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New Carpenter Alloy Combines Ultra High Strength with Toughness and Ductility
03/12/2009 - Carpenter Technology introduces Carpenter AerMet 340 alloy, the latest new alloy in the company’s AerMet series of ultra-high strength and ultra-high toughness alloys.
Carpenter Technology Corp. has introduced the latest new alloy in AerMet series of ultra-high strength and ultra-high toughness alloys.
The new alloy—Carpenter AerMet® 340 alloy—is a precipitation hardenable (PH) martensitic grade that is heat treated and typically aged at about 900°F (482°C) to develop the desired properties. It offers the superior strength and toughness typical of Marage 350 combined with substantially improved ductility and fatigue resistance. Typical properties have included hardness of 56.5 HRC; ultimate tensile strength of 345 ksi (2369 MPa); fracture toughness of 34 ksi√inch (37 MPa√M); and 0.2% yield strength of 300 ksi (2068 MPa).
The new alloy has demonstrated ductility levels that are superior to alloys of similar strength in terms of an elongation of 11% and reduction in area (RA) of 53%. It has also demonstrated fatigue strength of 140 ksi (965 MPa) at runout in rotating bending fatigue stress tests.
The company said its new AerMet alloy can be considered for a variety of automotive, racing, aerospace and defense applications such as tubing, structural parts and components, drive shafts, springs, connecting rods and crank shafts. It is available from Carpenter in bar, hollow bar, sheet, wire, billet, plate and strip.
Based in Wyomissing, Pa., Carpenter Technology is a leading manufacturer and distributor of specialty metals including stainless steels and titanium, and various engineered products.
