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ACI-ASTM CK20 Steel vs. S35315 Stainless Steel

Both ACI-ASTM CK20 steel and S35315 stainless steel are iron alloys. They have 85% 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 ACI-ASTM CK20 steel and the bottom bar is S35315 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 37
46
Fatigue Strength, MPa 220
280
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
78
Tensile Strength: Ultimate (UTS), MPa 530
740
Tensile Strength: Yield (Proof), MPa 260
300

Thermal Properties

Latent Heat of Fusion, J/g 310
330
Maximum Temperature: Corrosion, °C 440
450
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1400
1370
Melting Onset (Solidus), °C 1430
1330
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
12
Thermal Expansion, µm/m-K 15
16

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 25
34
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.4
5.7
Embodied Energy, MJ/kg 62
81
Embodied Water, L/kg 190
220

Common Calculations

PREN (Pitting Resistance) 26
27
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
270
Resilience: Unit (Modulus of Resilience), kJ/m3 170
230
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
26
Strength to Weight: Bending, points 19
23
Thermal Diffusivity, mm2/s 3.7
3.1
Thermal Shock Resistance, points 13
17

Alloy Composition

Carbon (C), % 0 to 0.2
0.040 to 0.080
Cerium (Ce), % 0
0.030 to 0.1
Chromium (Cr), % 23 to 27
24 to 26
Iron (Fe), % 46.7 to 58
33.6 to 40.6
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 19 to 22
34 to 36
Nitrogen (N), % 0
0.12 to 0.18
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 2.0
1.2 to 2.0
Sulfur (S), % 0 to 0.040
0 to 0.030