Rockwell Hardness
Embed This Widget
Add the script tag and a data attribute to embed this widget.
Embed via iframe for maximum compatibility.
<iframe src="https://alloyfyi.com/iframe/glossary/rockwell-hardness/" width="420" height="400" frameborder="0" style="border:0;border-radius:10px;max-width:100%" loading="lazy"></iframe>Paste this URL in WordPress, Medium, or any oEmbed-compatible platform.
https://alloyfyi.com/glossary/rockwell-hardness/Add a dynamic SVG badge to your README or docs.
[](https://alloyfyi.com/glossary/rockwell-hardness/)Use the native HTML custom element.
Add one script tag to your page:
<div data-alloyfyi="glossary" data-slug="rockwell-hardness"></div>
<script src="https://cdn.jsdelivr.net/npm/alloyfyi-embed@1/dist/embed.min.js" defer></script>
Embed as an iframe:
<iframe src="https://alloyfyi.com/iframe/glossary/rockwell-hardness/?style=modern&theme=light" width="420" height="400" frameborder="0" loading="lazy" style="border:0;border-radius:10px;max-width:100%"></iframe>
Paste the URL in WordPress, Medium, or Ghost:
https://alloyfyi.com/zh-hans/glossary/rockwell-hardness/
Web Component:
<alloyfyi-glossary slug="rockwell-hardness"></alloyfyi-glossary>
<script src="https://cdn.jsdelivr.net/npm/alloyfyi-embed@1/dist/embed.min.js" defer></script>
Testing & Standards
Definition
A hardness test that measures the depth of penetration of an indenter under a major load relative to its position under a minor (preload) load. Results are reported on various scales (HRA, HRB, HRC, etc.) depending on the indenter and load used.
Detailed Explanation
The HRC scale (diamond Brale indenter, 150 kg major load) is used for hard steels and tool materials, with case-hardened surfaces typically measuring 58–65 HRC. The HRB scale (1/16-inch ball, 100 kg load) is used for softer materials such as annealed steels, copper alloys, and aluminum alloys. Rockwell hardness testing is fast, simple, and minimally destructive, making it the most widely used method on the shop floor.