Al Mar RS-30 Steel?

[dragonxking]

I'm looking at a couple vintage al mar knives that use RS-30 steel. I couldn't find much information on this steel except that it's similar to 440A. Al mar mainly uses AUS-8 today and I was wondering how RS-30 compares to AUS-8.
Thanks! :thumbup:

 

[Gator97]

The only RS-30 steel I have found before was mentioned in Wayne Goddard's book "Wonder Of Knifemaking", and that one is closer to 440C, than 440A or AUS8A.
Here - RS-30 vs. 440A vs AUS8A composition comparison.

P.S. If anyone has information who made RS-30 steel in the past I'd appreciate your help

 

[dragonxking]

thanks for the reply Gator97,
I've just started getting into knives and am particularly interested in artisanal japanese folders and steel composition.
i've much to learn!

 

[kwackster]

RS-30 is/was made by Masahiro in Japan.
The steel is better known as Masahiro RS-30 or MRS-30.

 

[Gator97]

Thanks a lot for the info kwackster
I did have both steels in the chart... Never knew MRS was Masahiro. I'll combine records and add correct maker.

 

[vanadium]

Al Mar Knives used to include a little card which discussed RS 30. It stated that the steel could be hardened to RC 64, but they chose RC 57-59 for ease of sharpening. It also stated that the steel was exclusive to Masahiro Cutlery Co. and Al Mar.

 

[Sal Glesser]

MRS-30 (RS-30) made by Daido has .1% more carbon than MBS-26 (1.15%) Daido makes a number of steels exclusively for Masahiro.

sal