Steel Names and Numbers

[Nimravus]

Ok I am familiar with the ANSI code for steel and all the Tool steel charts I know the stainless as well but can someone clear this up.

According to Spyderco's chart

CPM-S30V = ????
CPM-S60V = CPM(T)-440V
CPM-S90V = CPM 420-V

All these damb names and numbers for similar steel or the same stupid thing. Why have all these names for the same thing.

Do we really need to have Ford, Linclon, Mercury in steel can we not just have the same steel. Steel is steel if it is called CPM-S60V or CPM(T)-440V if the composition is the same then what is so different about it then???

 

[Esav Benyamin]

As I understand it, the 420V and 440V designations were the originals, but they were also confusable with 440A, 440B, and 440C to which they aren't related. When the S30V designation came up for a new steel, the older two were given new names in line with it. 420V and 440V are retired designations.

 

[mete]

Steels are listed by various standards; AISI, ASTM, SAE etc. The most common is AISI which include carbon steels ( 1050,1084,1095) alloy steels (5160,52100,4140 ) and tool steels (W1,O1, L6,A2). Steel companies have proprietary steels such as Crucible Particle Metallurgy (CPM S30V etc). They have changed some of the names , check www.crucibleservice.com .