Or 5-250mm in diameter, of which 5-9mm is often used as raw material for drawing steel wire, called wire; Because it is supplied in rolls, it is also called hot-rolled wire rod. Forged round steel is thick and used as shaft blank. The diameter of cold-drawn round steel is 3- 100 mm, with high dimensional accuracy.
Extended data:
Steel is an iron-carbon alloy with a carbon content between 0.04% and 2.3%. In order to ensure its toughness and plasticity, the carbon content generally does not exceed 1.7%. Besides iron and carbon, the main elements of steel are silicon, manganese, sulfur and phosphorus. There are many ways to classify steel, and the main methods are as follows:
1, classified by quality.
(1) Ordinary steel (P≤0.045%, S≤0.050%)
(2) High quality steel (both P and S are ≤0.035%)
(3) High quality steel (P≤0.035%, S≤0.030%)
2. Classification by chemical composition.
(1) carbon steel: low carbon steel (c ≤ 0.25%); Medium carbon steel (C ≤ 0.25-0.60%); High carbon steel (C≤0.60%).
(2) Alloy steel: low alloy steel (total content of alloy elements ≤ 5%); Medium alloy steel (total content of alloying elements >; 5- 10%); High alloy steel (total content of alloying elements >; 10%)。
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