On the Prediction of Strength from Hardness for Copper Alloys

Table 1

Results of regression analysis for hardness-strength data of alloys.

Data type	Property	Regression equation	𝑅^2	Valid range (VHN)	Data points
All	YS	YS=2.874∗VHN	0.916	50–425	120
	UTS	UTS=3.353∗VHN	0.933	50–425	120
Medium; UTS/YS	YS	YS=2.594∗VHN	0.887	50–220	30
	UTS	UTS=3.389∗VHN	0.934	50–220	30
High; UTS/YS	YS	YS=1.97∗VHN	0.845	50–142	26
	UTS	UTS=3.865∗VHN	0.665	50–142	26
Low; UTS/YS	YS	YS=3.018∗VHN	0.933	78–425	64
	UTS	UTS=3.301∗VHN	0.917	78–425	64