1. Plasticity refers to the ability of metal materials to undergo plastic deformation (permanent deformation) under load without failure.
2. Hardness is a pointer to measure the softness and hardness of metal materials. The most commonly used method for measuring hardness in this production is the indentation hardness method, which uses a geometric shaped indenter to press into the surface of the tested metal material under a certain load, and determines its hardness value based on the degree of pressing. The commonly used methods include Brinell hardness (HB), Rockwell hardness (HRA, HRB, HRC), and Vickers hardness (HV).
3.Fatigue strength, plasticity, and hardness are all indicators of the mechanical properties of metals under static loads. In fact, many machine parts work under cyclic loads, and under these conditions, the parts will experience fatigue. The road also requires special-shaped steel pipes with other cross-sectional shapes.
Welded steel pipes for low-pressure fluid transportation (GB/T3092-1993) are also known as general welded pipes and commonly referred to as black pipes. It is a welded steel pipe used for transporting generally low-pressure fluids such as water, gas, air, oil, and heating steam, as well as for other purposes. The wall thickness of steel pipes is divided into ordinary steel pipes and thickened steel pipes; The form of the connecting end is divided into non threaded steel pipe (plain pipe) and threaded steel pipe. The specifications of steel pipes are expressed in nominal diameter (mm), which is an approximate value of the inner diameter. It is commonly expressed in inches, such as 11/2. Welded steel pipes for low-pressure fluid transportation are not only directly used for transporting fluids, but also widely used as raw pipes for galvanized welded steel pipes for low-pressure fluid transportation.
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