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SAE-AISI 1080 Steel vs. AISI 439 Stainless Steel

Both SAE-AISI 1080 steel and AISI 439 stainless steel are iron alloys. They have 81% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 1080 steel and the bottom bar is AISI 439 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 220 to 260
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11
23
Fatigue Strength, MPa 300 to 360
170
Poisson's Ratio 0.29
0.28
Reduction in Area, % 28 to 45
51
Shear Modulus, GPa 72
77
Shear Strength, MPa 460 to 520
310
Tensile Strength: Ultimate (UTS), MPa 770 to 870
490
Tensile Strength: Yield (Proof), MPa 480 to 590
250

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Maximum Temperature: Mechanical, °C 400
890
Melting Completion (Liquidus), °C 1450
1510
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 51
25
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.6
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 11
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 1.8
9.0
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 1.4
2.3
Embodied Energy, MJ/kg 19
34
Embodied Water, L/kg 46
120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 80 to 84
95
Resilience: Unit (Modulus of Resilience), kJ/m3 610 to 920
160
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 27 to 31
18
Strength to Weight: Bending, points 24 to 26
18
Thermal Diffusivity, mm2/s 14
6.7
Thermal Shock Resistance, points 25 to 29
16

Alloy Composition

Aluminum (Al), % 0
0 to 0.15
Carbon (C), % 0.75 to 0.88
0 to 0.030
Chromium (Cr), % 0
17 to 19
Iron (Fe), % 98.1 to 98.7
77.1 to 82.8
Manganese (Mn), % 0.6 to 0.9
0 to 1.0
Nickel (Ni), % 0
0 to 0.5
Nitrogen (N), % 0
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0
0 to 1.0
Sulfur (S), % 0 to 0.050
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.1