| ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ KAWASAKI STEEL TECHNICAL REPORT No.14 ( March 1986 ) Special Issue on Stainless Steels ‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘‘ |
| Manufacturing and Characteristics of 13 Cr
Stainless Steel Tubing Takao Kawate, Tadao Katagiri, Toshikazu Masuda, Isao Takada, Takao Kurisu, Hiroshi Otsubo |
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Synopsis : The 13 Cr stainless steel tubing has been manufactured by rolling in the Mannesmann mandrel mill, upsetting and heat treatment in Chiba Works. The billet has been made by continuous casting and rolling at the billet mill. Sulfur content of the billet is lowered to less than 0.002% to improve hot workability. High piercing efficiency of the billet is required for decreasing defects on the outer and inner surfaces of the tube. The groove design of the mandrel mill roll is improved to prevent sticking between mandrel bar and tube. In order to succeed in upsetting, lubrication between tube and upsetting tools is necessary. The 13 Cr stainless steel tubing manufactured by the processes described above has dimensional accuracy similar to that for carbon steels and has mechanical properties satisfying the specification of API L80 Grade. Besides, the tubing exhibits corrosion resistance to CO2 and brine environment and is useful for oil and gas wells containing CO2 and brine. |
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