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S32750 Stainless Steel vs. ACI-ASTM CK20 Steel

Both S32750 stainless steel and ACI-ASTM CK20 steel are iron alloys. They have 86% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is S32750 stainless steel and the bottom bar is ACI-ASTM CK20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
150
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 17
37
Fatigue Strength, MPa 360
220
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
78
Tensile Strength: Ultimate (UTS), MPa 860
530
Tensile Strength: Yield (Proof), MPa 590
260

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 450
440
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1450
1400
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
14
Thermal Expansion, µm/m-K 12
15

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 21
25
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
4.4
Embodied Energy, MJ/kg 56
62
Embodied Water, L/kg 180
190

Common Calculations

PREN (Pitting Resistance) 43
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
160
Resilience: Unit (Modulus of Resilience), kJ/m3 860
170
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31
19
Strength to Weight: Bending, points 26
19
Thermal Diffusivity, mm2/s 4.0
3.7
Thermal Shock Resistance, points 25
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.2
Chromium (Cr), % 24 to 26
23 to 27
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 58.1 to 66.8
46.7 to 58
Manganese (Mn), % 0 to 1.2
0 to 2.0
Molybdenum (Mo), % 3.0 to 5.0
0 to 0.5
Nickel (Ni), % 6.0 to 8.0
19 to 22
Nitrogen (N), % 0.24 to 0.32
0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Silicon (Si), % 0 to 0.8
0 to 2.0
Sulfur (S), % 0 to 0.020
0 to 0.040