LMSA Alloy 718
Lamineries MATTHEY SA produces Alloy 718 in precision cold-rolled product forms (strip and sheet). Alloy 718 (UNS N07718/W.Nr. 2.4668) is an age hardenable Ni-Fe-Cr-Nb-Mo-Ti-Al alloy designed to combine excellent strength with good fabrication characteristics in the annealed condition. Alloy 718 is covered by the following specifications: AMS 5596/5597 (sheet, strip and plate) and NACE MR-01-75 (oil field equipment). While limited to applications below 650°C (1200°F), it is significantly stronger at these lower temperatures than materials such as the Alloy X750. It is also much easier to weld and is less susceptible to the strain age cracking problems (occurs during the post-weld heat treatment of restrained welds in certain alloys) common for gamma prime strengthened materials.
Typical uses
The ease and economy with which Alloy 718 can be fabricated, combined with good tensile, fatigue, creep, and rupture strength, have resulted in its use in a wide range of applications. The use of Alloy 718 is suitable in both aircraft turbine engines and land-based turbines. Other applications include rings, casings, components for liquid fueled rockets, cryogenic tankage, fasteners and instrumentation parts, pressure membranes and many types of formed sheet metal components.
一般属性
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Technical Datasheet (English)
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