I posted this a little while ago in the unlimited power thread but I figured it would be nice to have on the standardization thread as well. It is the most optimal radiator composition for each outlet temp range.
Lithium: 0K - 452k
(59.1 tons / 100,000m^2 239,000c / 100,000m^2)
Calcium: 425k - 1110k
(172 tons / 100,000m^2 1,000,000c / 100,000m^2)
RCC: 1110k-2270k
(194 tons / 100,000m^2 14,700,000c / 100,000m^2)
Boron: 2270k - 2348k
(230 tons / 100,000m^2 4,000,000c / 100,000m^2)
Boron Nitrade: 2349k - 3244k
(233 tons / 100,000m^2 4,890,000c / 100,000m^2)
Amorphus Carbon: 3245k - 3913k
(233 tons / 100,000m^2 5,200,000c / 100,000m^2)
Pyrolitic Carbon: 3913-3920k
(249 tons / 100,000m^2 5,580,000c / 100,000m^2)
Halfnium Carbide 3920k - 4158k
(1,410 tons / 100,000m^2 86,800,000c / 100,000m^2)
Tantalum Halfnium Carbide: 4158k-4486k
(1,620 tons / 100,000m^2 282,000,000 / 100,000m^2)
RCC is the only one off in terms of costing more than the next step up all the others are in line of higher mass / cost for each step up.