Aluminum Tube/Pipe

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6061 6063 Aluminum Pipe / Tube

Product Introduction

Technical Parameters of Aluminum Tube & Pipe
Parameter CategorySpecific ParameterDescription / Typical ValuesCommon Standards (Examples)
Basic IdentificationAlloy DesignationCommon alloys used for tubular products.
Common Alloys:
• 6061-T6/T6511: The most common structural alloy. Excellent strength, weldability, and corrosion resistance. Used for frames, rails, and mechanical components.
• 3003-H14/H18: Good formability and corrosion resistance. Used for heat exchangers, decorative applications.
• 5052-H32: Excellent corrosion resistance, especially to salt water. Good weldability and moderate strength.
• 2024-T3: High strength, primarily used in aerospace applications. Poor weldability.
• 7075-T6: Ultra-high strength, used in high-stress applications. Not recommended for welding.
ASTM B210 (Drawn Tube), ASTM B241 (Extruded Tube/Pipe), ASTM B491 (Extruded Round Tube)
TemperIndicates the mechanical strength.
Common Tempers:
• O (Annealed): Soft, maximum ductility.
• H18: Full hard.
• T6: Solution heat-treated and artificially aged.
• T6511: Solution heat-treated, stress-relieved by stretching, and artificially aged (improved for machining).
ASTM B210, B241
Dimensional SpecificationsType• Tube: Generally for structural, mechanical, and architectural use. Dimensions often specified by Outside Diameter (OD) and Wall Thickness (WT).
• Pipe: Generally for fluid transport. Dimensions specified by Nominal Pipe Size (NPS) and schedule wall thickness.
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Outside Diameter (OD)The external diameter of the tube/pipe.
Typical Range (Tube): 3 mm to 300+ mm.
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Wall Thickness (WT)The thickness of the tube wall.
Typical Range: 0.5 mm to 25+ mm.
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Inside Diameter (ID)The internal diameter. Calculated as OD - 2*WT./
Nominal Pipe Size (NPS)Standardized dimension system for pipe (e.g., NPS 1/2, NPS 2, NPS 6).ASME B36.10M, B36.19M
Schedule (SCH)Standard wall thickness designations for pipe (e.g., SCH 40, SCH 80, SCH 160).ASME B36.10M, B36.19M
OD ToleranceAllowable deviation from the specified outside diameter.ASTM B210, B241
Wall Thickness ToleranceAllowable deviation from the specified wall thickness. Expressed as a percentage.ASTM B210, B241
Straightness ToleranceAllowable deviation from a straight line along the length.ASTM B210, B241
LengthStandard random lengths or cut-to-length./
Mechanical PropertiesUltimate Tensile Strength (UTS)The maximum stress the tube can withstand.
Example (6061-T6): 38 ksi (262 MPa) min
Example (3003-H18): 29 ksi (200 MPa) min
Example (5052-H32): 31 ksi (214 MPa) min
ASTM E8/E8M
Tensile Yield Strength (TYS)The stress at which the bar begins to deform plastically.
Example (6061-T6): 38 ksi (262 MPa) min
Example (2024-T3): 47 ksi (324 MPa) min
Example (7075-T6): 69 ksi (476 MPa) min
ASTM E8/E8M
Elongation at BreakThe stress at which the tube begins to deform plastically.
Example (6061-T6): 35 ksi (241 MPa) min
Example (3003-H18): 27 ksi (186 MPa) min
Example (5052-H32): 25 ksi (172 MPa) min
ASTM E8/E8M
HardnessTypical (6061-T6): Brinell 95 HBASTM E10
Burst PressureThe maximum internal pressure the tube can withstand before failure. Calculated using Barlow's formula: P = 2 * S * t / D, where S is hoop stress, t is min wall thickness, D is OD./
Physical & Chemical PropertiesDensityStandard Value: 2.70 g/cm³ (0.098 lb/in³)/
Modulus of ElasticityStandard Value: 10,000 ksi (69 GPa)/
Chemical CompositionElemental limits as defined by the alloy specification.ASTM B210, B241
Thermal ConductivityExample (6061-T6): 167 W/m·K/
Electrical ConductivityExample (6061-T6): 43% IACSASTM B193
Fabrication & PerformanceWeldabilityRating:
• 6061, 5052, 3003: Excellent (using GTAW/TIG or GMAW/MIG with appropriate filler like 4043 or 5356).
• 2024, 7075: Poor (crack-sensitive).
AWS D1.2
MachinabilityRating (6061-T6): Good.
Rating (2011-T3): Excellent (Free-machining alloy, but less common in tube form).
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Bendability / FormabilityThe ability to be bent without kinking or cracking. Heavily dependent on alloy, temper, and the ratio of OD to Wall Thickness. Annealed (O) tempers are best./
Corrosion ResistanceGenerally excellent for most alloys. 5052 is particularly good for marine environments./
Anodizing QualityCan be anodized for enhanced corrosion resistance and color. 6061 anodizes well./
Testing & CertificationHydrostatic Test PressureFor pressure applications, tubes may be tested to a specified pressure without failure.ASTM B210, B241
Eddy Current TestA non-destructive test to detect defects in seamless and welded tubes.ASTM E215
Ultrasonic TestA more sensitive non-destructive test for internal and external defects.ASTM E2375

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