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ACI-ASTM CF8M Steel vs. N08700 Stainless Steel

Both ACI-ASTM CF8M steel and N08700 stainless 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 (3, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CF8M steel and the bottom bar is N08700 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
32
Fatigue Strength, MPa 280
210
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
79
Tensile Strength: Ultimate (UTS), MPa 540
620
Tensile Strength: Yield (Proof), MPa 290
270

Thermal Properties

Latent Heat of Fusion, J/g 300
300
Maximum Temperature: Corrosion, °C 420
460
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
470
Thermal Conductivity, W/m-K 16
13
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 19
32
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 3.8
6.0
Embodied Energy, MJ/kg 53
82
Embodied Water, L/kg 160
200

Common Calculations

PREN (Pitting Resistance) 28
36
Resilience: Ultimate (Unit Rupture Work), MJ/m3 230
160
Resilience: Unit (Modulus of Resilience), kJ/m3 210
180
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
21
Strength to Weight: Bending, points 19
20
Thermal Diffusivity, mm2/s 4.3
3.5
Thermal Shock Resistance, points 12
14

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.040
Chromium (Cr), % 18 to 21
19 to 23
Copper (Cu), % 0
0 to 0.5
Iron (Fe), % 60.3 to 71
42 to 52.7
Manganese (Mn), % 0 to 1.5
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
4.3 to 5.0
Nickel (Ni), % 9.0 to 12
24 to 26
Niobium (Nb), % 0
0 to 0.4
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030