Q345D Low Alloy Steel Pipe Quality Inspection
①Hardness test: Brinell hardness HB, Rockwell hardness HRC, Vickers hardness HV, etc.
Note: The elongation of the sample after breaking is related to the size of the sample GB/T 1760
②Impact test: CVN, notched C-type, V-type, work J value J/cm2
Standard sample 10×10×55 (mm) Non-standard sample 5×10×55 (mm)
③ Tensile test: measure stress and deformation, and determine the strength (YS, TS) and plasticity index (A, Z) of the material. Longitudinal and transverse sample pipe sections, arc-shaped and circular samples (￠10, ￠12.5) diameter, Thin wall with large diameter and thick wall with fixed gauge length.
④Hydraulic test: test pressure, pressure stabilization time, p=2Sδ/D
