Si 72 – 77%
Al 1,4 % (2,0 % max)
C 0,15% (0,2 % max)

1-3mm, 3-10mm (min 80% inom intervallet)

Ferrokisel

Si 74 – 78%
Al 1,2% (1,5% max)
C 0,08% (0,10% max)
S 0,01% (0,03% max)

10-50mm (min 80% inom intervallet)