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7049 Aluminum vs. K94200 Alloy

7049 aluminum belongs to the aluminum alloys classification, while K94200 alloy belongs to the iron alloys. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown. Please note that the two materials have significantly dissimilar densities. This means that additional care is required when interpreting the data, because some material properties are based on units of mass, while others are based on units of area or volume.

For each property being compared, the top bar is 7049 aluminum and the bottom bar is K94200 alloy.

7049 AluminumUNS K94200 (FeNi42, 1.3917) Low Expansion Alloy
Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 70
140
Elongation at Break, % 6.2 to 7.0
5.0 to 32
Poisson's Ratio 0.32
0.34
Shear Modulus, GPa 27
54
Shear Strength, MPa 300 to 310
330 to 410
Tensile Strength: Ultimate (UTS), MPa 510 to 530
500 to 710
Tensile Strength: Yield (Proof), MPa 420 to 450
270 to 650

Thermal Properties

Melting Onset (Solidus), °C 480
1440
Specific Heat Capacity, J/kg-K 860
500
Thermal Conductivity, W/m-K 130
15
Thermal Expansion, µm/m-K 23
5.0

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 36
2.7
Electrical Conductivity: Equal Weight (Specific), % IACS 110
3.0

Otherwise Unclassified Properties

Density, g/cm3 3.1
8.2

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 31 to 34
35 to 130
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 1440
250 to 1460
Stiffness to Weight: Axial, points 13
9.8
Stiffness to Weight: Bending, points 45
21
Strength to Weight: Axial, points 46 to 47
17 to 24
Strength to Weight: Bending, points 46 to 47
17 to 22
Thermal Diffusivity, mm2/s 51
3.7
Thermal Shock Resistance, points 22 to 23
49 to 70