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S31277 Stainless Steel vs. ACI-ASTM CK20 Steel

Both S31277 stainless steel and ACI-ASTM CK20 steel are iron alloys. They have 85% of their average alloy composition in common. There are 27 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is S31277 stainless steel and the bottom bar is ACI-ASTM CK20 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 45
37
Fatigue Strength, MPa 380
220
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
78
Tensile Strength: Ultimate (UTS), MPa 860
530
Tensile Strength: Yield (Proof), MPa 410
260

Thermal Properties

Latent Heat of Fusion, J/g 310
310
Maximum Temperature: Corrosion, °C 430
440
Maximum Temperature: Mechanical, °C 1100
1100
Melting Completion (Liquidus), °C 1460
1400
Melting Onset (Solidus), °C 1410
1430
Specific Heat Capacity, J/kg-K 460
480
Thermal Expansion, µm/m-K 16
15

Otherwise Unclassified Properties

Base Metal Price, % relative 36
25
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.7
4.4
Embodied Energy, MJ/kg 90
62
Embodied Water, L/kg 220
190

Common Calculations

PREN (Pitting Resistance) 51
26
Resilience: Ultimate (Unit Rupture Work), MJ/m3 320
160
Resilience: Unit (Modulus of Resilience), kJ/m3 410
170
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 29
19
Strength to Weight: Bending, points 25
19
Thermal Shock Resistance, points 19
13

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.2
Chromium (Cr), % 20.5 to 23
23 to 27
Copper (Cu), % 0.5 to 1.5
0
Iron (Fe), % 35.5 to 46.2
46.7 to 58
Manganese (Mn), % 0 to 3.0
0 to 2.0
Molybdenum (Mo), % 6.5 to 8.0
0 to 0.5
Nickel (Ni), % 26 to 28
19 to 22
Nitrogen (N), % 0.3 to 0.4
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 2.0
Sulfur (S), % 0 to 0.010
0 to 0.040