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    <title>小口径精密光亮管</title>
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    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
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    <title>20钢83*4精密光亮管</title>
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    <description><![CDATA[<p><strong><span style="font-size:18px;">精密钢</span><span style="font-size:18px;">管、<a href="http://www.sdtyggzz.com" target="_blank">精密光亮管</a></span><span style="font-size:18px;">20钢83*4精密无缝钢管</span></strong></p>
<p><strong><span style="font-size:18px;"><img title="20#83*4光亮精密钢管" border="0" alt="20#83*4光亮精密钢管" src="/UpFile/202003/2020032663758017.jpg" /></span></strong></p>
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    <title>20#精密光亮管60*2.75</title>
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    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
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<p>&nbsp;</p>
<p><img src="/UpFile/201506/2015060540444013.jpg" title="20#32x3精密光亮钢管，长度11米左右" alt="20#32x3精密光亮钢管，长度11米左右" border="0" /></p>]]></description>
    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
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    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
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    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
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    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
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    <title>山东通圆钢管（精密钢管厂），专业生产各种材质精密钢管</title>
    <link>http://www.sdtyggzz.com/jmglg/655.html</link>
    <description><![CDATA[<img src=&#34;/UpFile/201503/2015031735783081.jpg&#34; title=&#34;20#外径52.7mm精密光亮管&#34; alt=&#34;20#外径52.7mm精密光亮管&#34; border=&#34;0&#34; /><br />]]></description>
    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
    <category><![CDATA[精密光亮管]]></category>
    <author><![CDATA[山东通圆钢管制造有限公司]]></author>
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<item>
    <title>精密光亮管</title>
    <link>http://www.sdtyggzz.com/jmglg/607.html</link>
    <description><![CDATA[<div align="center"><img src="/UpFile/201503/2015031111306206.jpg" alt="" border="0" /><br />
<br />
<div align="left"><div class="para">精密光亮管淬火得到马氏体组织后，在450～600℃温度范围回火；或在650℃回火后以缓慢冷却速度经过350～600℃；或者在650℃回火后，在350～650℃温度范围长期加热，都使精密光亮管产
生脆化现象如果已经脆化的20#精密钢管重新加热到650℃然后快冷，可以恢复韧性，因此又称为%26ldquo;可逆回火脆性%26rdquo;高温回
火脆性表现为精密光亮管的韧性一脆性转化温度的升高。高温回火脆性。敏感度...</div></div></div>]]></description>
    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
    <category><![CDATA[精密光亮管]]></category>
    <author><![CDATA[admin]]></author>
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<item>
    <title>精密光亮管</title>
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    <description><![CDATA[<div align="center"><img src="/UpFile/201503/2015031111071239.JPG" alt="" border="0" /><br />
<br />
<div align="left"><p class="headline-1"><span class="headline-content">精密光亮管常用材质化学成分</span></p>
<p class="headline-1"></p>
<div class="para">10# 0.07~0.13 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035</div>
<div class="para">20# 0.17~0.23 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035</div>
<div class="para">35# 0.32~0.39 0.17~0.37 0.35~0.65 ≤0.035 ≤0.035</div>
<div class="para">45# 0.42~0.50 0....</div></div></div>]]></description>
    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
    <category><![CDATA[精密光亮管]]></category>
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<item>
    <title>精密光亮管</title>
    <link>http://www.sdtyggzz.com/jmglg/602.html</link>
    <description><![CDATA[<div align="center"><img src="/UpFile/201503/2015031110907249.JPG" alt="" border="0" /><br />
<br />
<div align="left"><p class="headline-1"><span class="headline-content">压力计算公式</span></p>
<p class="headline-1"></p>
<div class="para">一：已知无缝光亮管外径、规格、壁厚求能承受压力计算方法(钢管不同材质抗拉强度不同)</div>
<div class="para">压力=(壁厚*2*钢管材质抗拉强度)/(外径*系数)</div>
<div class="para">二：已知无缝管无缝钢管外径和承受压力求壁厚计算方法：</div>
<div class="para">壁厚...</div></div></div>]]></description>
    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
    <category><![CDATA[精密光亮管]]></category>
    <author><![CDATA[admin]]></author>
</item>
<item>
    <title>精密光亮管</title>
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    <description><![CDATA[<div align="center"><sub><img src="/UpFile/201503/2015031110563062.gif" title="精密光亮管" alt="精密光亮管" border="0" /></sub><sub><br />
<br />
</sub><div align="left"><p><sub><span style="font-size:14px;">精密光亮管</span><span style="font-size:14px;">是一种通过</span><span style="font-size:14px;">精拔</span><span style="font-size:14px;">或</span><span style="font-size:14px;">冷轧</span><span style="font-size:14px;">处理后的一种高</span><span style="font-size:14px;">精密</span><span style="...</p></div></div>]]></description>
    <pubDate><![CDATA[2026/4/19 12:36:24]]></pubDate>
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