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ACI-ASTM CK20 Steel vs. N08028 Stainless Steel

Both ACI-ASTM CK20 steel and N08028 stainless steel are iron alloys. They have 82% of their average alloy composition in common. There are 30 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 ACI-ASTM CK20 steel and the bottom bar is N08028 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 37
45
Fatigue Strength, MPa 220
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 530
570
Tensile Strength: Yield (Proof), MPa 260
240

Thermal Properties

Latent Heat of Fusion, J/g 310
320
Maximum Temperature: Corrosion, °C 440
460
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1400
1420
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 14
12
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Base Metal Price, % relative 25
37
Density, g/cm3 7.8
8.1
Embodied Carbon, kg CO2/kg material 4.4
6.4
Embodied Energy, MJ/kg 62
89
Embodied Water, L/kg 190
240

Common Calculations

PREN (Pitting Resistance) 26
39
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
210
Resilience: Unit (Modulus of Resilience), kJ/m3 170
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 19
19
Strength to Weight: Bending, points 19
19
Thermal Diffusivity, mm2/s 3.7
3.2
Thermal Shock Resistance, points 13
12

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 23 to 27
26 to 28
Copper (Cu), % 0
0.6 to 1.4
Iron (Fe), % 46.7 to 58
29 to 40.4
Manganese (Mn), % 0 to 2.0
0 to 2.5
Molybdenum (Mo), % 0 to 0.5
3.0 to 4.0
Nickel (Ni), % 19 to 22
30 to 34
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030