Table 2: The phase composition of Fe-Al-Mn grinding ball

Fe-Al-Mn Grinding Ball	Austenite		Ferrite		Kappa
	Mn (wt%)	Al (wt%)	Mn (wt%)	Al (wt%)	Mn (wt%)	Al(wt%)
Raw Material	16.1	1.2	10.5	4.2	14.2	5.49
Hardened	18.1	1.34	9.75	4.07	12.95	5.39