Introduction
The 3.5 inch carbon steel square steel tubing is a square hollow structural section made from carbon steel, commonly used in construction, structural frameworks, and industrial fabrication.
| Grade | Q195, Q215, Q235, Q345, Q355, SGCC, dx51d etc. | |||
| Standard | ASTM, GB, BS, EN, DIN | |||
| Thickness | 1.5mm-12mm, can be customized | |||
| Length | 1-12m, can be customized | |||
| Model number | 30*30mm-200*400mm, can be customized | |||
| Technique | ERW or seamless, customizable | |||
| Tolerance | ±1% | |||
| MOQ | 5 Tons | |||
| Application | Structure Pipe, Construction, Steel structure engineering, Curtain wall construction etc. | |||
Materials and Chemical Composition
|
Element |
Iron (Fe) |
Carbon (C) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) |
|
Content |
Base | 0.17% - 0.23% | 0.35% - 0.65% | ≤0.35% | ≤0.045% | ≤0.050% |
Mechanical Properties
| Mechanical Property | Q235 | Q345 | Q355 |
| Yield Strength | ≥235 MPa (34 ksi) [≤16mm] | ≥345 MPa (50 ksi) [≤16mm] |
≥355 MPa (51 ksi) [≤16mm] |
| Tensile Strength | 375-500 MPa (54-73 ksi) | 470-630 MPa (68-91 ksi) | 450-630 MPa (65-91 ksi) |
| Elongation (δ5) | ≥26% | ≥21% | ≥21% |
| Impact Energy (V-type) | ≥27 J (20℃, Grade B) | ≥34 J (20℃, Grade B) | ≥34 J (0℃, Grade B) |
Product Features
High Structural Strength
Manufactured from high-quality carbon steel, this square steel tubing offers excellent strength and load-bearing capacity. It is suitable for structural frameworks and engineering applications that require reliable mechanical performance.
Durable and Reliable
Carbon steel provides strong mechanical properties and long-term durability, allowing the tubing to maintain stable performance under demanding working conditions.
Easy to Fabricate
This carbon steel square tubing is easy to weld, cut, and process, making it ideal for construction, machinery manufacturing, and custom metal fabrication.
Customization Services
To meet the diverse requirements of different industries and engineering projects, we offer flexible customization services for our 3.5 inch carbon steel square steel tubing. Products can be manufactured according to specific technical requirements, ensuring they fit various structural and fabrication applications.
Surface Treatment Options
Multiple surface finishes are available, including black steel, galvanized, and anti-corrosion coatings to improve durability in different environments.
Custom Cutting and Processing
We provide additional processing services such as cutting, welding preparation, and other fabrication options to support project needs.
Standards and Material Grades
Products can be manufactured according to various international standards and material grades based on customer requirements.
Our professional production team ensures that all customized products meet strict quality standards and are delivered on time.
FAQs
What materials are used for the 3.5 inch square steel tubing?
The tubing is made from high-quality carbon steel and can be produced with different material grades according to international standards.
What surface treatments are available?
Surface finishes such as black steel, galvanized, and anti-corrosion coatings are available to meet different environmental conditions.
What standards does the product comply with?
The product can be manufactured according to international standards such as ASTM, EN, and GB depending on customer requirements.
Do you provide quality certificates?
Yes, a Mill Test Certificate (MTC) and other inspection documents can be provided with each shipment.
What is the typical delivery time?
Delivery time usually depends on order quantity and specifications, but standard orders can typically be completed within a few weeks.
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