1. Impact Toughness of Large-Diameter Galvanized Square Steel Pipes: A load acting on a machine part at a very high speed is called an impact load. The ability of a metal to resist failure under an impact load is called impact toughness.
2. Strength of Large-Diameter Steel Pipes: Strength refers to the property of a metallic material to resist failure (excessive plastic deformation or fracture) under static load. Since loads can be applied in the form of tension, compression, bending, and shear, strength is also divided into tensile strength, compressive strength, bending strength, and shear strength. There are often corresponding relationships between various strengths, but tensile strength is generally used as the more basic strength indicator.
3. Distinction between Seamless and Welded Large-Diameter Steel Pipes: Large-diameter steel pipes are formed by extruding seamless round tubes.
4. Plasticity of Large-Diameter Steel Pipes: Plasticity refers to the ability of a metallic material to undergo plastic deformation (long-term deformation) without breaking under load.
5. Fatigue in Large-Diameter Steel Pipes: The strength, plasticity, and hardness discussed above are mechanical property indicators of metals under static loads. In reality, many machine parts operate under cyclic loads under which fatigue occurs.
6. Hardness in Large-Diameter Steel Pipes: Hardness is an indicator of the softness or hardness of a metallic material. Currently, the commonly used method for measuring hardness in production is the indentation hardness test. This method involves pressing an indenter of appropriate geometry into the surface of the metal material under a suitable load and determining the hardness value based on the degree of indentation.
Post time: Dec-12-2025