Alloy Combines Strength and Toughness Properties

Carpenter Technology Corporation has developed a new ultra high-strength steel alloy that is a lower-cost alternative to many cobalt-containing precipitation hardenable alloys.

Carpenter Technology Corporation has developed a new ultra high-strength steel alloy that is a lower-cost alternative to many cobalt-containing precipitation hardenable alloys. Temper Tough alloy is an air-melted, cobalt-free quench and tempered alloy that has a combination of high strength and high toughness attributes that may allow designers and engineers to achieve an extended cycle life where components are under high loads with constant stress of intense, repetitive motion.
 
This alloy is a readily available, low cost alternative to cobalt-containing precipitation hardenable alloys for a variety of general purpose tooling, industrial and automotive applications, especially those in which designers may be seeking to lighten the weight and increase the longevity of their products, the company says.  
 
Temper Tough alloy is able to attain both a typical strength of 290 ksi ultimate tensile strength (UTS) and a typical range of toughness between 60 and 65 ksi√in. The alloy has also demonstrated superior fatigue resistance properties (axial-axial) of 120 ksi (827 MPa) compared with traditional quench-and-temper alloy steels averaging 79-85 ksi (545-586 MPa), the company says.
 
The attributes of this alloy make it a candidate for applications in high-demand crank cases, drivetrains, powertrains, structural members, suspensions, and industrial tooling, especially when designers are looking for affordable solutions to reduce the weight of parts and/or components without sacrificing performance.