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Chemical Composition & Physical Properties

Grade	Chemical Composition (mass fraction) %
	Cu	Fe 1)	Pb	Al	Mn	Sn	Ni 4)	Zn	Total impurity content
H68	67.0~70.0	0.10	0.03	-	-	-	0.5	remain	0.3

Grade	Condition	Tensile Test			Hardness Test
		Thickness/mm	Tensile Rm/ (N/mm2)	Elongation after fracture %	HV	HRB
H68	M	≥ 0.2	≥290	≥40	≤90	-
	Y4		325~410	≥35	85~115
	Y2		355~460	≥25	100~130
	Y		410~540	≥13	120~160
	T		520~620	≥4	150~190
	TY		≥570	-	≥180