
About Incoloy 800/800H/800HT Flange
Incoloy 800, 800H and 800HT flanges are nickel-iron-chromium alloys known for their superior high temperature strength and resistance to oxidation, corrosion and carburization. The 800H and 800HT versions have enhanced creep and stress rupture properties compared to the base 800 alloy, making them suitable for more demanding high temperature applications. These flanges are widely used in industries such as petrochemical, chemical, power generation and aerospace.
Efficiency leap Precision and stability
Adopting high-performance integrated joints,the CRA series can increase the tempo by 25%,and the productivity can reach a new peak;the vibration suppression algorithm is upgraded to achieve a good anti-shaking effect;the full-parameter DH compensation algorithm and TrueMotion algorithm are supported,and the absolute positioning accuracy is 0.2 ~ 0.4 mm under the change of attitude movement,and the curved motion is precise and stable.

Incoloy 800/800H/800HT Flange Chemical Properties
| Incoloy 800 | Ni | Fe | Cr | Cu | Ti | Al | C | Mn | S | Si |
| 30.0-35.0 | 39.5 min | 19.0-23.0 | .75 max | .15-.60 | .15-.60 | .1 max | 1.5 max | .015 max | 1.0 max | |
| Incoloy 800H | Ni | Fe | Cr | Cu | Ti | Al | C | Mn | S | Si |
| 30.0-35.0 | 39.5 min | 19.0-23.0 | .75 max | .15-.60 | .15-.60 | .05-.10 max | 1.5 max | .015 max | 1.0 max | |
| Incoloy 800HT | Ni | Fe | Cr | Cu | Ti | Al | C | Mn | S | Si |
| 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 |
Incoloy 800/800H/800HT Flange Mechanical Properties
| Grade | Density | Melting Point | Tensile Strength | Yield Strength (0.2%Offset) | Elongation |
| Incoloy 800 | 7.94 g/cm3 | 1350-1400 ℃ | 500 | 205 | 30 - 35 % |
| Incoloy 800H | 7.94 g/cm3 | 1350-1400℃ | 500 | 200 | 30 - 35 % |
| Incoloy 800HT | 7.94 g/cm3 | 1350-1400℃ | 500 | 200 | 30 - 35 % |
Dimensions of Incoloy Alloy 800 / 800H / 800HT Blind Flanges :

| Size in Inch | Size in mm | Outer Diameter | Flange Thickness | Hub OD | Weld Neck OD | Welding Neck Length | Bore | RF Diameter | RF Height | PCD | Weld Face |
|---|---|---|---|---|---|---|---|---|---|---|---|
| A | B | C | D | E | F | G | H | I | J | ||
| 1/2 | 15 | 90 | 9.6 | 30 | 21.3 | 46 | Refer Note | 34.9 | 2 | 60.3 | 1.6 |
| 3/4 | 20 | 100 | 11.2 | 38 | 26.7 | 51 | 42.9 | 2 | 69.9 | 1.6 | |
| 1 | 25 | 110 | 12.7 | 49 | 33.4 | 54 | 50.8 | 2 | 79.4 | 1.6 | |
| 1 1/4 | 32 | 115 | 14.3 | 59 | 42.2 | 56 | 63.5 | 2 | 88.9 | 1.6 | |
| 1 1/2 | 40 | 125 | 15.9 | 65 | 48.3 | 60 | 73 | 2 | 98.4 | 1.6 | |
| 2 | 50 | 150 | 17.5 | 78 | 60.3 | 62 | 92.1 | 2 | 120.7 | 1.6 | |
| 2 1/2 | 65 | 180 | 20.7 | 90 | 73 | 68 | 104.8 | 2 | 139.7 | 1.6 | |
| 3 | 80 | 190 | 22.3 | 108 | 88.9 | 68 | 127 | 2 | 152.4 | 1.6 | |
| 3 1/2 | 90 | 215 | 22.3 | 122 | 101.6 | 70 | 139.7 | 2 | 177.8 | 1.6 | |
| 4 | 100 | 230 | 22.3 | 135 | 114.3 | 75 | 157.2 | 2 | 190.5 | 1.6 | |
| 5 | 125 | 255 | 22.3 | 164 | 141.3 | 87 | 185.7 | 2 | 215.9 | 1.6 | |
| 6 | 150 | 280 | 23.9 | 192 | 168.3 | 87 | 215.9 | 2 | 241.3 | 1.6 | |
| 8 | 200 | 345 | 27 | 246 | 219.1 | 100 | 269.9 | 2 | 298.5 | 1.6 | |
| 10 | 250 | 405 | 28.6 | 305 | 273 | 100 | 323.8 | 2 | 362 | 1.6 | |
| 12 | 300 | 485 | 30.2 | 365 | 323.8 | 113 | 381 | 2 | 431.8 | 1.6 | |
| 14 | 350 | 535 | 33.4 | 400 | 355.6 | 125 | 412.8 | 2 | 476.3 | 1.6 | |
| 16 | 400 | 595 | 35 | 457 | 406.4 | 125 | 469.9 | 2 | 539.8 | 1.6 | |
| 18 | 450 | 635 | 38.1 | 505 | 457.2 | 138 | 533.4 | 2 | 577.9 | 1.6 | |
| 20 | 500 | 700 | 41.3 | 559 | 508 | 143 | 584.2 | 2 | 635 | 1.6 | |
| 24 | 600 | 815 | 46.1 | 663 | 610 | 151 | 692.2 | 2 | 749.3 | 1.6 |

Gnee Steel is a professional manufacturer of various nickel-based alloys. Gnee Steel's product packaging includes steel strapping: pipes with an outer diameter of no more than 3 inches are usually strapped together with polypropylene film to prevent rust during sea transportation, and then fixed with steel straps; wooden boxes/crates: pipes are usually packaged in wooden boxes or crates to protect them during transportation, especially pipes with longer lengths or larger diameters; airworthy export packaging: suppliers usually use standard airworthy export packaging methods, which may include various materials and technologies to protect pipes during transportation; rainproof cloth packaging: prevents external rainwater, seawater, etc. from penetrating into the export wooden box packaging during transportation. Gnee Steel specializes in the production and sale of alloy materials. Gnee Steel's products are widely used in aerospace, chemical, electric power, automotive, nuclear energy and other fields, and can provide customized alloy material solutions according to customer needs. If you need to understand the price of alloy materials or provide customized alloy material solutions, please feel free to contact us for a quote at ss@gneesteel.com





