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AISI 439 Stainless Steel vs. ACI-ASTM CE8MN Steel

Both AISI 439 stainless steel and ACI-ASTM CE8MN steel are iron alloys. They have 81% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is ACI-ASTM CE8MN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
29
Fatigue Strength, MPa 170
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 490
750
Tensile Strength: Yield (Proof), MPa 250
500

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 530
440
Maximum Temperature: Mechanical, °C 890
1100
Melting Completion (Liquidus), °C 1510
1440
Melting Onset (Solidus), °C 1430
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
16
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
21
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.3
4.2
Embodied Energy, MJ/kg 34
58
Embodied Water, L/kg 120
180

Common Calculations

PREN (Pitting Resistance) 18
40
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
190
Resilience: Unit (Modulus of Resilience), kJ/m3 160
620
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
27
Strength to Weight: Bending, points 18
23
Thermal Diffusivity, mm2/s 6.7
4.2
Thermal Shock Resistance, points 16
21

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 17 to 19
22.5 to 25.5
Iron (Fe), % 77.1 to 82.8
56 to 66.4
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 0
3.0 to 4.5
Nickel (Ni), % 0 to 0.5
8.0 to 11
Nitrogen (N), % 0 to 0.030
0.1 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Titanium (Ti), % 0.2 to 1.1
0