Mold Steel Comparison: P20 vs H13 vs S136 vs NAK80：核心技术要点...
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<p>Steel comparison:</p>
<p>P20: HRC 28-32, general purpose</p>
<p>H13: HRC 45-52, hot work</p>
<p>S136: HRC 48-52, mirror polish</p>
<p>NAK80: HRC 37-43, pre-hardened</p><p>
<strong>延伸阅读</strong></p>
<p>• <a href="/t/return-pin/617">回针（Return Pin）</a></p>
<p>• <a href="/t/taper-lock/606">锥形精定位（Taper Lock）</a></p>
<p>• <a href="/t/ejector-pin/624">顶针（Ejector Pin）注塑模具用</a></p><hr>
<p>踩过坑的来评论区说说。</p>