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GB/T 1591-2018 Q345B / GB/T 1591 Q345B Steel - Specifications & Listings

GB/T 1591-2018 Q345B: Low alloy high strength structural steel with good toughness, weldability and mechanical performance. Widely used in bridges, heavy structures and engineering machinery.

Forms: Plate Category: Mild Steel
Grade Details
GradeGB/T 1591-2018 Q345B / GB/T 1591 Q345B
StandardGB/T 1591-2018
DescriptionLow alloy high strength structural steel with good toughness, weldability and mechanical performance. Widely used in bridges, heavy structures and engineering machinery.
Applicationsbridges, construction equipment, cranes, heavy structures, pressure vessels, machinery
Equivalent / Similar Grades
Grade Standard Region Live on M-EX
S355JR EN 10025 Europe 3 listings, 0 RFQs →
SM490A JIS G3106 Japan 2 listings, 0 RFQs →
09G2S GOST Russia 2 listings, 0 RFQs →
Supply & Demand by FormSee Full Supply & Demand →
Plate →
Balanced
Chemical Composition (%)
C Si Mn S P V Nb Ti
<=0.20 <=0.50 1.00-1.60 <=0.035 <=0.035 <=0.20 <=0.07 <=0.20
Mechanical Properties
tensile_strength 470-630 MPa
yield_strength >=345 MPa
elongation >=21%
impact_energy >=34 J
Typical Available Sizes
Round Bar 16-300 mm dia
Flat Bar 25-600 mm width
Sizes are indicative. Contact seller for exact availability.
Processing:

Active GB/T 1591-2018 Q345B / GB/T 1591 Q345B Listings on M-EX (For Sale)

GB/T 1591-2018 Q345B / GB/T 1591 Q345B Plate
7.000 MT
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GB/T 1591-2018 Q345B / GB/T 1591 Q345B Plate
8.600 MT
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