1.1 本规范涵盖热处理合金钢重型六角结构螺栓/螺母/垫圈组件，也称为“套件”，抗拉强度为200至215 ksi。当安装时，这些组件能够通过向螺母或螺栓头施加初始扭矩并随后旋转而产生最小的预定张力，同时防止组件的相对侧旋转。 注1: 中的安装 附录X1 对本产品的正确应用非常重要。 1.2 总成由本规范所涵盖的一个重型六角结构头螺栓、螺母和两个垫圈组成。 1.3 这些组件有1英寸到1英寸的尺寸 1. / 4. 包括在内。 1.4 紧固件组件用于以下环境条件下的结构连接: 1.4.1 室内，通常干燥，包括结构钢嵌入混凝土、包裹在砖石中或由薄膜或非腐蚀性接触型防火材料保护的室内。 1.4.2 室内和室外，通常是干燥的，在屋顶下，安装的组件通过车间应用或现场应用的结构钢系统涂层得到良好保护。 1.5 紧固件组件不适用于以下环境中的结构连接，无论是否通过车间应用或现场应用的涂层对结构钢系统进行保护: 1.5.1 外部不在屋顶下。 1.5.2 化学环境中，溶液中或浓缩液体或固体形式的高浓度高腐蚀性气体、烟雾或化学品接触紧固件或其保护涂层。 1.5.3 重工业环境严重到可以归类为化学环境，如中所述 1.5.2 . 1.5.4 冷凝和高湿度环境保持几乎连续的冷凝，包括淹没在水和土壤中。 1.5.5 阴极保护环境，其中通过牺牲阳极法或直流电源法向结构钢系统施加电流。 1.6 单位-- 以英寸磅为单位的数值应视为标准。本标准不包括其他计量单位。 1.7 以下预防声明仅适用于第节中的试验方法部分 13 部分 14 和 附件A2 本规范的 :本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的使用者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。 1.8 本国际标准是根据世界贸易组织技术性贸易壁垒委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认的标准化原则制定的。 ====意义和用途====== A2.4 意义和用途 A2.4.1 本试验方法描述了用于鉴定ASTM F3111螺栓材料的试验程序，该螺栓由本规范允许的任何钢成分制成。该试验方法测量材料对外部施加电位影响的敏感性（见 A2.7.2.3.2 )通过在盐溶液环境中测试脆化阈值。

1.1 This specification covers heat treated, alloy steel, heavy hex structural bolt/nut/washer assemblies, also referred to as “sets,” having a tensile strength of 200 to 215 ksi. These assemblies are capable of developing a minimum predetermined tension when installed by applying an initial torque followed by rotation to the nut or bolt head, while at the same time preventing the rotation of the opposite side of the assembly. Note 1: The installations in Appendix X1 are important to the proper application of this product. 1.2 An assembly consists of a heavy hex structural head bolt, nut and two washers covered by this specification. 1.3 The assemblies are available in sizes 1 in. to 1 1 / 4 in. inclusive. 1.4 The fastener assemblies are intended for use in structural connections in the following environmental conditions: 1.4.1 Interiors, normally dry, including interiors where structural steel is embedded in concrete, encased in masonry or protected by membrane or noncorrosive contact type fireproofing. 1.4.2 Interiors and exteriors, normally dry, under roof, where the installed assemblies are soundly protected by a shop-applied or field-applied coating to the structural steel system. 1.5 The fastener assemblies are not intended for use in structural connections in the following environments, with or without protection by a shop-applied or field-applied coating to the structural steel system: 1.5.1 Exteriors not under roof. 1.5.2 Chemical environments in which strong concentrations of highly corrosive gases, fumes, or chemicals, either in solution or as concentrated liquids or solids, contact the fasteners or their protective coating. 1.5.3 Heavy industrial environments severe enough to be classified as a chemical environment as described in 1.5.2 . 1.5.4 Condensation and high humidity environments maintaining almost continuous condensation, including submerged in water and soil. 1.5.5 Cathodically protected environments, in which current is applied to the structural steel system by the sacrificial anode method or the DC power method. 1.6 Units— The values stated in inch-pound units are to be regarded as standard. No other units of measurement are included in this standard. 1.7 The following precautionary statement pertains only to the test method portions, Section 13 , Section 14 and Annex A2 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, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.8 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. ====== Significance And Use ====== A2.4 Significance and Use A2.4.1 This test method describes the testing procedure that shall be used to qualify material for use in ASTM F3111 bolts made of any steel composition permitted by this specification. The test method measures the susceptibility of the material to the influence of an externally applied potential (see A2.7.2.3.2 ) by testing for the threshold of embrittlement in a salt solution environment.