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Material:RO5200,RO5400
Specification:dia20mm--100mm*H
Standard: ASTM B365-98
Purity:99.95%--99.99%

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Table 1:Chemical composition:

Chemistry %
Designation	Chief component		Impurities maxmium
	Ta	Nb	Fe	Si	Ni	W	Mo	Ti	O	C	H	N
Ta1	Remainder	0.03	0.004	0.003	0.002	0.004	0.006	0.002	0.01	0.004	0.0015	0.002
Ta2	Remainder	0.08	0.01	0.01	0.005	0.02	0.02	0.005	0.015	0.01	0.0015	0.01