1.1 这些试验方法包括化学成分在以下范围内的铬和铬铁的化学分析: 要素 作文 % 铝 最大0.25 锑 最大0.005 砷 最大0.005 铋 最大0.005 硼 最大0.005 碳 最大9.00 铬 51.0至99.5 钴 最大0.10 哥伦布 最大0.05 铜 最大0.05 领导 最大0.005 锰 最大0.75 钼 最大0.05 镍 最大0.50 氮 最大6.00 磷 最大0.03 硅 最大12.00 银 最大0.005 硫黄 最大0.07 钽 最大0.05 锡 最大0.005 钛 0 最大50 钒 最大0.50 锌 最大0.005 锆 最大0.05 1.2 分析程序按以下顺序显示: 章节 钼蓝分光光度法测定砷 [0001 % 至0.005 %] 10– 20 双硫腙分光光度法测定铅 [0001 % 至0.05 %] 21– 31 过氧化钠熔融滴定法测定铬 [50.00 % 至99.5 %] 32– 38 1.3 单位- 以国际单位制表示的数值应视为标准。本标准中不包括其他计量单位。 1.4 本标准并非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。 具体危害说明见第节 6. 以及贯穿这些试验方法的特殊“警告”段落。 1.5 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====== 4.1 这些用于铬金属和铬铁合金化学分析的试验方法主要用于测试这些材料是否符合成分规范，如规范 第101页 和 A481 .假设所有使用这些测试方法的人员都是经过培训的分析员，能够熟练、安全地执行常见的实验室程序。预计工作将在设备齐全的实验室中进行。

1.1 These test methods cover the chemical analysis of chromium and ferrochromium having chemical compositions within the following limits: Element Composition, % Aluminum 0.25 max Antimony 0.005 max Arsenic 0.005 max Bismuth 0.005 max Boron 0.005 max Carbon 9.00 max Chromium 51.0 to 99.5 Cobalt 0.10 max Columbium 0.05 max Copper 0.05 max Lead 0.005 max Manganese 0.75 max Molybdenum 0.05 max Nickel 0.50 max Nitrogen 6.00 max Phosphorus 0.03 max Silicon 12.00 max Silver 0.005 max Sulfur 0.07 max Tantalum 0.05 max Tin 0.005 max Titanium 0.50 max Vanadium 0.50 max Zinc 0.005 max Zirconium 0.05 max 1.2 The analytical procedures appear in the following order: Sections Arsenic by the Molybdenum Blue Spectrophotometric Test Method [0.001 % to 0.005 %] 10 – 20 Lead by the Dithizone Spectrophotometric Test Method [0.001 % to 0.05 %] 21 – 31 Chromium by the Sodium Peroxide Fusion-Titrimetric Test Method [50.0 % to 99.5 %] 32 – 38 1.3 Units— The values stated in SI units are to be regarded as standard. No other units of measurement are included in this standard. 1.4 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. Specific hazard statements are given in Section 6 and in special “Warning” paragraphs throughout these test methods. 1.5 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 ====== 4.1 These test methods for the chemical analysis of chromium metal and ferrochromium alloy are primarily intended to test such materials for compliance with compositional specifications such as Specifications A101 and A481 . It is assumed that all who use these test methods will be trained analysts capable of performing common laboratory procedures skillfully and safely. It is expected that work will be performed in a properly equipped laboratory.