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I have a plunger - that I'm using for glass forming - made out of a martensitic steel. Glass is at 1000°C and since martensite is a metastable phase, should I expect the properties of my plunger to change during its life?

If that's the case how can I calculate how fast it is transforming?

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  • $\begingroup$ It depends on the temperature and time the metal is heated , and its original heat-treatment and its chemical composition. $\endgroup$ – blacksmith37 Jul 19 '19 at 14:38

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