Nickel Alloy Pipe Incoloy® 800HT, Alloy 800HT ASTM B407 and ASME SB407
Incoloy Alloy 800HT/800HT/800AT
Alloy 800HT is a Nickel, Chromium alloy that offers excellent strength and resistance to oxidation at high temperatures. Its strength and structure is maintained during exposure to elevated temperatures; which makes this a great Alloy for heat exchangers and nuclear applications, and other high temperature environments. It is very similar to Alloy 800 but has much better creep-rupture strength due to the tight controls of the carbon, aluminium and titanium content.
Specifications
INCOLOY alloy 800H/800HT/800AT is designated as UNS N08810, UNS N08811 and Werkstoff Number 1.4876, 1.4958, 1.4959. It is listed in NACE MR0175 for oil and gas service.
Rod, Bar, Wire, Forgings, and Forging Stock: ASTM B 408, ASME SB 408 (Rod & Bar), ASTM B 564, ASME SB 564 (Forgings), ASME Code Case 1325 (All Product Forms), ASME Code Case 1949 (Forgings), AMS 5766 (Rod & Bar), ISO 9723 (Rod & Bar), ISO 9724 (Wire), ISO 9725 (Forgings), BS 3076NA15 (Rod & Bar), BS 3075NA15 (Wire), VdTÜV 412 (All Products).
Plate, Sheet, and Strip: ASTM A 240, ASTM A 480, ASME SA 240, ASME SA 480 (Plate, Sheet, and Strip), ASTM B 409, ASTM B 906, ASME SB 409, ASME SB 906 (Plate, Sheet, and Strip), ASME Code Case 1325 (All Product Forms), ASME Code Case 2339 (Plate), AMS 5871 (Plate, Sheet, and Strip), BS 3072NA15 (Plate & Sheet), BS 3073NA15 (Strip), VdTÜV 412 (All Products), ISO 6208 (plate, sheet and strip).
Pipe and Tubes: ASTM B 163 & ASME SB 163 (Seamless Condenser & Heat Exchanger Tubes), ASTM B 407, ASTM B 829, ASME SB 407, ASME SB 829 (Seamless Pipe & Tubes), ASTM B 514, ASTM B 775, ASME SB 514, ASME SB 775 (Welded Pipe), ASTM B 515, ASTM B 751, ASME SB 515, ASME SB 751(Welded Tubes), ASME Code Case 1325 (All Product Forms), ASME N-20 (Cold Worked Seamless Condenser and Heat Exchanger Tubes for Nuclear Service), BS 3074NA15 (Seamless Pipe & Tubes), VdTÜV 412 (All Products), ISO 6207 (Seamless Tubing).
Other Product Forms: ASTM B 366 & ASME SB 366 (Fittings)
Chemical Composition
| UNS Designation | N08800 | N08810 | N08811 |
| Incoloy Alloys | 800 | 800H | 800HT |
| Nickel | 30.0 - 35.0 | 30.0 - 35.0 | 30.0 - 35.0 |
| Chromium | 19.0 - 23.0 | 19.0 - 23.0 | 19.0 - 23.0 |
| Iron | 39.5 min. | 39.5 min | 39.5 min. |
| Carbon | 0.10 max | 0.05 - 0.10 | 0.06 - 0.10 |
| Aluminum | 0.15 - 0.60 | 0.15 - 0.60 | 0.25 - 0.60 |
| Titanium | 0.15 - 0.60 | 0.15 - 0.60 | 0.25 - 0.60 |
| Aluminum + Titanium | 0.30 - 1.20 | 0.30 - 1.20 | 0.85 - 1.20 |
| ASTM Grain Size | Not Specified | 5 or Coarser | 5 or Coaser |
INCOLOY 800 / 800H / 800HT SEAMLESS TUBES
