3 ms·

And steel actually produces even more CO2 to cast. Carbon steel, melting point 1500C vs aluminium, just 600C. http://www.engineeringtoolbox.com/melting-temperat

• maxerickson 10y ago
  The specific heat is also important, not just temperature. You also have to look at refining (it takes a huge amount of energy to produce raw aluminum) and recycling (steel is really, really recyclable).
  • timthelion 10y ago
    Well they both take more energy to cast than my average bowl of mashed potatoes and peas that's for sure!