The vacuum with the coating of refractory material further permits the use of high-resistance (750 MPa) microbonded steel in the manufacture of the ...
www.freepatentsonline.com/20050161038.html

Tool steel refers to a variety of carbon and alloy steels that are particularly well-suited to be made into tools. Their suitability comes from their ...
en.wikipedia.org/wiki/Tool_steel

Tool Steel Specification and Information - Engineers Edge
This is an electric furnace melt oil hardening tool steel. A non-shrinking general purpose tool steel, it has excellent abrasion resistance, toughness and ...
www.engineersedge.com/tool_steel.htm

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Note added at 8 mins (2007-06-10 17:27:44 GMT)
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... which may be manufactured of microbonded carbon steel and coated with special materials (refractory metals, superalloys, stainless materials, plastics, ...
www.wipo.org/pctdb/en/wo.jsp?WO=2000/78446