Dear Members, please suggest suitable heat treatment of stainless steel 420 grade we have been quenching and tempering it to achieve UTS in excess of 1300 Mom and need % elongation of 8... Results are never stable wrt to elongation while we consistently achieve its required hardness. Thanks in advance
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Heat Treatment of SS 420 2
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EdStainless
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Have you tried different austenitizing temps?
Are you sure that you are getting a complete quench?
What is your temper temperature?
Very small changes in C can change HT response a lot.
Typically for 0.35% C I would start with a 1850F aust, it should quench to 53-56 HRC.
Then temper for 2hr at 900F as a starting point.
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P.E. Metallurgy, Plymouth Tube
Are you sure that you are getting a complete quench?
What is your temper temperature?
Very small changes in C can change HT response a lot.
Typically for 0.35% C I would start with a 1850F aust, it should quench to 53-56 HRC.
Then temper for 2hr at 900F as a starting point.
= = = = = = = = = = = = = = = = = = = =
P.E. Metallurgy, Plymouth Tube
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