ATI produces a wide variety of stainless and specialty steels known for their excellent corrosion and heat resistance. They are used in a broad range of applications: including aerospace and defense, chemical processing industry, oil and gas, electrical energy, medical, automotive, food equipment and appliance, construction, mining, transportation and electronics.
Most of ATI’s stainless and specialty steels are offered flat-rolled product forms:
Many are also offered in long product forms:
- Shapes & Rectangles
- Rod & Wire
Grades & Alloys
Ferritic (chromium) grades are low-nickel alloys that are resistant to corrosion, particularly stress-corrosion cracking (SCC) in chloride-containing environments. Austenitic (chromium-nickel) grades have improved formability and increased corrosion resistance and toughness. Duplex grades are alloys that are partially ferritic and partially austenitic, giving them a combination of properties, including SCC resistance, which is often superior to that of single-phase alloys. Martensitic and Precipitation Hardened alloys are typically used in applications requiring a combination of corrosion resistance and very high strength.
ATI produces specialty steel forgings for the aerospace and industrial markets.
Lean Duplex, Duplex & Superduplex Stainless
ATI has developed one of the world’s most comprehensive families of duplex alloys. Duplex alloys provide cost savings and can provide enhanced performance when compared to conventional stainless steels.
ATI 2205™ alloy is the most commonly used duplex grade and offers higher alloy content than lean duplex grades with improved corrosion resistance. Lean duplex grades, such as ATI 2003® ATI 2102® and ATI 2304™ alloys, offer lower nickel and molybdenum content and are alternatives to Types 304 and 316L stainless steels. Superduplex grades, such as ATI 255™ and Zeron® 100*, offer higher alloy content than standard duplex resulting in corrosion resistance similar to 6% molybdenum alloys.
*Zeron® is a registered trademark of Rolled Alloys Ltd.
Precipitation Hardenable (PH) Stainless
The precipitation-hardening grades develop very high strength in response to heat treatment while maintaining corrosion resistance similar to other stainless and specialty alloys. They are generally supplied in the solution-annealed condition from which they can be readily fabricated prior to precipitation-hardening heat treatment by the fabricator or end user.
PH grades are used in many applications where high strength is important, especially for aerospace components including airframes, hinges, cockpit doors and landing gear. Other uses are for heat shields, hydraulic systems, fire suppression and air conditioning systems..