First of all, seamless steel tubes are made of welded seam-free, generally can withstand a certain amount of pressure, didn’t make clear requirements for the roughness of the skin can be cold and rough-cast product. Precision steel tubes seamless compared product is a relatively new...

Production process of precision-drawn seamless tubes Precision-drawn seamless steel pipe production technology in General can be classified as cold-drawn and hot rolled two cold-rolled precision-drawn seamless steel pipe production process are generally more complicated than hot-rolled, it tube in a priority three-roll continuous rolling, extrusion...

(A) the quality requirements ① steel chemical composition: the chemical composition of steel is one of the most important factors affecting the seamless performance, and rolling process parameters and main basis for steel pipe heat treatment process parameters. A … of alloying elements: interested in...

Precision steel tubes are the basis and impetus of modernization. Precision steel pipe supply and security is related to China’s modernization drive. Since entering the new century, development precision steel tubes in China made remarkable achievements, steady growth in supply capacity, precision steel structure continues...

Seamless steel pipe, seamless precision steel tubes-hardness testing Seamless steel pipes commonly used for Brinell, Rockwell, Vickers hardness of three indicators to measure its hardness. 1, Brinell hardness Seamless steel tube standard, Brinell hardness the most widely used, often indicated by indentation diameter to the...

Precision steel pipe factory the real problem is the high production cost of exit speed, as fast as new supply coming onto the market. Vale, the world’s largest iron ore producer, and the other two giants-Rio Tinto and BHP Billiton has been increasing rapidly. Now...