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<p>16Mn无缝钢管<br />
16Mn为低合金高强度结构钢：含碳量为0.1%-0.25%,加入主要合金元素锰、硅、钒、铌和钛等；它的含合金总量<3%。按强度分为300、350、400和450MPa等4个级别。主要有Q295、Q345、Q390、Q420、Q460。“Q”是屈服的“屈”字的汉语拼音大写字头，其后数字为该牌号最小屈服点（σs）值，其后的符号是按...</p>]]></description>
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