Table III

Mean Grid Fill in Percent, for Pt-5%Cu and Pt-5%Ru Cast in Astro-Vest and Platincast
Astro-Vest Platincast Platincast, without 6 duplicate tests at 800 rpm
Pt-5%Cu 44.59 ± 30.76 n = 22 87.22 ± 24.23 n = 36 79.92 ± 27.92 n = 24
Pt-5%Ru 47.13 ± 31.58 n = 22 65.89 ± 36.16 n = 36 60.29 ± 38.94 n = 24

Casting conditions were broadly comparable for flask temperatures and centrifugal speeds. The difference in metal casting temperature of 200°C was to accommodate the higher melting temperature and somewhat lower fluidity of Pt-5%Ru