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ACI-ASTM CK3MCuN Steel vs. S31277 Stainless Steel

Both ACI-ASTM CK3MCuN steel and S31277 stainless steel are iron alloys. They have 88% 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 ACI-ASTM CK3MCuN steel and the bottom bar is S31277 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 39
45
Fatigue Strength, MPa 250
380
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 80
80
Tensile Strength: Ultimate (UTS), MPa 620
860
Tensile Strength: Yield (Proof), MPa 290
410

Thermal Properties

Latent Heat of Fusion, J/g 300
310
Maximum Temperature: Corrosion, °C 420
430
Maximum Temperature: Mechanical, °C 1090
1100
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 460
460
Thermal Expansion, µm/m-K 16
16

Otherwise Unclassified Properties

Base Metal Price, % relative 29
36
Density, g/cm3 8.0
8.1
Embodied Carbon, kg CO2/kg material 5.6
6.7
Embodied Energy, MJ/kg 76
90
Embodied Water, L/kg 190
220

Common Calculations

PREN (Pitting Resistance) 45
51
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
320
Resilience: Unit (Modulus of Resilience), kJ/m3 210
410
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
29
Strength to Weight: Bending, points 20
25
Thermal Shock Resistance, points 14
19

Alloy Composition

Carbon (C), % 0 to 0.025
0 to 0.020
Chromium (Cr), % 19.5 to 20.5
20.5 to 23
Copper (Cu), % 0.5 to 1.0
0.5 to 1.5
Iron (Fe), % 49.5 to 56.3
35.5 to 46.2
Manganese (Mn), % 0 to 1.2
0 to 3.0
Molybdenum (Mo), % 6.0 to 7.0
6.5 to 8.0
Nickel (Ni), % 17.5 to 19.5
26 to 28
Nitrogen (N), % 0.18 to 0.24
0.3 to 0.4
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.010
0 to 0.010