1.1 本规范涵盖了用于热浸镀锌的锌母合金，目的是调节熔融锌浴中某些合金元素的浓度。 表1 包括六种锌铝中间合金（光亮剂）和一种锌锑中间合金。 美国宇航局 常见的 联合国系统 A-1型 90/10锌/铝 高纯度 Z30750 A-2型 90/10锌/铝 低纯度 Z31710型 A-3型 95/5  锌/铝 高纯度 Z30503型 A-4型 95/5  锌/铝 低纯度 Z31510型 A-5型 96/4  锌/铝 高纯度 Z31520型 A-6型 96/4  锌/铝 低纯度 Z30504型 S-1型 90/10锌/锑 Z55710 注1: 规范中的中间合金 B860型 主要用于热浸镀锌，以调节熔融锌浴中某些元素的浓度，与规范中的锌铝合金不同 1997年 其主要用于熔融锌铝。 1.2 以英寸-磅单位表示的数值应视为标准值。括号中给出的数值是国际单位制的数学转换，仅供参考，不被视为标准。 1.3 本标准并不旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任熟悉所有危险，包括制造商提供的该产品/材料的适当安全数据表（SDS）中确定的危险，建立适当的安全、健康和环境实践，并在使用前确定监管限制的适用性。 1.4 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》中确立的国际公认标准化原则制定的。

1.1 This specification covers zinc master alloys which are used in hot dip galvanizing for the purpose of adjusting the concentration of certain alloying elements in the molten zinc bath. Table 1 covers the chemical composition of these materials which include six master alloys of zinc-aluminum (brightener) and one master alloy of zinc-antimony. ASTM Common UNS Type A-1 90/10 Zn/Al High Purity Z30750 Type A-2 90/10 Zn/Al Low Purity Z31710 Type A-3 95/5  Zn/Al High Purity Z30503 Type A-4 95/5  Zn/Al Low Purity Z31510 Type A-5 96/4  Zn/Al High Purity Z31520 Type A-6 96/4  Zn/Al Low Purity Z30504 Type S-1 90/10 Zn/Sb Z55710 Note 1: The master alloys in Specification B860 are intended to be used primarily in hot-dip galvanizing to adjust the concentration of certain elements in a molten zinc bath, and differ from the zinc-aluminum alloys in Specification B997 which are intended to be used primarily in molten zinc-aluminum. 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 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 become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use. 1.4 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.