1. What are seamless oval, octagonal, triangular, and other special-shaped aluminum tubing?
Special-shaped seamless steel pipe is a general term for seamless steel pipes with other cross-sectional shapes except round pipes.
They can be split into three categories based on the materials: plastic special-shaped pipes, aluminum alloy special-shaped pipes, and seamless steel pipes. Oval special-shaped tubes, triangular special-shaped tubes, hexagonal special-shaped tubes, diamond-shaped special-shaped tubes, octagonal special-shaped tubes, semi-circular special-shaped tubes, unequal hexagonal special-shaped tubes, five-petal plum blossom special-shaped tubes, and biconvex shaped tubes are the most common special-shaped tubes. Specially shaped pipes include corrugated special-shaped pipes, double-concave special-shaped pipes, melon-shaped special-shaped pipes, and special-shaped pipes with a conical shape.
According to the different cross-sectional shapes and sizes of steel pipes, they can be divided into special-shaped seamless steel pipes with equal wall thickness (code-named D), special-shaped seamless steel pipes with unequal wall thickness (code-named BD), and variable-diameter special-shaped seamless steel pipes (code-named BJ). Special-shaped seamless steel pipes are widely used in various structural parts, tools, and mechanical parts. Compared with round pipes, special-shaped pipes generally have a larger moment of inertia and section modulus, and have greater bending and torsion resistance, which can greatly reduce the weight of the structure and save steel. Special-shaped pipes are generally distinguished based on their cross-sections. According to materials, they can be divided into seamless steel pipes, aluminum alloy special-shaped pipes, and plastic special-shaped pipes. The following mainly introduces the special-shaped steel pipes.
Special-shaped steel pipes can be divided into oval special-shaped steel pipes, triangular special-shaped steel pipes, hexagonal special-shaped steel pipes, rhombus special-shaped steel pipes, octagonal special-shaped steel pipes, semi-circular special-shaped steel pipes, unequal hexagonal special-shaped steel pipes, and five-petal plum blossom shaped special-shaped steel pipes. , Double convex special-shaped steel pipe, double concave special-shaped steel pipe, melon-shaped special-shaped steel pipe, conical special-shaped steel pipe, corrugated special-shaped steel pipe.
Special-shaped pipes are divided into special-shaped square pipes, rectangular special-shaped pipes, special-shaped welded pipes, and spiral welded pipes, specifications: 20*20mm-500mm, wall thickness 0.6mm-20mm, spiral steel pipes. Spiral steel pipe specifications, 219mm-2020mm, wall thickness 5mm-20mm. Straight seam specifications include 4 points, 6 points, 1 inch, 1.2 inches, 1.5 inches, 2 inches, 2.5 inches, 3 inches, 4 inches, 5 inches, 6 inches, 8 inches, 102, 108, 127, 133, 139, Special-shaped pipes with specifications such as 159, 168, 177, 194, 219, 273, and 325 generally refer to square and rectangular steel pipes.
