What are the performance tests of seamless steel pipe?

After the seamless steel pipe is produced through various production processes, various physical and chemical performance tests are required. Only after various tests can it be used in construction machinery and other industries.

1. Tensile test: measure the stress and deformation, determine the strength and plasticity of the material, longitudinally, transverse sample tube section, arc type, round sample small diameter, thin wall large diameter, thick wall fixed calibration distance, the sample stretches after breaking The length rate is related to the sample size.

2. Impact test: CVN, notched C type, V type, work J value J/cm2. Standard sample 10×10×55 Non-standard sample 5×10×55.

3. Hardness test: Brinell hardness HB, Rockwell hardness HRC, Vickers hardness HV, etc.

4. Hydraulic test: test pressure, voltage stabilization time, p=2Sδ/D.