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按GB310-64的规定,常用工业纯铝的牌号为L_1～L_7,其杂质含量在0.30 ％至2％之间。纯铝的比重为2.7;导电性、导热性好;在空气和水蒸汽中有相当强的耐蚀性;在浓硝酸和多种有机酸中的化学稳定性很高;加工工艺性能好。所以尽管各种铝合金不断发展,但工业纯铝仍然广泛地应用在各个工业部门中。我厂生产J33W-6L型浓硝酸截止阀(铝活门)的材质为工业纯铝。
According to the provisions of GB310-64, commonly used industrial grade aluminum L_1 ~ L_7, the impurity content of 0.30% to 2%. Pure aluminum has a specific gravity of 2.7; good electrical and thermal conductivity; very strong corrosion resistance in air and water vapor; high chemical stability in concentrated nitric acid and various organic acids; good process performance. So despite the continuous development of various aluminum alloys, industrial pure aluminum is still widely used in various industrial sectors. I plant the production of J33W-6L-type concentrated nitric acid shut-off valve (aluminum valve) made of industrial pure aluminum.