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S17400 Stainless Steel vs. ACI-ASTM CF8M Steel

Both S17400 stainless steel and ACI-ASTM CF8M steel are iron alloys. They have 87% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is S17400 stainless steel and the bottom bar is ACI-ASTM CF8M steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 280 to 440
170
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 11 to 21
50
Fatigue Strength, MPa 380 to 670
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 910 to 1390
540
Tensile Strength: Yield (Proof), MPa 580 to 1250
290

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 450
420
Maximum Temperature: Mechanical, °C 850
1000
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.3
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.6
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 14
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.7
3.8
Embodied Energy, MJ/kg 39
53
Embodied Water, L/kg 130
160

Common Calculations

PREN (Pitting Resistance) 16
28
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
230
Resilience: Unit (Modulus of Resilience), kJ/m3 880 to 4060
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 49
19
Strength to Weight: Bending, points 27 to 35
19
Thermal Diffusivity, mm2/s 4.5
4.3
Thermal Shock Resistance, points 30 to 46
12

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.080
Chromium (Cr), % 15 to 17
18 to 21
Copper (Cu), % 3.0 to 5.0
0
Iron (Fe), % 70.4 to 78.9
60.3 to 71
Manganese (Mn), % 0 to 1.0
0 to 1.5
Molybdenum (Mo), % 0
2.0 to 3.0
Nickel (Ni), % 3.0 to 5.0
9.0 to 12
Niobium (Nb), % 0.15 to 0.45
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 0.030
0 to 0.040