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Posted by Dave Royal [76.182.149.93] on Friday, January 15, 2010 at 21:54:42 :
In Reply to: Re: Strange posted by Will (in IL) [98.215.26.138] on Friday, January 15, 2010 at 19:49:47 :
Dennis&Will, you are 100% incorrect in your assumtions about steel. the alloys in steel are controlled to 1/100 of a percent or closer depending on the grade of steel. what you describe could be from any number of reasons not having anything to do with the chemical comisition of the steel! if a piece of plate comes thru the rolling mill and then is laid on the ground it will give two different anneal rates(cool ground) making one side harder than the other. by the time a heat of steel gets to the point that it's ready to pour(2850to3100 f) theres not any "chunks" floating around in it, beleive me, on this one I'm sure! if at some point during the roll process too much water is poured on the sheet or plate it could change things also, (water is used to control mill scale while the steel is hot) I worked 17 years in the melt shop of a mini-mill. the small mills make the best steel hands down. some rumors need to be laid to rest and not repeated, this is one of them. there are hundreds of different types of steel with thousands of different apps, with almost as many annealing procedures. by the way, when you find a piece of steel that looks like it's got a "chunk" in it , it's called a cold lap, it gets in the surface of the bar or plate from bad ROLL practices. trying to roll the steel after the temp is to cold (bright red) south american steels are bad about this. cold laps make for some bad welds also. well, I don't mean to tick anyone off, but I couldn't let this one pass. just information, Dave. chunks??