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3•2•2 National Analysis & Testing System
国家分析测试系统
Because national standard method system can not fully satisfy the requirements of large amount of analysis work of laboratories, National Analysis & Testing System (NAS) has been established in China, which acts as the supplementary of national standard methods•NAS methods are recognized analysis & testing methods and cover various specialties•Methods related to metallic specialty are in charged by Chinese Society of Metals and issued in the form of recommendation methods of Chinese Society of Metals (CSM- standards)•NAS methods have features of practicability———accurate, reliable and easy operation, and polyphyly———multimethods coexisting is allowable in precondition of comparability, and systematicality———forming series as per measured objects and covering as many measured items as possible, and advance———absorbing new technologies and methods, and dynamic———renewing in time•At the present, more than 3 000 recommended CSM-standards have been issued, classified into 10 categories, i•e•ore analysis, refractory material analysis, ferroalloy analysis, metallurgical material analysis, indissoluble and intermediate alloy analysis, iron and steel analysis, other metallic products analysis, status analysis, analysis of gas elements in metals•A-mong these CSM methods, 1 192 methods are for iron and steel materials, covering 6 types of materials (pig iron, low alloy steel, alloy steel, tool steel, superalloy and metallic functional materials) and 43 measuring items•
由于国家标准方法系统不能完全满足大量的实验室分析工作要求，中国建立了国家分析测试系统（NAS），作为国家标注方法的补充。NAS方法是被认可的分析测试方法，并且涵盖各个专业。中国金属协会主管金属专业相关的方法，该方法定期以协会推荐方法形式发布（行业标准）。NAS方法具有实用性――准确，可信与易操作性，灵活性――在兼容性的前提下，允许多种方法共存，系统性――每种测量目标拥有尽可能多的测量方法，先进性――吸收了新方法新技术――，动态更新特性――及时更新等突出特点。目前，已经超过3000中推荐行业标准已经发布，分为10大类，比如矿石分析，回收材料分析，铁合金分析，冶金材料分析，不溶物与中间合金分析，钢铁分析，其它金属产品分析，状态分析，金属中气体元素分析。这些标准中，有1192个是为钢铁材料分析设立，涵盖6类材料（生铁，低合金钢，合金钢，工具钢，超合金与金属功能材料），共43个测试条目。 |
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