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AISI 439 Stainless Steel vs. SAE-AISI 1008 Steel

Both AISI 439 stainless steel and SAE-AISI 1008 steel are iron alloys. They have 80% 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 AISI 439 stainless steel and the bottom bar is SAE-AISI 1008 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
93 to 100
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
22 to 33
Fatigue Strength, MPa 170
150 to 220
Poisson's Ratio 0.28
0.29
Reduction in Area, % 51
50 to 63
Shear Modulus, GPa 77
73
Shear Strength, MPa 310
220 to 230
Tensile Strength: Ultimate (UTS), MPa 490
330 to 370
Tensile Strength: Yield (Proof), MPa 250
190 to 310

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 890
400
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1430
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
62
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
6.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
7.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.8
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.3
1.4
Embodied Energy, MJ/kg 34
18
Embodied Water, L/kg 120
45

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
78 to 91
Resilience: Unit (Modulus of Resilience), kJ/m3 160
92 to 260
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
12 to 13
Strength to Weight: Bending, points 18
13 to 15
Thermal Diffusivity, mm2/s 6.7
17
Thermal Shock Resistance, points 16
10 to 12

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.1
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 77.1 to 82.8
99.31 to 99.7
Manganese (Mn), % 0 to 1.0
0.3 to 0.5
Nickel (Ni), % 0 to 0.5
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0
Sulfur (S), % 0 to 0.030
0 to 0.050
Titanium (Ti), % 0.2 to 1.1
0