Case Hardening Question

The part must only be 57-59Rc to a depth of .6 inch, or whatever the units are. In others words, the inside of the part can be softer, as in 30 Rc. It gives the part more abrasion resistance. P20 is a common steel used to make injection molds.

What do you think it means?

Well. I guess I'm more inquisitive on the process of making a part with these properties.

You heat treat it.

After going back and looking at your history, it seems that you are asking questions of an elementary nature.

Perhaps if you explained what your business is and what your level of experience is it might be easier to help you.

Heat treating - Wikipedia, the free encyclopedia

Thank you. After I posted I Wikipedia'd it. It was on a drawing I'm trying to get fabricated and the vendors are asking questions about it.

If it's a mold, as I suspect, any competent tool maker should be aware of the process.

If your vendors are asking questions, be suspicious.

This mean case hardening process must to be followed to hardened the component and hardness of HRC 57 TO 59 must be maintained up to the minimum depth of 0.6 and maximum depth of 0.8

HRC stands for Hardness on Rockwelll C scale,

"HRC stsnds for Hardness on Rackwelll C sacle,"

Isn't that Rockwell C scale??

What is the part ?

The depth of 0.6 +0.2 is important if the unit is "inch". It would be good to check if it is not "mm".

Case hardening is a diffusion process and takes a long time being thus expensive. It is used under 2 circumstances either the surface supports a high local load (as the tooth flank of a gear where it has to resist to the high contact stresses) or it works in an abrasive environment and has to have a high hardness to limit wear in time (chain axis and bushing).

Since the hardened layer is brittle it has to be limited if the part is loaded in bending. In general it has a thickness proportional (with some limits) to the nominal part thickness.

This part is very likely an injection mold and the hardening is for abrasion resistance.

This is common when molding glass filled materials to reduce surface erosion.

I'm not sure what the OP is really trying to do, and have asked him for some background.

Than you. I am not so familiar with steel qualities in the US. If it is a mold may I doubt that the thickness is in inches. If the mold is worn more than 0.6 mm then most probably it has to be either repaired or scraped. What I do not know is the nominal dimension of the part.

I'd agree with the mm - and that's quite a bit. (I.e. 24 - 32 thou)

But I guess it could be 6 inch armor plate laminates.