304 stainless steel is a common material in stainless steel with a density of 7.93 g/cm³. 304 stainless steel contains more than 18% chromium and more than 8% nickel; high temperature resistance of 800 ℃, with good processing performance, high toughness, widely used in industry and furniture decoration industry and food and medical industry. However, it should be noted that food-grade 304 stainless steel has stricter content indicators than ordinary 304 stainless steel. For example: the international definition of 304 stainless steel is basically 18%-20% of chromium and 8%-10% of nickel, but food-grade 304 stainless steel is 18% of chromium and 8% of nickel, which is allowed to fluctuate within a certain range, and Limit the content of various heavy metals. In other words, 304 stainless steel is not necessarily food grade 304 stainless steel.

Ingredient content required by various standards

1、ASTM A276（Standard Specification for Stainless Steel Bars and profiles）

2、ASTM A240（Chromium and Chromium-Nickel Stainless Steel Plate,Sheet, and Strip for Pressure essels and for General Applications）

3、JIS G4305（cold-rolled ,stainless steel plate,, sheet, and strip）

4、JIS G4303 （Stainless steel bars）

Tensile strength σb (MPa)≥515-1035

Conditional yield strength σ0.2 (MPa)≥205

Elongation δ5 (%)≥40

Area shrinkage ψ (%)≥ -

Hardness: ≤201HBW;≤92HRB;≤210HV

Density (20℃, g/cm³): 7.93

Melting point (℃): 1398~1454

Specific heat capacity (0~100℃, KJ kg-1K-1): 0.50

Thermal conductivity (W·m-1·K-1): (100℃) 16.3, (500℃) 21.5

Linear expansion coefficient (10-6·K-1): (0~100℃) 17.2, (0~500℃) 18.4

Resistivity (20℃, 10-6Ω·m2/m): 0.73

Longitudinal elastic modulus (20℃, KN/mm2): 193

1. 304 stainless steel can be used in food production equipment. With the improvement of the quality of life, the tableware we use must be made of food-grade materials. 304 stainless steel is the right material for processing these tableware.

2. It can also be used for auto parts. Now there are more and more cars. The windshield wipers, mufflers and molded products on the car can be made of 304 stainless steel.

3. It is suitable for medical equipment. In the hospital, everyone can see that the tool cabinets for placing medicines can be made of 304 stainless steel.

4. Roofs and side walls of industrial buildings. In these applications, the owner's construction cost may be more important than aesthetics, and the surface is not very clean. 304 stainless steel works reasonably well in dry indoor environments.

304 stainless steel is not only suitable for the above industries, but also widely used in chemical, agricultural, ship parts, etc.

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