Q460qD introduction of steel plates for bridges

Q460qD introduction of steel plates for bridges

The impact temperature of Q460qD bridge steel is -20C°, where Q represents the first letter of the Chinese pinyin of the word "yield" of the yield strength of bridge steel; 460 represents the yield strength value, in MPa; q represents the first letter of the Chinese pinyin character "bridge" used in steel for bridges; D stands for D grade of the quality grade.
Q460qD steel plate implementation technical standard: GB/T 714-2008 Q460qD steel plate heat treatment process:
Q+T (quenching + tempering), quenching and tempering

 

Chemical composition

Tabulation: Depu Steel Date: 2024-01-18

trademark	C	Si	Mn	P	S	Ni	Cr	Mo
Q460qD	≤0.18	≤0.55	1-1.8	≤0.025	≤0.015	≤0.7	≤0.8	≤0.35

Note:
(1): In order to improve the performance, one or more alloys in Nb, V and Ti can be added as needed, if two or more are mixed and added, the total amount ≤0.12 data comes from the network and is for reference only.
(2): The allowable deviation of the chemical composition of the finished steel plate shall comply with the provisions of
GB/T222 (3): Ceq = C + Mn/6 + (Cr + Mo + V) / 5 + (Ni + Cu) / 15 Pcm = C + Si / 30 + (Mn + Cu + Cr) / 20 + Ni / 60 + Mo / 15 + V / 10 + 5B