Material Q345 Steel Pipe Suppliers and Manufacturer
Looking for reliable Q345 Steel Pipe suppliers with competitive factory prices?
Huaxiao Metal As one of the leading Q345 steel pipe suppliers in China, the products we offer are known for their superior strength, excellent weldability, and outstanding corrosion resistance. Whether you are in the construction, automotive, energy, or manufacturing industries, our Q345 steel pipes offer unmatched performance and durability, ensuring your projects will stand the test of time.
With competitive Q345 steel pipe prices, we offer the best value without compromising on quality. You will not be disappointed when you purchase our Q345 carbon steel pipes!
Material Q345 Steel Pipe Available Products
As one of the trusted Q345 carbon steel pipe suppliers and manufacturers in China, our delivery time is about 7-25 days, and we supply carbon steel tubes with various steel options and sizes. As a professional carbon steel pipe supplier, Huaxiao Metal specializes in producing different types of carbon steel pipes at competitive prices.
- ID: 1/8″ to 72″
- Outer Diameter (OD): 1/4″ to 48″
- Wall Thickness (WT): SCH10 to XXS
- Length: 5.8m, 6m, 11.8m, 12m or customized lengths.
- Delivery Time: 7-25 days
- Shapes: Round, Square, Rectangular tube, etc.
- Types: Seamless Pipes, Welded Tubes
With large stock availability, strict quality inspection, and fast international shipment, we provide stable supply solutions for global buyers.
📩 Contact us now to get the latest Q345 Steel Pipe price per ton.
Looking Forward to Becoming One of Your Q345 Steel Pipe Suppliers
Table of Contents
Manufacturing Processes: Seamless vs. Welded Q345 Pipes
Q345 Seamless Steel Pipe (SML)
Manufactured through hot rolling or cold drawing from a solid billet, Q345 seamless pipes have no weld seam.
Advantages: High pressure resistance, uniform structure, and better integrity.
Applications: High-pressure boilers, chemical processing, and hydraulic cylinders.
Q345 Welded Steel Pipe (ERW, LSAW, SSAW)
Welded pipes are formed by rolling Q345 steel coils or plates and welding the seam.
ERW (Electric Resistance Welded): Best for medium diameters and structural use.
LSAW (Longitudinal Submerged Arc Welded): Used for large diameter, heavy-wall pipes in oil and gas.
SSAW (Spiral Submerged Arc Welded): Ideal for low-pressure fluid transport and piling.
Technical Specifications and Standards
When you buy from Q345 Steel Pipe suppliers like Huaxiao Metal, you need to ensure the product matches your local engineering codes.
Chemical Composition Comparison
While the base material is Q345, the pipe manufacturing process requires strict control over trace elements:
| Element | Q345B Content (%) | Q345D Content (%) |
| Carbon (C) | ≤ 0.20 | ≤ 0.18 |
| Manganese (Mn) | 1.00 – 1.60 | 1.00 – 1.60 |
| Silicon (Si) | ≤ 0.55 | ≤ 0.50 |
| Phosphorus (P) | ≤ 0.035 | ≤ 0.030 |
| Sulfur (S) | ≤ 0.035 | ≤ 0.025 |
Mechanical Performance
The strength of the pipe is influenced by its wall thickness. As the wall gets thicker, the yield strength slightly adjusts:
Yield Strength (ReH): ≥ 345 MPa (for T ≤ 16mm)
Tensile Strength (Rm): 470 – 630MPa
Elongation: ≥ 21%
Q345 Steel Pipe Equivalents: Global Standards
International buyers often ask for equivalents to match ASTM or EN standards. Huaxiao Metal provides Q345 Carbon Steel Pipes that meet or exceed the performance of the following:
| Chinese Standard (GB/T) | American Standard (ASTM/API) | European Standard (EN) |
| GB/T 8162 (Structural) | ASTM A572 Grade 50 | EN 10210 S355JRH |
| GB/T 8163 (Fluid) | ASTM A106 Grade B (Modified) | EN 10216 S355J2 |
| GB/T 3087 (Boiler) | ASTM A192 / A210 | DIN 17175 St52 |
Unleash Precision and Durability with Our Premium Q345 Steel Pipe for Sale!
Protective Coatings: Ensuring Longevity
Since Q345 is a carbon steel, it is susceptible to rust. We provide several surface treatments:
Black Painting/Varnish: Standard protection for transit.
Hot-Dipped Galvanized: Best for outdoor structural use.
3PE Coating (3-Layer Polyethylene): The gold standard for underground oil and gas pipelines.
