3003 Aluminum Round Tube

Supply Capacity: More Than 5000 Tons
Minimum Quantity: 20 Tons
Delivery Time: 3-45 Days
Delivery port: Shanghai, Tianjin, Qingdao, Ningbo, Guangzhou, etc.
Standard: ASTM, AISI, JIS, ISO, EN, BS, GB, etc.
Price Terms: FOB, CFR, CIF, etc.

1. Material Composition & Standards

 

Conforming to ASTM B210, ASTM B491, and EN 573-3 standards, 3003 aluminum round tubing features a manganese-enhanced alloy formulation optimized for superior formability and corrosion resistance:

Primary Elements:

Manganese (Mn): 1.0-1.5% (increases strength without compromising ductility)

Magnesium (Mg): ≤0.10% (trace amounts for processing enhancement)

Base Material:

Aluminum (Al): ≥97.8% (balance)

Impurity Limits:

Iron (Fe): ≤0.7%

Silicon (Si): ≤0.6%

Copper (Cu): 0.05-0.20%

Zinc (Zn): ≤0.10%

Supplied in strain-hardened tempers including H14 (¼ hard), H18 (½ hard), and O (annealed) per ASTM B210 specifications. Certified to MIL-T-5062B for marine applications and NSF/ANSI 61 for potable water systems. Third-party verification confirms consistent intermetallic phase distribution critical for uniform corrosion resistance.

 

 

2. Strength Performance

 

3003 offers exceptional cold-formability with moderate strength for structural applications:

Property O Temper H14 Temper H18 Temper Test Standard
Tensile Strength (Rm) 110-145 MPa 145-180 MPa 170-215 MPa ASTM E8
Yield Strength (Rp0.2) 35-50 MPa 125-150 MPa 160-195 MPa ASTM E8
Elongation at Break (%) 25-35% 8-15% 4-8% ASTM E8
Compression Yield 40 MPa 130 MPa 165 MPa ASTM E9
Shear Strength 75 MPa 100 MPa 130 MPa ASTM B769
Fatigue Endurance (10⁷ cycles) 60 MPa 75 MPa 95 MPa ISO 1099
Deep Drawing Ratio (LDR) 2.3 1.8 1.5 ISO 12004

 

Maintains >90% ductility at -196°C and exhibits excellent forming properties in cold-working operations.

 

3. Heat Treatment & Processing

 

As a non-heat-treatable alloy, mechanical properties are achieved through strain hardening:

Cold Working Process

Hot Rolling: Initial processing at 370-480°C to 8mm thickness

Cold Drawing: Sequential reductions achieving:

O Temper: Full anneal at 415°C

H14: 7-15% area reduction

H18: 25-30% area reduction

Intermediate Annealing: 315-345°C for 2 hours per 50% reduction

Resulting Microstructure

Grain size: ASTM 6-9 (10-30μm equiaxed grains)

Dispersoids: Al₆(Mn,Fe) phase particles (<0.5μm)

Dislocation density: 10⁷/cm² (O) to 10¹⁰/cm² (H18)

Texture coefficient: <0.65 for deep drawing applications

Recrystallization threshold: 250-280°C

4. Dimensions & Customization

 

Manufactured to precise tolerances for HVAC and architectural applications:

Parameter Standard Range Precision Tolerance Custom Options
Outer Diameter 3-400 mm ±0.1% OD Elliptical profiles
Wall Thickness 0.3-8 mm ±8% WT Tapered sections
Length 0.5-12 m +2mm/-0mm Coiled up to 60m
Straightness 1.5mm/m max. ±0.5mm/m
Ovality ≤1.2% TIR ≤0.5% TIR
Bend Radius (min) 1.0× OD Minimum 0.6× OD

 

Special Fabrication:

Expansion forming for heat exchanger connections

Rotary swaging for taper reduction

Custom end forming (flare, bead, bulge)

Roll grooving for mechanical joints

Spiral tube configurations

5. Corrosion Resistance Properties

 

Environmental Performance Data

Environment ISO 9223 Rating Corrosion Rate (μm/yr) Protection Recommendation
Fresh Water RC1 (Excellent) <0.5 μm/yr Internal passivation
Chemical Handling RC2 (Excellent) 1-3 μm/yr Polyethylene lining
Coastal Atmosphere RC3 (Good) 3-8 μm/yr Chromate conversion coating
Industrial Area RC3 (Good) 8-15 μm/yr Powder coating
Food Processing RC1 (Excellent) 0.2 μm/yr Electropolishing

