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标题: ASTM B777-2007 钨基高密度金属用标准规范 [打印本页]

作者: sigh007 时间: 2012-3-26 18:41:54 标题: ASTM B777-2007 钨基高密度金属用标准规范

【英文标准名称】: Standard Specification for Tungsten Base, High-Density Metal 【原文标准名称】: 钨基高密度金属用标准规范【标准号】: ASTM B777-2007 【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】: B10.04【标准类型】: (Specification)【标准水平】: ()【中文主题词】: 重金属;金属;有色金属;难熔金属;钨【英文主题词】: high-density metal; tungsten【摘要】: 1.1 This specification covers the requirements for four classes of machinable, high-density tungsten base metal produced by consolidating metal powder mixtures, the composition of which is mainly tungsten. This material specification may be used for bare parts or for parts that may be coated with other materials for protection against corrosion and abrasion. 1.2 Intended Use8212

arts made from this material are intended for uses such as weights or counter-balances in static or dynamic balancing, high-speed rotating inertia members, radiation shielding, hypervelocity impact, and vibration-damping applications.1.3 Special Applications8212;For particular applications, properties or requirements other than those specified in Sections 5, 6, and 7 of this specification may be important. These alloys may contain elements which make them magnetic. Where freedom from magnetic response is required, this should be specified in the purchase order. Class 4 is not available in a non-magnetic grade. For purposes of this specification, non-magnetic material is defined as material having a maximum magnetic permeability of 1.05 (see Test Method B 193). Also for special applications involving large sections, methods for determining internal quality, such as mechanical tests on specimens from these larger sections or suitable nondestructive tests may be applied. If required, these additional tests shall be specified in the purchase order.1.4 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.【中国标准分类号】: H63【国际标准分类号】: 77_120_99【页数】: 3P.;A4【正文语种】:

作者: fhww2000 时间: 2016-10-3 17:30:20

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作者: fisker1998 时间: 2018-3-28 08:54:44

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