Cobalt Alloys
Cobalt Alloys
- Grades
- 30
- Elements tabulated
- 11
Overview
Cobalt-base wear, heat and corrosion resistant alloys — the Stellite and MAR-M families — used for hardfacing and turbine hot-section components.
IMS handles cobalt alloys as both prime material and as arisings recovered from industrial processing. Material is sorted and segregated by grade, so it returns to the melt as a known specification rather than a mixed stream.
Sectors we supply this into
Properties
- Heat Resistant
- Corrosion Resistant
- Wear Resistant
Applications
- Aero Engine Parts
Chemical composition
30 grades · percentage by weight
| Grade | Co | Cr | Ni | W | Mo | C | Fe | B | Cu | Ta | Others |
|---|---|---|---|---|---|---|---|---|---|---|---|
| Stellite® 1 | 50 | 33 | – | 13 | – | 2.5 | – | – | – | – | – |
| Stellite® 3 | 52 | 30 | – | 13 | – | 2.4 | – | 0.1 | – | – | – |
| Stellite® 4 | 53 | 31 | 3.0* | 14 | – | 1.0* | 3.0* | – | – | – | – |
| Stellite® 6 | 66 | 26 | 3.0* | 5 | – | 1 | 3.0* | – | – | – | – |
| Stellite® 7 | 66 | 26 | – | 5 | – | 0.4 | – | – | – | – | – |
| Stellite® 8 (F75) | 63 | 30 | – | – | 6 | 0.2 | – | – | – | – | – |
| Stellite® 12 | 59 | 29 | 3.0* | 9 | – | 1.8 | 2.0* | – | – | – | – |
| Stellite® 19 | 52 | 31 | 3.0* | 10.5 | – | 1.7 | 3.0* | – | – | – | – |
| Stellite® 20 | 45 | 33 | – | 18 | – | 2.5 | – | – | – | – | – |
| Stellite® 21 | 60 | 27 | 2.5* | – | 5.5 | 0.25 | 3.0* | 0.005 | – | – | – |
| Stellite® 23 | 65 | 25 | 1.5 | 5 | – | 0.4 | 2.0* | – | – | – | – |
| Stellite® 25 (L605) | 52 | 20 | 10 | 15 | – | 0.15* | 2.0* | – | – | – | – |
| Stellite® 30 | 50 | 26 | 15 | – | 6 | 0.45* | 2.0* | – | – | – | – |
| Stellite® 31 (X40) | 56 | 25 | 10 | 7 | – | 0.3 | – | – | – | – | – |
| Stellite® X45 | 56 | 25 | 10.5 | 7.5 | 0.5* | 0.3* | 2.0* | – | – | – | 0.015* B |
| Stellite® 100 | 43 | 34 | – | 19 | – | 2 | – | – | – | – | – |
| Stellite® 151 | 65 | 20 | 1.0* | 13 | – | 0.5 | 2.0* | 0.05 | – | – | – |
| Stellite® 188 | 37 | 22 | 22 | 14 | – | 0.1 | 3.0* | – | – | – | 1.25* Mn |
| WI-52 (PWA 653) | 63 | 21 | 1.0* | 11 | – | 0.45* | 1.5 | – | – | – | 2.0 Nb |
| S 816 | 44 | 20 | 20 | 4 | 4 | 0.35 | 5.0* | – | – | – | 4.0 Nb |
| Elgiloy | 40 | 20 | 15 | – | 7 | 0.15 | 17 | – | – | – | 0.04 Be |
| Umco 50 | 50 | 28 | – | – | – | 0.12 | 20 | – | – | – | 0.75 Si, 0.5 Mn |
| Umco 51 | 48 | 28 | – | – | – | – | 20 | – | – | – | 2.0 Nb, 0.7 Si |
| HS Star J | 41 | 32.5 | 2.5* | 17.5 | – | 2.4 | 3 | – | – | – | – |
| MAR M-302 | 57 | 21.5 | – | 10 | – | – | – | – | – | 9 | 0.2 Zr |
| MAR M-322 | 60 | 21.5 | – | 9 | – | 1 | – | – | – | 4.5 | 2.25 Zr, 0.75 Ti |
| MAR M-509 | 50 | 21.5 | 10 | 7 | – | – | 1 | – | – | 3.5 | 0.5 Zr, 0.2 Ti |
| MAR M-918 | 50 | 20 | 20 | – | – | 0.05 | 0.5 | – | – | 7.5 | 0.1 Zr |
| FSX 414 | 48 | 30 | 10.5 | 7 | – | 0.30* | 1.5* | – | – | – | 0.015* B |
| MP35N | 35 | 20 | 35 | – | 10 | – | – | – | – | – | – |
Select grades to compare them side by side, or save them to a shortlist.
* indicates maximum. The figures shown are nominal compositions of the various alloys. Values are reproduced from IMS technical data and are provided for identification purposes; confirm the specification against your own requirement before ordering.
Scroll the table sideways to see all elements, or switch to cards above.
Related materials
Cobalt Iron Alloys
High-permeability cobalt-iron and cobalt-vanadium alloys used in transformer laminations, magnetic cores and electronic assemblies.
8 grades
Nickel Alloys
Corrosion- and heat-resistant nickel-base alloys, including the Hastelloy, Inconel, Incoloy and Nimonic families, used where chemical attack and elevated temperature occur together.
52 grades
Complex Nickel Alloys
Precipitation-hardened and cast nickel superalloys engineered for creep resistance in the hot section of gas turbines and aero engines.
48 grades
Discuss cobalt alloys with IMS.
Tell us the grade, the form and the quantity. We will confirm what we can supply or recover, and the certification that comes with it.