Ferrous metal classification:

Update:29 Mar 2019
Summary:

  First, the classification of steel 1, classified […]

 

First, the classification of steel

1, classified by quality

(1) Ordinary steel (P ≤ 0.045%, S ≤ 0.050%)

(2) High-quality steel (P and S are ≤0.035%)

(3) High-quality steel (P≤0.035%, S≤0.030%)

2. Classified by chemical composition

(1) Carbon steel:

a. low carbon steel (C ≤ 0.25%);

b. medium carbon steel (C ≤ 0.25 ~ 0.60%);

c. High carbon steel (C ≤ 0.60%).

(2) Alloy steel:

a. Low alloy steel (total content of alloying elements ≤ 5%);

b. medium alloy steel (total content of alloying elements > 5~10%);

c. High alloy steel (total content of alloying elements > 10%).