GMW25th Edition, January 2008Complete DocumentLow Carbon Sheet Steel
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Description / Abstract:
GMW2, 5th Edition, January 2008 - Low Carbon Sheet Steel
This specification covers the requirements for low carbon continuous cast steel for exposed and unexposed applications and is applicable to all low carbon steel sheet products and coated substrates. Continuously hot or cold rolled flat products shall be supplied as coils or sheet. Hot rolled flat products are usually supplied in thicknesses > 1.75 mm. These flat products are used for cold forming and for manufacturing of welded tubes. Cold rolled flat products with the appropriate surface type and surface finish are suitable for the application of surface coatings (metallic plating by melt dipping or thermal spray painting, electrolytic plating, organic coating and/or other coatings). This specification does not apply to steel for case hardening or strip applications. Additional requirements or agreements shall be specified by regional GM Automotive Operations (GM) business units [e.g., North America (GMNA), Europe (GME), Latin America (GMLAAM), and Asia Pacific (GMAP)]. Material Description. The material designation is defined by the GMW base metal specification number, steel product type and steel grade. The steel product type is designated by CR for cold rolled products, or HR for hot rolled products. A numeral (1, 2, 3, etc.) will designate the steel grade formability level. The steel grade will correspond to the chemical and mechanical requirements as shown in Table 1, 2 and 3. A third suffix (C) may be added after the steel grade to designate a low carbon steelmaking practice. The finish type, an alpha character, will designate the finish as E (exposed), or U (unexposed). In addition, products which are not coated shall have the word uncoated added to the call-out after the steel type, but before the finish designation. The above descriptive items are used together to form the coding system. Examples of the coding system for engineering part drawings and manufacturing engineering documents are shown in paragraph 8. Typical Applications. Sheet metal parts consisting of low carbon steel products and coated low carbon steel substrates. Remarks. Not applicable.
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Document History:
GMW2
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10th Edition, July 2019
GMW2
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9th Edition, November 2017
GMW2
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8th Edition, October 2012
GMW2
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7th Edition, June 2012
GMW2
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5th Edition, January 2008
GMW2
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2004 Edition, April 2004
GMW2
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3rd Edition, August 2002
GMW2
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2nd Edition, October 2000
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