Rimmed steel typically has approximately what carbon content?

• A. 0.15%
• B. 0.30%
• C. 0.60%
• D. 1.20%

Answer: (A)

Rimmed steel is a low-carbon type designed for maximum ductility and good weldability. Because of its production method, the carbon content stays quite small, typically around a tenth of a percent to a few tenths, with about 0.15% being common. That low carbon level keeps the steel soft and easily formable, which is why it’s favored for applications needing deep drawing or easy shaping. If carbon were higher, the steel would gain strength but lose ductility, shifting away from the rimmed grade characteristics. The other options represent higher-carbon steels used for different purposes, so they don’t match the typical rimmed grade.