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ACI-ASTM CF20 Steel vs. S17600 Stainless Steel

Both ACI-ASTM CF20 steel and S17600 stainless steel are iron alloys. They have a moderately high 94% 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 CF20 steel and the bottom bar is S17600 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
270 to 410
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 50
8.6 to 11
Fatigue Strength, MPa 240
300 to 680
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
76
Tensile Strength: Ultimate (UTS), MPa 530
940 to 1490
Tensile Strength: Yield (Proof), MPa 250
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 420
550
Maximum Temperature: Mechanical, °C 970
890
Melting Completion (Liquidus), °C 1420
1430
Melting Onset (Solidus), °C 1410
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
15
Thermal Expansion, µm/m-K 17
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 16
13
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.9
Embodied Energy, MJ/kg 44
42
Embodied Water, L/kg 150
130

Common Calculations

PREN (Pitting Resistance) 20
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
70 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 160
850 to 4390
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
34 to 54
Strength to Weight: Bending, points 19
28 to 37
Thermal Diffusivity, mm2/s 4.3
4.1
Thermal Shock Resistance, points 11
31 to 50

Alloy Composition

Aluminum (Al), % 0
0 to 0.4
Carbon (C), % 0 to 0.2
0 to 0.080
Chromium (Cr), % 18 to 21
16 to 17.5
Iron (Fe), % 64.2 to 74
71.3 to 77.6
Manganese (Mn), % 0 to 1.5
0 to 1.0
Nickel (Ni), % 8.0 to 11
6.0 to 7.5
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
Titanium (Ti), % 0
0.4 to 1.2