AMPCO® 21: High‑Performance Extruded & Drawn Rounds & Bars
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 proper 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 | 1108 - 1227 MPa | |
Compressive yield strength, 0.1% | 23.0 °C | 343 - 421 MPa | |
Elastic modulus | 23.0 °C | 110 GPa | |
Elongation A5 | 23.0 °C | 1 % | |
Hardness, HBW | 23.0 °C | 286 [-] | HBW 10/3000 |
Hardness, Rockwell C | 23.0 °C | 29 [-] | |
Izod impact energy | 23.0 °C | 2.7 J | |
Proportional limit in compression | 23.0 °C | 200 MPa | |
Reduction of area | 23.0 °C | 0.5 % | |
Shear strength | 23.0 °C | 413 MPa | |
Tensile strength | 23.0 °C | 724 - 758 MPa | |
Yield strength Rp0.5 | 23.0 °C | 400 - 420 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 | 46 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. | |
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