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Q690D steel plate
Q690D steel plate
Q690D steel plate
Q690D steel plate

Q690D steel plate

Q690D High strength welded structural steel plate used for large ships, Bridges, power plant equipment, medium and high pressure boilers, high pressure vessels, locomotive vehicles, hoisting machinery, mining machinery and other large welding structures.
Chemical Composition

Grade

Chemical requirement or element Max %

 

C

Si

Mn

P

S

Cu

Cr

Ni

Mo

B

V

Nb

Ti

Q690D

0.2

0.8

1.7

0.025

0.015

0.5

1.5

2

0.7

0.005

0.12

0.06

0.05

Mechanical Property
Q690 Steel Mechanical Properties
      Q690 Yield Strength (≥N/mm2); Thickness or Dia. d (mm)
Standard Steel Grade Quality d≤16 16<d≤40 40<d≤63 63<d≤80
GB/T 1591 – 2008 Q690 C, D, E 690 670 660 640
GB/T 1591 – 2018 Q690M C, D, E 690 680 670 650
      Q690 Tensile Strength (N/mm2); d (mm) Elongation
Standard Steel Grade Quality d≤40 40<d≤63 63<d≤80 %
GB/T 1591 – 2008 Q690 C, D, E 770-940 750-920 730-900 ≥14
GB/T 1591 – 2018 Q690M C, D, E 770-940 750-920 730-900 ≥14
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