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ACI-ASTM CK20 Steel vs. AISI 201 Stainless Steel

Both ACI-ASTM CK20 steel and AISI 201 stainless steel are iron alloys. They have 75% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is ACI-ASTM CK20 steel and the bottom bar is AISI 201 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
200 to 440
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 37
4.6 to 51
Fatigue Strength, MPa 220
280 to 600
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 78
77
Tensile Strength: Ultimate (UTS), MPa 530
650 to 1450
Tensile Strength: Yield (Proof), MPa 260
300 to 1080

Thermal Properties

Latent Heat of Fusion, J/g 310
280
Maximum Temperature: Corrosion, °C 440
410
Maximum Temperature: Mechanical, °C 1100
880
Melting Completion (Liquidus), °C 1400
1410
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 14
15
Thermal Expansion, µm/m-K 15
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.0
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.3
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 25
12
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 4.4
2.6
Embodied Energy, MJ/kg 62
38
Embodied Water, L/kg 190
140

Common Calculations

PREN (Pitting Resistance) 26
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
61 to 340
Resilience: Unit (Modulus of Resilience), kJ/m3 170
230 to 2970
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 19
23 to 52
Strength to Weight: Bending, points 19
22 to 37
Thermal Diffusivity, mm2/s 3.7
4.0
Thermal Shock Resistance, points 13
14 to 32

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.15
Chromium (Cr), % 23 to 27
16 to 18
Iron (Fe), % 46.7 to 58
67.5 to 75
Manganese (Mn), % 0 to 2.0
5.5 to 7.5
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 19 to 22
3.5 to 5.5
Nitrogen (N), % 0
0 to 0.25
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 2.0
0 to 1.0
Sulfur (S), % 0 to 0.040
0 to 0.030