Sigma E is intended for aluminium and aluminium alloys as well as for zinc and zinc alloys melting in fuel-fired and electric furnaces.
Sigma HT is intended for melting copper-based alloys in fuel furnaces.
BNI, due to its shape, provides high resistance to flame attack and offers enhanced performance in heavy duty applications such as aluminium scrap melting and other fuel fired applications.
Sigma Typical Metal Casting Temperature
Sigma E 450°C - 900°C (842°F - 1652°F).
Sigma HT 900°C - 1600°C (1652°F - 2912°F).
BNI 700°C - 1400°C (1292°F - 2552°F).
Sigma HT crucibles are finished with a black coloured coating and the models are suffixed with the letters 'HT'.
Sigma E crucibles are finished with a grey coloured coating.
BNI crucibles are finished with a grey coloured coating and models are prefixed with the letters 'BNI'.
Sigma crucibles are available in a comprehensive range of shapes and sizes to suit most end user requirements.