5052 Aluminum Tubing

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, AMS 4005, and EN 573-3 standards, 5052 aluminum tubing features a magnesium-enriched alloy composition optimized for marine and industrial applications:

Primary Elements:

Magnesium (Mg): 2.2-2.8% (enhances strength and corrosion resistance)

Chromium (Cr): 0.15-0.35% (improves stress corrosion cracking resistance)

Base Material:

Aluminum (Al): ≥96.8% (balance)

Impurity Limits:

Iron (Fe): ≤0.40%

Silicon (Si): ≤0.25%

Copper (Cu): ≤0.10%

Manganese (Mn): ≤0.10%

Zinc (Zn): ≤0.10%

The alloy is supplied in strain-hardened tempers including H32 (¼ hard), H34 (½ hard), and H38 (full hard) per ASTM B210 specifications. Third-party verification through NADCAP AC7117 ensures consistent chromium distribution critical for pitting resistance in chloride environments.

 

2. Strength Performance

 

5052 demonstrates superior ductility-to-strength ratios ideal for pressure vessels and structural forms:

Property H32 Temper H34 Temper H38 Temper Test Standard
Tensile Strength (Rm) 195-240 MPa 230-275 MPa 270-305 MPa ASTM E8
Yield Strength (Rp0.2) 160-195 MPa 195-230 MPa 250-285 MPa ASTM E8
Elongation at Break (%) 12-18% 8-12% 5-8% ASTM E8
Shear Strength 125 MPa 145 MPa 170 MPa ASTM B769
Burst Pressure (OD20×WT2mm) 18.5 MPa 23.1 MPa 28.7 MPa ASTM B641
Fatigue Endurance (10⁷ cycles) 100 MPa 115 MPa 130 MPa ISO 1099
Impact Toughness (20°C) 27 J 22 J 15 J ASTM E23

Retains >95% strength at -40°C and demonstrates consistent compressive yield strength within 2% of tensile values.

 

3. Heat Treatment & Processing

 

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

Cold Working Process

Hot Rolling: Initial reduction at 400-450°C to 12mm thickness

Cold Drawing: 15-25% area reduction per pass

H32: 8-15% total reduction

H34: 16-24% total reduction

H38: 25-30% total reduction

Stabilization: 150°C for 60 minutes to relieve residual stresses

Resulting Microstructure

Grain size: ASTM 7-10 (5-15μm elongated grains)

Dislocation density: 10⁹/cm² (H32) to 10¹⁰/cm² (H38)

Texture coefficient: <0.7 for deep drawing applications

Recrystallization threshold: 260-280°C

Post-forming annealing is permitted at 345°C for stress relief without property degradation.

 

4. Dimensions & Customization

 

Manufactured to marine engineering standards with enhanced corrosion allowances:

Parameter Standard Range Precision Tolerance Custom Options
Outer Diameter 6-300 mm ±0.1% OD Oval/rectangular profiles
Wall Thickness 0.5-12 mm +10%/-5% WT Variable wall sections
Length 1-12 m +3mm/-0mm Coiled lengths 30m+
Straightness 1mm/m max. ±0.3mm/m
Ovality ≤1.0% TIR ≤0.3% TIR
Bend Radius (min) 1.5× OD ±5% Tight radius: 0.75× OD

Fabrication Capabilities:

CNC rotary draw bending (up to 180° bends)

Hydroforming for complex cross-sections

Expanded ends for tube-to-tube joining

Thread rolling per ASME B1.20.1

 

5. Corrosion Resistance Properties

 

Environmental Performance Ratings

Environment ISO 9223 Rating Corrosion Rate (μm/yr) Protection Recommendation
Marine Offshore RC5 (Excellent) <5 μm/yr MIL-PRF-85582 marine coat
Chemical Process RC4 (Good) 8-20 μm/yr PVDF lining
Coastal Atmosphere RC4 (Good) 5-15 μm/yr Anodize Type IIB
Deicing Salt Exposure RC4 (Good) 10-25 μm/yr Ceramic-epoxy coating

 

Protection Systems:

Anodizing:

