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Q345B steel round bar, Q345B steel round bar supplier
Q345B steel is a Chinese standardized low alloy, medium tensile strength steel made with a hot-rolling process, and is used for a number of manufacturing purposes. It is a steel with less than 0.2 percent of its composition made up of carbon, less than 0.55 percent of its composition made of silicon and several impurities (mostly sulfur, chromium and nickel). This particular grade of steel is a 'general purpose' manufacturing steel, used for sheet metal, light structural elements of household goods, and similar uses where it won't be used as a major structural component.
Q345B steel round bar specification:
Standard: GB, JIS, DIN, ASTM, ASME, ISO.
Dimension: 20mm-350mm.
Length: Random length as your request.
Q345B steel surface: Black surface/Turned/Ground.
Q345B steel test : Ultrasonic test according to SEP1921-84C/C.
Q345B steel process: EAF+ LF+ VD+ Forged+ Heat Treatment( Annealed, Normalized, Q+T).
Q345B steel chemical composition (%):
|
C |
Mn |
Si |
P |
S |
V |
Nb |
Ti |
|
≤0.20 |
1.00-1.60 |
≤0.55 |
≤0.040 |
≤0.040 |
0.02-0.15 |
0.015-0.060 |
0.02-0.20 |
Q345B steel mechanical properties:
|
Grade |
thickness |
test temperature(°c) |
Elongation(%) |
proof stress (Mpa) |
Tensile strength (Mpa) |
|
Q345B |
≤16 |
20 |
21 |
345 |
470-630 |
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