Bright Surface Finish Cold Drawn 304 321 316L 310S Stainless Steel Flat Bar

Steel is an iron-carbon alloy with carbon content between 0.04% and 2.3%. In order to ensure its toughness and plasticity, the carbon content is generally not more than 1.7%. In addition to iron and carbon, the main elements of steel are silicon, manganese, sulfur and phosphorus. There are a variety of steel classification methods, the main methods are as follows:

1. Classification by quality

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

(2) High quality steel (P, S ≤0.035%)

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

2. Classification according to 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 alloying element content ≤5%); Medium alloy steel (total alloying element content > 5-10%); High alloy steel (total alloying element content > 10%).

3, according to forming method classification:

(1) forging steel

(2) cast steel

(3) the hot rolled steel

(4) Cold drawn steel.

4. Classification according to metallographic organization

(1) annealing state: hypoeutectoid steel (ferrite + pearlite); Eutectoid steel (pearlite); Eutectoid steel (pearlite + cementite); Lastenitic steel (pearlite + cementite).

(2) normalizing: pearlite steel; Bainitic steel; Martensitic steel; Austenitic steel.

(3) having no or partial phase transition

5. Classification by use

(1) Construction and engineering steel: common carbon structural steel; Low alloy structural steel; Reinforced steel.

(2) structural steel

A. Mechanical steel: tempered and tempered structural steel; Surface hardening structural steel: including carbon steel, ammonia steel, surface hardening steel; Shear structural steel; Steel for cold plastic forming: including steel for cold stamping and steel for cold heading.

B. spring steel

C. bearing steel

(3) tool steel: carbon tool steel; Alloy tool steel; High speed tool steel.

(4) Special performance steel: stainless acid resistant steel; Heat resistant steel: including oxidation resistant steel, heat strength steel, valve steel; Electrothermal alloy steel; Wear resistant steel; Low temperature steel; Electrical steel.

(5) Professional steel: such as bridge steel, ship steel, boiler steel, pressure vessel steel, agricultural machinery steel, etc.

6. 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. Ordinary structural steels for specific purposes

(2) High quality steel (including high quality steel)

A. Structural steel: high quality carbon structural steel; Alloy structural steel; Spring steel. Free cutting steel. Bearing steel. High quality structural steel for specific purposes.

B. Tool steel: carbon tool steel; Alloy tool steel; High speed tool steel.

C. Special performance steel: stainless acid resistant steel; Heat resistant steel; Electrothermal alloy steel; Electrical steel; High manganese wear resistant steel.

7. Classification by smelting method

(1) according to furnace type

A. Open hearth steel: acid open hearth steel; Basic open hearth steel.

B. Bessemer steel: acid Bessemer steel; Basic Bessemer steel. Or bottom blown Bessemer steel; Side blown bof steel; Bof steel.

C. Electric furnace steel: arc furnace steel; Electroslag furnace steel; Induction furnace steel; Vacuum consumable furnace steel; Electron beam furnace steel.

Jiangsu Irunt Steel Group Co., Ltd. is located in Wuxi City , Jiangsu Province, China, which is the largest steel production base. After 30 years of efforts, it has grown from a family factory to a group company.

The group company mainly produces and sells a series of steel products such as steel pipe, steel coil, steel plate, copper pipe, copper plate, copper strip, aluminum pipe, aluminum plate, galvanized steel pipe, galvanized coil, galvanized plate and so on.The group company has established five platforms, including three production plants and two processing plants. At present, it is still expanding its production line, basically forming a development model of integration of production, processing and sales.

Our annual production capacity of various specifications is about 1 million metric tons. In addition to being a supplier of our series of products, the group company is also committed to expanding its commitment to customers by strengthening services and adding new facilities. A dedicated team is responsible for providing technical support, recommending the correct use of steel, and assisting customers to give full play to their products.

Over the years, we have opened up new markets in Africa, Southeast Asia, the Middle East and America. Our best service and excellent quality have led long-term partners in many countries and established continuous business relations with all customers. Our principle is "service first, sales second". Most of the time, we have comprehensive inspection and procurement to control the quality of finished products. We will have a professional inspection team to test each delivery of products.

Since its establishment, in line with the mission of "contributing high-quality products and services to the world" and the core values of "customer first, excellence, coexistence and win-win", we ensure that we can deeply cooperate with all our friends in the field of iron and steel, and win more affirmation and praise from the market and customers with its high-quality products, perfect product team and thoughtful service, I believe tomorrow will be better!