Q690D steel plate mechanical properties Q690D implementation standard

Q690D steel plate mechanical properties Q690D implementation standard

Q690D belongs to high-strength welded structural steel. where Q represents the yield strength, 690 represents the yield strength value, and D represents the grade of the steel plate. The quality grades are A, B, C, D, E. The impact test temperature of Class D steel plate is -20°C. Q690D can be called a low-temperature resistant high-strength steel with a yield strength of 690Mpa. Q690D steel plate has high yield strength and tensile strength, and is widely used in coal mining machinery, construction machinery, such as hydraulic supports, harbor cranes, flatbed trucks.
 

Chemical composition

Tabulation: Depu Steel Date: 2024-01-18

C	Si	Mn	P	S	Nb	V	Ti	Cr	Ni	Cu
≤0.18	≤0.60	≤2.00	≤0.025	≤0.020	≤0.11	≤0.12	≤0.20	≤1.00	≤0.80	≤0.80

Note:
(1): In order to improve the properties of steel, other trace alloying elements other than those in the above table can be added; This value is only for WSD690D≤80mm; The 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 Q690D mechanical properties reference: tensile strength σb (MPa) Nominal thickness (mm) ≤40 >40 ~ 63 > 63 ~ 80 tensile strength σb (MPa) 770 ~ 940 750 ~ 920 730 ~ 900 Q690D specification 3-180 1800-3000 5000-13000 Yield Strength σs (MPa) Nominal Thickness (mm) ≤16 >16~40 >40~63 >63~80 Yield Strength σs (MPa ≥690 ≥670 ≥660 ≥640