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ACI-ASTM CF8M Steel vs. S31260 Stainless Steel

Both ACI-ASTM CF8M steel and S31260 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF8M steel and the bottom bar is S31260 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
260
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
23
Fatigue Strength, MPa 280
370
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 540
790
Tensile Strength: Yield (Proof), MPa 290
540

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
450
Maximum Temperature: Mechanical, °C 1000
1100
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
16
Thermal Expansion, µm/m-K 16
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 19
20
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.8
3.9
Embodied Energy, MJ/kg 53
53
Embodied Water, L/kg 160
180

Common Calculations

PREN (Pitting Resistance) 28
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
160
Resilience: Unit (Modulus of Resilience), kJ/m3 210
720
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
28
Strength to Weight: Bending, points 19
24
Thermal Diffusivity, mm2/s 4.3
4.3
Thermal Shock Resistance, points 12
22

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.030
Chromium (Cr), % 18 to 21
24 to 26
Copper (Cu), % 0
0.2 to 0.8
Iron (Fe), % 60.3 to 71
59.6 to 67.6
Manganese (Mn), % 0 to 1.5
0 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
2.5 to 3.5
Nickel (Ni), % 9.0 to 12
5.5 to 7.5
Nitrogen (N), % 0
0.1 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0 to 0.75
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
0.1 to 0.5