Nickel 200 Wire Magnetic Properties and Thermal Expansion

Nickel 200 wire is ferromagnetic at ordinary temperatures, and its dimensions change with temperature. Both magnetic response and thermal expansion depend on temperature and material condition. For a component design, use relevant data for the actual wire and verify the assembled part under its operating conditions.

Magnetic behavior

Magnetic permeability, coercivity and response are affected by temperature, processing, mechanical stress and the measuring method. Values reported for one specimen or condition should not be assumed for every wire. Temperature changes the magnetic behavior; determine the relevant behavior across the intended operating range instead of assuming a fixed cutoff or a guaranteed shielding result.

For a magnetic sensor, contact or other device, define the required magnetic property, field strength, temperature, wire condition and test method. Verify the finished assembly, including joints and any other magnetic materials.

Thermal expansion and dimensional change

The coefficient of linear thermal expansion relates a change in length to temperature change. An average coefficient is associated with a particular temperature interval; it should not be treated as a single constant for every range. For a simple uniform-temperature estimate, the change in length is approximately the initial length multiplied by the applicable average coefficient and the temperature change. Constraints, temperature gradients and assembly geometry require additional assessment.

When matching the wire to another material, compare data for both materials over the same temperature range and verify the joined component. Do not assume full reversibility or a fixed performance after a specified number of thermal cycles without representative testing.

Material specification and order

Nickel 200 is UNS N02200. ASTM B160 covers nickel rod and bar; it should not be presented as a wire specification. Identify the applicable wire product specification and edition for the order, together with diameter, tolerance, surface, delivery condition, quantity and required inspection documents.

For elevated-temperature service, consider the manufacturer’s Nickel 200 and 201 data and the atmosphere and duration. Nickel 201 is generally preferred above 315 °C in the cited manufacturer guidance; this is not a universal wire or component operating limit.

Frequently asked questions

Is Nickel 200 wire magnetic?

It is ferromagnetic at ordinary temperatures. The required magnetic properties should be measured under the intended conditions.

Is one expansion coefficient valid at all temperatures?

No. Use an applicable value for the temperature interval, condition and application.

Explore our nickel wire category or request a quotation with the grade, dimensions, condition, service and documentation requirements.