum creep-rupture life above 800 °C matters more than room-temperature ductility or fatigue. | 500 | 960 | 55 | 190 HB | 1.4 % IACS |
SADefault Solution annealed | Standard mill-supplied condition for sheet, plate, bar and tube; softest and most formable/weldable state, aged after fabrication. | 550 | 1,010 | 55 | 200 HB | — |
As-welded deposit | Joint condition before post-weld age; 282 tolerates direct aging without strain-age cracking, unlike Waspaloy/R-41. | 560 | 980 | 35 | 205 HB | 1.4 % IACS |
Hot rolled | Intermediate mill condition for heavy plate and billet; normally re-solution annealed before use. | 640 | 1,060 | 40 | 21 HRC | 1.4 % IACS |
investment cast, HIPed and two-step aged | For complex turbine casings/manifolds where wrought forms are impractical; HIP closes porosity but ductility is lower than wrought. | 680 | 950 | 12 | 32 HRC | 1.4 % IACS |
Welded then direct two-step aged | Preferred route for fabricated combustor/exhaust structures: weld in the annealed state, then age the whole assembly. | 700 | 1,120 | 22 | 32 HRC | 1.4 % IACS |
Solution treated and aged | Standard service condition after forming/welding — full γ′ strengthening for creep-loaded turbine hardware. | 720 | 1,150 | 30 | 33 HRC | — |
Cold worked | Used for fastener wire and precision bar where higher as-supplied strength and tight tolerance are needed before aging. | 900 | 1,150 | 20 | 30 HRC | 1.4 % IACS |
What is Haynes 282 SA-HT?
Haynes 282 SA-HT is Haynes 282 heat treated to SA-HT — chosen when maximum creep-rupture life above 800 °C matters more than room-temperature ductility or fatigue. Haynes 282 SA-HT has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 960 MPa (139 ksi) — stronger than 73% of nickel alloy grades. Elongation at break is 55% and the elastic modulus is 217 GPa (31.5 Msi). Haynes 282 SA-HT has a density of 8.27 g/cm³ (0.299 lb/in³), lighter than 56% of nickel alloy grades. It melts at 1,300°C (2,372 °F). SA is the default condition FabDigit quotes; SA-HT is available on request or by drawing note.
Advantages
- Ductile — tolerates forming and impact — 55%, better than 93% of nickel alloy grades
- Readily welded — 88/100, better than 92% of nickel alloy grades
- Forms and bends easily — 78/100, better than 87% of nickel alloy grades
Limitations
- High embodied carbon — 16 kg CO₂/kg, worse than 93% of nickel alloy grades
Haynes 282 SA-HT properties
Typical room-temperature values for Haynes 282 SA-HT; 22 are specific to this condition. Other listed values are Haynes 282 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Haynes 282 SA-HT has a density of 8.27 g/cm³ (0.299 lb/in³), lighter than 56% of nickel alloy grades. It melts at 1,300°C (2,372 °F).
Mechanical15
Haynes 282 SA-HT has a yield strength of 500 MPa (72.5 ksi) and a tensile strength of 960 MPa (139 ksi) — stronger than 73% of nickel alloy grades. Elongation at break is 55% and the elastic modulus is 217 GPa (31.5 Msi).
Thermal5
Haynes 282 SA-HT is rated for continuous service to 930°C (1,706 °F). It conducts heat at 10.2 W/m·K (5.89 BTU/hr·ft·°F), worse than 79% of nickel alloy grades. Thermal expansion is 12.6 µm/m·K (7 µin/in·°F).
Electrical3
Haynes 282 SA-HT conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (75/100), worse than 63% of nickel alloy grades.
Sustainability4
Producing a kilogram of Haynes 282 SA-HT takes about 230 MJ of energy and emits 16 kg of CO₂ — more than 91% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability8
Haynes 282 SA-HT's machinability is poor (22/100, better than 64% of nickel alloy grades); weldability excellent (88/100); formability very good (78/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Haynes 282 SA-HT
Is Haynes 282 easy to machine?
Machine in the solution-annealed state with rigid setups, positive-rake carbide or ceramic tooling, low surface speed, heavy constant feed and flood coolant; aged material work-hardens fast and is best finished by grinding/EDM.
