? for Mete

[Mark Williams]

Could you explain some of the trace elements in a batch of steel. Where did they come from are some of them worthless or undesireable ? Thank you sir.

al-.028 b-.0004 c-1.009 cb-.004 co-.010 cr-1.39 cu-.174 fe-96.303 mn-.441
mo-.059 ni-.179 p-.007 pb-.012 s-.025 se-.0000 si-.315 sn-.0072 ta-.000 ti-.003
v-.024 w-.009 zr-.0004

 

[mete]

Much of steel is recycled these days so elements can be occuring naturally or from from various plating , nonferrous contamination etc. Desirable elements in small amounts we call trace elements , undesirable elements we call tramp elements....boron .0004 ,this is just below what is used in boron steels [boron collects in the grain boundaries and greatly increases hardenability], aluminum and zirconium may very well be from the brick lining of the furnace ,will form oxides readily.Lead ,selenium and tin are undesirable.Columbium,cobalt, molybdenum, nickel,vanadium, tungsten, titanium are beneficial but not significant in those amounts.Carbon , silicon, chromium, manganese are the alloying elements. Sulphur is within normal ranges, copper not a propblem in those amounts but it seems that copper is becoming more common and more of a problem. [no phosphorous ?]

 

[Mark Williams]

I was sent the breakdown in an e-mail that was typed by the sender as he was reading the list. He may have left out the phosphorus. I'll check. Can you guess this mystery steel anyone?

Thank you very much Robert

 

[tmickley]

with 1% C, 10100???

 

[Russ Andrews]

The C & Cr look like 52100, but you don't usually see all that
other stuff in that steel.

Russ