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Straight Welded Square Tube and Pipe
Material, Specification, Key Features (Detailed Introduction)
Straight welded square tubes and pipes are structural components widely used in various industries due to their strength, versatility, and ease of fabrication. These products are typically made from carbon steel, stainless steel, or other alloys, depending on the specific application requirements.
Key Features:
Uniform Shape: The square shape provides consistent strength and stability.
Welded Construction: The welding process enhances the structural integrity and allows for longer lengths.
Versatility: Suitable for a wide range of applications, including construction, automotive, and furniture manufacturing.
Corrosion Resistance: Depending on the material, some square tubes and pipes offer excellent resistance to corrosion.
Chemical Composition
The chemical composition of straight welded square tubes and pipes varies based on the material used. Below is a table presenting the typical chemical composition for common steel grades.
| Grade | C (%) | Mn (%) | P (%) | S (%) | Si (%) | Cr (%) | Ni (%) |
| ASTM A36 | 0.26-0.29 | 0.60-0.90 | ≤0.04 | ≤0.05 | ≤0.40 | - | - |
| ASTM A500 | 0.26-0.29 | 0.60-1.20 | ≤0.04 | ≤0.05 | ≤0.40 | - | - |
| ASTM A53 | 0.25-0.30 | 0.40-0.70 | ≤0.04 | ≤0.05 | ≤0.10 | - | - |
| ASTM A992 | 0.23-0.26 | 0.70-1.00 | ≤0.04 | ≤0.05 | ≤0.50 | 0.20-0.40 | 0.30-0.50 |
Mechanical Properties
The mechanical properties of straight welded square tubes and pipes are crucial for determining their suitability for various applications. Below is a table summarizing the typical mechanical properties for common steel grades.
| Grade | Yield Strength (MPa) | Tensile Strength (MPa) | Elongation (%) | Hardness (HB) |
| ASTM A36 | 250 | 400-550 | 20-23 | 119-159 |
| ASTM A500 | 240-350 | 310-580 | 20-25 | 120-160 |
| ASTM A53 | 240 | 330-480 | 20-30 | 120-150 |
| ASTM A992 | 345 | 450-620 | 20-25 | 150-190 |
Physical Properties
The physical properties of straight welded square tubes and pipes are essential for understanding their behavior under various conditions. Below is a table presenting the typical physical properties.
| Property | Value |
| Density | 7850 kg/m³ |
| Melting Point | 1425-1540 °C |
| Thermal Conductivity | 50 W/m·K |
| Electrical Resistivity | 1.68 x 10^-8 Ω·m |
Process Performance
The process performance of straight welded square tubes and pipes is influenced by their material properties and manufacturing techniques. Below is a table summarizing key process performance metrics.
| Property | Value |
| Weldability | Good |
| Formability | Excellent |
| Machinability | Moderate |
| Corrosion Resistance | Varies by grade |
Steel Grade (Detailed Introduction)
Steel grades for straight welded square tubes and pipes are classified based on their chemical composition and mechanical properties. Common grades include:
ASTM A36: A low carbon steel grade known for its good weldability and machinability, widely used in construction and structural applications.
ASTM A500: A specification for cold-formed welded and seamless carbon steel structural tubing, offering higher strength and better mechanical properties.
ASTM A53: A standard specification for pipe suitable for welding and bending, commonly used in structural and pressure applications.
ASTM A992: A high-strength steel grade used primarily in building frames, known for its excellent weldability and structural performance.
Application
Straight welded square tubes and pipes find applications in various industries, including:
Construction: Used in building frames, columns, and beams.
Automotive: Employed in chassis and structural components.
Furniture: Commonly used in the manufacturing of tables, chairs, and shelving units.
Manufacturing: Utilized in machinery and equipment frames.
Possible Alternative Grades
Depending on specific requirements, alternative grades may be considered:
Stainless Steel Grades (e.g., 304, 316): For applications requiring corrosion resistance.
Alloy Steel Grades (e.g., AISI 4130): For higher strength and toughness.
Galvanized Steel: For enhanced corrosion protection in outdoor applications.
FAQ：
Q: Are you trading company or manufacturer?
A: A professional steel pipes materials inventor, manufacturer and solution provider
Q: How long is your delivery time?
A: Generally it is 3-5 days if the goods are in stock. or it is 10-15 days if the goods are not in stock, it is according to quantity.
Q: Do you provide samples? is it free or extra?
A: Yes, we could offer the sample for free charge but need pay the cost of freight.
Q: What is your terms of payment?
A: Payment<=2000USD, 100% in advance. Payment>=2000USD, 30% T/T in advance ,70% balance before shipment.
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Ms. Lucy Luo
Senior Sales
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