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Causes of common defects in ASTM A106 seamless pipe processing

2021-12-09 09:25:43

During smelting or hot processing of ASTM A106 seamless pipe, due to the influence of some factors (such as non-metallic inclusions, gas, process selection or improper operation, etc.), defects will occur on the inside or surface of steel, which will seriously affect the product quality, and even lead to product scrapping in serious cases.

The common defects of ASTM A106 seamless pipe are: bubbles, shrinkage residue, non-metallic inclusions, segregation, white spots, cracks, various abnormal fractures, etc. for these cases, we can detect them by macro inspection.

Causes of pores in ASTM A106 seamless pipe
During hot working, ASTM A106 seamless pipe cannot be welded due to the gap caused by solidification shrinkage of low melting point materials and gas release. According to the basic situation of its distribution, it can be divided into management center type and general loose type.

Macro features: on the side hot acid leaching surface, the pores of ASTM A106 seamless pipe are irregular polygons and the bottom is narrow pits. This different pit structure usually has more segregation. In serious cases, it will be connected into sponge.

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