Tool Steels Resistant to Acids 2

[Dek]

Has anyone any knowledge of tool steels with enhanced resitance to acids,or maybe stainless with non galling quality ??

 

[Metalguy]

Nitronic 60 is one galling-resistant stainless, with about the same corr. res. as 304. There are others available.

Don't know about the first part of your question.

 

[TVP]

The answer depends greatly on what specific acids are used, and what type of tooling is needed, e.g., hot-work, cold-work, plastic injection molding, etc. For the best resistance to acids, you should probably be looking at nickel-based alloys over tool steels, even if they are stainless alloys. Carpenter has several alloys that I would recommend investigating, including Pyrotool Alloy 7 and Pyrotool Alloy W. You can obtain more information using the following link:

http://www.cartech.com

click on Technical Information then Alloy Category then Tool and Die Steels then scroll to page 2 for the Pyrotool alloys. There are many other grades that may be suitable, again, depending on the final application, acid type and concentration, etc.