List 3 methods thatare most used in classification for carbon steel.
举一反三
- High-speed steel is also___________________(know) as self-hardening steel.
- The classification and grade of steel are（）
- When carbon is added to iron in proper _________ the result is steel.
- To improve the machinability of low carbon steel, the heat treatment process usually used is ( ) . A: quenching B: tempering C: annealing D: normalizing
- If the carbon content of a type of steel is 0.1%， this steel is a kind of （ ）. A: low-carbon steel B: medium-carbon steel C: high-carbon steel D: HTLA steel