HAYNES® X-750 alloy
Principal Features
Nominal Composition
Weight % | |
Nickel | 70 Balance |
Chromium | 16.0 |
Iron | 8.0 |
Titanium | 2.5 |
Niobium* + Tantalum | 1 |
Aluminum | 0.8 |
Cobalt | 1 max. |
Manganese | 0.35 max. |
Silicon | 0.35 max. |
Carbon | 0.08 max. |
Stress-Rupture Data
Sheet (AMS 5598)
Test Tempature | Approximate Initial Stress to Produce Rupture in | ||||||
10 h | 100h | 1000 h | |||||
°F | °C | ksi | MPa | ksi | MPa | ksi | MPa |
1100 | 600 | 120 | 825 | 85 | 585 | 71 | 490 |
1200 | 650 | 80 | 550 | 66 | 455 | 50 | 345 |
1300 | 705 | 61 | 420 | 45 | 310 | 29 | 200 |
1400 | 760 | 41 | 285 | 26 | 180 | 15 | 105 |
1600 | 815 | 24 | 165 | 14 | 97 | 7.4 | 51 |
1700 | 870 | 12.5 | 86 | 6.6 | 46 | - | - |
1800 | 925 | 6.5 | 45 | - | - | - | - |
Heat Treatment
Sheet and Strip
1900°F (1040°C)/Bright-anneal + 1350°F (730°C)/8 h/FC to 1150°F (620°C)/8 h/AC
Physical Properties
Physical Property | British Units | Metric Units | ||
Density | RT |
0.298 lb/in.3 |
RT |
8.26 g/cm3 |
Melting Range | 2540-2600°F | - | 1395-1425°C | - |
Thermal Conductivity | 400°F |
82 Btu.in/h.ft2.°F |
200°C | 14.1 W/m.°C |
600°F |
93 Btu.in/h.ft2.°F |
400°C | 16.9 W/m.°C | |
800°F |
107 Btu.in/h.ft2.°F |
600°C | 19.8 W/m.°C | |
1000°F |
120 Btu.in/h.ft2.°F |
700°C | 21.3 W/m.°C | |
1200°F |
132 Btu.in/h.ft2.°F |
800°C | 22.7 W/m.°C | |
1400°F |
147 Btu.in/h.ft2.°F |
900°C | 24.0 W/m.°C | |
Mean Coefficient of Thermal Expansion | RT | - | RT | - |
70-800°F | 7.8 µin/in.°F | 20-500°C | 14.3 µm/m-°C | |
70-1000°F | 8.0 µin/in.°F | 20-600°C | 14.8 µm/m-°C | |
70-1200°F | 8.4 µin/in.°F | 20-700°C | 15.5 µm/m-°C | |
70-1400°F | 8.9 µin/in.°F | 20-800°C | 16.3 µm/m-°C | |
70-1600°F | 9.4 µin/in.°F | 20-900°C | 17.4 µm/m-°C | |
70-1800°F | 9.8 µin/in.°F | 20-1000°C | 17.9 µm/m-°C | |
Electrical Resistivity | 700°F | 47.7 µohm.in | 20°C | 121 µohm.cm |
400°F | 48.8 µohm.in | 200°C | 124 µohm.cm | |
800°F | 50.5 µohm.in | 400°C | 126 µohm.cm | |
1000°F | 51.2 µohm.in | 600°C | 130 µohm.cm | |
1200°F | 51.3 µohm.in | 700°C | 129 µohm.cm | |
1400°F | 50.7 µohm.in | 800°C | 128 µohm.cm | |
1600°F | 49.8 µohm.in | 900°C | 126 µohm.cm | |
Dynamic Modulus of Elasticity | 70°F |
31.0 x 106 psi |
20°C | 214 GPa |
400°F |
29.2 x 106 psi |
200°C | 201 GPa | |
800°F |
27.4 x 106 psi |
400°C | 189 GPa | |
1000°F |
26.7 x 106 psi |
600°C | 184 GPa | |
1200°F |
25.5 x 106 psi |
700°C | 176 GPa | |
1400°F |
24.0 x 106 psi |
800°C | 165 GPa | |
1600°F |
22.1 x 106 psi |
900°C | 152 GPa | |
1800°F |
20.0 x 106 psi |
1000°C | 138 GPa |
RT = Room Temperature
Tensile Data
Sheet (AMS 5598)
Testing Tempature | Yield Strength 0.2% Offset | Ultimate Tensile Strength | Elongation | |||
°F | °C | ksi | MPa | ksi | MPa | % |
RT | RT | 141.1 | 975 | 192.2 | 1325 | 23.6 |
1000 | 538 | 124.9 | 860 | 162.1 | 1120 | 22.2 |
1200 | 649 | 121.1 | 835 | 143.6 | 990 | 5.8 |
1400 | 760 | 92.0 | 635 | 94.3 | 650 | 2.5 |
1600 | 871 | 43.1 | 295 | 52.1 | 360 | 8.0 |
1800 | 982 | 9.1 | 63 | 16.6 | 115 | 42.0 |
Specifications and Codes
Specifications
HAYNES® X-750 alloy (N07750) | |
Sheet, Plate & Strip | AMS 5542AMS 5598 |
Billet, Rod & Bar | AMS 5667AMS 5668AMS 5670AMS 5671AMS 5747 |
Coated Electrodes | - |
Bare Welding Rods & Wire | AMS 5778SFA 5.14/ A 5.14 (ERNiCrFe-8) |
Seamless Pipe & Tube | - |
Welded Pipe & Tube | - |
Fittings | - |
Forgings | AMS 5667AMS 5668AMS 5670AMS 5671AMS 5747SB 637/B 637 |
DIN | No. 2.4669NiCr15Fe7TiAl |
Others | NACE MR0175ISO 15156 |
Codes
HAYNES® X-750 alloy (N07750) | |
MMPDS | 6.3.6 |
Disclaimer
Haynes International makes all reasonable efforts to ensure the accuracy and correctness of the data displayed on this site but makes no representations or warranties as to the data’s accuracy, correctness or reliability. All data are for general information only and not for providing design advice. Alloy properties disclosed here are based on work conducted principally by Haynes International, Inc. and occasionally supplemented by information from the open literature and, as such, are indicative only of the results of such tests and should not be considered guaranteed maximums or minimums. It is the responsibility of the user to test specific alloys under actual service conditions to determine their suitability for a particular purpose.
For specific concentrations of elements present in a particular product and a discussion of the potential health affects thereof, refer to the Safety Data Sheets supplied by Haynes International, Inc. All trademarks are owned by Haynes International, Inc., unless otherwise indicated.