Can Haynes 282 be welded?
Excellent GTAW/PAW/EBW/laser weldability with matching 282 filler — the low Ti+Al level makes it highly resistant to post-weld strain-age cracking, so assemblies can be welded annealed and then directly aged.
Can Haynes 282 be formed, bent or molded?
Cold forms readily as annealed sheet (deep drawing, spinning, roll forming) with intermediate anneals at ~1120–1150 °C; hot work in the 1050–1180 °C range and always re-solution anneal before aging.
What surface finishes work on Haynes 282?
Pickle/grit-blast to remove Cr-rich oxide after annealing, then passivate or electropolish; for extreme hot-gas service apply aluminide diffusion or MCrAlY/TBC coatings — anodizing does not apply.
Haynes 282 chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Cr | 19 – 21 | 20 |
| Co | 9 – 11 | 10 |
| Mo | 8 – 9 | 8.5 |
| Ti | 1.9 – 2.3 | 2.1 |
| Al | 1.38 – 1.65 | 1.5 |
| Fe | ≤ 1.5 | 0.5 |
| Mn | ≤ 0.3 | 0.05 |
| Si | ≤ 0.15 | 0.05 |
| C | 0.04 – 0.08 | 0.06 |
| B | 0 – 0.01 | 0.01 |
| Cu | ≤ 0.1 | — |
| P | ≤ 0.02 | — |
| S | ≤ 0.02 | — |
| Nibalance, nominally ~57 % | balance | — |
Haynes 282 SA-HT — frequently asked
What is Haynes 282 SA-HT used for?
Haynes 282 SA-HT is typically used for gas turbine combustor and hot-section parts, aerospace structural components and additive-manufactured hot-section parts. In short: weldable gamma-prime superalloy; resists strain-age cracking; additive-friendly hot-section alloy.
What is the yield strength of Haynes 282 SA-HT?
Haynes 282 SA-HT has a typical yield strength of 500 MPa (72.5 ksi) and a tensile strength of 960 MPa (139 ksi) — stronger than 73% of nickel alloy grades. Strength varies by condition: see the 8 listed tempers.
Is Haynes 282 SA-HT easy to machine?
Not especially — machinability is rated poor (22/100, better than 64% of nickel alloy grades). Machine in the solution-annealed state with rigid setups, positive-rake carbide or ceramic tooling, low surface speed, heavy constant feed and flood coolant; aged material work-hardens fast and is best finished by grinding/EDM.
Can Haynes 282 SA-HT be welded?
Yes — weldability is rated excellent (88/100). Excellent GTAW/PAW/EBW/laser weldability with matching 282 filler — the low Ti+Al level makes it highly resistant to post-weld strain-age cracking, so assemblies can be welded annealed and then directly aged.
What surface finishes work on Haynes 282 SA-HT?
Pickle/grit-blast to remove Cr-rich oxide after annealing, then passivate or electropolish; for extreme hot-gas service apply aluminide diffusion or MCrAlY/TBC coatings — anodizing does not apply.
Can Haynes 282 SA-HT be formed, bent or molded?
Cold forms readily as annealed sheet (deep drawing, spinning, roll forming) with intermediate anneals at ~1120–1150 °C; hot work in the 1050–1180 °C range and always re-solution anneal before aging.
What is the maximum service temperature of Haynes 282 SA-HT?
Haynes 282 SA-HT is rated for continuous use to about 930°C (1,706 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Haynes 282-SA and Haynes 282-CW?
SA is the default condition — standard mill-supplied condition for sheet, plate, bar and tube; softest and most formable/weldable state, aged after fabrication. CW: used for fastener wire and precision bar where higher as-supplied strength and tight tolerance are needed before aging. Yield strength is 550 MPa in SA versus 900 MPa in CW.
Sources
- HAYNES 282 alloy brochure H-3173 — Haynes International (2020)
- AMS 5951 / AMS 5915 / ASTM B637-class requirements for UNS N07208 — SAE / ASTM (2021)
- ASM Handbook Vol. 1 & Vol. 13B — Superalloys and their corrosion behavior — ASM International (2005)
- Superalloy property compilations (creep, LCF, weldability of 282) — TMS Superalloys proceedings (2016)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.