Rockwell hardness C-scale.
Source: API SPEC 5CRA, Specification for Corrosion Resistant Alloy Seamless Tubes for Use as Casing, Tubing and Coupling Stock, Upstream Segment, First Edition, February 2010 (Errata August 2011). Global Standards
Health and Safety Representative.
Source: NOPSEMA Guidance note: Hazard Identification, N-04300-GN0107, Australia, Revision 5, December 2012. Regulatory Guidance