Chemical properties and process properties of metallic materials

　　(1) Chemical properties

　　Refers to the chemical or electrochemical reaction of the shaped tube metal material against the surrounding medium, including:

　　1. Corrosion resistance: refers to the ability of metal materials to resist various media erosion;

　　2. Antioxidant: refers to the ability of the shaped tube material to resist the generation of scale at high temperatures.

　　(2) process performance

　　Refers to those properties of materials that withstand a variety of processing and processing capabilities, including:

　　1. Casting performance: Refers to whether the metal or alloy is suitable for casting. It mainly includes flow properties, full moldability; shrinkage, ability to shrink volume when the casting solidifies; segregation refers to chemical composition unevenness.

　　2. Welding performance: refers to the welding of two or more kinds of metal materials by heating or heating and pressure welding methods, and the interface can meet the purpose of use.

　　3. Top gas segment performance: refers to the ability of metal materials to support forging without breaking.

　　4. Cold bending performance: It means that the metal material can withstand bending without breaking performance at normal temperature.

　　5. Stamping performance: The ability of metal materials to withstand stamping deformation without breaking. Pressing at room temperature is called cold stamping. The test method was tested by cupping test.

　　6. Forging performance: The ability of the shaped pipe material to withstand plastic deformation without breaking in the forging process.

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