Alloy C-4 is an austenitic nickel-molybdenum-chromium alloy with a low carbon, silicon, and iron content. This alloy has a significantly lower tendency to form precipitation in the temperature range between 650 and 1,040 °C(1,202 - 1,904 °F), improving its resistance to inter-crystalline corrosion. When machined perfectly, no knife line attack occurs in the heat-affected zones of awelding edge. Alloy C-4 is characterized by: Very good resistance in a broad field of corrosive media, in particular under strongly oxidizing conditions. Excellent resistance to pitting, crevice and stress corrosion.
The pipe is a hollow, long section of steel with no joints around it. The thicker the wall thickness of the product, the more economical and practical, and the thinner the wall thickness, the processing cost will rise significantly. The process of the product determines its limited performance, the wall thickness is not uniform, the external brightness of the tube is low, the measurement cost is high, and the internal surface is not easy to remove pockmarks and black spots; Its detection and molding must be handled offline. Therefore, it embodies the advantages of high pressure, high strength and mechanical structure materials.
