gasta -gat- gismu

x1 is a quantity of/is made of/contains steel of composition including x2.

See also jinme, molki, tirse.


In notes:

jinme
x1 is a quantity of/contains/is made of made of metal of composition including x2.
molki
x1 is a mill/foundry/industrial plant/[assembly line] performing process x2.
tirse
x1 is a quantity of/contains/is made of iron (Fe); [metaphor: strong, durable, tarnishing].