The properties of metal materials mainly include: physical properties, chemical properties, mechanical properties, and process properties.

1. Physical properties: including density, melting point, thermal conductivity, electrical conductivity, magnetic properties, thermal expansion properties, etc. Density 304---7.93, 316L---8.00, 2520---7.98, 0Cr13---7.75

Second, chemical properties: including corrosion resistance, heat resistance, etc., stainless steel uses corrosion resistance, high temperature alloys use heat resistance and so on.

3. Mechanical properties: The mechanical properties of metals refer to the ability of metal materials to resist various external loads. These include: strength, hardness, plasticity, toughness, etc., which are extremely important indicators for measuring material properties.

1. Strength: The ability of a material to resist deformation and fracture under the action of external force (load).

2. Yield point (бs): called yield strength, refers to the stress value at which the load does not increase and the deformation continues to increase when the stress on the material reaches a certain critical value during the stretching process of the material. (The unit area of the material is called stress).

3. Tensile strength (бb): also known as strength limit, refers to the maximum stress value that a material can withstand before breaking.

4. Elongation (δ): The percentage of the total elongation of the material to the original gauge length after tensile fracture. In engineering, materials with δ≥5% are often called plastic materials; materials with δ≤5% are called brittle materials.

5. Section shrinkage rate (Ψ): After the material is stretched and fractured, the maximum reduction area of the section is the percentage of the original section area.

6. Hardness: refers to the ability of a material to resist the pressure of other harder objects on its surface. Commonly used hardness is measured according to its range of distribution hardness (HBS, HBW) and Rockwell hardness (HRC, HRB, HRA).

7. Impact toughness (Ak): The ability of a material to resist impact loads.

4. Process performance: Process performance refers to the difficulty of processing into parts of a certain shape. Such as forging properties, stamping properties, machining properties, casting properties, weldability, heat treatment properties, etc., which can be subdivided, such as casting properties including fluidity, shrinkage, etc., heat treatment properties including hardenability, hardenability , oxidative decarburization, etc.