Copper Alloys Overview

Alloy Physical Properties

Copper Alloys Overview

RWMA Class Alloy Grade Composition Minimum Hardness Rockwell Minimum Electrical Conductivity
Class UNS Number Principal Elements Up to 1” Dia %IACS Min.
Class 1 C15000 Cu, Zr HRB 65 80
Class 2 C18200 Cu, Cr HRB 75 75
Class 2 C18150 Cu, Cr ,Zr HRB 75 75
Class 3 C17510 Cu, Ni, Be HRB 90 45
Class 3 C18000 Cu, Ni, Si, Cr HRB 90 45
Class 4 C17200 Cu, Be HRC 33 20
Class 10 n/a Cu, W HRB 72 45
Class 11 n/a Cu, W HRB 94 40
Class 12 n/a Cu, W HRB 98 35
Class 13 n/a W HRA 69 30
Class 14 n/a Mo HRB 85 30
Class 20 C15760 Cu, Al oxide HRB 75 75