Aluminum Round Bars
Aluminum round bars are widely used in various industrial applications due to their excellent corrosion resistance, especially in environments containing phosphoric, nitric, chloride, and sulfuric acids. The 6061 aluminum square rod is known for its stability even at extremely low temperatures, such as that of liquid nitrogen, making it suitable for cryogenic applications. Its high commercial demand reflects its versatility and performance in demanding conditions.
For applications requiring high ductility, the 6082 aluminum flat bar offers a low sulfur content, achieved through advanced ladle refining techniques. This ensures better formability and structural integrity. In the molten state, a 5052 hexagonal aluminum rod is often exposed to vacuum to remove hydrogen, with some oxygen and nitrogen also being eliminated. This process enhances the material’s purity and mechanical properties.
The 6063 aluminum rod contains Tungsten and vanadium, which form carbides during solidification, improving the hardness and dimensional stability of the final product. Similarly, in 7075 aluminum rods, elements like manganese, silicon, or aluminum are added during steelmaking to remove dissolved oxygen, sulfur, and phosphorus from the melt, ensuring a cleaner and more consistent structure.
Key Features of Aluminum Round Bars:
- High strength-to-weight ratio
- Excellent corrosion resistance
- Good thermal and electrical conductivity
- High temperature resistance
- Dimensional stability
- Long service life
- Resistant to mechanical stress
Common aluminum round bar grades include 6061, 6082, 5083, 5086, 5052, 6063, 7075, and 1100. These products are manufactured according to international standards such as ASTM B221 / ASTM SB221 and can be produced in various dimensions including EN, DIN, JIS, ASTM, BS, ASME, and AISI. Available sizes range from 5mm to 500mm in diameter, with lengths up to 3000mm or more. Surface finishes include black, bright polishing, rough turning, NO.4 finish, matte finish, and BA finish.
Chemical Composition of Aluminum Round Bars
| Grade | Si | Fe | Cu | Zn | Mn | Mg | Ti | Cr | Al | Others (Total) |
| Aluminum | 0.40 – 0.80 | 0.70 max | 0.15-0.40 | 0.25 max | 0.15 | 0.8-1.2 | 0.15 max | 0.04-0.35 | Balance | 0.15 max |
Mechanical Properties of Aluminum Round Bars
| Temper | Tensile | Hardness | ||||
| Ultimate | Yield | Elongation | Brinell | |||
| KSI | MPA | KSI | MPA | % | ||
| T6, T651 | 45 | 310 | 21 | 145 | 25 | 65 |
Physical Properties of Aluminum Round Bars
| Physical Property | Value |
| Density | 2.70 g/cm³ |
| Melting Point | 582 °C |
| Thermal Expansion | 23.4 x 10â»â¶ /K |
| Modulus of Elasticity | 69 GPa |
| Thermal Conductivity | 170 W/m·K |
| Electrical Resistivity | 43% IACS |
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