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The Q345R steel plate properties and yield strength

Q345R steel plate is a special plate for pressure vessels with a yield strength of 345MPa. Q345R steel plate has good comprehensive mechanical properties and process properties. The phosphorus and sulfur content of Q345R steel plate is lower than that of low-alloy high-strength steel plate.

Q345R steel plate, in addition to higher tensile strength and elongation requirements than Q345 (16Mn) steel, but also requires zero-degree impact toughness. It is currently the most widely used and most used pressure vessel special steel plate in China.

According to the new classification of GB 713-2008 "Steel Plates for Boilers and Pressure Vessels" implemented on September 1, 2008, 16Mng, 16MnR, and 19Mng were merged into Q345R.

Q345R steel plate is an ordinary low-alloy steel, which is commonly used for boiler and pressure vessels. The delivery status is divided into: hot-rolled or normalized, and it is a low-alloy steel.

The performance of Q345R steel plate is similar to that of Q345 (16Mn) (the yield strength of 16mm steel plate is greater than 345Mpa). The tensile strength of Q345R steel plate is between (510-640), the elongation is greater than 21%, and the zero-degree V-shaped impact energy is greater than 34J.