Mild steel pipe (MS pipe), the carbon content from 0.10 to 0.30% low carbon steel easy to accept all kinds of processing such as forging, welding and cutting, commonly used in the manufacture of chains, rivets, bolts, shafts, etc. Carbon content less than 0.25% of carbon steel, because of its low strength, low hardness and soft, so called soft steel. It includes most of the part of ordinary carbon steel and high quality carbon structural steel, mostly without heat treatment for engineering structures, some carburizing heat treatment used to require abrasion and other mechanical parts. Usually rolled into a low-carbon steel angles, channels, beams, steel pipes, steel or steel, used to make various building components, containers, tank, furnace and other farm machinery. High quality low carbon steel rolled into sheets, production automobile cab, engine hood and other deep drawn products; also rolled into bars, used to produce strength less demanding mechanical parts. Before use generally mild steel without heat treatment, the carbon content of 0.15% or more by carburizing or cyanide treatment, for applications requiring high surface temperature, wear good shafts, bushings, sprockets and other parts. As low strength low carbon steel, use is restricted. Appropriate increase in carbon manganese content, and add trace vanadium, titanium, niobium and other alloying elements, can greatly improve the strength of steel. If the lower carbon content and adding a small amount of aluminum, boron, and a small amount of carbide forming elements, you can get ultra-low carbon bainite its strength is high enough, and keep the good ductility and toughness.
Cast steel pipe is pipe with casting. Cast steel pipe is for water supply, drainage and gas pipelines, which includes cast straight pipe and fittings. Labor intensity.
By casting methods, it is divided into continuous cast steel pipe and centrifugal cast steel pipe, cast steel pipe which is divided into centrifugal sand and metal type. Material divided into gray cast steel pipe and ductile steel pipe. Different forms at the interface is divided into flexible interface, flange interface, self-anchored interfaces, rigid interface. Among them, flexible cast steel pipe rubber ring seal; cast steel pipe flange mounting flange interface, padded rubber flange gasket; rigid cast steel pipe socket interface is generally larger, straight tube inserted, sealed with cement, this process is now basically eliminated.
First, different materials, cast steel pipe is made of ductile iron, mild steel pipe is made of structural steel, the main ingredient is low carbon.
Second, different manufacturing process, cast steel pipe is generally sand casting; mild steel pipe is used through the mill rolled billet molding or submerged arc welding, resistance welding together.
Third, different performance, cast steel pipe generally large diameter, tube wall thickness, crisp texture, relatively heavy, which can be made of carbon steel of very small diameter, thin wall, good toughness, light. Uses are different.
Fourth, different usage life, cast steel pipe is a high-speed centrifuge cast iron pipe, it is resistant to stress corrosion life of 70 years or more, usually do the city's underground water gas pipelines. Mild steel pipe is welded steel coil, it's a simple process, but the life expectancy of 20-30 years or so, the price is quite and milling of cast steel pipes.