1.1 本规范 2 涵盖高温或高压服务或其他特殊用途应用的压力容器、阀门、法兰和配件的合金和不锈钢螺栓材料和螺栓部件。参见质量标准 A962/A962M 螺栓连接的定义。棒材和线材应热锻，可通过无心磨削或冷拉进一步加工。奥氏体不锈钢可以是碳化物固溶处理的或碳化物固溶处理和应变硬化的。订购应变硬化奥氏体不锈钢时，买方应特别注意确保 附录X1 是完全理解的。 1.2 涵盖了几个等级，包括指定为B5、B8等的铁素体钢和奥氏体不锈钢。选择将取决于设计、使用条件、机械性能和高温特性。1.3 以下引用的一般要求对于本规范的应用是必不可少的: A962/A962M . 附注1: 制定本规范的委员会包括了几种已广泛用于本目的的钢种。随着需要变得明显，委员会将不时考虑纳入其他组成。 附注2: 对于适用于较低范围高温应用的合金钢螺栓等级，应参考规范 A354 . 附注3: 对于适用于低温应用的合金钢螺栓等级，应参考规范 A320/A320M . 1.4 与螺栓连接一起使用的螺母包含在第节中 13 . 1.5 提供补充要求供买方选择使用。补充要求仅在定购单或合同中规定时适用。 1.6 本规范以英寸-磅单位和国际单位制单位表示；但是，除非采购订单或合同规定了适用的 米 规格名称（SI单位），应适用英寸-磅单位。 1.7 以SI单位或英寸-磅单位表示的值应单独视为标准值。在正文中，国际单位制单位显示在括号中。每个系统中陈述的值可能不完全等同；因此，每个系统应独立使用。合并两个系统的值可能导致不符合标准。 1.8 本国际标准是根据世界贸易组织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e（技术性贸易壁垒）委员会。

1.1 This specification 2 covers alloy and stainless steel bolting materials and bolting components for pressure vessels, valves, flanges, and fittings for high temperature or high pressure service, or other special purpose applications. See Specification A962/A962M for the definition of bolting. Bars and wire shall be hot-wrought and may be further processed by centerless grinding or by cold drawing. Austenitic stainless steel may be carbide solution treated or carbide solution treated and strain-hardened. When strain hardened austenitic stainless steel is ordered, the purchaser should take special care to ensure that Appendix X1 is thoroughly understood. 1.2 Several grades are covered, including ferritic steels and austenitic stainless steels designated B5, B8, and so forth. Selection will depend upon design, service conditions, mechanical properties, and high temperature characteristics. 1.3 The following referenced general requirements are indispensable for application of this specification: Specification A962/A962M . Note 1: The committee formulating this specification has included several steel types that have been rather extensively used for the present purpose. Other compositions will be considered for inclusion by the committee from time to time as the need becomes apparent. Note 2: For grades of alloy-steel bolting suitable for use at the lower range of high temperature applications, reference should be made to Specification A354 . Note 3: For grades of alloy-steel bolting suitable for use in low temperature applications, reference should be made to Specification A320/A320M . 1.4 Nuts for use with bolting are covered in Section 13 . 1.5 Supplementary Requirements are provided for use at the option of the purchaser. The supplementary requirements shall apply only when specified in the purchase order or contract. 1.6 This specification is expressed in both inch-pound units and in SI units; however, unless the purchase order or contract specifies the applicable M specification designation (SI units), the inch-pound units shall apply. 1.7 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. 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.