45% Nickel-Iron Alloy
Radiometal 4550 has a nominal 45% nickel content and combines excellent permeability with high saturation flux density.
The alloy is used to great advantage in sensitive relays which need to respond to very weak currents. It is also widely employed in transformers, chokes and special motors where the properties of silicon-iron do not provide the required magnetic performance. Material is supplied in the hot rolled condition. It should be noted that optimum magnetic properties in components are only achieved after heat treatment at 1,180°C in dry hydrogen – our laboratory can provide full details of the process.
The density of this nickel-iron alloy is 8,250 kg/m3.
Forming & Machining:
Nickel-iron alloys are austenitic in structure and are therefore readily formable by bending, stretching and deep drawing.
Machining is not difficult but it must be recognised that this type of material work hardens readily and care needs to be taken over the choice of tool geometry and material feeds, speeds and cutting fluids. We are able to provide recommendations.
- Toroidal cores and laminations
- Telecommunications transformers
- High performance motors
- Protection relays
- Servo valves and actuators
- Gas valves
- Missile systems
- Watch movements
We offer Radiometal 4550 nickel alloy in black, peeled or precision ground hot rolled bar.
With power saws across the Group including a fully automated magazine feed CNC rod blanking line, we can cut your material to your size requirements.
Pick a Product
To find out more about Smiths Metal Centres own range of nickel alloys, click on one of our products on the side menu of this web page.