ASTM F1941-2007 螺纹紧固件电镀层的标准规范(统一的英制螺纹(UN/UNR))
【英文标准名称】: Standard Specification for Electrodeposited Coatings on Threaded Fasteners (Unified Inch Screw Threads (UN/UNR)) 【原文标准名称】: 螺纹紧固件电镀层的标准规范(统一的英制螺纹(UN/UNR)) 【标准号】: ASTM F1941-2007 【标准状态】: 现行 【国别】: 【发布日期】: 2007 【实施或试行日期】: 【发布单位】: 美国材料与试验协会(US-ASTM)【起草单位】: F16.03【标准类型】: (Specification)【标准水平】: ()【中文主题词】: 铬酸盐;覆层厚度;覆层;耐腐蚀性;紧固件;质量要求;表面处理;螺纹紧固件【英文主题词】: Electrodeposited coatings; Screw thread; Threaded fasteners; Unified inch screw threads (UN/UNR)【摘要】: 1.1 This specification covers application, performance and dimensional requirements for electrodeposited coatings on threaded fasteners with unified inch screw threads. It specifies coating thickness, supplementary hexavalent chromate or trivalent chromite finishes, corrosion resistance, precautions for managing the risk of hydrogen embrittlement and hydrogen embrittlement relief for high-strength and surface-hardened fasteners. It also highlights the differences between barrel and rack plating and makes recommendations as to the applicability of each process. 1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard. 1.3 The following precautionary statement pertains to the test method portion only, Section 9, of this specification: 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 and health practices and determine the applicability of regulatory limitations prior to use.【中国标准分类号】: A29;J13【国际标准分类号】: 25_220_40【页数】: 10P.;A4【正文语种】:
这个 螺纹紧固件电镀层的标准规范相当不错, 也想要一份
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