D2

[knarfeng]

I have seen this statement before, but authoritative evidence is that PH-D2 stands for Precipitation Hardened D2.

Huh?
Where have you seen this, Jeff?

D2 isn't a PH steel. D2 is a Martensitic stainless steel.

 

[stevomiller]

I have seen this statement before, but authoritative evidence is that PH-D2 stands for Precipitation Hardened D2.

There is no substance to this, as D2 isn't precipitation hardening. The mechanism of precipitation hardening does NOT work with this particular alloy.

 

[black mamba]

Sorry if this was bad info fellas. Steve Koontz, the former head of SMKW and an executive in the knife manufacturing business for over 20 years, was the source. As he has been closely involved with Queen Cutlery in many SFO knife projects, I believed him when he said many times on air that it stood for precipitation hardened D2. If D2 is in fact NOT a PH steel, then it is either a marketing ploy or Mr. Koontz was in error. I still find it hard to believe that it stands for Peters Heat Treatment.

Perhaps Waynorth, with his ties to GEC's Bill Howard (who ran Queen for many years), could find out the truth about the PH-D2 tang stamping.

 

[knifeswapper]

I have seen this statement before, but authoritative evidence is that PH-D2 stands for Precipitation Hardened D2.

Bill Howard said he originated the PH-D2 stamp to stand for Peter's, and other references may be relative - but incidental. So, I guess we have to go with the guy that had the stamp made

 

[black mamba]

Thanks, Mike, I'm eating crow for dinner tonight, but glad to know the truth.

I guess I need to be more careful about who I consider to be an authority!

 

[knifeswapper]

Thanks, Mike, I'm eating crow for dinner tonight, but glad to know the truth.

I guess I need to be more careful about who I consider to be an authority!

You had no reason not to believe him. Everyone gets caught repeating somebody else's "truths"

 

[Squashfan]

Correct me if I am wrong but isn't Peter's a well respected heat treater?

 

[knarfeng]

You are not wrong.
They are a large industrial heat treating establishment. They do parts for aerospace and the tool making industry. They also do cutlery.