Does Annealing Change Yield Stress in Steel

Materials Engineering general discussion Metal & Metallurgy
#1

QUESTION
Does the process of annealing (at 950 deg c) or stress relieving (at 650 deg c) alter the yield stress of BS EN 10210 1993 S355 or s275 steel?

REPLIES

Maui
In general, the purpose of annealing is to soften the material so that it can be processed further. Annealing dramatically reduces the residual internal stresses that develop from hot working operations such as forging, rolling, stamping, etc. Because the material can be softened considerably by using an appropriate annealing cycle, both its tensile strength and yield strength are typically reduced.

The amount that it is reduced by depends upon:

  • The material in question
  • The prior mechanical and thermal history
  • The annealing cycle used.

SOURCE
https://www.eng-tips.com/viewthread.cfm?qid=68417
Above is a snippet.

#2

And, thank you to @Maui for not simply answering the question, but educating this young engineer about the topic.