Type IIB (hard coat): 25-75μm thickness

Chromic acid (Type I): 5-8μm for thin walls

Coatings:

Fluoropolymer systems (PVDF): 30-50μm DFT (30-year warranty)

Ceramic-modified epoxies: 200μm DFT

Thermal spray aluminum (TSA): 150μm arc-sprayed layer

Galvanic Isolation: Dielectric unions for dissimilar metal connections

 

6. Machinability Characteristics

 

Optimization Parameters

Operation Tool Material Speed (m/min) Feed (mm/rev) Notes
Turning Carbide K01 300-500 0.20-0.40 Positive rake geometries
Milling Carbide K10 400-600 0.10-0.20 6-flute end mills preferred
Drilling TiN Coated 70-100 0.05-0.12 118° point angle
Tapping HSS-Co8 15-25 Pitch matched 85% thread depth

 

Performance Metrics:

Machinability index: 80% (baseline: 2011-T3=100%)

Surface roughness: Ra 0.4μm achievable

Built-up edge resistance: Class 3 (ISO 3685)

Chip formation: Continuous chips requiring breakers

Coolant recommendation: 7-10% emulsion concentration

 

7. Weldability & Joining Methods

 

Exceptional Fusion Weldability
GTAW and GMAW approved per AWS D1.2 procedures:

Gas Tungsten Arc Welding (GTAW)

Filler wire: ER5356 (AlMg5Cr) or ER5556

Shielding gas: Ar +25-30% He mixture

Heat input: <1.2 kJ/mm

Interpass temp: <100°C

Tube-to-Tube Joining

Orbital Welding:

Rotation speed: 4-10 RPM

Current pulsation: 150Hz with 40% background

Brazing:

Aluminum-silicon filler: BAISi-4 (4047 alloy)

Torch temperature: 590-620°C

Mechanical Connections:

Swagelok fittings: Up to 400bar working pressure

Victaulic grooved couplings: Size range 15-300mm

 

8. Physical Properties

 

Property Value Test Standard
Density 2.68 g/cm³ ASTM B311
Thermal Conductivity (25°C) 138 W/m·K ASTM E1461
CTE (20-100°C) 23.8 μm/m·°C ASTM E228
Electrical Resistivity 47 nΩ·m ASTM B193
Modulus of Elasticity 70.3 GPa ASTM E111
Magnetic Permeability 1.02 μH/m ASTM A342
Sound Velocity 5150 m/s ASTM E494
Emissivity (100°C) 0.10 (polished) ASTM C835
Reflectivity (visible) 75-85% ASTM E903

 

9. Surface Quality Standards

 

Seamless (ASTM B210) or welded (ASTM B491) construction

Surface finishes:

Mill finish: Ra 0.5-1.5μm

Smooth finish: Ra 0.2-0.5μm (for sanitary applications)

Mirror polish: Ra <0.025μm achievable

Defect classification (EN 10246-14):

Scratches: ≤0.03mm depth

Die lines: ≤0.1% OD

Inclusion size: ≤0.2mm

No visible seam on welded tubes

Cleaning protocols:

Electropolishing per ASTM B912

Degreasing to AMS 2658 Class D

 

10. Certifications & Testing

 

Non-Destructive Testing

Eddy Current: ASTM E309 with 0.25mm sensitivity

Hydrostatic: 1.5× design pressure for 60 seconds

Helium Leak Testing: <10⁻⁶ mbar·L/s sensitivity

Ultrasonic Wall Measurement: ±0.01mm resolution

Material Certifications

NORSOK M650 approved for offshore applications

PED 2014/68/EU Annex I compliance

FDA CFR 21.177.1500 for food contact

AD2000-Merkblatt HP0 approved for pressure vessels

Lloyd’s Register Type Approval Certificate

Marine Applications: Hull penetrations, railings, masts, heat exchangers, fuel lines, and desalination components where seawater corrosion resistance is paramount.

Packaging: VCI foam-end caps + shrink-wrap bundles, wooden crates with polyethylene moisture barrier. Standard lead time: 4 weeks for stocked sizes.

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