Originally Posted by crazylane

When you look at a grade of steel it is not always the case of what temp it was heated at. If you see a number for aluminum that is a 500 series or maybe even a 600 series, that is when you know it has been tempered, as far as steel, when you see a four didgit number that is usually the makeup of at least two elaments, ie Iron and Stainless. and it usually is made up of more than just two. Kinda like a 70 to 25 percent leaving 5% of none purity metal in it. Now if you see a three didget number like 300 series stainless, or 400 series stainless than that is when that curtian type of steel was rolled at a curtian Temp, to make it either a stonger or more machinable metal.

I am sorry for my spelling cause I am not a Lit expert, just a machinist. And I am not on here to take sides, just looking at it from a different point of view.

Originally Posted by david vericker

I generally agree with what your saying and understand your point of view. However, none purity (porosity,segragation,or inclusions) within a billet of steel would led to part failure during manufacturing or while in service.

I think thats enough on this subject - lets get on with some drag racing - it's that time of year again!