George Metals, located in Houston, USA, is a reliable manufacturer and supplier of Incoloy 800HT Forgings. This high-performance nickel-iron-chromium alloy is designed for exceptional strength at high temperatures, along with outstanding structural stability and resistance to oxidation. Incoloy 800HT (UNS N08811) is a specially modified version of Incoloy 800H, featuring tighter controls on carbon, aluminum, and titanium to boost its creep and rupture resistance. George Metals crafts precision-forged components like shafts, flanges, rings, discs, and custom shapes, all while adhering to standards such as ASTM B564. These forgings find extensive use in industries like petrochemical, power generation, thermal processing, and furnace components.
Incoloy 800HT Forgings from George Metals generally consist of 30–35% nickel, 19–23% chromium, 0.05–0.10% carbon, along with aluminum (~0.3%) and titanium (~0.6%), with iron making up the rest. This specific composition ensures excellent resistance to oxidation, carburization, and sulfidation at temperatures reaching up to 1100°C (2010°F). The alloy boasts a tensile strength of around 600–750 MPa, yield strength of about 300 MPa, and impressive elongation and creep resistance. Delivered in a solution-annealed state, these forgings maintain their mechanical properties even after prolonged exposure to high-heat conditions, making them perfect for applications involving thermal stress.
Specifications ASTM B564 / ASME SB564, AMS 5766
Flat bar blocks up to 27″ width and 15,000 lbs.
Cylinders and sleeves up to 50″ maximum O.D. and 65″ maximum length
Discs and hubs up to 50″ diameter and 20,000 lbs.
Rolled, hand forged or mandrel forged rings up to 84″ maximum O.D. and 40″ maximum length
Rounds, shafts and step shafts up to 144″ maximum length and 20,000 lbs.
| Grade | Ni | Fe | Cr | Cu | Ti | Al | C | Mn | S | Si |
| Alloy 800HT | 30.0-35.0 | 39.5 min | 19.0-23.0 | .75 max | .25-.60 | .85-1.20 | .06-.10 max | 1.5 max | .015 max | 1.0 max |
| Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| 7.94 g/cm3 | 1350-1400 ℃ | Psi – 75,000 , MPa -520 | Psi – 30,000 , MPa – 205 | 30 – 35 % |
| Density | 0.287 lb/in3 / 7.94 g/cm3 |
| Melting Point | 2475 – 2525 °F/ 1357 – 1385 °C |
| Specific Heat @ 70°F | 0.11 Btu/lb•°F |
| Permeability @ 70°F Annealed | 1.014 (200 Oersted) |
| Curie Temperature | -115 °C/ -175 °F |
| Elastic Modulus | 28.50 X 106 psi |
| Electrical Resistivity @ 70°F | 595 ohm•circ mil/ft |
| Annealling Incoloy 800 | 983 – 1038 °C / 1800 – 1900 °F |
| Annealling Incoloy 800H / Ht | 1147 – 1177°C / 2100 – 2150 °F |
| Quench | Rapid Air / Water |
| STANDARD | UNS | WNR. | AFNOR | EN | JIS | BS | GOST | OR |
| Incoloy 800HT | N08811 | 1.4959 | – | X8NiCrAlTi32-21 | NCF 800HT | NA 15(HT) | ЭИ670 | XH32T |
George Metals’ Incoloy 800HT Forgings are extensively utilized in high-temperature industrial settings where both strength and corrosion resistance are paramount. They are commonly found in furnace components, heat exchangers, pressure vessels, reformer outlet manifolds, and catalyst supports within petrochemical processing, power plants, and thermal oxidation systems. The alloy’s remarkable resistance to creep rupture and thermal fatigue makes it an excellent choice for superheaters, reheaters, and process piping that are subjected to both oxidizing and reducing environments. George Metals guarantees precise forging and consistent grain structure, ensuring top-notch quality in every product.
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
George Metals is a leading manufacturer, supplier, and exporter of high-quality bars, rods, and forgings, catering to various industries in Houston, USA
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