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ACI-ASTM CD6MN Steel vs. S40930 Stainless Steel

Both ACI-ASTM CD6MN steel and S40930 stainless steel are iron alloys. They have 79% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CD6MN steel and the bottom bar is S40930 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 28
23
Fatigue Strength, MPa 370
130
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 80
75
Tensile Strength: Ultimate (UTS), MPa 730
430
Tensile Strength: Yield (Proof), MPa 510
190

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 450
460
Maximum Temperature: Mechanical, °C 1100
710
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
25
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 17
8.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.4
2.3
Embodied Energy, MJ/kg 48
32
Embodied Water, L/kg 170
94

Common Calculations

PREN (Pitting Resistance) 36
11
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
80
Resilience: Unit (Modulus of Resilience), kJ/m3 650
94
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26
16
Strength to Weight: Bending, points 23
16
Thermal Diffusivity, mm2/s 4.4
6.7
Thermal Shock Resistance, points 20
16

Alloy Composition

Carbon (C), % 0 to 0.060
0 to 0.030
Chromium (Cr), % 24 to 27
10.5 to 11.7
Iron (Fe), % 62.1 to 70.1
84.7 to 89.4
Manganese (Mn), % 0 to 1.0
0 to 1.0
Molybdenum (Mo), % 1.8 to 2.5
0
Nickel (Ni), % 4.0 to 6.0
0 to 0.5
Niobium (Nb), % 0
0.080 to 0.75
Nitrogen (N), % 0.15 to 0.25
0 to 0.030
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.020
Titanium (Ti), % 0
0.050 to 0.2