Magnetic particle flaw detection is only suitable for detecting surface defects, which means that by laying magnetic powder on the surface of the equipment and using its aggregate shape on the surface defects of the magnetic material equipment to determine the position, size and shape of the defect. This A514 grade C alloy steel plate method has a relatively low cost and is easy for steel production enterprises to adopt in batches. However, for special steel profiles with deeper thickness, whether this method is used to detect hidden defects is yet to be verified.
"Adopt standard specification: ASTM, JIS, EN, DINCategory: Structural Steel, carbon steel plate, A514 grade C alloy steel plate, hot rolled plate Carbon steel plate specification: Thickness: 1mm to 200mm; Width: 1500mm to 3500mm: Length: 3000mm to 27000mmThird Party Inspection: ABS, DNV, BV, GL, CCS, LR, RINA, KR, NK, CE, SGS, IKE, IEI or other quality department.
According to A514 grade C alloy steel plate traders in some regions, the downstream purchasing sentiment is maintained, the inventory resources are relatively small, and the A514 grade C alloy steel plate traders are more willing to strike a deal; in addition, the domestic steel mills have issued guidance prices recently, and the long-term upward range is large, which has a boosting effect on the market. In addition, there are A514 grade C alloy steel plate production line maintenance at the end of the month, so the supply side is tight. Overall, the short-term forecast for A514 grade C alloy steel plate will fluctuate mainly upwards tomorrow.
Hydrogen (H) is the most harmful element in general steel such as A514 grade C alloy steel plate. Hydrogen dissolved in steel will cause hydrogen embrittlement, white spots and other defects. Hydrogen, like oxygen and nitrogen, has very little solubility in solid steel. It dissolves into liquid steel at high temperature, and accumulates in the structure without time to escape when cooling, forming high-pressure micro pores, which greatly reduce the plasticity, toughness and fatigue strength of steel, and even cause cracks and brittle fracture in severe cases. "Hydrogen embrittlement" mainly occurs in martensitic steel, but not very prominent in ferrite steel, and generally increases with hardness and carbon content.
