WD-Co25
INTRODUCTION
WISDOM WD-Co21 is recommended for applications involving cavitation, erosion, corrosion and/or high temperatures, such as valve trim for petrochemical and power generation. Due to its good impact resistance, it has been widely used in the building up of forging or hot stamping dies.
Common Names: Stellite 21 Polystel 21
Standard: AWS 5.21-2001 ERCoCr-E
CHEMICAL COMPOSITION(%)
|
C |
Si |
Mn |
Mo |
Cr |
W |
Ni |
Fe |
Co |
|---|---|---|---|---|---|---|---|---|
|
0.25 |
1.5 |
≤0.5 |
5.5 |
27.3 |
≤0.5 |
2.0 |
1.5 |
Rest |
CHARACTERISTIC
|
Abrasion Resistance |
Moderate |
|
Impact Resistance |
Excellent |
|
Corrosion Resistance |
Good |
|
Hardness |
HRC 20-40 |
|
Deposit Layers |
Multiple |
|
Deposit Cross Checks |
No |
|
Magnetic |
No |
|
Hot Wear Hardness |
Good |
|
Machinability |
Carbide Tools |
APPLICATIONS
- Used to make various liquid valves, valve seats
- Water turbine blade, hot forging die
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