FBE Coating: Fusion Bonded Epoxy for chemical resistance.
Advantages of Q345 Carbon Steel Tube
Q345 carbon steel tube, also known as low-alloy high-strength structural steel, offers several advantages making it a popular choice in various industries. Here are the key benefits:
High Strength: Q345 has a high yield strength, typically around 345 MPa, which allows it to support substantial loads and withstand heavy stress without deformation.
Good Weldability: It has excellent welding properties, making it easier to join sections of the tube without compromising structural integrity.
Versatility: This material is suitable for various applications, including construction, manufacturing, automotive, and machinery due to its strength and durability.
Corrosion Resistance: Q345 steel provides good resistance to atmospheric corrosion, which is enhanced with appropriate coatings, making it ideal for outdoor and harsh environments.
Cost-Effective: Compared to other high-strength materials, Q345 offers a balance between performance and cost, making it a cost-effective solution for many projects.
Impact Resistance: It retains good toughness and impact resistance at lower temperatures, which is crucial for structures exposed to variable weather conditions.
Formability: Q345 steel tubes can be easily formed and shaped into different sizes and specifications, providing flexibility in design and application.
Fatigue Resistance: The steel has good fatigue resistance, making it suitable for applications involving cyclic loading, such as bridges and cranes.
Availability: Q345 steel tubes are widely available and come in various dimensions and specifications, ensuring that they can meet diverse project requirements.
These advantages make Q345 carbon steel tubes a reliable and efficient choice for structural and mechanical applications.
Looking Forward to Becoming One of Your Q345 Carbon Steel Tube Manufacturers
Application Q345 Carbon Steel Tube
Huaxiao Metal is one of the outstanding Q345 steel pipe suppliers in China. Many customers purchase q345 steel tube for applications in the following ranges：
- Construction and Infrastructure
- Automotive Industry
- Machinery and Equipment
- Energy Sector
- Shipbuilding and Marine Engineering
- Transportation
- Aerospace
- Industrial Applications
- Agriculture
Why Huaxiao Metal is Your Preferred Q345 Pipe Manufacturer?
Navigating the global steel market can be difficult. Here is why clients choose Huaxiao Metal:
- 15+ years of export manufacturing experience
Rigorous Testing: Every Q345 Steel Pipe undergoes Hydrostatic testing, Eddy Current testing, and Ultrasonic inspection.
Competitive Q345 Steel Pipe Prices: By optimizing our supply chain and manufacturing efficiency, we provide factory-direct pricing.
Global Export Expertise: We handle all documentation, including CO (Certificate of Origin), MTC (Mill Test Certificate), and customized packaging for sea freight.
Flexible MOQ: Whether you need a single container or a bulk vessel shipment, we accommodate projects of all scales.
Unleash Precision and Durability with Our Premium Q345 Steel Pipe for Sale!
FAQ: Common Questions About Q345 Steel Pipe
Can Q345B pipe be used for high-pressure steam?
Yes, but it must be manufactured under the GB/T 3087 or GB/T 5310 standard for boiler tubes. Standard structural Q345B should not be used for high-pressure steam without proper certification.
ow does the price of Q345 pipe compare to Q235?
Generally, Q345 steel pipes are 5%-10% more expensive than Q235 steel pipes due to the addition of alloying elements (manganese, silicon) and their higher strength. However, since Q345 steel pipes can achieve the same strength with thinner walls, they can usually reduce the overall weight and cost of a project.
What is the difference between Q345 and S355 pipes?
In most engineering applications, they are largely interchangeable. S355 is a European standard (EN 10025/10210), while Q345 is a Chinese standard (GB/T 1591/8162). Both have a yield strength of approximately 350 MPa.
What is Q345 Steel Pipe equivalent to?
It is roughly equivalent to ASTM A572 Grade 50 structural steel pipe.
Is Q345 Steel Pipe suitable for welding?
Yes. It has excellent weldability due to its low carbon content.
What is the current Q345 Steel Pipe price?
Prices vary depending on size and quantity. Contact Huaxiao Metal for real-time pricing.
Contact Us For China Q345 Carbon Steel Pipe Prices
If you are searching for reliable Q345 Steel Pipe suppliers, competitive Q345 Steel Pipe prices, or large Q345 Steel Pipe stock, Huaxiao Metal is your trusted partner.
We provide high-strength structural pipes with strict quality control and fast global delivery.
📩 Contact us today to:
Request a detailed quotation
Check available stock
Get technical datasheets
Secure project-based pricing
Let Huaxiao Metal support your next structural project with premium Q345 Steel Pipe solutions.
Huaxiao Metal Products
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