What is a square tube?
Square tube is another name for a square tube, which is a steel tube with equal sides. It is made by rolling steel strips after processing. Square tubes can be made of various materials such as iron square tubes and aluminum square tubes. They are widely used in machinery, chemicals, automobiles, ships, textile machinery, construction and other industries.
What is an aluminum alloy square tube?
Aluminum alloy square tubes are made of aluminum alloy plates or strips that meet the requirements as raw materials, cut into suitable sizes, and processed into the required square tube shape through extrusion, stretching and other processes.
Marine aluminum square tubes are usually made of high-strength, corrosion-resistant aluminum alloys. Common alloy grades include 5083, 5086, 6061, 6063, etc. These alloys have excellent corrosion resistance and welding properties, and are suitable for use in the marine and shipbuilding industries.
Specifications
Square tube specifications:
| Square tube | ||
W1(mm) | W2(mm) | T (mm) |
| 25 | 25 | 2 |
30 | 30 | 2 |
| 40 | 40 | 3 |
| 50 | 50 | 3 |
| 60 | 40 | 4 |
| 75 | 75 | 6 |
| 80 | 40 | 4 |
| 100 | 100 | 3 |
| 100 | 100 | 6 |
| 100 | 50 | 5 |
Marine aluminum square tubes have various specifications, and the side length and wall thickness can be customized according to specific needs. Common side lengths range from tens of millimeters to hundreds of millimeters, and the wall thickness is also adjusted according to the use requirements.
Marine aluminum square tube specifications:
| Alloy | 5083, 5086, 5383, 5059, 6061, 6082, 6005A |
| Temper | H111/H112, T5/T6 |
| Certification | CCS,BV,LR,ABS,DNV-GL |
| Thickness | 3-50 mm |
| Marine Aluminum T Bar Aluminum Alloys Composition | |||||||||||||
| Alloy | Si | Fe | Cu | Mn | Mg | Cr | Ni | Zn | Ti | Ga | Other | Al | |
| Each | Total | ||||||||||||
| 5083 | 0.40 | 0.40 | 0.1 | 0.4-1.0 | 40.-4.9 | 0.05-0.25 | - | 0.25 | 0.15 | - | 0.05 | 0.15 | Remainder |
| 5383 | 0.25 | 0.25 | 0.20 | 0.7-1.0 | 4.0-5.2 | 0.25 | - | 0.40 | 0.15 | - | 0.05 | 0.15 | Remainder |
| 5086 | 0.40 | 0.50 | 0.1 | 0.2-0.7 | 3.5-4.5 | 0.05-0.25 | - | 0.25 | 0.15 | - | 0.05 | 0.15 | Remainder |
| 5059 | 0.45 | 0.05 | 0.25 | 0.6-1.2 | 5.0-6.0 | 0.25 | - | 0.4-0.9 | 0.20 | - | 0.05 | 0.15 | Remainder |
| 6061 | 0.4-0.8 | 0.7 | 0.15-0.4 | 0.15 | 0.8-1.2 | 0.04-0.35 | - | 0.25 | 0.15 | - | 0.05 | 0.15 | Remainder |
| 6005A | 0.5-0.9 | 0.35 | 0.3 | 0.5 | 0.4-0.7 | 0.3 | - | 0.2 | 0.1 | - | 0.05 | 0.15 | Remainder |
| 6082 | 0.7-1.3 | 0.5 | 0.1 | 0.4-1.0 | 0.6-1.2 | 0.25 | - | 0.2 | 0.1 | - | 0.05 | 0.15 | Remainder |
| Mechanical Properties of Marine Aluminum T Bar | |||||||
Alloy | Form | Thickness(mm) | Temper | Rm | Rp0.2 | A% Min | |
Min. | Aso | Aso | |||||
5086 | Shapes, Bar, Tube | 3≤t≤50 | H112 | 240 | 95 | 10 | 12 |
| 5083 | Shapes, Bar, Tube Shapes, Bar, Tube | 3≤t≤50 | H111 | 270 270 | 110 125 | 10 10 | 12 12 |
| 5059 | Shapes, Bar, Tube | 3≤t≤50 | H112 | 330 | 200 | 10 | |
5383 | Shapes, Bar, Tub | 3≤t≤50 | O | 290 | 145 | 17 | 17 |
Shapes, Bar, Tub | 3≤t≤50 | H112 | 310 | 190 | 13 | ||
6061 | Shapes, Bar, Tube Profiles | 3≤t≤50 3≤t≤50 | T5 or T6 | 260 245 | 240 205 | 10 | 8 4 |
| 6005A | Shapes, Bar, Tube Profiles | 3≤t≤50 | T5 | 260 | 215 | 9 | 8 |
Shapes, Bar, Tube Profiles | 3≤t≤10 | T6 | 260 | 215 | 8 | 6 | |
3≤t≤10 | 250 | 200 | 8 | 6 | |||
6082 | Shapes, Bar, Tube Closed shapes | 3≤t≤50 3≤t≤50 | T5 or T6 | 310 290 | 260 240 | 10 | 8 5 |
Advantages
Performance characteristics of aluminum alloy square tube:
1. Lightweight: Aluminum alloy is light in weight, reduces the total weight of the hull, and improves speed and fuel efficiency.
2. Corrosion resistance: Strong corrosion resistance, suitable for long-term use in high-salinity marine environments.
3. Formability: Easy to process, can be made into various shapes through processes such as extrusion and welding.
4. Strength and rigidity: Alloyed aluminum has high strength and rigidity to ensure the stability of the ship structure.
Application
Marine aluminum square tubes are widely used in shipbuilding, mainly including:
1. Hull structure: used as supporting structures such as beams, longitudinal beams and deck brackets, and the lightweight characteristics reduce the weight of the hull.
2. Internal and external decoration: Commonly used in cabin walls, ceilings and external decorative frames, with strong corrosion resistance.
3. Deck and passage: Make decks, passages and stairs, lightweight and non-slip suitable for high-load use.
4. Cabin partitions and furniture: Used for partitions and furniture structures to meet space and aesthetic requirements.
5. Equipment and pipeline brackets: Support mechanical equipment and pipeline systems, corrosion resistance suitable for seawater environments.
6. Life-saving equipment: used for lifeboat racks and support frames to ensure lightness and durability.
These applications make full use of the lightweight, corrosion resistance and machinability of aluminum square tubes to improve ship performance and service life.
