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[交流] 【求助】请教 材料的硬度RcB代表什么意思

美国的图纸上 要求钢管的硬度RcB在62-90,请问这个RcB是什么硬度?
、谢谢@!
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你这个RcB可能是洛氏硬度B级的,即HRB。
HRB: (Sometimes RB) An abbreviation for Rockwell Hardness measured on the B scale.

Rockwell B Hardness: A designation of hardness of metallic materials measured by pressing a small rounded indenter against a clean prepared surface with a specific force. The machine making the indention also measures the depth of the indention and provides a numerical value for that depth. The Rockwell B scale expresses more accuracy in the hardness measurement of metallic materials softer than HRC 20. To convert hardness numbers between measuring methods and scales, see Hardness Number Conversion Chart.
http://www.woodcousa.com/conv_chart.htm
2楼2011-03-22 18:55:59
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