Incoloy Alloy 800 / 800H/ 800HT


Technical Data Sheet

Alloy 800 - The 800 series of alloy (Incoloy 800, 800H and 800HT) are nickel-iron-chromium superalloys that have excellent properties of high temperature strength and resistance to oxidation, carburization and other types of high temperature corrosion. Alloy 800, 800H and 800HT are used in various applications from furnace components, petrochemical furnace cracker tubes to sheathing for electrical heating elements.

Chemical Composition Limits
Weight % Ni Cr Fe C Al Ti Al+Ti
Alloy 800 30-35 19-23 39.5 min 0.10 max 0.15-0.60 0.15-0.60 0.30-1.20
Alloy 800H 30-35 19-23 39.5 0.05-0.10 0.15-0.60 0.15-0.60 0.30-1.20
Alloy 800HT 30-35 19-23 39.5 0.06-0.10 0.25-0.60 0.25-0.60 0.85-1.20
ASTM Grain Size - Alloy 800 is not specified, Alloy 800H is 5 or coarser, Alloy 800HT is 5 or coarser.

Typical Mechanical Properties

Material Temp Hardnes BHN Tensile Strength MPa Yield Strength (0.2% Offset)
°F °C ksi MPa ksi MPa
Alloy 800H and Alloy 800HT 80 27 126 77.8 536 21.7 150
Alloy 800H and Alloy 800HT 800 425   67.5 465 18.8 130
Alloy 800H and Alloy 800HT 1000 540 90 62.7 432 13.0 90
Alloy 800H and Alloy 800HT 1200 650 84 54.8 378 13.5 93
Alloy 800H and Alloy 800HT 1300 705 82 47.7 329 15.8 109
Alloy 800H and Alloy 800HT 1400 760 74 34.2 236 13.1 90
Alloy 800HT is a Trademark of Special Metals Corporation

Availability
 Alloy 800 is available in Bar (Round), Round Bar, Flat Bar, Rod, Plate, Sheet, Strip, Shapes, Forging Stock, Tube and Welding Wire. View Stock List, Plate Stock List or contact Sales for further availability.

Specifications
Alloy 800 - UNS N08800
Alloy 800H - UNS N08810
Alloy 800HT - UNS N08811

Rod ASTM B 408, ASME SB 408, ISO 9723, BS 3076NA15, DIN 17460, EN 10095
Bar AMS 5766, ASTM B 408, ASME SB 408, ISO 9723, BS 3076NA15, DIN 17460, EN 10095
Wire ISO 9724, BS 3075NA15
Forgings AMS 5766, ASTM B564, ASME SB 564, ASME Code Case 1949, ISO 9725, DIN 17460
Plate AMS 5871, ASTM A 240/A 480, ASME SA 240/SA 480, ASTM B 409/B 906, ASME SB 409/SB 906, BS 3072NA15, DIN 17460, EN 10028-7, EN 10095
Sheet AMS 5871, ASTM A 240/A 480, ASME SA 240/SA 480, ASTM B 409/B 906, ASME SB 409/SB 906, BS 3072NA15, DIN 17460, EN 10028-7, EN 10095
Strip AMS 5871, ASTM A 240/A 480, ASME SA 240/SA 480, ASTM B 409/B 906, ASME SB 409/SB 906, BS 3073NA15, DIN 17460, EN 10028-7, EN 10095
Pipe ASTM B 407/B 829, ASME SB 407/SB 829 (Seamless Pipe), BS 3074NA15 (Seamless Pipe), DIN 17459
Tube ASTM B 163, ASME SB 163 (Seamless Condenser & Heat Exchanger Tubes), ASTM B 407/B 829, ASME SB 407/SB 829 (Seamless Tube), ASTM B 515/B 751, ASME SB 515/SB 751 (Welded Tubes), BS 3074NA15 (Seamless Tubes), ISO 6207, DIN 17459
Other ASTM B 366, ASME SB 366 (Fittings) - ASME Code Cases N201 & N254 (All products for nuclear construction), ISO 4955A (General), NACE MR-01-75, AFNOR Z5 NC 35-20, Werkstoff Nr 1.4876, UNS N08810, N08811
All ASME Code Case 1325, SEW 470, VdTUV 412 and 434, Incoloy 800®

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Disclaimer
Every effort is made to ensure that technical specifications are accurate. However, technical specifications included herein should be used as a guideline only. All specifications are subject to change without notice.