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5083 H116 Aluminum Plate

It is the most widely used anti rust aluminum alloy, which has high strength, especially fatigue resistance: high plasticity and corrosion resistance, cannot be strengthened by heat treatment, good plasticity during semi cold work hardening, low plasticity during cold work hardening, good corrosion resistance, good weldability, poor machinability, and can be polished.

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1. Material Composition & Manufacturing Process

5083 aluminum alloy (ASTM B209, EN 485, AMS 4027) is a non-heat-treatable Al-Mg alloy designed for extreme corrosion resistance and weldability. The H116 temper provides optimal combination of strength and stress corrosion resistance:

Alloy Chemistry:

Magnesium (Mg): 4.0-4.9% (solid solution strengthening)

Manganese (Mn): 0.4-1.0% (grain refinement)

Chromium (Cr): 0.05-0.25% (corrosion resistance)

Iron (Fe): ≤0.40% max

Silicon (Si): ≤0.40% max

Base Material:

Aluminum (Al): ≥94.5% (balance)

Controlled Impurities:

Copper (Cu): ≤0.10% max

Zinc (Zn): ≤0.25% max

Titanium (Ti): ≤0.15% max

Advanced Manufacturing Process:

Direct Chill Casting: 680-720°C melt temperature

Homogenization: 550°C for 8-10 hours

Hot Rolling: Reduction at 400-450°C

Controlled Cooling: Special cooling rate <100°C/min

Stabilization Treatment: 150-180°C for 2-3 hours (H116 specific)

Cold Rolling: Limited reduction <15% for surface quality

Stress Leveling: Tension leveling for flatness

Certified to DNV, ABS, and Lloyds Register marine standards with full material traceability.

2. Mechanical Properties of H116 Temper State

Property	Minimum	Typical	Test Standard	Marine Application Significance
Ultimate Tensile Strength	275 MPa	300-340 MPa	ASTM B557	Exceeds marine structure requirements
Yield Strength (Rp0.2)	175 MPa	215-230 MPa	ASTM B557	Retains strength at low temperatures
Elongation (50mm gauge)	12%	16-20%	ASTM B557	Excellent ductility for forming
Shear Strength	185 MPa	210-230 MPa	ASTM B831	70% of tensile strength
Compressive Yield	175 MPa	200-215 MPa	ASTM E9	Hull structure integrity
Fatigue Strength (10⁷)	120 MPa	140 MPa	ASTM E466	Superior in saline environments
Hardness (Brinell)	75 HB	85 HB	ASTM E10	Consistent through thickness
Impact Toughness (-20°C)	25 J	30 J	ASTM E23	Arctic operation capability
Fracture Toughness	40 MPa√m	45 MPa√m	ASTM E399	Critical crack tolerance

3. Microstructure Control & Stabilization

H116 Specific Processing:

Cold Work Reduction: 10-15% maximum

Stabilization Treatment:

Temperature: 150-180°C

Duration: 2-3 hours

Cooling: Controlled air cooling

Purpose:

Prevent β-phase precipitation (Al₃Mg₂)

Maintain corrosion resistance

Stabilize mechanical properties

Microstructural Characteristics:

Grain Size: ASTM 5-6 (40-60μm)

Intermetallic Phases:

Al₆(Mn,Fe) dispersoids

Fine β-phase inhibited

Dislocation Density: 1-2×10¹⁰/cm²

Textures: Weak rolling texture

Recrystallization Fraction: 80-90%

Phase Distribution: Uniform solute distribution

Stress corrosion resistance exceeds standard H321 temper by 30-40%.

4. Dimensional Specifications & Tolerances

Parameter	Standard Range	Marine Tolerance	Commercial Tolerance
Thickness	3-150 mm	±0.5%	±1%
Width	1500-3500 mm	±5 mm	±15 mm
Length	3000-16000 mm	+10/-0 mm	+25/-0 mm
Flatness	N/A	3 mm/m max	7 mm/m max
Camber	N/A	1 mm/m max	5 mm/m max
Edge Condition	Sheared	Machined edge	Plasma cut
Surface Roughness	1.2-2.5 μm Ra	0.8 μm Ra	3.0 μm Ra

Special Capabilities:

Oversize Plates: Up to 4500mm wide × 20000mm long

Ultrasonic Testing: Full plate scanning per ASTM B209

Weight Formula: Thickness(mm) × Width(m) × Length(m) × 2.66 = Weight(kg)

