What’s up guys?!?!?! It’s Michael with Michael Talks Metal back for video 99!!!! 1 more to 100!!!! Let’s GO!!!!!! Our  topic for today is 8620. Like all 86xx series alloys, Nickel, Chromium and Molybdenum are key to its performance. With a nominal carbon content of only point 20 %, it can be welded using proper procedure and can be heat treated to a hardness up to 30 Rc in sections 1/2 inch or less. It is often used in applications where parts are carburized to achieve a high hardness wear resistant surface while maintaining toughness in the core.

It is available in all common product forms.

8620 Chemistry

Chemical Composition8620
ElementMin %Max %
* For AMS 6276 & AMS 6277

Small variations in these chemistry requirements exist in some specifications.

Typical End Quench Hardenability (EQH):

48 Rc maximum @ 1/16″
32 Rc minimum @ 3/16″

Typical Heat Treatment Temperatures:

Normalize   1650 – 1750  deg F

Austenitize   1700 deg F

We have a few specs today so here goes with the more common specifications for 8620……

SpecificationProduct FormQualityMeltCondition
AMS 6274Bars, Forgings, Tubing2301VDSee Spec- Various
AMS 6276Bars Forgings, Tubing2300CEVMSee Spec- Various
AMS 6277Bars, Forgings, Tubing2300CEMSee Spec- Various

As always, details in specifications and part requirements can alter what we have shown you here today. This is time 99, I can’t possibly forget to tell YOU toooooo –  Check the Specs…  Twice. This is Michael with Michael Talks Metal, thanks for tuning in, Michlin Metals is a distributor and supplier of 8620 alloy steel. For more info visit our website  www.michlinmetals.com, if you’re still here and haven’t subscribed please consider doing so now, missed last weeks video? Click here. Thanks for watching, this is Michael with Michael Talks Metal, I will see you next Thursday, 10am, for video 100! Let’s go! I’m OUT!