its high temperature resistance, low temperature resistance

Chromium-molybdenum alloy chromium-molybdenum alloy pipe tube 15 is a seamless, its performance is much higher than the average of seamless steel tubes, because the steel contains Cr more inside, its high temperature resistance, low tungsten carbide plate resistance, corrosion resistance seamless smaller than the other, so the alloy tube in the petroleum, chemical, electric power, boiler and other industries use more widely. 15 Cr-Mo alloy pipe principle of purified hydrogen at 300-500 ℃, the purification of the hydrogen to be introduced into chrome molybdenum alloy tube 15 side, the hydrogen is adsorbed on the wall 15 chromium-molybdenum alloy, the palladium 4d lack of two electron shells, which can generate instability in the hydrogen bond (palladium and hydrogen this reaction is reversible), the role of the palladium, hydrogen is ionized proton radius of 1.5 × 1015m, while palladium the lattice constant of 3.88 × 10-10m (20 ℃), the so by 15 Cr-Mo alloy pipe, under the action of the palladium and proton and electron binding and re-form hydrogen molecules from the 15 Cr-Mo alloy tube to another side to escape. In the 15 chromium-molybdenum alloy tube surface, not dissociated gas is impermeable, it can take advantage of 15 chromium-molybdenum alloy tube to obtain high purity hydrogen. Although palladium to hydrogen permeability has a unique, 15 Cr-Mo alloy pipe pure palladium but poor mechanical properties, high temperature oxidation, the recrystallization temperature is low, easy to make the 15 Cr-Mo alloy pipe] deformation and brittle, and therefore can not be used pure palladium as through the membrane. Add the proper amount of palladium and Ⅷ Group IB elements, made ??of palladium alloy, palladium can improve the mechanical properties of 11 automobile axle casing seamless pipe (GB3088-82) is manufactured automobile axle casing and the drive axle axle shaft tubes of high-quality carbon structural steel and alloy steel seamless hot-rolled palladium alloys, silver accounting for 20-30%, other ingredients (such as gold, etc.) content of <5%