5. Corrosion Resistance Performance

Environment	Performance	Corrosion Rate	Industry Standard	Protection Methods
Marine Immersion	Excellent	<0.001 mm/yr	ASTM G50	None required
Splash Zone	Excellent	0.002-0.004 mm/yr	NORSOK M001	Anodizing
Industrial Atmosphere	Excellent	0.003-0.005 mm/yr	ISO 9223	Powder coating
Seawater Cavitation	Good	<0.05 mm/yr	ASTM G32	HVOF coating
Stress Corrosion	Excellent	No SCC at yield	ASTM G47	None required
Galvanic Compatibility	Good	Low bimetallic current	ISO 8081	Insulation kits

Surface Treatment Options:

Marine Grade Anodizing: 25-50μm

Thermal Spray Aluminum (TSA): 150-300μm

Marine Paint Systems: Epoxy/coal tar combinations

Stainless Steel Cladding: Explosive bonding

Chemical Conversion: Chromate-free technologies

6. Machining & Fabrication Properties

Operation	Tool Material	Recommended Parameters	Marine Application Notes
Plasma Cutting	Hafnium electrodes	400-600A, 100-250 IPM	Weld prep ready
Waterjet Cutting	Garnet abrasive	0.8-1.2 kg/min, 300 mm/min	No HAZ distortion
Drilling	Carbide drills	Vc=60-100 m/min, fn=0.15 mm/rev	Self-lubricating design
Milling	PCD inserts	Vc=1000-1500 m/min	High surface finish
Forming	Press brakes	Min radius 3t (t=thickness)	Cold forming capability

Fabrication Advantages:

Weldability: Excellent without preheat

Cold Working Capability: Up to 15% strain

Repair Welding: No degradation

Formability: Excellent in annealed state

Grindability: Low tool wear

Polishing: Accepts mirror finish

7. Welding & Joining Technologies

Recommended Welding Processes:

Gas Metal Arc Welding (GMAW):

Wire: ER5183, ER5356 or ER5556

Shielding: Argon or Ar/He mixtures

Friction Stir Welding (FSW):

Parameters: 600-800 RPM, 150-300 mm/min

Strength Ratio: 85-95% of base metal

Laser Welding:

Power: 4-8 kW fiber laser

Speed: 2.5-5 m/min

Stud Welding:

Capacitor discharge type

Joint Design Specifications:

Butt Joints: 60-70° included angle

Fillet Welds: 6mm min leg length

Double-Sided Welds: Preferred for >10mm thickness

Interpass Temperature: <90°C maintained

8. Physical Properties for Marine Design

Property	Value	Marine Application Significance
Density	2.66 g/cm³	Buoyancy calculations
Melting Range	570-640°C	Fire safety margins
Thermal Conductivity	117 W/m·K	Heat exchanger applications
Electrical Conductivity	29% IACS	Shipboard electrical systems
Specific Heat Capacity	900 J/kg·K	Thermal management in engines
Young's Modulus	70 GPa	Structural stiffness
CTE (20-100°C)	23.8 ×10⁻⁶/K	Expansion joint design
Magnetic Permeability	1.000022	Degaussing compatibility
Thermal Neutron Cross-Section	0.22 barns	Nuclear marine applications

9. Quality Control & Certification

Testing Protocol:

Chemical Analysis: OES for each melt

Mechanical Testing: Each plate tested

Corrosion Testing:

ASTM G67: Nitric acid mass loss test

ASTM G66: ASSET test for β-phase

EXCO test per ASTM G34

NDT Methods:

Ultrasonic per ASTM B594 Level A

Radiography for weldments

Leak testing for tanks

Macro/Micro Examination: Grain structure analysis

International Certifications:

Marine Classifications: ABS, DNV, LR, BV

Pressure Vessel Codes: ASME Section VIII

Offshore Standards: NORSOK M-120/M-121

Military Specs: MIL-DTL-24441

International Standards: EN 1090 EXC3/4

Welding Certifications: ISO 3834-2

NACE Compliance: MR0175/ISO 15156

10. Industrial Applications & Handling

Primary Marine Applications:

Ship hulls and superstructures

Offshore platform decks

LNG carrier containment

Ballast water tanks

Submarine pressure hulls

Helicopter landing decks

Marine riser systems

Desalination plant components

Handling & Storage Protocol:

Storage Temperature: 10-40°C

Humidity Control: <60% RH

Stacking Requirements:

Wood spacers every 500mm

Stack height limit: 1.2 meters

Surface Protection:

UV-resistant PE film

VCI paper interleaving

Lifting Equipment:

Wide pad vacuum lifters

Non-magnetic spreader beams

Edge protection sleeves

Transportation Specifications:

Seaworthy packaging

Desiccant units in containers

ISO container compatibility

Weatherproof covering

Specialized cradle systems

Shock indicators for sensitive parts

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