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S40910 Stainless Steel vs. ACI-ASTM CF8C Steel

Both S40910 stainless steel and ACI-ASTM CF8C 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 (2, in this case) are not shown.

For each property being compared, the top bar is S40910 stainless steel and the bottom bar is ACI-ASTM CF8C steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
150
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 23
40
Fatigue Strength, MPa 130
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 430
530
Tensile Strength: Yield (Proof), MPa 190
260

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 440
490
Maximum Temperature: Mechanical, °C 710
980
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 26
16
Thermal Expansion, µm/m-K 10
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.0
3.7
Embodied Energy, MJ/kg 28
53
Embodied Water, L/kg 94
150

Common Calculations

PREN (Pitting Resistance) 11
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 80
180
Resilience: Unit (Modulus of Resilience), kJ/m3 94
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 16
19
Strength to Weight: Bending, points 16
19
Thermal Diffusivity, mm2/s 6.9
4.3
Thermal Shock Resistance, points 16
11

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.080
Chromium (Cr), % 10.5 to 11.7
18 to 21
Iron (Fe), % 85 to 89.5
61.8 to 73
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 0 to 0.5
9.0 to 12
Niobium (Nb), % 0 to 0.17
0 to 1.0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040
Titanium (Ti), % 0 to 0.5
0