tool steels

Date 11-19-2001 22:35

Codes and standards that address welding are usually written for a specific end use. For example, ASME Section IX is primarily boilers, pressure vessels and piping, or AWS D1.1 is for structural steel welding. What is the end use of your tool steel? Is it just machine tools? If so, you would want to look at product standards for machine tools to see if they apply to the product you are making and see what they say about welding. It is possible that there is no code or standard applicable to the welds you want to make and you may need to use "good judgement" to determine what standards (if any) to apply for qualification.

Marty

By George-kh (**)

Date 11-21-2001 20:51

Dear Marty
Thanks for your reply.
however, I think it's grotesque that there is not a code for tool steels!!!

By RonG

Date 11-23-2001 16:23

Grotresque is welding on tool steel.

First off if you weld on a tool steel you undo every thing that makes it tool steel and you something less than you started with.

How often do you weld Tool steel in to an application that has potetial for a catostropic failure? Catostropic meaning loss of life or great amounts of money.

There must not be a need for a code.

By burikg

Date 11-23-2001 13:05

There is no any code about tool steel welding because there are so many problems with weldeability :
- check Ce equivalent of these kind of steels, it is extremly high, you must overheat them, so
the tool steels will lost their hardness
- however if you want to weld them you must weld first a protective layer, it must be very thin
(you should use pulsed GTAW, or micro plasma) to reduce the heat input.
than should use some kind of friction welding process.

Regards Geza, EWE, Hungary