Geometric size measuring methods of precious metals and their alloy materials
全国有色金属标准化技术委员会
本方法规定了用直接测量法测定贵金属及其合金板、带、管、丝、线、棒材和复合材料几何尺寸的方法。
本方法适用于贵金属及其合金板、带、管、丝、线、棒材和复合材料几何尺寸的测量。测量范围：软金属（纯金和纯银）丝材、线材和棒材直径大于0.1 mm，硬金属丝材、线材和棒材直径大于0.03 mm；软金属（纯金和纯银）带材和板材厚度大于0.1 mm，硬金属带材和板材厚度大于0.05 mm；管材孔径大于3.0 mm。
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