In an effort to make better steel, metallurgists experimented by adding other ingredients to make superiour alloys. For example, they added tungsten or molybdenum to create high-speed steel. These tools can withstand the heat buildup created in power jogs. When buying drill bits, be sure to look for ones made of high-speed steel. Chromium and nickel are added to make stainless steel.
Stainless steel is virtually rust-proof.
Early stainless steel knives had one major drawback however, they could not hold a sharp edge the way carbon steel knives could. In addition to creating alloys, manufactuerers also improved the techniques of steel making. In general yes, but there are exceptions. Many hardware stores and home centers offer cheam, bargain-basement tools for only a few dollars. Other cheap tools are case-hardened so that the hard exterior is only a fraction of an inch thick.