Qualifying Child. To be considered a qualifying child, your grandchild must be under the age of 19 on the last day of the tax year, or if he's a full-time student, under the age of 24.No age restrictions apply, however, if your grandchild is permanently and totally disabled.ualifying Child. To be considered a qualifying child, your grandchild must be under the age of 19 on the last day of the tax year, or if he's a full-time student, under the age of 24.
Platinum-iridium alloy. Platinum-iridium alloys are alloys of the platinum group precious metals platinum and iridium. Typical alloy proportions are 90:10 or 70:30 (Pt:Ir). These have the chemical stability of platinum, but increased hardness. The Vickers hardness of pure platinum is 56 HV while platinum with 50% of iridium can reach over 500 HV.
Global High-Temperature Alloy Market is segmented on the basis of type as refractory alloys, super alloys, non-ferrous alloys, and platinum group alloys. Among all the types, the non-ferrous alloys segment is taking up the largest share. High-Temperature Alloy is a type of material that has the endurance to withstand elevated heat levels, intense oxidation potential as well as cycling. In simple words, they are the metal alloys that offer enhanced surface stability and corrosion resistance.