AMPCO® 21 Centrifugal Castings – Premium Wear-Resistant Alloy
The increase in the Al and Fe content results in a material in which the hard gamma 2 phase (about 400 HB) is present. By correct metallurgical control this hard constituent is uniformly distributed giving this alloy its ability to resist wear.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 7.2 g/cm³ |
Recycled Content | 80 % |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Charpy impact energy | 23.0 °C | 2.7 J | |
Compressive strength | 23.0 °C | 1310 MPa | |
Compressive yield strength, 0.1% | 23.0 °C | 483 MPa | |
Elastic modulus | 23.0 °C | 103 GPa | |
Elongation A5 | 23.0 °C | 1.5 % | |
Hardness, HBW | 23.0 °C | 285 [-] | HBW 10/3000 |
Hardness, Rockwell C | 23.0 °C | 29 [-] | |
Izod impact energy | 23.0 °C | 2.7 J | |
Reduction of area | 23.0 °C | 0.5 % | |
Shear strength | 23.0 °C | 448 MPa | |
Tensile strength | 23.0 °C | 552 MPa | |
Yield strength Rp0.5 | 23.0 °C | 379 MPa |
Thermal
| Property | Temperature | Value |
|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.62E-5 1/K |
Specific heat capacity | 23.0 °C | 420 J/(kg·K) |
Thermal conductivity | 23.0 °C | 42 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 23.0 °C | 6.00E+6 S/m |
Specific Electrical conductivity | 10 % IACS |
Chemical properties
| Property | Value |
|---|---|
Aluminium | 13.1 % |
Copper | Balance |
Iron | 4.4 % |
Other | 2.5 % |
Technological properties
| Property | ||
|---|---|---|
| Application areas | AMPCO® 21 is used for guide port bushings and wear strips replacing hardened steel and for some cams when no impact is involved. However, the largest single use is as die rings, inserts, forming rolls, etc. in forming, bending or drawing operations, especially when stainless steel is the material being processed. AMPCO® 21 is also widely used as work support blades for the centerless grinding of steel rods. | |
Metal
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- AMPCO® 21: High-Performance Sand Castings with Superior Wear Resistance
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- AMPCO® 18 Castings – High Strength, Durability, & Recyclability
- AMPCO® 18.23: Premium Heat‑Treated Sand Castings for Superior Strength and Wear Resistance
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- AMPCO® M4 Centrifugal Castings – Superior Mechanical Properties at Lower Cost
- AMPCO® M4: High‑Performance Sand‑Cast Alloys with Superior Mechanical Properties