| 摘要 |
Title of the Invention Method for producing clad steel pipes A long length clad steel pipe which is in the extremely superior metallurgically bonded state and having good qualities can be manufactured easily in an inexpensive cost by using as a base metal, a carbon steel including a low alloyed steel and as a cladding metal, a stainless steel, nickel or a nickel alloy and by the steps comprising welding at least one end part of double pipes consisting of a base metal and a cladding metal, and subjecting the processed double pipes to hot rolling at a temperature between 850.degree.C to 1300.degree.C with a reduction ratio of at least 15% in the first step rolling. |
