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S21603 Stainless Steel vs. ACI-ASTM CK20 Steel

Both S21603 stainless steel and ACI-ASTM CK20 steel are iron alloys. They have 80% of their average alloy composition in common. There are 28 material properties with values for both materials. Properties with values for just one material (7, in this case) are not shown.

For each property being compared, the top bar is S21603 stainless steel and the bottom bar is ACI-ASTM CK20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 200
150
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 45
37
Fatigue Strength, MPa 360
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 690
530
Tensile Strength: Yield (Proof), MPa 390
260

Thermal Properties

Latent Heat of Fusion, J/g 290
310
Maximum Temperature: Corrosion, °C 420
440
Maximum Temperature: Mechanical, °C 990
1100
Melting Completion (Liquidus), °C 1420
1400
Melting Onset (Solidus), °C 1380
1430
Specific Heat Capacity, J/kg-K 480
480
Thermal Expansion, µm/m-K 17
15

Otherwise Unclassified Properties

Base Metal Price, % relative 17
25
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.6
4.4
Embodied Energy, MJ/kg 50
62
Embodied Water, L/kg 160
190

Common Calculations

PREN (Pitting Resistance) 34
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 270
160
Resilience: Unit (Modulus of Resilience), kJ/m3 380
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25
19
Strength to Weight: Bending, points 22
19
Thermal Shock Resistance, points 15
13

Alloy Composition

Carbon (C), % 0 to 0.030
0 to 0.2
Chromium (Cr), % 17.5 to 22
23 to 27
Iron (Fe), % 57.6 to 67.8
46.7 to 58
Manganese (Mn), % 7.5 to 9.0
0 to 2.0
Molybdenum (Mo), % 2.0 to 3.0
0 to 0.5
Nickel (Ni), % 5.0 to 7.0
19 to 22
Nitrogen (N), % 0.25 to 0.5
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 2.0
Sulfur (S), % 0 to 0.030
0 to 0.040