... HCl and HNO3 at room temperature.b. The content of N, H, O, C will increase in the air.c ... .5-60—200 mesh0<0.25,H<0.03,N<0.03,Fe<0.05>99.5-200 mesh0<0. ... 45,H<0.03,N<0.03,Fe<0.0599.4—99.240—200 mesh0< ... 0.3, H<0.04,N<0.04,Fe<0. ... 99.2-200 mesh0<0.6, H<0.05,N<0.05,Fe<0.06Pure titanium scrap powder95—99 ... 325 meshH<0.02,0<0.2, Fe<0.03,N<0.02>88-40—325 meshH<0.01,0 ...