Basic Information
Application
Mold & Dies, Ship Plate, Boiler Plate, Container Plate, Flange Plate
Special Use
Cutting Tools, Measuring Tools, Cutters in Common Steel, High-strength Steel Plate, Wear Resistant Steel, Silicon Steel
Equal Material
S275JR, Q345B
Transport Package
Standard Export Package
Production Capacity
5000t/Month
Product Description
📦
Packaging Details: Bare in loose or per request
Hot Rolled Steel Plate Q345R / Q345B
What is Q345B?
Q345 is a low-carbon steel material (C < 0.2%) offering excellent overall performance, including good low temperature resistance, cold stamping properties, welding performance, and cutting efficiency. It is widely utilized in bridges, vehicles, ships, construction, and pressure vessels.
The "Q" represents the Yield Point, and "345" refers to the yield value of approximately 345MPa. Note that yield value decreases as material thickness increases.
✔ Standard: GB/T1591-2008
✔ Advantage: Good low temperature performance, cold stamping performance
✔ Higher Grades: Q345C, Q345D, Q345E
Chemical Components of Q345B
| Grade |
C |
Si |
Mn |
S |
P |
V |
Nb |
Ti |
| Q345B |
≤0.20 |
≤0.55 |
≤1.70 |
≤0.040 |
≤0.040 |
0.02-0.15 |
0.015-0.060 |
0.02-0.20 |
Mechanical Properties: Yield Strength
| Grade |
≤16mm |
16-40mm |
40-63mm |
63-80mm |
80-100mm |
100-150mm |
150-200mm |
| Q345B |
≥345 |
≥335 |
≥325 |
≥315 |
≥305 |
≥285 |
≥275 |
Tensile Strength: 450-630 MPa
Impact (20ºC): ≥34
Product Photos
Extensive Steel Range
- Steel Plate & Coil
- Steel Wire & Electrodes
- Galvanized & Galvalume Steel
- PPGI & PPGL
- Silicon Steel (CRNGO & CRGO)
- Tinplate & TFS
- Stainless Steel
- Structural Steel (H-beam, I-beam, Channels)
- Angle Steel & Hollow Sections
- Petroleum Pipe & Casing
- Steel Bar & Rebar
- Rail Steel & Sheet Piles
Frequently Asked Questions
What are the primary characteristics of Q345B steel?
Q345B is a low-carbon steel known for its excellent overall performance, including good low-temperature resistance, cold stamping properties, and superior welding and cutting capabilities.
What industries commonly use P235GH / Q345R plates?
These plates are widely used in the manufacturing of pressure vessels, boilers, ships, bridges, and industrial containers, as well as in the construction and vehicle industries.
How does the thickness affect the yield strength of the steel?
The yield strength of Q345B steel decreases as the thickness increases. For example, it starts at ≥345 MPa for thicknesses ≤16mm and adjusts down to ≥275 MPa for thicknesses between 150-200mm.
What surface treatments are available for these steel plates?
The plates are available with milling surface treatments and can be provided in bare condition or with specific protective coatings per customer requirements.
What is the standard delivery time and packaging?
We offer a rapid delivery time of as little as 1 day for in-stock items. Packaging follows standard export protocols, typically delivered bare in loose bundles or according to specific requests.
Do the products come with quality certification?
Yes, all products are supplied with a Mill Test Certificate (MTC) to ensure compliance with the stated chemical and mechanical properties.
Altimexor Metal
%20Metal%20Products%20Co.%2C%20Ltd._Steel%20Pipe%2CSteel%20Plate&images=https%253A%252F%252Fomo-oss-image.thefastimg.com%252Fportal-saas%252Fpg2025102019471928898%252Fcms%252Fimage%252F048d5311-fbf7-4e5e-8816-c4626d2ac3bf.png_1920xaf.png&summary=){kind=link}