Specification for low carbon 17/12 chromium-nickel-molybdenum corrosion-resisting steel tube (500 N/mm Steels, Chromium steels, Nickel steels, Molybdenum steels, Stainless steels, Corrosion-resistant steels, Low-carbon steels, Pipes, Chemical composition, Heat treatment, Mechanical properties of materials, Microscopic analysis, Air transport engineering