Hastelloy C-4 Scrap Buyer and Seller
C-4 is the C-type alloy without tungsten, and a melter making C-4 cannot use C-276 returns without picking up tungsten. That is why Mipra Steel lots C-4 on its own.
Sell Hastelloy C-4 Scrap
Tell us the form (plate, pipe, tube, fittings, turnings), weight, location and any certificates. A reading with molybdenum near 16%, chromium near 16% and no tungsten confirms C-4. We review incoming enquiries and respond with relevant next steps.
Buy Hastelloy C-4 Scrap
Melters can state the quantity, accepted forms and limits on tungsten, iron and other residuals.
What Is Hastelloy C-4?
Haynes International calls C-4 a versatile nickel-chromium-molybdenum alloy with very high resistance to heat-affected-zone sensitization: it can be welded without the usual grain-boundary precipitation that weakens corrosion resistance next to a weld. It resists hydrochloric and sulphuric acids and chlorides, both oxidising and non-oxidising acids, and is highly resistant to chloride stress corrosion cracking, pitting and crevice attack.
Chemically, C-4 is close to C-276 in chromium and molybdenum but drops the tungsten and holds iron lower. Haynes lists it as sheet, plate, strip, bar, pipe and tube, fittings, forgings and welding consumables, so scrap comes as fabrication trim, pipe and fittings from chemical plant, and turnings.
C-4 is listed with the Hastelloy alloys. HASTELLOY is a trademark of Haynes International, used here only to identify material.
Hastelloy C-4 Chemical Composition
Nominal composition in weight per cent from the Haynes International data sheet for HASTELLOY C-4 alloy (H-2007F).
| Element | Symbol | Nominal wt% |
|---|---|---|
| Nickel | Ni | Balance (about 65) |
| Chromium | Cr | 16 |
| Molybdenum | Mo | 16 |
| Iron | Fe | 3 max |
| Cobalt | Co | 2 max |
| Manganese | Mn | 1 max |
| Titanium | Ti | 0.7 max |
| Copper | Cu | 0.5 max |
| Silicon | Si | 0.08 max |
| Carbon | C | 0.01 max |
| UNS | N06455 |
|---|---|
| Density | 8.64 g/cm³ (0.312 lb/in³) |
| Product forms | Sheet, plate, strip, billet, rod, bar, pipe and tube, fittings, forgings, welding wire and electrodes |
How Hastelloy C-4 Scrap Is Identified
| Reading | Points to |
|---|---|
| Mo about 16%, Cr about 16%, no tungsten, Fe 3% or less | Hastelloy C-4 |
| Mo about 16%, Cr about 15.5%, W about 3.75%, Fe about 5.5% | Hastelloy C-276 |
| Cr about 22%, Mo about 13%, W about 3% | Hastelloy C-22 |
| Mo about 28%, little chromium | Hastelloy B-2 or B-3 |
Handheld XRF reads tungsten easily, so a C-4 lot with tungsten in the reading contains C-276 or C-22 and should be re-sorted.
What Sets the Price of Hastelloy C-4 Scrap
- Contained nickel and molybdenum (about 80% of the weight together).
- Grade proof: no tungsten in the readings.
- Form: plate and pipe above turnings.
- Process deposits, linings and attached steel on ex-service equipment.
- Lot size.
No price list is published; offers are dated.
Hastelloy C-4 Scrap Import and Export
C-4 scrap is declared under heading 7503.00, nickel waste and scrap. See importing into India and selling Hastelloy scrap.
Related Reading
Hastelloy C-4 FAQ
What is Hastelloy C-4?
A nickel-chromium-molybdenum alloy, UNS N06455, with about 16% chromium and 16% molybdenum and no tungsten, designed to resist sensitization when welded.
What is the difference between Hastelloy C-4 and C-276?
Similar chromium and molybdenum, but C-276 carries about 3.75% tungsten and more iron. C-4 has no tungsten and iron limited to 3%.
What is the UNS number of Hastelloy C-4?
UNS N06455.
Can C-4 scrap be mixed with C-276?
Only at the lower value. A melter making C-4 cannot absorb tungsten from C-276 returns, so mixed lots are discounted.
Which HS code applies to Hastelloy C-4 scrap?
Heading 7503.00, nickel waste and scrap.
Sources and Review
Figures are quoted as published in these sources; any value we could not confirm has been left out.
- Haynes International, HASTELLOY C-4 alloy data sheet (H-2007F, 2023): nominal composition, UNS number, density, principal features and product forms.
- Hastelloy C-276, C-22 and B-2 values as listed on this site.
Published by Mipra Steel, Khetwadi, Mumbai · Last updated