High-strength welded structural steel Q690D plate

Q690D plate 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 steel plate. The quality grades are A, B, C, D and E. The impact of Grade D steel plate is - 20℃. Q690D steel can be called low temperature high strength steel with yield strength of 690Mpa.

Q690D steel plate delivery status: quenched and tempered.

Q690D steel plate executive standards: GB/T1591-2008, GB/T16270-2009.

Chemical composition of Q690D steel plate:
C:≤0.18，Si:≤0.60，Mn:≤2.0，P:≤0.030，S:≤0.025，Ni:≤0.80，Cr:≤1.00，Mo:≤0.11，Nb:≤0.11，Ti:≤0.020，B:≤0.004，Al:≥0.015

Mechanical properties of Q690D steel plate:
Yield strength (MPa): ≥ 640Mpa
Tensile strength (MPa): ≥ 730Mpa
Elongation A%: ≥ 14
Impact energy AKV (J) - 20:47
180°cold bending test: d=3a

Q690D steel plate has high yield strength and tensile strength, and is widely used in coal mining machinery, engineering machinery, such as hydraulic support, port crane, and flat transporter.