 

Protection Systems:

Passivation: Nitric acid treatment per ASTM B580

Coatings:

Epoxy-phenolic coatings: 30-60μm DFT

Polyurethane: 40-80μm for UV resistance

Galvanic Protection: Zinc spray metallization + sealant

Biocidal Treatments: Silver-ion impregnation for microbial control

6. Machinability Characteristics

 

Optimization Parameters

Operation Tool Material Speed (m/min) Feed (mm/rev) Notes
Turning Carbide K10 250-450 0.25-0.45 Sharp positive rake
Milling Carbide K20 300-500 0.15-0.30 High helix tools
Drilling HSS-Co5 100-150 0.12-0.20 130° point angle
Tapping HSS-Co5 25-40 Pitch matched 90% thread depth

 

Performance Metrics:

Machinability index: 95% (baseline: 2011-T3=100%)

Surface roughness: Ra 0.5μm achievable dry machining

Built-up edge resistance: Excellent (Grade 1 per ISO 3685)

Chip formation: Continuous spiral chips

Tool life: 50% longer than 6061 alloy

Coolant recommendation: Minimal (5-7% emulsion)

7. Weldability & Joining Methods

 

Excellent Weldability Across Processes

Gas Metal Arc Welding (GMAW)

Filler wire: ER4043 (AlSi5) or ER1100

Shielding gas: Ar + 25-30% He mixture

Wire speed: 8-12 m/min (OD 12-50mm)

Heat input: ≤0.8 kJ/mm

Joining Methods

Soldering:

Zinc-aluminum solders: 390-450°C

Flux type: Non-corrosive organic

Adhesive Bonding:

Polyurethane adhesives: 18-25 MPa shear

Epoxy systems: 30-40 MPa tensile

Mechanical Fastening:

Beaded end connections

Push-to-connect fittings

Clinching for permanent joints

8. Physical Properties

Property Value Test Standard
Density 2.73 g/cm³ ASTM B311
Thermal Conductivity (25°C) 193 W/m·K ASTM E1461
CTE (20-100°C) 23.2 μm/m·°C ASTM E228
Electrical Conductivity 51% IACS ASTM B193
Modulus of Elasticity 69.0 GPa ASTM E111
Specific Heat (100°C) 897 J/kg·K ASTM E1269
Thermal Expansion Coefficient 0.55 m/m°C ASTM D696
Reflectivity (visible) 85% ASTM E903
Emissivity (polished) 0.05 ASTM E423

9. Surface Quality Standards

 

Finishing options:

Mill finish: Ra 0.8-1.2μm

Brushed finish: Ra 0.3-0.6μm

Mirror polish: Ra <0.1μm achievable

Satin anodizing: Ra 0.4μm

Inspection criteria (ASTM B491):

Surface imperfections: ≤0.005mm depth

Die marks: ≤0.05mm height

Discoloration: None

Oxide uniformity: >95% coverage

Cleaning protocols:

Alkaline cleaning per AMS 2647

Bright dipping for decorative applications

Steam cleaning for food-grade tubing

10. Certifications & Testing

 

Quality Assurance Protocols

Chemical Verification:

Optical emission spectrometry

ICP mass spectroscopy for impurities

Physical Testing:

Flattening test to 60% OD reduction

Reverse bend test: 180° without cracking

Hydrostatic pressure testing: 3× working pressure

NDT Methods:

Eddy current testing per ASTM E309

Ultrasonic wall thickness verification

Helium leak testing

Industry Certifications

NSF/ANSI 61 for drinking water systems

ASME BPVC Section VIII compliance

FDA CFR 21.177.1500 (Food contact)

MIL-T-5062B naval specification

PED 2014/68/EU Annex I

Lloyd’s Register Type Approval

Primary Applications: Heat exchanger components, condenser tubes, drip irrigation systems, furniture frameworks, decorative structures, chemical transfer lines, and cryogenic vessels where corrosion resistance and formability are critical.

Packaging: VCI paper interleaving + PE wrap bundles, crating with reinforced corners. Standard lead time: 3 weeks for stocked sizes.

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