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AISI 205 Stainless Steel vs. ACI-ASTM CK20 Steel

Both AISI 205 stainless steel and ACI-ASTM CK20 steel are iron alloys. They have 73% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 205 stainless steel and the bottom bar is ACI-ASTM CK20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210 to 440
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 11 to 51
37
Fatigue Strength, MPa 410 to 640
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 800 to 1430
530
Tensile Strength: Yield (Proof), MPa 450 to 1100
260

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 410
440
Maximum Temperature: Mechanical, °C 880
1100
Melting Completion (Liquidus), °C 1380
1400
Melting Onset (Solidus), °C 1340
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 18
15

Otherwise Unclassified Properties

Base Metal Price, % relative 11
25
Density, g/cm3 7.6
7.8
Embodied Carbon, kg CO2/kg material 2.6
4.4
Embodied Energy, MJ/kg 37
62
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 23
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 150 to 430
160
Resilience: Unit (Modulus of Resilience), kJ/m3 510 to 3060
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 26
25
Strength to Weight: Axial, points 29 to 52
19
Strength to Weight: Bending, points 25 to 37
19
Thermal Shock Resistance, points 16 to 29
13

Alloy Composition

Carbon (C), % 0.12 to 0.25
0 to 0.2
Chromium (Cr), % 16.5 to 18.5
23 to 27
Iron (Fe), % 62.6 to 68.1
46.7 to 58
Manganese (Mn), % 14 to 15.5
0 to 2.0
Molybdenum (Mo), % 0
0 to 0.5
Nickel (Ni), % 1.0 to 1.7
19 to 22
Nitrogen (N), % 0.32 to 0.4
0
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040