AMPCO® M4 Forged Rounds: Superior Performance, Lower Cost, Beryllium-Free
The patented process gives AMPCO® M4 mechanical properties beyond the range of commercial nickel-aluminium bronzes, comparable to beryllium copper at a lower cost and without the beryllium copper industrial hygiene requirements.
Properties
General
| Property | Temperature | Value |
|---|---|---|
Density | 23.0 °C | 7.45 g/cm³ |
Recycled Content | 80 % |
Mechanical
| Property | Temperature | Value | Comment |
|---|---|---|---|
Charpy impact energy | 23.0 °C | 7 J | |
Compressive strength | 23.0 °C | 1324 MPa | |
Compressive yield strength, 0.1% | 23.0 °C | 689 MPa | |
Elastic modulus | 23.0 °C | 124 GPa | |
Elongation A5 | 23.0 °C | 5 % | |
Fatigue strength | 23.0 °C | 352 MPa | 100.000.000 cycles |
Hardness, HBW | 23.0 °C | 260 [-] | HBW 10/3000 |
Hardness, Rockwell C | 23.0 °C | 26 [-] | |
Reduction of area | 23.0 °C | 12 % | |
Shear strength | 23.0 °C | 538 MPa | |
Tensile strength | 23.0 °C | 800 MPa | |
Yield strength Rp0.2 | 23.0 °C | 500 MPa |
Thermal
| Property | Temperature | Value |
|---|---|---|
Coefficient of thermal expansion | 23.0 °C | 1.6E-5 1/K |
Specific heat capacity | 23.0 °C | 450 J/(kg·K) |
Thermal conductivity | 23.0 °C | 42 W/(m·K) |
Electrical
| Property | Temperature | Value |
|---|---|---|
Electrical conductivity | 23.0 °C | 4.80E+6 S/m |
Specific Electrical conductivity | 8.2 % IACS |
Chemical properties
| Property | Value |
|---|---|
Copper | Balance |
Technological properties
| Property | ||
|---|---|---|
| Application areas | AMPCO® M4 was initially developed as an aircraft specification alloy for gears in retractable landing assemblies, engine spacer bearings and other similar applications. It is rapidly growing in use where higher mechanical properties at elevated temperatures together with corrosion-resistant properties are required. Typical applications include aircraft landing gear bearings and bushings, bending dies (shoes and mandrels) for the tube bending industry, gear wheels and wear/guide plates... | |
Metal
- AMPCO® 26 Forgings – Premium Hard-Grade Aluminium Bronze for Exceptional Performance
- AMPCO® 25 Forgings: High-Performance Alloy for Superior Die Materials
- AMPCO® 22 Forgings – Duplex Alloy with Exceptional Hardness, Compression & Wear Resistance
- AMPCO® 21 Continuous Cast: High-Wear Resistance Alloy
- AMPCO® 21 Forgings – Premium Wear-Resistant Aluminum‑Iron Alloy
- AMPCO® 21 Centrifugal Castings – Premium Wear-Resistant Alloy
- AMPCO® M4 Forged Plates – Premium Nickel‑Aluminium Bronze with Beryllium‑Copper‑Level Strength at Lower Cost
- AMPCO® 21: High‑Performance Extruded & Drawn Rounds & Bars
- AMPCO® 18: Premium Extruded & Drawn Rounds & Rectangular Bars
- AMPCO® M4 Extrusions: High‑Performance, Cost‑Effective, 80% Recycled Metal