SAE International has issued Aerospace Material Specification 6516 for Ferrium M54, an ultra-high-strength, high-toughness steel that is also highly resistant to stress corrosion cracking. The material covers the procurement of bars, forgings, and forging stock of M54 as a double-vacuum-melted (i.e., VIM/VAR) aircraft-quality alloy, and defines chemistry, thermal processing, properties and other material requirements. And hey, if it works in aerospace it could work for wind too.
QuesTek designed and developed M54 to be a lower-cost, drop-in replacement for AerMet 100 (AMS 6532) under projects sponsored by the U.S. Navy Naval Air Systems Command (NAVAIR). The S-basis procurement minimums for M54 are: 240 ksi yield strength; 285 ksi tensile strength; and 100 ksi-–in fracture toughness. M54 has also demonstrated superior resistance to SCC than competing steels such AerMet 100 and 300M. For economy, M54 contains about 50 percent less cobalt than AerMet 100.
Applications for M54 can include aircraft landing gear, aircraft arresting tailhooks and components, power transmission driveshafts, jet engine shafts and shrouds, drilling equipment, actuators, fasteners, blast tolerant containers, ordnance, sporting goods and other demanding products such as wind turbines.
QuesTek Innovations LLC www.questek.com
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