1, Pressure vessel steel PLATE:
With uppercase R at the end of the grade, its grade can be used to yield points can also be expressed by carbon content or alloy elements. For example: Q345R,Q345 is the yield point.Such as: 20R, 16MnR, 15MnVR, 15MnVNR, 8MnMoNbR, MnNiMoNbR, 15CrMoR and so on are expressed by carbon content or alloy elements.
2, Welded cylinder steel plate:
With uppercase HP at the end of the grade, its grades can be expressed with yield points, such as: Q295HP, Q345HP, but also can be used to include alloy elements to indicate such as: 16MnREHP.
3, Boiler steel plate:
With lowercase g in the grade tail representation.Its grades can be expressed as yield points, such as: Q390g, can also be expressed in carbon content or alloy elements, such as 20g, 22Mng, 15CrMog, 16Mng, 19Mng, 13MnNiCrMoNbg, 12Cr1MoVg and so on.
4, bridge steel Plate:
With lowercase q in the grade tail representation, such as Q420q, 16Mnq, 14MnNbq and so on.
5, automotive girder steel plate:
With uppercase L in the grade tail representation, such as 09MnREL, 06TiL, 08TiL, 10TiL, 09SiVL, 16MnL, 16MnREL and so on.