Need tool steel grade research samples

Dear Sirs
I am Pragatheeswaran, doing research in Plasma nitriding. We have a small unit of plasma nitriding machine; I have worked on tool steel material blade (D2). I would like to do the more research in these materials, for that we are in needed other different grade tool steels materials. I kindly request you to inform me where I get these materials for my research ( like Sigma Aldrich)
Thanking you Sir

Yours truly,
A.Pragatheeswaran

A Pragatheeswaran
Student - Kottayam, Kerala, India
December 2, 2009

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