3 j21-serial open-style is Co - Cr - Ni - Mo is a high elastic
alloy, the alloy with high hardness, strength,
elastic limit and energy storage ratio, fatigue strength, small
elastic hysteresis and aftereffect,
nonmagnetic, good wear resistance, seismic resistance of stamping,
excellent corrosion resistance, etc.
Cobalt base alloys can work at temperatures of 400 degrees Celsius
or at low temperatures.
Close to the brand (40KHXM , Elgiloy , NAS604PH,K.R.N , phynox)
Chemical composition %| C | Mn | Si | P | S | Cr |
| 0.07~0.12 | 1.70~2.30 | <0.6 | <0.01 | <0.01 | 17.0~21.0 |
| Co | Ni | Mo | Ce | Fe |
| 39.0~41.0 | 14.0~16.0 | 6.50~7.50 | 0.1~0.15 | Bal |
application:The 3j21 alloy was an old material in the mid-1960s and
has been produced and applied for many years.
It is mainly used for wear-resisting, anti-corrosion, anti-seismic,
non-magnetic, and high intensity of air use
elastic components, such as shaft, wire, spring, spring and diaphragm.
It is also used in the production of special bearings, small
shafts, ball bearings, stamping dies and cutting tools.
| Density (g/cm3) | 8.3 |
| Resistivity (uΩ.m) | 0.9 |
| Magnetic susceptibility | 120~240 |
