Steel classification

Steel Classification: 7 Major Categories

Steel is an iron-carbon alloy containing between 0.04% and 2.3% carbon. To maintain its toughness and ductility, the carbon content typically does not exceed 1.7%. In addition to iron and carbon, other key elements in steel include silicon, manganese, sulfur, and phosphorus. There are multiple ways to classify steel, and the most common methods are as follows:
1. Classification by Quality
(1) Carbon Steel
(2) High-Quality Steel
(3) Ultra-High-Quality Steel

2. Classification by Chemical Composition
(1) Carbon Steel:
a. Low Carbon Steel
b. Medium Carbon Steel
c. High Carbon Steel
(2) Alloy Steel:
a. Low Alloy Steel
b. Medium Alloy Steel
c. High Alloy Steel

3. Classification by Manufacturing Process
(1) Forged Steel
(2) Cast Steel
(3) Hot-Rolled Steel
(4) Cold-Drawn Steel

4. Classification by Purpose
(1) Structural Steel for Construction and Engineering:
a. Ordinary Carbon Structural Steel
b. Low Alloy Structural Steel
(2) Machine Building Structural Steel:
a. Quenched and Tempered Structural Steel
b. Surface Hardened Structural Steel (including carburized, nitrided, and surface-hardened steels)
c. Free-Machining Structural Steel
d. Cold Forming Steel (such as cold stamping and cold heading steel)
b. Spring Steel
c. Bearing Steel
(3) Tool Steel:
a. Carbon Tool Steel
b. Alloy Tool Steel
c. High-Speed Tool Steel
(4) Special Performance Steel:
a. Stainless and Acid-Resistant Steel
b. Heat-Resistant Steel (including oxidation-resistant, heat-strength, and gas valve steels)
c. Electrothermal Alloy Steel
d. Wear-Resistant Steel
e. Electrical Steel
(5) Specialized Steels: such as bridge steel, shipbuilding steel, boiler steel, pressure vessel steel, agricultural machinery steel, etc.

5. Comprehensive Classification
(1) Ordinary Steel
a. Carbon Structural Steel: Q195, Q215 (A, B), Q235 (A, B, C), Q255 (A, B), Q275
b. Low Alloy Structural Steel
c. Structural Steel for Specific Purposes
(2) High-Quality Steel (including high-quality steel)
a. Structural Steel:
a. High-Quality Carbon Structural Steel
b. Alloy Structural Steel
c. Spring Steel
d. Free-Machining Steel
e. Bearing Steel
f. High-Quality Structural Steel for Specific Purposes
b. Tool Steel:
a. Carbon Tool Steel
b. Alloy Tool Steel
c. High-Speed Tool Steel
c. Special Property Steel:
a. Stainless and Acid-Resistant Steel
b. Heat-Resistant Steel
c. Electrothermal Alloy Steel
d. Electrical Steel
e. High Manganese Wear-Resistant Steel

6. Classification by Smelting Method
(1) By Furnace Type
a. Open Hearth Steel:
a. Acidic Open Hearth Steel
b. Alkaline Open Hearth Steel
b. Converter Steel:
a. Acidic Converter Steel
b. Alkaline Converter Steel
c. Electric Furnace Steel:
a. Electric Arc Furnace Steel
b. Electroslag Furnace Steel
c. Induction Furnace Steel
d. Vacuum Consumable Furnace Steel
e. Electron Beam Furnace Steel
(2) By Degree of Deoxidation and Casting Method
Boiling Steel; Semi-Killed Steel; Killed Steel; Special Killed Steel

7. Classification by Shape
(1) Profiles: Heavy rail (over 30 kg/m), light rail (up to 30 kg/m), I-beams, channel sections, angle bars, and rebars
(2) Sheets: Thin sheet (≤4 mm), medium plate (>4–20 mm), thick plate (>20–60 mm), extra thick plate (>60 mm), and steel strip
(3) Pipes: Seamless and welded pipes
(4) Metal Products: Including wire, wire rope, and steel strands

This article is provided by Hardware Business Network Information Center. For more information, visit http://news.chinawj.com.cn.

600*1200 All Ceramic Glazed Tile

Bathroom anti slip floor tiles,Ceramic tiles on the interior walls of the bathroom,floor tile that looks like marble

Xuzhou Lange New Materials Co., Ltd. , https://www.successleo.com