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Nickel Alloy - High Temperature
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These materials are designated to provide unique strength and/or corrosion properties at elevated temperatures (i.e., greater than 1000°F). Major attributes include properties such as high strength, high creep resistance, resistance to softening, or resistance to metal loss at high temperature from oxidation, sulfidation, or carburization. Nickel content ranges from approximately 25 to 60%, with critical amounts of chromium, molybdenum, columbium and titanium added. Major application is in the gas turbine and aerospace industries where properties under conditions of high stress and temperature for long periods of time are required. Alloys produced by ATI Allegheny Ludlum include ALTEMP® alloys A286, HX, 625, and 718.
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Nickel Alloy - High Temperature |
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Alloy (UNS Designation)
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End Use |
Composition nominal wt% |
Specifications |
Density lb/in3 (g/cm3) |
Tensile Strength ksi. (MPa) |
0.2% Yield Strength ksi. (MPa) |
Elong- ation % |
Hardness |
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AL 600™
N06600
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Furnace parts, Heat treatment fixtures, and Restaurant cooking appliances. |
Ni 72.0 min, Cr 14.0-17.0, Fe 6.0-10.0, Mn 1.0 max, C 0.15 max, Cu 0.5 max, Si 0.5 max, S 0.015 max |
ASTM B-168
ASME SB-168
AMS 5540
MIL-N-23228
MIL-T-23227 |
0.304 (8.42) |
80 min (550 min) |
35 min (240 min) |
30 min |
80 Rockwell B |
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AL 601™
N06601
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Heat treat baskets, Muffles, and Retorts |
Ni 58.0-63.0, Cr 21.0-25.0, Mn 1.0 max, Al 1.0-1.7, C 0.10 max, Cu 1.0 max, Si 0.5 max, S 0.015 max, Fe balance |
ASTM B-168
AMS 5870 |
0.291 (8.06) |
80 min (550 min) |
30 min (205 min) |
30 min |
85 Rockwell B |
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AL 625HP™
N06626
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Applications similar to ALTEMP® 625 where extended fatigue life is desired, particularly at low cycle |
Ni 58.0 min, Cr 20.0-23.0, Fe 5.0 max, Mo 8.0-10.0, (Cb+Ta) 3.15-4.15, Ti 0.40 max, Al 0.40 max, Co 1.0 max, N 0.02 max, Mn 0.5 max, C 0.03 max, Cu 0.5 max, Si 0.15 max, S 0.015 max |
AMS 5879
AMS 5599 |
0.305 (8.44) |
136 (940) |
70 (482) |
46 |
95 Rockwell B |
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AL800™/AL800H™/AL800AT™
N08800/N08810/N08811
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Process piping, Heat treat fixtures, and Furnace parts |
Ni 30.0-35.0, Cr 19.0-23.0, Fe 39.5 min, Mn 1.5 max, Cu 0.75 max, Si 1.0 max, S 0.015 max, Al 0.15-0.60, Ti 0.15-0.60, C 0.10 max (AL 800) C 0.05-0.10 (AL 800H), C 0.06-0.10 (AL 800HT), (Al + Ti) 0.85-1.2 (AL 800HT only) |
ASTM B-409
ASME SB-409
AMS 5871 |
0.290 (8.03) |
80 / 65 / 65 min (550 / 450 / 450 min) |
35 / 25 / 25 min (240 / 170 / 170 min) |
25 / 30 / 30 min |
86 Rockwell B max |
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ALTEMP® 263
N07263
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Land based gas turbines |
Al 0.3-0.6, C 0.04-0.08, Co 19.0-21.0, Cr 19.0-21.0, Cu 0.2 max, Fe 0.7 max, Mn 0.6 max, Mo 5.6-6.1, Si 0.4 max, Ti 1.9-2.4, (Al + Ti) 2.4-2.8, Ni Balance |
AMS 5872, AMS 5886 |
0.302 (8.33) |
150 (heat treated) (1035 ) |
90 (heat treated) (620 ) |
35 |
28 Rockwell C (heat treated) |
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ALTEMP® 625
N06625
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Jet engine nacelles, Engine plumbing, Aircraft ducting, Recuperators, and Thrust reversers |
Ni 58.0 min, Cr 20.0-23.0, Fe 5.0 max, Mo 8.0-10.0, (Cb+Ta) 3.15-4.15, Ti 0.40 max, Al 0.40 max, Co 1.0 max, Mn 0.5 max, C 0.10 max, S 0.015 max |
ASTM B-443
ASME SB-443
AMS 5599
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0.304 (8.42) |
120 min (sheet) / 110 min (Plate) (825 / 760 min) |
60 min (sheet) / 55 min (Plate) (415 / 380 min) |
30 min |
95 Rockwell B |
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ALTEMP® 718
N07718
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Aircraft ducting and engine plumbing |
Ni 50.0-55.0, Cr 17.0-21.0, Mo 2.8-3.3, (Cb + Ta) 4.75-5.50, Ti 0.65-1.15, Al 0.2-0.8, C 0.08 max, Mn 0.35 max, Si 0.35 max, S 0.015 max, P 0.015 max, Co 1.0 max, Cu 0.3 max, B 0.006 max, Fe balance |
ASTM B-670
AMS 5596
AMS 5597 |
0.297 (8.23) |
130 (annealed) / 195 (heat treated) (900/1345) |
65 (annealed) / 175 (heat treated) (450/1170) |
45 (annealed) / 17 (heat treated) |
95 Rockwell B (ann)/43 Rockwell C (HT) |
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ALTEMP® A286
S66286
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Jet engine nacelles (engine pods, Jet engine parts and fastners |
Al 0.35 max, B 0.001-0.01, C 0.08 max, Cr 13.5-16.0, Mn 2.0 max, Mo 1.0-1.5, Ni 24.0-27.0, Si 1.0 max, Ti 1.9-2.35, V 0.1-0.5, Fe Balance |
AMS 5525
AMS 5858 (welding quality) |
0.288 (7.98) |
95 (annealed) / 164 (heat treated) (655 / 1130) |
50 (annealed) / 108 (heat treated) (345 / 745) |
40(annealed) / 25 (heat treated) |
85 Rockwell B (annealed) |
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ALTEMP® HX
N06002
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Jet engine combustion components, combustion cans, heat treating equipment, annular combustion chambers, belts |
Fe 17.0-20.0, Cr 20.5-23.0, Co 0.5-2.5, Mo 8.0-10.0, W 0.2-1.0, C 0.05-0.15, Si 1.0 max, Mn 1.0 max, P 0.04 max, S 0.03 max |
ASTM B-435
ASME SB-435
AMS 5536 |
0.299 (8.28) |
95 min (655 min) |
35 min (240 min) |
35 min |
90 Rockwell B |
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ALTEMP® X-750
N07750
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Gas turbine components, High strength fasteners |
Ni 70.0 min, Cr 14.0-17.0, Fe 5.0-9.0, (Cb + Ta) 0.7-1.2, Ti 2.25-2.75, Al 0.4-1.0, C 0.08 max, Mn 1.0 max, Si 0.5 max, S 0.01 max, Co 1.0 max, Cu 0.5 max |
ASTM B-637
ASME SB-637
AMS 5598 |
0.299 (8.28) |
115 (annealed) / 185 (heat treated) (795 / 1245) |
60 (annealed) / 120 (heat treated) (415 / 825) |
45 (annealed) / 20 (heat treated) |
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