mild steel 
noun [mass noun]
Steel which contains only a small percentage of carbon and is strong and easily worked but not readily tempered or hardened.The high-melting-point solders are suitable for soldering mild steel, stainless steel, nickel, copper, brass, zinc, and silver directly to aluminum....
- The company plans to produce mild steel, stainless steel, aluminium, copper and brass on the site.
- These are made of mild steel, stainless steel, or copper, and are placed under the joint and subsequently removed when the weld has been completed.
- make a market
- make a match
- make a meal of
- make a mess
- make a mess of
- make a mockery of
- make (a) mock of
- make a monkey of (or out of) someone
- make a mountain out of a molehill
- make a move
- make a move on (or put the moves on)
- make a muck of
- make a name for oneself
- make an ass of oneself
- make-and-break
- make an effort
- make an end of
- make an enemy of
- make an example of
- make an exhibition of oneself
- make an honest woman of
- make an issue of
- make a noise
- make an (or one's) entrance
- make a (or no) difference