What is the meaning of Q370qDNH steel?

Q370qDNH steel plate is mainly used to build railway or highway bridges.

Standard: GB/T 714-2015, this standard applies to Q370qDNH steel plate thickness not greater than 150mm.

Q370qDNH steel plate grade

Q—The Chinese pinyin letter of the word "qu" for the yield strength of steel used in bridges;

370-a specified value of small yield strength, unit MPa;

q-the Chinese phonetic alphabet of the word "bridge" used for bridge steel;

D—The quality level is D level;

N——The Chinese phonetic alphabet of the word "Nei";

H-the Chinese phonetic alphabet of the word "hou";

Delivery status:

Q370qDNH steel plate is delivered in hot rolling, normalizing or thermomechanical rolling state.

For bare steel with atmospheric corrosion resistance, it shall be delivered in any of the above delivery states except for normalizing. When a cooling method faster than the cooling rate in air is used for cooling, tempering should be performed.