Beta C is the registered trademark name of Dynamet Inc, a subsidiary of Carpenter Technology Corp. The trademark is applied as the name of a titanium alloy.[1] It is a metastable beta alloy which was originally developed in the 1960s.
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Other designations for Beta C include:
Ti Beta-C is a Trademarked name of RTI and marketed / inventoried by Titanium Engineers Inc. (Stafford TX) and Titanium Engineers Ltd., (Birmingham, West Midlands, UK)
Common Alloy Name: Ti Beta-C
Nominal Composition: Ti-3Al-8V-6Cr-4Zr-4Mo
Type: Near-Beta and Beta Alloy
Alloy Description: A heat-treatable, deep section hardenable, very high strength Ti alloy possessing good toughness/strength properties, low elastic modulus and elevated resistance to stress and localized corrosion in high temperature sweet and sour brines.
Approved for use in sour ( H2S ) applications. Material is approved to be certified to meet NACE MR0175 and ISO 15156 with a maxmimum hardness of HRC 42.
Fabricated Products Available: Forged and Machined components - various
Mill Product Forms Available: Ingot, Bloom, Bar, Billet, Seamless Pipe, Wire
Typical Applications: Geothermal brine energy extraction, Landing gear components, Navy ship components, Hydrocarbon production/drilling, Power plant cooling system components
Beta C is relatively easy to melt and process during fabrication, when compared with other beta alloys. It is not recommended in high-wear applications due to its tendency to gall. Beta C has good corrosion resistance to both saline environments and acids, due to the properties of titanium and to its ability to spontaneously form a well adhered protective oxide layer when exposed to a high oxygen environment. Beta C is one of the least dense beta alloys, which combined with its ability to achieve high strengths through heat treatment provides a good strength to weight ratio.
The properties of Beta C have led to its use in a number of niche applications, including parts of aircraft landing gear and in fasteners used in the automotive industry.
Beta C is composed primarily of titanium, with relatively large (3-8.5% each) additions of molybdenum, aluminium, zirconium, chromium and vanadium, and smaller amounts (0.3 - 0.005% each) of iron, hydrogen, nitrogen, oxygen, yttrium, carbon, and other elements.[2]