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ASM International > AMS 5613
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Yugang Liu [Search]
10/22/07 01:09 PM
AMS 5613
Hi. I trid to heat treat the material in 0.5" tube to reach the hardness of Rc 32 with temper at 1125F-1175F for 1 hr (after 1750F/15min and air quench anneal). However, tried several times, the hardness cannot reach to Rc32. Anyone have idea what is the problem? Thanks, Charles

Lee Gearhart [Search]
10/23/07 12:47 PM
AMS 5613
What was your hardness after quenching, before tempering? Can you reduce the tempering tempering temperature?

Yugang Liu [Search]
11/07/07 01:34 PM
AMS 5613
Thanks, Lee, for the reply. I was out for some of time. The hardness we have is about 28-30Rc. The process given by OEM said the tempearture range is 1125-1175F. Charles

Toby Padfield [Search]
10/24/07 11:53 AM
AMS 5613
SAE AMS 5613 is a standard for Type 410 stainless steel. Tempering of this steel is complicated by the microstructural aspects that subsequently affect fracture toughness and corrosion resistance. What this means is that this grade can be tempered in the range of 1050-1125 F in order to achieve a hardness of ~ 25-31 HRC or tempered in the range of 400-700 F and achieve a hardness of ~ 38-47 HRC. Tempering in the range of 700-1050 F is not recommended due to the resulting poor fracture toughness and corrosion resistance.

Yugang Liu [Search]
11/07/07 01:36 PM
AMS 5613
Thanks for your help. We need the hardness of Rc33. So you mean that the temperature range of 1125-1175F shall not be possible to give the RC33? Charles

Toby Padfield [Search]
11/08/07 10:39 AM
AMS 5613
That is correct. HRC 33 is not possible with this grade when tempering in the range of 1125-1175 F.

Yugang Liu [Search]
11/14/07 11:17 AM
AMS 5613
Thanks again for your help. Our test confirms this as well. Now,we get more familiar with this material. Charles Liu

Aaron Broumas [Search]
11/12/07 01:42 PM
AMS 5613
Hello. It is common to perform stress relief HTing at 1015 F +or- 25 F. Would there be a significant debit on fracture toughness or corrosion resistance at this temperature? The 410 parts requiring stress relief are usually thin enough so that only 2 hrs at 1015 F is all that is required.