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Home > News & Blog > News > 6061 Aluminum Plate vs 6063 Aluminum Plate
6061 and 6063 aluminum plates are two aluminum alloy products with strong comprehensive performance. However, they exhibit significant differences in strength, machinability, and application scenarios. Flait Aluminum provides an in-depth analysis of the core characteristics of these two premium alloys to help you precisely match project requirements.
| Property | 6061 Aluminum Plate | 6063 Aluminum Plate |
| Main Alloys | Mg 1.0%, Si 0.6% + Cu 0.25% | Mg 0.7%, Si 0.4% (extremely low Cu content) |
| Processing | Requires strict solution heat treatment (T6 temper) | Air-cooled after extrusion (T5 temper) |
| Core Advantage | High strength + excellent machinability | Superior surface finish + extrusion fluidity |
Mechanical Properties (Typical T6 Temper)
| Parameter | 6061 Aluminum Plate | 6063 Aluminum Plate | Difference |
| Tensile Strength (MPa) | ≥310 | ≥215 | 44% |
| Yield Strength (MPa) | ≥275 | ≥180 | 53% |
| Elongation (%) | ≥12 | ≥12 | Equal |
| Hardness (HB) | 95 | 75 | 27% |
Functional Properties
| Property | 6061 Aluminum Plate | 6063 Aluminum Plate |
| Weldability | ⭐⭐⭐⭐ (Requires 4043 filler) | ⭐⭐⭐ (Low hot cracking sensitivity) |
| Anodizing Effect | ⭐⭐⭐ (Moderate uniformity) | ⭐⭐⭐⭐⭐ (Mirror-like finish) |
| Corrosion Resistance | ⭐⭐⭐⭐ (Marine-grade suitability) | ⭐⭐⭐⭐ |
| Extrusion Complexity | Suitable for simple cross-sections | Ideal for thin-wall/complex sections |
Preferred Applications for 6061 Aluminum Plate✅ High-Strength Structural Components
Robotic arm linkage plates (fatigue resistance)
Truck chassis brackets (impact load resistance)
Robot load-bearing frames (UTS ≥310 MPa)
✅ Precision Machined Parts
CNC-milled gearbox housings
Hydraulic valve blocks (high dimensional stability)
✅ Marine/Transportation Equipment
Ship gangway tread plates (seawater corrosion resistance)
High-speed rail seat frames (strength-to-weight optimization)
Preferred Applications for 6063 Aluminum Plate✅ Architectural Aesthetic Components
Curtain wall frameworks (uniform anodized surface)
Premium door/window profiles (complex extrusion shapes)
✅ Thermal Management Systems
LED heat sinks (thin-fin formation)
Electrical enclosures (thermal conductivity: 201 W/m·K)
✅ Decorative Products
Furniture handles (mirror-polished effect)
Display racks (bending radius ≥2R)
✅ Strength Threshold
Load-bearing >250 MPa → 6061 Aluminum Plate
Decorative structures → 6063 Aluminum Plate
✅ Surface Requirements
Class I anodizing → 6063 Aluminum Plate
Sandblasting/painting → 6061 Aluminum Plate (more economical)
✅ Processing Method
CNC milling/drilling → 6061 Aluminum Plate (easy chip control)
Complex extrusion → 6063 Aluminum Plate (flow advantage)
✅ Cost Sensitivity
High strength/lightweight → 6061 Aluminum Plate
Mass-produced profiles → 6063 Aluminum Plate (15%-20% cost reduction)
Flait Aluminum: Full-Solution Supplier for Premium Alloys
▶ Flagship 6061 Aluminum Plate Products
T651 thick plate (6-150mm)｜Marine deck applications
T6 precision thin plate (0.5-5mm)｜CNC machining substrate
▶ Core Advantages of 6063 Aluminum Plate
Ultra-flat extruded plate (flatness ≤0.3mm/m²)｜Curtain wall substrate
Custom T5/T6 tempers｜Heat sink specialization
🌟 Value-Added Services:
Alloy composition optimization (increase 6063 strength to 240MPa+)
6061 stress-relieving (prevents machining deformation)
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