CuZn23Al3Co CW703R - EN 1654-1998

Grade	CuZn23Al3Co
European Standard Steel Grade	CW703R
Corresponding Standard	EN 1654-1998 Copper and copper alloys - Strip for springs and connectors
Classification	Copper and Copper Alloys
Density	8.2 g/cm³

CuZn23Al3Co Chemical Element Composition Content (%)

Component	Fe	Ni	Cu	Co	Pb	Al	Sn	Other Total	More
Minimum Value	-	-	72	0.25	-	3	-	-	Zn:余量
Maximum Value	0.05	0.3	75	0.55	0.05	3.8	0.1	0.1	Zn:余量

"Other individual elements or other totals": The chemical composition includes elements not specified in the table. Analysis should only be conducted if these elements are suspected to be present, or if routine analysis suggests that their content may exceed the prescribed limits.

CuZn23Al3Co Mechanical Properties

condition	Mark	Heat Treatment or Condition	Tensile Strength σ_b Mpa	Yield Point σ_s Mpa	Elongation or Extension Rate δ %	Hardness HBW
Strip	CuZn23Al3Co-R660	R660	660~750	≥(580)	≥8ⓐ ；≥10ⓑ
Strip	CuZn23Al3Co-H190	H190				HV: 190~220
Strip	CuZn23Al3Co-R740	R740	740~830	≥(660)	≥3ⓑ
Strip	CuZn23Al3Co-H210	H210				HV: 210~240
Strip	CuZn23Al3Co-R820	R820	≥820	≥(780)	≥2ⓑ
Strip	CuZn23Al3Co-H235	H235				HV: ≥235

Note: The data is for reference only! If you have any questions, please fill out "I want to correct it"!