The mechanical properties of seamless steel pipes
What are the mechanical properties of seamless steel pipes?
The mechanical properties of seamless steel pipes are extremely important indicators to measure material properties.
1. Strength: The ability of the material to resist deformation and fracture under the action of external force (load). The unit area of the material is called the stress under the load.
2. Yield point (бs): It is called the yield strength, which means that when the stress on the material reaches a certain critical value during the stretching process, the load no longer increases and the deformation continues to increase or produce 0.2%L. Hour stress value, the unit is expressed in Newton/mm2 (N/mm2).
3. Tensile strength (бb):It is also called strength limit, which refers to the maximum stress that a material can withstand before it breaks. The unit is expressed in Newton/mm2 (N/mm2). For example, the tensile strength of aluminum-lithium alloy can reach 689.5MPa
4. Elongation (δ): The percentage of total elongation to the original gauge length after the material breaks in tension.
In engineering, materials with δ≥5% are often referred to as plastic materials, such as low-carbon steel, aluminum, copper, etc. under static load at room temperature; materials with δ≤5% are called brittle materials, such as cast iron under static load at room temperature, Glass, ceramics, etc.
5. Reduction of area (Ψ): After the material is stretched and broken, the maximum reduced area of the cross-section is the percentage of the original cross-sectional area.
6. Hardness: refers to the ability of a material to resist other harder objects pressed into its surface. Commonly used hardness is measured according to its range of distribution hardness (HBS, HBW) and Rockwell hardness (HRA, HRB, HRC).
7. Impact toughness (Ak): The ability of the material to resist impact load, in Joule/cm2 (J/cm2).
8. Scalability:
①. Ductility: refers to the deformation capacity of the material structure, member or a certain section of the member from the beginning of yielding to the maximum load-bearing capacity or after the load-bearing capacity has not significantly decreased.
②. Malleability: refers to the property of an object that can be pressed into thin sheets.
9. Fatigue strength: alternating load σ-1<σs
The mechanical properties of seamless steel pipes are extremely important indicators to measure material properties.
1. Strength: The ability of the material to resist deformation and fracture under the action of external force (load). The unit area of the material is called the stress under the load.
2. Yield point (бs): It is called the yield strength, which means that when the stress on the material reaches a certain critical value during the stretching process, the load no longer increases and the deformation continues to increase or produce 0.2%L. Hour stress value, the unit is expressed in Newton/mm2 (N/mm2).
3. Tensile strength (бb):It is also called strength limit, which refers to the maximum stress that a material can withstand before it breaks. The unit is expressed in Newton/mm2 (N/mm2). For example, the tensile strength of aluminum-lithium alloy can reach 689.5MPa
4. Elongation (δ): The percentage of total elongation to the original gauge length after the material breaks in tension.
In engineering, materials with δ≥5% are often referred to as plastic materials, such as low-carbon steel, aluminum, copper, etc. under static load at room temperature; materials with δ≤5% are called brittle materials, such as cast iron under static load at room temperature, Glass, ceramics, etc.
5. Reduction of area (Ψ): After the material is stretched and broken, the maximum reduced area of the cross-section is the percentage of the original cross-sectional area.
6. Hardness: refers to the ability of a material to resist other harder objects pressed into its surface. Commonly used hardness is measured according to its range of distribution hardness (HBS, HBW) and Rockwell hardness (HRA, HRB, HRC).
7. Impact toughness (Ak): The ability of the material to resist impact load, in Joule/cm2 (J/cm2).
8. Scalability:
①. Ductility: refers to the deformation capacity of the material structure, member or a certain section of the member from the beginning of yielding to the maximum load-bearing capacity or after the load-bearing capacity has not significantly decreased.
②. Malleability: refers to the property of an object that can be pressed into thin sheets.
9. Fatigue strength: alternating load σ-1<σs
