Main raw material introduction

1. Main iron and steel material characteristics and application fields

①Carbon steel

Carbon steel is an iron and ferric carbon alloy material containing carbon elements, usually containing between 0.12% and 2.0%. According to the different carbon content, carbon steel is divided into low carbon steel (carbon content is less than 0.3%), medium carbon steel (carbon content is 0.3% -0.6%) and high carbon steel (carbon content is more than 0.6%). Carbon steel has good plasticity, weldability and machinability, is widely used in structural parts, mechanical parts, automobile manufacturing and other fields.

②Alloy steel

Alloy steel is a steel product with other alloy elements (such as chromium, nickel, molybdenum, etc.) added on the basis of carbon steel to improve its mechanical properties, heat resistance and corrosion resistance. Alloy steel can be divided into various types according to the addition proportion and performance requirements of different alloy elements. For example, chromium-molybdenum steel is commonly used in automotive manufacturing and aviation industry, and manganese steel is used in the manufacture of wear-resistant parts.

③Stainless steel

Stainless steel is a corrosion-resistant steel, the main components are chromium (usually between 10% and 30% content) and nickel. Stainless steel is divided into austenite stainless steel, ferrite stainless steel and martensite stainless steel. Austenitic stainless steel has good corrosion resistance and processing, is widely used in kitchenware, building decoration, chemical equipment and other fields.

④Mold steel

Die steel is a special steel used in the manufacture of molds, with high hardness, high strength, wear resistance and impact resistance. According to the use requirements and process characteristics, the industrial mold steel can be divided into cold mold steel, hot mold steel, plastic die steel and other types. They are widely used in plastic molds, die-casting molds and other fields.

⑤Steel pipe

Steel pipe is a kind of hollow steel pipe, which can be divided into seamless steel pipe and welded steel pipe according to the manufacturing process. Steel pipe is widely used in petroleum, chemical industry, machinery manufacturing, construction and other fields, with the characteristics of strong bearing capacity, good pressure resistance and corrosion resistance. Seamless steel pipe is suitable for high pressure and high temperature environment, while welded steel pipe is suitable for general engineering and structure.

2. Heat treatment and surface treatment

The properties of steel materials can be improved by heat treatment and surface treatment. Heat treatment includes annealing, normal ignition, quenching and other processes, which can adjust the organizational structure of steel and improve its hardness and strength. Surface treatment includes galvanizing, spraying, coating and other methods, which can improve the corrosion resistance and aesthetics of steel.

3. quality standard

Quality standards of steel materials are essential to ensure product quality. Common steel material specifications include international standards (e. g. ASTM, ISO), European standards (e. g. EN), and national standards (e. g. GB, JIS). Select qualified steel can guarantee its performance and reliability.