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GB/T1591 Q345B High Strength Structural Steel Plate

Q345B steel is the most common used as high strength low alloy structural steel in industry area.  The equivalent steel grade with Q345B are EN 10025-2 S355JR, ASTM A572 Grade 50 and DIN 17100 St52-3.

Q345B steel Chemical Composition:

Main chemical elements composition of Q345B

C

Si

Mn

P

S

V

Nb

Ti

0.20

0.55

1.00-1.60

0.040

0.040

0.02-0.15

0.015-0.060

0.02-0.20

Q345B steel Mechanical Property:

Thickness (mm)

Q345B

≤ 16

> 16 ≤ 35

> 35 ≤ 50

>50

Yield strength (≥Mpa)

345

325

295

275

Tensile strength (Mpa)

470-630

Main Application:
GB/T1591 Q345B Steel Plate are used in Construction of Bridges, Highway Construction and Other Engineering construction.