When the ingredients are together in the smeltery it alloys on its own (while burning):
Bronze 3 copper + 1 tin → 4 · Rose gold copper + gold → 2 · Brass copper + zinc → 2 · Electrum gold + silver → 2 · Constantan copper + nickel → 2 · Invar 2 iron + 1 nickel → 3
Amethyst bronze: copper + 100 mB amethyst → 1 · Slimesteel: iron + 250 slime + 250 seared → 2 · Pig iron: iron + 500 blood + 250 honey → 2
Needs Blazing Blood (1500 °C): Manyullyn 3 cobalt + 1 debris → 4 · Hepatizon 2 copper + 1 cobalt + 400 quartz → 2 · Queen's slime cobalt + gold + 250 magma → 2 · Netherite 4 debris + 4 gold → 1