The general tolerances for linear and angular dimensions, as well as the general geometrical tolerances, according to Din 7168.
The specific tolerances for certain types of drop forgings, such as eye hooks, sheaves, scraper bars, tank wagon domes, and clamp nuts, according to the relevant Din standards.
The examples for the application of the tolerances and permissible variations for different shapes and sizes of drop forgings, according to Din 7526 Beiblatt.
The Din 7526 standard was first published in 1969 and was superseded by Din EN 10243-2 in 2000. The latter is a European standard that harmonizes the tolerances and permissible variations for steel die forgings. Die forging is a similar process to drop forging, but uses a closed die to shape the metal piece. Die forging can produce more complex shapes and finer details than drop forging.
Din 7526 is still relevant for some applications that require steel drop forgings with specific properties and dimensions. For example, Din 7526 is referenced by ISO 7526, which specifies an infrared absorption method for the determination of sulfur content in ferronickels. Ferronickels are alloys of iron and nickel that are used in stainless steel production. ISO 7526 requires that the test samples be prepared by drop forging according to Din 7526.
Din 7526 is one of the many standards that regulate the quality and performance of steel forgings. Steel forgings are widely used in various industries, such as automotive, aerospace, construction, mining, and energy. Steel forgings offer advantages such as high strength-to-weight ratio, resistance to fatigue and corrosion, and improved reliability.
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