Hastelloy X is a high-performance alloy engineered for outstanding strength and resistance to high-temperature oxidation and corrosion. As part of this class of nickel-based superalloys, Hastelloy X is particularly suited for fasteners operating in extreme thermal and mechanical environments. These fasteners are commonly deployed in critical systems such as gas turbine engines, jet engines, nuclear reactors, and industrial furnaces—applications where durability and heat resistance are non-negotiable. Key industries utilizing Hastelloy X include aerospace, defense, power generation, chemical processing, and marine engineering. Whether you require bolts, screws, studs, or custom-designed fasteners for high-stress environments, Nickel Systems offers precision-engineered solutions tailored to meet your exacting specifications.
Contact Nickel Systems today to request a quote and discover how Hastelloy X fasteners can elevate the reliability and longevity of your systems.
Get our technical data and specifications for Hastelloy® X below. Download the Hastelloy® X Technical Data sheet here.
Hastelloy® X Specifications | |
Institute | Standard |
UNS | N06002 |
Sheet, Plate & Strip | AMS 5536, SB 435, B 435 |
Billet, Rod & Bar | AMS 5754, SB 572, B 572, B 472 |
Bare Welding Rods & Wire | SFA 5.14 / A 5.14 (ERNiCrMo-2) AMS 5798 |
Seamless Pipe & Tube | SB 622, B 622 |
Fittings | SB 366, B 366 |
Forgings | AMS 5754 |
DIN | 17742 No. 2.4665 NiCr22Fe18Mo |
Others | NACE MR0175, ISO 15156 |
Hastelloy® X Chemical Composition Table | ||
Element | Percent Composition | Description |
Nickel | 47.0% | Balance |
Chromium | 22.0% | |
Iron | 18.0% | |
Molybdenum | 9.0% | |
Cobalt | 1.5% | |
Tungsten | 0.6% | |
Carbon | 0.1% | |
Manganese | 1.0% | Max |
SIlicon | 1.0% | Max |
Boron | 0.008% | Max |
Niobium | 0.5% | Max |
Aluminum | 0.5% | Max |
Titanium | 0.15% | Max |
Hastelloy X Physical Properties | |||
Density | Temperature | lb/in³ | g/cm³ |
72℉ / 22℃ | 0.297 | 8.22 | |
Melting Range | 2,300 - 2,470℉ / 1,260 - 1,355℃ | ||
Electrical Resistivity | Temperature | μohm-in | μohm-cm |
75℉ / 24℃ | 45.21 | 114.83 | |
100℉ / 38℃ | 45.38 | 115.27 | |
200℉ / 94℃ | 45.89 | 116.56 | |
300℉ / 149℃ | 46.31 | 117.63 | |
400℉ / 205℃ | 46.78 | 118.82 | |
500℉ / 260℃ | 47.20 | 119.88 | |
600℉ / 316℃ | 47.53 | 120.73 | |
700℉ / 371℃ | 47.93 | 121.73 | |
800℉ / 371℃ | 47.93 | 121.73 | |
900℉ / 483℃ | 48.61 | 123.46 | |
1,000℉ / 538℃ | 49.00 | 124.46 | |
1,100℉ / 594℃ | 49.38 | 125.44 | |
1,200℉ / 649℃ | 49.53 | 125.81 | |
1,300℉ / 705℃ | 49.61 | 126.02 | |
1,400℉ / 760℃ | 49.68 | 126.20 | |
1,500℉ / 816℃ | 49.73 | 126.32 | |
1,600℉ / 871℃ | 49.80 | 126.50 | |
1.700℉ / 927℃ | 49.81 | 126.52 | |
1,800℉ / 983℃ | 49.67 | 126.17 | |
1,900℉ / 1,038℃ | 49.59 | 125.96 | |
2,000℉ / 1,094℃ | 49.57 | 125.90 | |
Thermal Conductivity | Temperature | BTU-in/ft.²h-℉ | W/m-℃ |
70℉ / 25℃ | 63 | 9.2 | |
200℉ / 100℃ | 76 | 11.2 | |
500℉ / 200℃ | 98 | 14.1 | |
1,100℉ / 600℃ | 144 | 20.9 | |
1,200℉ / 650℃ | 151 | 21.9 | |
1,300℉ / 700℃ | 159 | 22.8 | |
1,400℉ / 750℃ | 166 | 23.8 | |
1,500℉ / 800℃ | 174 | 24.7 | |
1,600℉ / 850℃ | 182 | 25.7 | |
1,700℉ / 900℃ | 189 | 26.7 | |
Specific Heat | Temperature | Btu/lb.-℉ | J/kg-℃ |
RT | 0.116 | 486 | |
200℉ / 100℃ | 0.117 | 487 | |
400℉ / 200℃ | 0.118 | 484 | |
600℉ / 300℃ | 0.119 | 491 | |
800℉ / 400℃ | 0.123 | 507 | |
1,000℉ / 500℃ | 0.130 | 531 | |
1,200℉ / 600℃ | 0.139 | 564 | |
1,400℉ / 700℃ | 0.151 | 606 | |
1,600℉ /800℃ | 0.167 | 657 | |
