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S15500 Stainless Steel vs. ACI-ASTM CF20 Steel

Both S15500 stainless steel and ACI-ASTM CF20 steel are iron alloys. They have 89% 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 S15500 stainless steel and the bottom bar is ACI-ASTM CF20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 290 to 430
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 6.8 to 16
50
Fatigue Strength, MPa 350 to 650
240
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
77
Tensile Strength: Ultimate (UTS), MPa 890 to 1490
530
Tensile Strength: Yield (Proof), MPa 590 to 1310
250

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 440
420
Maximum Temperature: Mechanical, °C 820
970
Melting Completion (Liquidus), °C 1430
1420
Melting Onset (Solidus), °C 1380
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 17
16
Thermal Expansion, µm/m-K 11
17

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 13
16
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.7
3.1
Embodied Energy, MJ/kg 39
44
Embodied Water, L/kg 130
150

Common Calculations

PREN (Pitting Resistance) 15
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98 to 120
220
Resilience: Unit (Modulus of Resilience), kJ/m3 890 to 4460
160
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 53
19
Strength to Weight: Bending, points 26 to 37
19
Thermal Diffusivity, mm2/s 4.6
4.3
Thermal Shock Resistance, points 30 to 50
11

Alloy Composition

Carbon (C), % 0 to 0.070
0 to 0.2
Chromium (Cr), % 14 to 15.5
18 to 21
Copper (Cu), % 2.5 to 4.5
0
Iron (Fe), % 71.9 to 79.9
64.2 to 74
Manganese (Mn), % 0 to 1.0
0 to 1.5
Nickel (Ni), % 3.5 to 5.5
8.0 to 11
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