In the context of measuring weight or mass, a "brass" is not a commonly used unit. It is more commonly used as a unit of volume in the construction industry. However, I can provide conversions for tons to other commonly used units:
1 ton (short ton) is equal to 2,000 pounds or approximately 0.907 metric tons.
1 ton (metric ton) is equal to 1,000 kilograms or approximately 2,204.62 pounds.
If you can provide more information about the specific context or definition of "brass" you are referring to, I can try to assist you further.