As i understand it the best japanese planes use hitachi super blue steel laminated to wrought iron backers for the blades.
Hitachi laminated steel.
Hitachi metals pioneered the development and mass production of rare earth magnets under the neomax brand.
In 1937 so razors with hitachi and y s s.
Or yasuki symbols would be younger then 1937.
This steel has higher amounts of phosphorus and sulfur than the other steels i m about to mention.
Neomax magnets boast exceptionally superior magnetic properties.
Hitachi metals group plays an important role in responding to the automotive industry s demand for high performance and better fuel economy by supplying a wide array of highly functional products derived from proven advanced materials and backed by extensive r d.
Here is one site that at least lists the presumed alloy.
Japanese shiro 2 suminagashi steel.
Hitachi yasuki laminated white paper steel no2.
Aogami super blue steel is produced by hitachi metals for tools and knives.
Hitachi metals america s high quality special steels are mass produced from carefully selected materials utilizing state of the art equipment and technologies in melting refining hot working cold working and heat treatment.
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The steel division of hitachi ltd.
The latest equipment gives shape to traditional techniques.
It is extremely difficult to find anything but doubletalk and scuttlebutt on this steel.
Yasugi specialty steel is high grade specialty steel manufactured at hitachi metals yasugi works which carries on the tradition of japan s ancient iron.
Classified as exotic steel by cutlery standards it has a loyal.
Was thereby split off to form hitachi metals.
Here are the common ones found in knives sk steels sk5 sk4 sk3 the least expensive of the carbon steels and the lowest carbon content 5 has the least carbon 3 the most.
Hitachi yasuki white paper steel no2.
As far as i know and understand yasuki steel works merged with hitachi ltd.
Super blue is the highest grade blue steel and contains up to 1 1 2 carbon for wear resistance and chrome to elevate hardness and improve edge holding and corrosion resistance.
Specialty tool steel from hitachi metals america.