First, you need 1 iron ore and 2 coal. These can be obtained by mining them or by trading them with other players either manually or through the Grand Exchange. Next, use the coal with a furnace, and there you go! You have made a steel bar.
You cant make alchemy classic, its a game! Though you can download it and play it!
in alchemy classic its 2 bacteria but it might be different in the original (assuming your playing alchemy classic)
lplolol
caoutchouc
Steel=metal+coal
Coal + Metal=STEEL
coal + metal = steel
freezer
steel + metal
4fire + metals
Sand\Earth
Earth + Grass