Steel applied to dimethyl ether storage pressure vessel

Abstract

The invention discloses steel applied to a dimethyl ether storage pressure vessel. The chemical compositions of the steel comprise, by weight, 0.06 to 0.08% of C, 0.10 to 0.20% of Si, 0.95 to 1.15% of Mn, 0.05 to 0.07% of Ti, 0.07 to 0.09% of Nb, 1.30 to 1.40% of Cr, 0.50 to 0.70% of Ni, 0.70 to 0.90% of Mo, 0.05 to 0.15% of V, no more than 0.015% of P, no more than 0.010% of S, 0.015 to 0.025% of Als, 0.30 to 0.50% of Cu, and the balance of Fe and inevitable impurities.

Description

technical field [0001] The invention relates to the technical field of iron and steel metallurgy, in particular to a steel for dimethyl ether storage pressure vessels. Background technique [0002] Domestic production, storage and transportation of dimethyl ether basically use Q345R steel for the manufacture of storage tanks, because the strength of this kind of steel is low, and the wall thickness of the manufactured container is relatively thick, which is inconvenient to use. Although Q370R steel can be used as a substitute, there is no H in the medium of dimethyl ether production, storage and transportation. 2 The existence of S eliminates the restriction on the strength of the material, so steel grades with higher strength than Q370R can be used for equipment upgrades. 10000m 3 The above production and storage devices for dimethyl ether and other large pressure vessels require a high-strength pressure vessel steel with a tensile strength of 570MPa to further increase t...

AI Technical Summary

Problems solved by technology

But the C content in this patented steel is too high, and the welding performance is not good

Not suitable for use in DME storage containers