Description: AFM #21 Cobalt offers excellent high temperature strength and stability. The addition of molybdenum gives it work hardening capability, making AFM #21 Cobalt excellent for hit trimming dies, extrusion dies and hot shears. It has good anti-galling properties and excellent resistance to cavitation erosion and corrosion thereby making AFM #21 Cobalt an excellent choice for fluid seats.
Typical Applications: Hot forming dies, hot working tools, pump shafts, high pressure-high temperature valves, valve seats, mixer blades, mill cutters, pump mill screws, gas turbines.
Chemical Composition Requirements (%):
| ( C ) |
Carbon |
0.15 to 0.40 |
| ( Co ) |
Cobalt |
BAL |
| ( Cr ) |
Chromium |
25.0 to 30.0 |
| ( Fe ) |
Iron |
5.0 |
| ( Mn ) |
Manganese |
2.0 |
| ( Mo ) |
Molybtenum |
4.5 to 7.0 |
| ( Ni) |
Nickel |
1.5 to 4.0 |
| ( Si ) |
Silicon |
1.5 |
| ( W ) |
Tungsten |
0.50 |
|
All Other |
1.0 |
|
Available Sizes:
- Bare & Coated: 1/8 (3.2), 5/32 (4.0), 3/16 (4.8), 1/4 (6.4), 5/16 (8.0)
- Wire: .045 (1.2), 1/16 (1.6)
