Allegheny technologies incorporated [ati] is one of the world`s largest and most diversified producers of specialty metals. Ati produces a wide variety of stainless steel alloys known for their excellent corrosion and heat resistance. Austenitic stainless steels are the most commonly used materials produced by ati allegheny ludlum. Salient features are:
This class of stainless steel includes both the 200 and 300 series alloys, which are hardenable by cold working.
The 300 series alloys contain chromium and nickel as their major alloying additions.
Type 304 [also known as 18-8] is the most widely used of all stainless steel alloys.
The 200 series alloys possess mechanical and corrosion resisting properties similar to 300 series materials.
They also reveals high hardness and yield strength as well as excellent ductility and are usually non-magnetic. The 200 series alloys were originally developed to conserve nickel by replacing it with manganese at a ratio of 2% manganese for each 1% of nickel replaced. This reduced nickel content results in the 200 series alloys having a lower and more stable cost than the 300 series materials.
