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AISI 439 Stainless Steel vs. SAE-AISI 1039 Steel

Both AISI 439 stainless steel and SAE-AISI 1039 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 AISI 439 stainless steel and the bottom bar is SAE-AISI 1039 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
180 to 200
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
14 to 18
Fatigue Strength, MPa 170
230 to 370
Poisson's Ratio 0.28
0.29
Reduction in Area, % 51
40 to 45
Shear Modulus, GPa 77
73
Shear Strength, MPa 310
380 to 420
Tensile Strength: Ultimate (UTS), MPa 490
610 to 690
Tensile Strength: Yield (Proof), MPa 250
340 to 580

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 890
400
Melting Completion (Liquidus), °C 1510
1460
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
51
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
7.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
8.1

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
1.8
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
1.4
Embodied Energy, MJ/kg 34
18
Embodied Water, L/kg 120
46

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
88 to 94
Resilience: Unit (Modulus of Resilience), kJ/m3 160
310 to 890
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
22 to 24
Strength to Weight: Bending, points 18
20 to 22
Thermal Diffusivity, mm2/s 6.7
14
Thermal Shock Resistance, points 16
19 to 22

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0.37 to 0.44
Chromium (Cr), % 17 to 19
0
Iron (Fe), % 77.1 to 82.8
98.5 to 98.9
Manganese (Mn), % 0 to 1.0
0.7 to 1.0
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