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Hard chrome plating. Hard chrome, also known as industrial chrome or engineered chrome, is used to reduce friction, improve durability through abrasion tolerance and wear resistance in general, minimize galling or seizing of parts, expand chemical inertness to include a broader set of conditions (such as oxidation resistance), and bulking ...
The Semmerling series of pistols included the LM1, LM2 (.380 ACP semi-automatic variant), LM3 and the XLM (.45 ACP semi-automatic variant) and LM4. [2] The only version available to the public was the LM4, which was first designed and manufactured in the US in the early 1980s and marketed at a price of US$645.
New guns are typically available in blued finish options offered as the least-expensive finish, and this finish is also the least effective at providing rust resistance, relative to other finishes such as Parkerizing or hard chrome plating or nitriding processes like Tenifer.
SRG Global's Advanced Development Center opened in May 2010 in Taylor, a suburb of Detroit. The 46,000-square-foot (4,300 m 2) facility houses a chrome plating line and four injection molding presses ranging from 165 to 2,200 tons to create parts for coating and testing in the center’s on-site laboratories. The Advanced Development Center is ...
41xx steel is a family of SAE steel grades, as specified by the Society of Automotive Engineers (SAE). Alloying elements include chromium and molybdenum, and as a result these materials are often informally referred to as chromoly steel (common variant stylings include chrome-moly, cro-moly, CrMo, CRMO, CR-MOLY, and similar).
Black nickel plating was developed around 1905, and between the two wars, black chrome plating (first German patent 1929.GP 607, 420), which saw wider use only from the mid-1950s. [14] After the First World War, the first procedures for anodic oxidation and coloring of anodically oxidized aluminium were developed (1923, 1924.DRP. 413876).
In place of the earlier chrome plating, blued finish was used on the bolt, trigger, and cocking piece starting in October 1944. The firing pin design was changed in January 1946. Sources: Houze 1993, p. 160 & Henshaw 1993, pp. 104–105. Approximately 383,597 [2] to 652,538 [3] Model 67s had been produced when production ceased in 1963. [8]
A #7 finish is produced by polishing with a 280–320 grit belt or wheel and sisal buffing with a cut and color compound. This is a semi-bright finish that will still have some polishing lines but they will be very dull. Carbon steel and iron are commonly polished to a #7 finish before chrome plating.