I am using M2, brass nickel-plated spring washers. The surrounding environment is where the temperature changes from -160 ° C to 250 ° C, and when I removed the nut that was tightened to it, the gap on the spring washer disappeared. Under such an environment, will the above materials be distorted and lose their function? Also, are there any general spring washers that are resistant to the above temperatures?
If it is a plated product, the material is probably carbon steel, and in this case, the operating temperature should be about -50 to + 100°C. So, if it is used in a temperature range higher than that, it will deform. I think that SUS304 material is suitable if the spring washer is used in the temperature range of -160 °C to 250°C, but some fatigue may still occur depending on the usage environment (max 250°C for a long time, etc.).
I think that there are some products with a heat resistance of 300°C or higher in the world, but are such products custom-made? (Especially this time it is as small as M2)
We would recommend Inconel X750 material for heat resistance of 300°C or higher, but I think it is difficult to make a custom-made M2 size washer for your inquiry. (By the way, the minimum size of the disc springs that we can make with Inconel material is 0.5t thickness x outer diameter φ10, inner diameter φ5.2 or more.)
