DL T 674-1999 火电厂用20号钢珠光体球化评级标准.pdf
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本标准规定了火电厂用20号钢珠光体球化的评级方法。本标准适用于按GB 3087、GB 5310标准供货的20号钢火电厂管道、管件在高温下长期使用后的珠光体球化等级评定,也适用于用20号钢钢板、条钢、型钢制造的构件在高温下长期使用后的珠光体球化等级评定。其它与20号钢相类似的材料亦可参照执行。
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- DL 674 1999 火电厂 20 钢珠 光体球化 评级 标准
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