Property | Value
Mass Density, ρ (g/cm³) | 2.70
Mass per Meter, m (kg/m) | 1.7756
Moment of Inertia, Iₓ / Iᵧ (mm⁴) | 95,447.74
Section Modulus, Zₓ / Zᵧ (mm³) | 4,772.39
Radius of Gyration, rₓ / rᵧ (mm) | 12.05                                                                                                                          

4040 "SG-Series"645HD

Pros:

• Heavy-Duty Mass: High overall mass density provides excellent damping for localized impacts and high-vibration machinery.
• Thick Outer Slot Lips: Generous material thickness around the T-slot channels offers resistance against thread stripping or channel deformation under extreme point clamping loads.
• Standard Fitment: Compatible with all standard 40-series T-slot hardware, brackets, and accessories.

Cons:

• Excess Dead Weight: At 1.7756 kg/m, it adds significant dead load on long horizontal spans without providing proportional bending stiffness.
• Higher Cost: Increased cross-sectional area (657.62 mm²) means more aluminum volume per meter, driving up raw material and freight expenses.

Typical Applications:

• Fixed structural machine bases and heavy-duty static workbenches.
• High-impact industrial enclosures where frame mass helps absorb mechanical vibration.

Why Choose This Profile? Choose the Baseline Section when your primary build requirement is raw structural mass to dampen machine vibration, or when maximum local aluminum thickness around the T-slot tracking is needed for heavy, concentrated bracket clamping.