77 : Metallurgy

77.020

Production of metals

77.040

Testing of metals

77.060

Corrosion of metals

77.080

Ferrous metals

77.100

Ferroalloys

77.120

Non-ferrous metals

77.140

Iron and steel products

77.150

Products of non-ferrous metals

77.160

Powder metallurgy

77.180

Equipment for the metallurgical industry