钢板材质 求助

开花的树

钢板号为 S355J2G3, 查了，对G3的解释为
“fully killed with nitrogen binding element”，请问，这是什么镇静钢？

开花的树

这是欧盟标准钢号，附上问题的来源

EN10025钢号的含义例如JR, J0, J2, S235J2G3, J2G4, JRG1,JRG22008-07-04 16:32The symbol J & K:
JR - Absorbed impact energy min. 27 Joule at 20 °C
J0 - Absorbed impact energy min. 27 Joule at 0 °C
J2 - Absorbed impact energy min. 27 Joule at -20 °C
K2 - Absorbed impact energy min. 27 Joule at –30 °C or 40 Joule at –20 °C

The symbol G:
G                            Deoxidation                                 Delivery condition
G1                           Rimming steel                              At manufacture's discretion
G2                          Rimming steel not permitted         At manufacture's discretion
G3                          Fully killed with nitrogen              Normalized or normalized rolled
                               binding element
G4                          Fully killed with nitrogen              At manufacture's discretion
                                binding element

Example: S235J2G3 - Absorbed impact energy min. 27 Joule at -20 °C, fully killed with nitrogen binding element and normalized or normalized rolled.

Comments: For this G symbol, it is according to EN10025-1990 + A1:1993. Currently the latest EN10025-1~6 is 2004. In this latest version, there is no symbol "G". But in EN10025-2 you can find the corresponding former designations.