There are various classification methods for steel, and the main methods are as follows: 1. Classification by quality  (1) Ordinary steel (P ≤ 0.045%, s ≤ 0.050%)  (2) High quality steel (P and s ≤ 0.035%)  (3) High quality steel (P ≤ 0.035%, s ≤ 0.030%) 2. Classification by chemical composition  (1) Carbon steel: A. … Continue reading Classification of steel