Brass is a 60:40 copper zinc alloy to which about 1% of tin has been added to improve the corrosion resistance, particularly to dezincification. The allov is a two phase alpha-beta brass. hence has reasonablv high strength with lower ductility than the singlephase 70:30 or alpha brass. lt is used for structural applications and for forgings, especially where contact with sea water is likelto induce corrosion. The mechanical properties are almost indistinguishable from those of 60:40 brass C28000, although the tin addition tends to give slightly higher strength. C46400 can be readily hot worked, and can also be cold worked, but not as easily asthe single phase alpha brasses.

CHEMICAL COMPOSITION

MECHANICAL PROPERTIES ACCORDING TO ASTM B371 (AS PER TEMPER HO2)

Range(Inch)	From	To	UTS Min (ksi)	PS  Min(ksì)	Elongation Min(%)	Hardness Min(HRB)	Hardness Max(HRB)
Round(Dia)	0.059	0.500	60	27	22
	0.500	1.000	60	27	25	60	80
	1.000	2.000	58	26	25	55	80
	2.000	2.953	54	25	25	55	80
Hex(A/F)	0.118	0.500	60	27	22
	0.500	1.000	60	27	25	60	80
	1.000	2.000	58	26	25	55	80
	2.000	2.756	54	25	25	55	80
Square  (A/F)	0.118	0.500	60	27	22
	0.500	1.000	60	27	25	60	80
	1.000	2.362	58	26	25	55	80
Rectangle  (Thickness)	0.1181	0.500	60	27	22
	0.500	1.000	60	27	25	60	80
	1.000	1.968	58	26	25	55	80