Whether in cooling systems, in space or other low temperature applications. Metal springs often have to withstand temperatures of up to – 200 degrees. Despite rising tensile strenght low temperatures have an unfavorable effect on the material, as the toughness decreases and brittle fractures can occur. For low-temperature applications, stainless spring steels, copper and nickel alloys are preferable to the patented spring wires and valve spring wires. The following table shows the limit temperatures.
table : Recommendations for use at low temperatures
|Spring material||Lowest working temperature in ° C|
|Patented drawn spring steel wire according to EN 10270-1||-60|
|Oil tempered valve spring wire according to EN 10270-2||-60|
|X10CrNi 18.8 (1.4310)||-200|
|X7CrNiAl 17.7 (1.4568)||-200|
|X5CrNiMo 17-12-2 (1.4401)||-200|
When working at low temperatures, surface defects caused by machining (e.g. grooves) or bends with small bending radii must be avoided.
Properties of spring materials