1,800℉ / 900℃ | 0.186 | 716 | |
2,000℉ / 1,000℃ | 0.205 | 784 | |
Mean Coefficient of Thermal Expansion | Temperature | μin/in.-℉ | x10^(-6)m/m-℃ |
79 - 200℉ / 26 - 100℃ | 7.7 | 13.9 | |
79 - 1,000℉ / 26 - 500℃ | 8.4 | 15.0 | |
79 - 1,200℉ / 26 - 500 ℃ | 8.6 | 15.3 | |
79 - 1,350℉ / 26 - 700℃ | 8.8 | 15.7 | |
79 - 1,400℉ / 26 - 750℃ | 8.9 | 15.9 | |
79 - 1,500℉ / 26 - 800℃ | 8.9 | 16.0 | |
79 - 1,600℉ / 26 - 850℃ | 9.1 | 16.2 | |
79 -1,650℉ / 26 - 850℃ | 9.1 | 16.4 | |
79 - 1,800℉ / 26 - 975℃ | 9.2 | 16.6 | |
Dynamic Modulus of Elasticity | Temperature | 10³ksi | GPa |
RT | 29.8 | 205 | |
200℉ / 100℃ | 29.4 | 202 | |
400℉ / 200℃ | 28.6 | 198 | |
600℉ / 300℃ | 27.8 | 192 | |
800℉ / 400℃ | 26.7 | 187 | |
1,000℉ / 500℃ | 25.8 | 180 | |
1,200℉ / 600℃ | 24.7 | 173 | |
1,400℉ / 700℃ | 23.3 | 165 | |
1,600℉ / 800℃ | 22.2 | 157 | |
1,800℉ / 900℃ | 22.2 | 157 | |
Poisson's Ratio | -108℉ / -78℃ | 0.328 | 0.328 |
72℉ / 22℃ | 0.32 | 0.32 | |
Magnetic Permeability | RT | 1.002 at 200 oersteds (15,900 A/m) | |
Hastelloy X Plate Mechanical Properties | |||
Temperature | 0.2% Yield Strength | Ultimate Tensile Strength | Elongation |
70℉ / 21℃ | 49.3ksi / 340MPa | 110.2ksi / 760MPa | 48.9 |
1,000℉ / 538℃ | 32.5ksi / 224MPa | 87.6ksi / 604MPa | 60.2 |
1,200℉ / 649℃ | 30.7ksi / 212MPa | 80.9ksi / 558MPa | 63.5 |
1,400℉ / 760℃ | 31.6ksi / 218MPa | 61ksi / 421MPa | 74.5 |
1,600℉ / 871℃ | 27.4ksi / 189MPa | 37ksi / 255MPa | 98.1 |
1,800℉ / 982℃ | 13.6ksi / 94MPa | 20ksi / 138MPa | 98.1 |
2,000℉ / 1,093℃ | 6.5ksi / 45MPa | 10.4ksi / 72MPa | 95.3 |
Hastelloy X is a nickel based superalloy in the nickel-chromium-iron-molybdenum family. It is known for its excellent high-temperature strength, oxidation resistance, and fabricability. It’s primarily used in environments that require durability at elevated temperatures, such as aerospace, gas turbines, and industrial furnaces.
Hastelloy® X fasteners are used in demanding, high-temperature environments where corrosion resistance, oxidation resistance, and mechanical strength are critical. Check out some applications and their descriptions below using Hastelloy® X fasteners.
The Aerospace industry uses Hastelloy® X fasteners because of their high strength and thermal stability up to 2,200℉ (1,200℃). Socket head cap screws secure turbine engine casings and afterburner mounting. They also use hex head bolts and finished hex nuts for combustion liners and heat shields. They also use hex head bolts and finished hex nuts in combustion liners and heat shields.
The Power Generation Industry uses Hastelloy® X fasteners because of their excellent oxidation resistance and creep strength under thermal cycling. It uses fully threaded studs for flange to flange connections in hot sections and flat washers to distribute load and minimize thermal distortion.
The Chemical Processing industry uses Hastelloy® X fasteners to resist oxidizing and reducing agents in high-temperature chemical flows. Socket head cap screws and set screws to secure internal components. Heavy hex bolts and heavy hex nuts are bolted to external flanges and joints exposed to aggressive media.
Hastelloy® X fasteners are specialty components used where both high heat and corrosive environments are present. Specific fastener types—hex head bolts, socket head cap screws, and finished hex nuts—are chosen based on the mechanical load, space constraints, and accessibility within high-performance systems.
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