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现行 ASTM A879/A879M-22
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Standard Specification for Steel Sheet, Zinc Coated by the Electrolytic Process for Applications Requiring Designation of the Coating Mass on Each Surface 需要在每个表面上指定涂层质量的应用用电解法镀锌钢板的标准规范
发布日期: 2022-04-01
1.1 本规范涵盖了通过电解工艺应用于热轧和冷轧钢板的锌涂层。涂层表面光滑、无毛刺。本规范中涵盖的镀锌板以广泛的涂层质量生产,以提供与所需预期使用寿命兼容的涂层。涂层质量各不相同,从通常涂漆以提供良好服务的非常薄的涂层到在裸露(未涂漆)条件下提供良好耐腐蚀性的相对较重的涂层。 1.2 产品应涂覆在一个或两个表面上,两个表面上的涂层质量相等或不同。 在每个表面上涂有相同涂层质量的板材在每个表面上具有相似的防腐等级。然而,通常情况下,一个表面需要比另一个表面更高级别的防腐。因此,规定一个表面的涂层质量比另一个重。与未涂漆表面相比,指定涂漆的任何表面都将提供额外的防腐保护。 1.3 这种涂层工艺基本上不会影响母材的机械性能,允许在任何级别的热轧或冷轧钢板上使用。涂层钢板可作为商品钢(CS)、拉拔钢(DS)、深冲钢(DDS)和其他钢材提供- 深冲钢(EDDS)、结构钢(SS)、高强度低合金钢(HSLAS)、高强度低合金钢(HSLAS-F)、固溶硬化钢(SHS)、烘烤硬化钢(BHS)、所需硬度钢(RHS)或特殊成型钢(SFS);见规范 A1008/A1008M 和 A1011/A1011M . 1.4 订购尺寸是根据成品涂层钢板产品规定的,所有尺寸公差都是根据规范定义的 A568/A568M ,第8节。 1.5 单位- 以国际单位制或英寸-磅单位表示的数值应单独视为标准值。 每个系统中规定的值不一定是精确的等价物;因此,为确保符合本标准,每个系统应独立使用,且两个系统的值不得组合。 1.6 本标准并非旨在解决与其使用相关的所有安全问题(如有)。本标准的用户有责任在使用前制定适当的安全、健康和环境实践,并确定监管限制的适用性。 1.7 本国际标准是根据世界贸易组织技术性贸易壁垒(TBT)委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。
1.1 This specification covers zinc coatings applied by the electrolytic process to hot-rolled and cold-rolled steel sheet. The coating has a smooth, spangle-free surface. The zinc-coated sheet covered in this specification is produced in a wide range of coating masses to provide coatings that are compatible with the anticipated service life required. The coating mass varies, from very thin coatings that are usually painted to provide good service, to relatively heavy masses that provide good corrosion resistance in the bare (unpainted) condition. 1.2 The product shall be coated on one or both surfaces with equal or differential coating masses on the two surfaces. Sheet coated with equal coating masses on each surface has similar levels of corrosion protection on each surface. Often, however, a higher level of corrosion protection is required on one surface than is required on the other. Thus, one surface is specified to have a heavier coating mass than the other. Either surface, when specified to be painted, will provide additional corrosion protection as compared to an unpainted surface. 1.3 This coating process has essentially no effect on the base metal mechanical properties and use is permitted on any grade of hot- or cold-rolled steel sheet. The coated sheet is available as Commercial Steel (CS), Drawing Steel (DS), Deep Drawing Steel (DDS), Extra-Deep Drawing Steel (EDDS), Structural Steel (SS), High-Strength Low-Alloy Steel (HSLAS), High-Strength Low-Alloy Steel with Improved Formability (HSLAS-F), Solution-Hardened Steel (SHS), Bake-Hardenable Steel (BHS), Required Hardness Steel (RHS), or Special Forming Steel (SFS); see Specifications A1008/A1008M and A1011/A1011M . 1.4 Ordered dimensions are specified based on the finished coated steel sheet product and all dimensional tolerances are defined per Specification A568/A568M , Section 8. 1.5 Units— The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system are not necessarily exact equivalents; therefore, to ensure conformance with the standard, each system shall be used independently of the other, and values from the two systems shall not be combined. 1.6 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.7 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
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