What type of sand is used to cast bronze, brass, steel and aluminium? also what are their shrinkage rates and melting points?

What melting points? the sand or the metals?

The metals, I'm more having difficulty with finding the sand compositions.

You already read this, I suppose?

http://en.wikipedia.org/wiki/Sand_casting

they give an example of sand composition.

 

From a friend's experience, an important condition is to dry completely the sand mould before pouring the liquid metal.

 

After few seconds on Google, I've seen many pages giving such information.

Aluminium melts at approximately 660 degrees Celsius , Brass has many compositions some of which melt between 900 - 940 degrees Celsius , Bronze likewise has it's different varieties and one of them melts at 950 degrees Celsius approximately , Steel is a term for many Iron alloys and a Cast Iron alloy for reference melts at approximately 1260 degrees Celsius .

 

Do you want to melt some metal and pour a casting ?

 

Edit : A capital C for Celsius .

Edited September 21, 201114 yr by Hal.

I know that Ethalpy said this, but I'm repeating it.

Dry sand can be used as a mould for any of those metals.

Slightly dap sand can be used to spray molten metal about the place and give you a nasty, or even fatal set of burns.

This is for an assignment, I have all the information I need now except for shrinkage rates, thank you everyone who's replied.