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Rockwell Hardness Tester (view source)
Revision as of 20:38, 17 January 2018
, 20:38, 17 January 2018no edit summary
! Trained By
! Trained By
|-
|-
|Dean Anderson
|NA
|Danger committee
|Danger committee
|}
|}
== Rockwell Hardness ==
== Rockwell Hardness ==
Copied from Wikipedia. See Wikipedia for additional background
Copied from Wikipedia. See Wikipedia for additional background
== Operation ==
===Typical values===
* Very hard steel (e.g. chisels, quality [[List of blade materials|knife blades]]): HRC 55–66 (Hardened High Speed Carbon and Tool Steels such as M2, W2, O1, CPM-M4, and D2, as well as many of the newer powder metallurgy Stainless Steels such as S30V, CPMS-154, ZDP-189, etc.)<ref>[https://web.archive.org/web/20080531085629/http://www.cutleryscience.com/reviews/blade_materials.html Knife blade materials]</ref>
* [[Axe]]s: about HRC 45–55
* Brass: HRB 55 (Low brass, UNS C24000, H01 Temper) to HRB 93 (Cartridge Brass, UNS C26000 (260 Brass), H10 Temper)<ref>[http://www.matweb.com matweb.com], accessed 2010-06-23</ref>
Several other scales, including the extensive A-scale, are used for specialized applications. There are special scales for measuring [[Case hardening|case-hardened]] specimens.
== Notes ==
== Notes ==