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Q - I have recently ran a welding procedure in Austenitic Stainless Steel 316 using a 316L consumable. What would be the best  -ºC Temperature that I could test the charpy V Notch impacts at?

A - Austenitic Stainless Steel 316 has great impact properties at low temperatures. Cryogenic service is -196 and the impacts should pass at that temperature. If the material is not needed to perform at this low temperature, then a more common temperature for testing is -50. Typical values that can be achieved are at -50 are 80J and at -196, 50J. The previous assumptions are made providing heat inputs and interpass temperatures are in line with the recommendations for the material/consumable. As with any testing that is to support a procedure, the end user/client should also be consulted prior to testing to ensure there are no specific application specifications that should be applied to the project.