Steel Q345R (HIC) and Q345R (R-HIC) refers to steel grade Q345R. The corrosion test is performed by hydrogen induced cracking inspection (HIC) and sulfide stress corrosion (SSCC) inspection.
345R steel plate is a special plate for pressure vessels with a yield strength of 345MPa. It has good comprehensive mechanical properties and process properties. The phosphorus and sulfur content is slightly lower than that of the low-alloy high-strength steel Q345 (16Mn) steel. In addition to the requirements for tensile strength and elongation to be improved compared to Q345 (16Mn) steel, impact toughness is also required. 345R material is currently the most widely used and most used steel plate for pressure vessels in China.
The surface quality of Q345R (HIC) and Q345R (R-HIC) steel plates, the packaging, marking and quality certificate of steel plates shall meet the requirements of GB713-2008
Q345R (HIC) and Q345R (R-HIC) delivery status: normalizing + tempering
Q345R (HIC) Steel Production
Q345R (HIC) hydrogen-resistant steel production process: electric furnace steelmaking-LF furnace refining-VD furnace vacuum degassing-rolling plate-flaw detection-normalizing-tempering-steel plate finishing-performance inspection, the company formulates appropriate internal control components Strictly control the fluctuation range of chemical composition to ensure the stability of steel plate performance.
Strengthen the ingredients control and smelting operation, effectively control the content of harmful elements such as Sn, Sb, As, Cu, etc. In addition to reducing the P and S content, improve the purity of the steel, reduce the tendency of tempering and embrittlement, and improve the high temperature corrosion resistance of the steel. Controlled heating is used to ensure heating time and temperature. Controlled rolling and other measures are adopted to ensure the inherent quality of the steel plate. Strictly control the rolling and heat treatment process, so that the steel plate has a reasonable structure and grain size, and ensure that the steel plate has good comprehensive properties.
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