Incoloy 800 Scrap Buyer and Seller
Alloy 800 tube and furnace parts come out of refineries, petrochemical plants and heat-treat shops. With about a third of its weight in nickel, it is worth keeping out of stainless steel lots.
Sell Incoloy 800 Scrap
Tell us the form (tube, pipe, plate, furnace parts), weight, location and any certificates naming 800, 800H or 800HT. A reading with nickel 30 to 35% and no molybdenum or copper points to the 800 family. We review incoming enquiries and respond with relevant next steps.
Buy Incoloy 800 Scrap
Melters can state the quantity, accepted forms and limits on scale, coke and other alloys.
What Are Incoloy 800, 800H and 800HT?
Special Metals describes alloy 800 as an austenitic, solid-solution nickel-iron-chromium alloy for heat and corrosion resistance in service up to about 816°C (1500°F). 800H and 800HT were developed from it for creep-rupture strength: they are annealed at high temperature to give a coarse grain (ASTM 5 or coarser) and have tighter carbon limits. 800HT also restricts aluminium plus titanium to 0.85 to 1.20% and needs a heat treatment of at least 1149°C (2100°F).
The uses listed by Special Metals map directly onto scrap sources: heat-treating baskets, trays and fixtures; radiant tubes, muffles and retorts; chemical and petrochemical heat exchangers and piping; steam/hydrocarbon reformer catalyst tubing, ethylene cracking and convection tubes and pigtails; nuclear steam-generator tubing; and sheathing for electric heating elements.
Alloy 800 is listed with the Incoloy alloys. Incoloy is a trademark of Special Metals Corporation, used here only to identify material.
Incoloy 800, 800H and 800HT Chemical Composition
Limiting composition in weight per cent from Special Metals publications SMC-046 and SMC-047.
| Element | 800 | 800H | 800HT |
|---|---|---|---|
| Nickel | 30.0 to 35.0 | 30.0 to 35.0 | 30.0 to 35.0 |
| Chromium | 19.0 to 23.0 | 19.0 to 23.0 | 19.0 to 23.0 |
| Iron | 39.5 min | 39.5 min | 39.5 min |
| Carbon | 0.10 max | 0.05 to 0.10 | 0.06 to 0.10 |
| Aluminium | 0.15 to 0.60 | 0.15 to 0.60 | 0.25 to 0.60 |
| Titanium | 0.15 to 0.60 | 0.15 to 0.60 | 0.25 to 0.60 |
| Aluminium + titanium | 0.30 to 1.20 | 0.30 to 1.20 | 0.85 to 1.20 |
| ASTM grain size | Not specified | 5 or coarser | 5 or coarser |
| UNS | N08800 | N08810 | N08811 |
| Other limits (800) | Mn 1.50, Si 1.0, Cu 0.75, S 0.015 max |
|---|---|
| W.Nr. | 1.4876 (800); 1.4958 and 1.4959 (800H and 800HT) |
| Density | 7.94 g/cm³ (0.287 lb/in³) |
| Melting range | 1357 to 1385°C |
How Incoloy 800 Scrap Is Identified
| Reading | Points to |
|---|---|
| Nickel 30 to 35%, chromium about 21%, iron balance, no Mo or Cu | Incoloy 800 family |
| Nickel about 42%, molybdenum about 3%, copper about 2% | Incoloy 825 |
| Nickel about 76%, chromium about 15.5% | Inconel 600 |
| Nickel under 25% | Stainless steel, not alloy 800 |
800, 800H and 800HT cannot be separated by XRF: they differ in carbon, in aluminium plus titanium at levels a handheld reading does not resolve well, and in grain size. Heat numbers, tube markings and certificates decide which one a lot is.
Which Customs Heading Applies?
Iron, not nickel, is the largest element in alloy 800. Whether a lot is declared as nickel waste and scrap (7503.00) or under the ferrous waste headings depends on how the destination country classifies it; confirm the line with your customs broker before shipping.
Incoloy 800 Scrap Forms
| Form | Typical source | Note |
|---|---|---|
| Reformer and cracking tubes, pigtails | Refineries and petrochemical plants | Remove coke, scale and attached fittings of other alloys |
| Furnace baskets, trays, muffles, retorts | Heat-treat shops | Often distorted; check for welded-on steel |
| Heat exchanger tube | Chemical and power plants | Keep tube-sheet material separate |
| Heating-element sheath | Appliance makers | Contains the element core; agree treatment first |
What Sets the Price of Incoloy 800 Scrap
- Contained nickel (30 to 35%) and chromium.
- Grade proof, which matters most when a buyer needs 800H or 800HT.
- Scale, coke and attached steel on ex-service parts.
- Lot size and location.
No price list is published; offers are dated.
Related Reading
Incoloy 800 FAQ
What is the difference between Incoloy 800, 800H and 800HT?
The same nickel, chromium and iron. 800H has carbon of 0.05 to 0.10% and a coarse grain; 800HT tightens carbon to 0.06 to 0.10% and aluminium plus titanium to 0.85 to 1.20%, for the highest creep strength.
What are the UNS numbers for alloy 800?
N08800 for 800, N08810 for 800H and N08811 for 800HT.
Can XRF tell 800H from 800HT?
No. The differences are carbon, small aluminium and titanium changes and grain size; certificates and markings decide.
Where does Incoloy 800 scrap come from?
Furnace parts, reformer and cracking tubes, pigtails, heat exchanger tube and heating-element sheath.
Is Incoloy 800 the same as Incoloy 825?
No. Incoloy 825 has more nickel (about 42%) plus molybdenum and copper for corrosion resistance; 800 has neither.
Sources and Review
Figures are quoted as published in these sources; any value we could not confirm has been left out.
- Special Metals Corporation, INCOLOY alloy 800 (SMC-046, Sept 2004): limiting composition, UNS and W.Nr numbers, physical constants, applications and product forms.
- Special Metals Corporation, INCOLOY alloys 800H and 800HT (SMC-047, Sept 2004): comparative composition table, grain size, heat treatment and applications.
- Incoloy 825 and Inconel 600 values as listed on this site.
Published by Mipra Steel, Khetwadi, Mumbai · Last updated