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K94200 Alloy vs. 7049 Aluminum

K94200 alloy belongs to the iron alloys classification, while 7049 aluminum belongs to the aluminum 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 K94200 alloy and the bottom bar is 7049 aluminum.

UNS K94200 (FeNi42, 1.3917) Low Expansion Alloy7049 Aluminum
Metric UnitsUS Customary Units

Mechanical Properties

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

Thermal Properties

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

Electrical Properties

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

Otherwise Unclassified Properties

Density, g/cm3 8.2
3.1

Common Calculations

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