2. Chemical composition of specially shaped aluminum tubing
| Element | Fe | Si | Mn | Cr | Cu | Ti | Zn | Mg | Other single | Total other |
|---|---|---|---|---|---|---|---|---|---|---|
| Minimum value | - | - | - | 0.18 | 1.2 | - | 5.1 | 2.1 | - | - |
| Maximum value | 0.5 | 0.4 | 0.3 | 0.28 | 2 | 0.2 | 6.1 | 2.9 | 0.05 | 0.15 |
3. Mechanical properties of specially shaped aluminum tubing
| Thickness t in. | Heat treatment or condition | Tensile strength σb ksi | Yield point σs ksi | Elongation or elongation after break δ % |
|---|---|---|---|---|
| 0.015~0.499 | O | ≥40.04 | ≥21.04 | ≥10 |
| 0.5~2 | O | ≥40.04 | - | ≥10 |
| 0.008~0.011 | T6 and T62 | ≥74 | ≥63 | ≥5 |
| 0.012~0.039 | T6 and T62 | ≥76 | ≥67 | ≥7 |
| 0.04~0.125 | T6 and T62 | ≥78 | ≥68 | ≥8 |
| 0.126~0.249 | T6 and T62 | ≥78 | ≥69 | ≥8 |
| 0.250~0.499 | T651 and T62 | ≥78 | ≥67 | ≥9 |
| 0.5~1 | T651 and T62 | ≥78 | ≥68 | ≥7 |
| 1.001~2 | T651 and T62 | ≥77 | ≥67 | ≥6 |
| 2.001~2.5 | T651 and T62 | ≥76 | ≥64 | ≥5 |
| 2.501~3 | T651 and T62 | ≥72 | ≥61 | ≥5 |
| 3.001~3.50 | T651 and T62 | ≥71 | ≥58 | ≥5 |
| 3.501~ 4 | T651 and T62 | ≥67 | ≥54 | ≥3 |
| 0.040~0.249 | T73 | ≥67 | ≥56 | ≥8 |
| 0.25~1 | T7351 | ≥69 | ≥57 | ≥7 |
| 1.001~2 | T7351 | ≥69 | ≥57 | ≥6 |
| 2.001~2.5 | T7351 | ≥66 | ≥52 | ≥6 |
| 2.501~3 | T7351 | ≥64 | ≥49 | ≥6 |
| 3.001~3.5 | T7351 | ≥63 | ≥48 | ≥6 |
| 3.501~4 | T7351 | ≥61 | ≥48 | ≥6 |
3. Specifications of special-shaped aluminum tubing
seamless oval, octagonal, triangular, and other special-shaped aluminum tubing suppliers in China
As a trusted aluminum alloy pipe manufacturer and supplier, Shanghai Yinggui Metal Products Co., Ltd. is committed to making manufacturing easier for our business partners. Shanghai Yinggui Metal provides sales of 2000, 3000, 4000, 5000, 6000, and 7000 series, which can be used for aviation aluminum materials, industrial molding, automated machinery parts, molds, etc.
| Product name | Special shape seamless aluminum tube |
| Grade | 2000, 3000, 5000, 6000, 7000 Series |
| Temper | T3-T8 |
| Application | Widely used |
| Shape | Other |
| Standards | ASTM B210, B221, B241, B483, B491, B547, AMS WW-T-700/7, AMS 4154, AMS QQ-A-200/11, etc |
| Model Number | Royal-34 |
| Tolerance | ±1% |
| Processing Service | Bending, Decoiling, Welding, Punching, Cutting |
| Delivery Time | Short delivery time |
| Surface treatment | Mill Finish |
| Color | Customized Color |
| Material | Aluminum Alloy |
| Usage | Aluminum Extruded Profiles Extrusion Aluminum |
| Type | OEM Aluminum Extrusions Profiles |
| Length | Customizable |
4. Applications and characteristics of special-shaped aluminum tubing
Special-shaped pipes are widely used in aviation, automobiles, shipbuilding, mining machinery, agricultural machinery, construction, textiles, and boiler manufacturing. The production methods of special-shaped pipes include cold drawing, electric welding, extrusion, hot rolling, etc. Among them, the cold drawing method has been widely used. Its advantages are high-pressure resistance, good toughness, long pipe sections, and few joints. It is widely used and the rolling technology of domestic steel mills is also very mature. However, special-shaped pipes are mainly pipes made through special processes.
Compared with traditional pipes, this has obvious advantages. It will become more and more common. Since the manufacturing process of this kind of pipeline is relatively strict, it is also a good transportation pipeline for some transportation media with special transportation requirements. Moreover, the main raw material of this special-shaped pipe is steel. Therefore, the anti-corrosion performance of this kind of pipe is better than other pipes, so this kind of pipe is often chosen when transporting some corrosive liquids.
