The supply condition specified in the material data sheet for stainless steel pipes is \"solution-treated\"; how can one determine whether it was produced by hot extrusion or cold drawing? This is because the dimensional tolerances vary depending on the processing method used. I don’t know which criterion to use for testing
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The supply condition specified in the material data sheet for stainless steel pipes is \"solution-treated\"; how can one determine whether it was produced by hot extrusion or cold drawing? This is because the dimensional tolerances vary depending on the processing method used. I don’t know which criterion to use for testing
This post was last edited by wanlirn on 2020-4-10 at 13:38. For sizes of 2–8 mm, the final product is usually made from cold-drawn tubes; those with a wall thickness of less than 2.0 mm are produced using the cold-rolling process. For thick-walled tubes with a wall thickness of over 8 mm, hot rolling should be specified in the contract; of course, it should also be indicated in the certificate. However, the heat exchange tubes and connections used in containers are generally cold-drawn tubes
Is it possible to do this by measuring the wall thickness?
Whatever is written on the quality certificate – as long as there’s a stamp, then there’s no problem. Wealthy organizations with the necessary resources can take a look at the crystal image
I would like to ask, what are the differences in metallography between cold-drawn tubes and hot-rolled tubes?