Seamless Pipe SUPER-13CR 95KSI Tubing
In recent years, in view of the limitations in the use of ordinary 13Cr, super martensitic 13Cr material has entered the oil casing Market. This kind of alloy is developed from ordinary api5ct 13Cr Steel and added with Ni Mo, Cu and other alloy elements. Compared with ordinary 13Cr stainless steel, this kind of material has the comprehensive characteristics of high strength, low temperature toughness and improved corrosion resistance. In super 13Cr martensitic stainless steel, the mass fraction of C is reduced to about 0.03h to inhibit the precipitation of Cr element in the matrix into Cr carbide '~ °]; Single phase martensite is obtained by adding 5% Ni in mass fraction: at the same time, trace alloying elements (such as Mo, TiNb and V) are added to the steel Mo Yuantai can refine the grain and improve the sulfide stress cracking (SSC) and local corrosion resistance of the material, while the addition of strong carbide forming elements such as TiNb and V is conducive to the formation of dispersed carbide particles and high-density dislocation junctions, pinning the dislocation and reducing the SSC sensitivity of super 13Cr material. The improved super 13Cr martensitic stainless steel is at the high temperature up to 18O, It still has good uniform and local corrosion resistance in corrosive environment, and has certain resistance to h and s stress corrosion cracking