5. Main aluminum alloy product brand list
| China | ISO（EU） | Japan | India | Russia | EN（Europe） | Germany | France | U.K. | USA |
| 2A11(LY11) | Al Cu4MgSi | A2017 | 24534 | д1/1110 | 2017/A92017 | ||||
| 2B11(LY8) | AlCu5MgSi(A) | A2017A | д1п/1111 | AlCuMg1/3.1325 | 2017A(A-U4G) | 2017A | |||
| 2A12(LY12) | AlCu4MgSi1 | A2024 | 24530 | д16/1160 | EN AW-2024/AlCu4Mg1 | AlCuMg2/3.1355 | 2024(A-U4G1) | 2024 | |
| 2B12(LY9) | A2024 | д16/1160 | 2024/A92024 | ||||||
| 2A14(LD10) | AlCu4MgSi | A2014 | 24345 | AK8/1380 | EN AW-2014/AlCu4Mg | AlCuSiMn/3.1255 | 2014(A-U4SG) | 2014(H15) | 2014/A92014 |
| 2A70(LD7) | A2618 | AK4-1/1141 | 2618/A92618 | ||||||
| 2014 | AlCu4SiMg | A2014 | 24345 | AK8/1380 | EN AW-2014/AlCu4SiMg | AlCuSiMn/3.1255 | 2014(A-U4SG) | 2014(H15) | 2014/A92014 |
| 2014A | AlCu4SiMg(A) | A2014A | EN AW-2014/AlCu4SiMg(A) | 2014A | |||||
| 2017 | AlCu4MgSi | A2017 | д1/1110 | 2017/A92017 | |||||
| 2017A | AlCu4MgSi(A) | A2017A | 24534 | AK21/1120 | EN AW-2017A/AlCu4MgSi(A) | AlCuMg1/3.1325 | 2017A(A-U4G) | 2017A/A92017 | |
| 2024 | AlCu4Mg1 | A2024 | 24530 | д16/1160 | EN AW-2024/AlCu4Mg1 | AlCuMg2/3.1355 | 2024(A-U4G1) | 2024/A92024 | |
| A2618 | EN AW-2618/AlCu2Mg1.5Ni | 2618A(A-U2GN) | 2618A | ||||||
| 5A02(LF2) | AlMg2.5 | A5052 | AMr2/1520 | EN AW-5052/AlMn2.5 | AlMg2.5/3.3523 | 5052(A-G2.5C) | 5052(NS4) | 5052/A95052 | |
| 5A05(LF5) | AlMg5Mn1 | A5056 | AMг5/1550 | EN AW-5019/AlMg5 | AlMg5/3.3555 | 5456(A56S) | 5456/A95456 | ||
| 5B05(LF10) | AlMg5Cr | A5056 | 55000 | AMr5п/1551 | 5056/A95056 | ||||
| 5005 | AlMg1(B) | A5005 | 51000-A | AMr1/1510 | EN AW-5005/AlMg1(B) | 5005(A-G0.6) | 5005(N41) | 5005/A95005 | |
| 5052 | AlMg2.5 | A5052 | AMr2/1520 | EN AW-5052/AlMg2.5 | AlMg2.5/3.3523 | 5052(A-G2.5C) | 5052(2L55) | 5052/A95052 | |
| 5083(LF4) | AlMg4.5Mn0.7 | A5083 | 54300 | EN AW-5083/AlMg4.5Mn0.7 | 5083(A-G4.5MC) | 5083(NT8) | 5083/A95083 | ||
| 5086 | AlMg4 | A5086 | AMr4/1540 | EN AW-5086/AlMg4 | AlMg4Mn/3.3545 | 5086(A-G4MC) | 5086/A95086 | ||
| 6061(LD30) | AlSi1MgCu | A6061 | 65032 | Aд33/1330 | EN AW-6061/AlMg1SiCu | AlMgSi1Cu/3.2311 | 6061(A-GSUC) | 6061(N20/H20) | 6061/A96061 |
| 6101 | E-AlMgSi | A6101 | EN AW-6101A/E-AlMgSi | E-AlMgSi0.5/3.2207 | 6101/A96101 | ||||
| 7A09(LC9) | AlZn5.5MgCu | A7075 | 76528 | B95/1950 | EN AW-7075/AlZn5.5MgCu | AlZnMgCu1.5/3.4365 | 7075(A-Z5GU) | 7075(C77S) | 7075/A97075 |
| 7075 | AlZn5.5MgCu | A7075 | 76528 | B95/1950 | EN AW-7075/AlZn5.5MgCu | AlZnMgCu1.5/3.4365 | 7075(A-Z5GU) | 7075(C77S) | 7075/A97075 |
