Two Non-Heat-Treatable Alloys with Different Jobs
1100 aluminum pipe offers superior electrical conductivity, high thermal conductivity, and excellent formability, making it ideal for chemical fluid routing, electrical busbars, and HVAC applications. 5052 aluminum pipe is alloyed with magnesium, providing more than double the structural strength and exceptional fatigue resistance, and is the standard marine-grade aluminum for saltwater environments, high-pressure fluid systems, and heavy-duty structural applications.
Chemical Composition
1100 contains a minimum of 99.0 percent aluminum with silicon plus iron limited to 1.0 percent and copper 0.05 to 0.20 percent. 5052 contains 95.0 to 97.0 percent aluminum, magnesium 2.2 to 2.8 percent, chromium 0.15 to 0.35 percent, and copper 0.10 percent maximum. The magnesium dissolves into the matrix to increase strength without ruining weldability, and chromium prevents stress corrosion cracking in marine service.
Mechanical Properties
1100-H112 has a tensile strength of 90 to 110 MPa, yield of 35 MPa minimum, and elongation of 15 to 25 percent with low fatigue resistance. 5052-H32 has a tensile strength of 210 to 260 MPa, yield of 130 MPa minimum, and elongation of 10 to 20 percent with high fatigue resistance. In practice 5052 is two to three times stronger than 1100 and is mandatory for high-pressure fluids.
Physical and Electrical Properties
1100 has density 2.71 g per cubic centimeter, thermal conductivity about 220 W per meter per Kelvin, and electrical conductivity about 59 percent IACS. 5052 has density 2.68 g per cubic centimeter, thermal conductivity about 138 W per meter per Kelvin, and electrical conductivity about 35 percent IACS. For electrical busbars and heat exchangers, 1100 is always the better choice.
Corrosion Resistance
Both form protective oxide layers. 1100 is excellent in standard atmospheres and mild chemicals but only moderate in marine environments, while 5052 is excellent in saltwater and heavy industrial conditions. For pure water, food-grade liquids, and mild chemicals, 1100 prevents contamination; near the ocean or on ships, 5052 is the correct choice.
Applications
1100 serves chemical low-pressure routing, HVAC heat exchangers and condenser coils, electrical tubular busbars and grounding pipes, and food processing lines. 5052 serves shipbuilding fluid lines, boat railings, offshore hydraulic returns, medium-pressure gas lines, automotive fuel and brake lines, and lightweight structural frameworks.
Frequently Asked Questions
Q: Which pipe is stronger?
A: 5052, with two to three times the strength of 1100.
Q: Which conducts electricity better?
A: 1100, at about 59 percent IACS versus 35 percent for 5052.
Q: Can 1100 be used in marine environments?
A: Only moderately; 5052 is the marine-grade choice.
Q: Which is better for HVAC?
A: 1100, for superior thermal conductivity.
Q: Which is cheaper?
A: 1100, with lower material cost.
Q: What are 5052 pipes used for?
A: Marine systems, pressure lines, and structural frameworks.
Contact us for 1100 and 5052 seamless pipes with certified properties and engineering support for your application.
