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ACI-ASTM CK3MCuN Steel vs. S38815 Stainless Steel

Both ACI-ASTM CK3MCuN steel and S38815 stainless steel are iron alloys. They have 85% 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 ACI-ASTM CK3MCuN steel and the bottom bar is S38815 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
190
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 39
34
Fatigue Strength, MPa 250
230
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 80
74
Tensile Strength: Ultimate (UTS), MPa 620
610
Tensile Strength: Yield (Proof), MPa 290
290

Thermal Properties

Latent Heat of Fusion, J/g 300
370
Maximum Temperature: Corrosion, °C 420
400
Maximum Temperature: Mechanical, °C 1090
860
Melting Completion (Liquidus), °C 1460
1360
Melting Onset (Solidus), °C 1350
1310
Specific Heat Capacity, J/kg-K 460
500
Thermal Expansion, µm/m-K 16
15

Otherwise Unclassified Properties

Base Metal Price, % relative 29
19
Density, g/cm3 8.0
7.5
Embodied Carbon, kg CO2/kg material 5.6
3.8
Embodied Energy, MJ/kg 76
54
Embodied Water, L/kg 190
140

Common Calculations

PREN (Pitting Resistance) 45
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200
170
Resilience: Unit (Modulus of Resilience), kJ/m3 210
220
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21
22
Strength to Weight: Bending, points 20
21
Thermal Shock Resistance, points 14
15

Alloy Composition

Aluminum (Al), % 0
0 to 0.3
Carbon (C), % 0 to 0.025
0 to 0.030
Chromium (Cr), % 19.5 to 20.5
13 to 15
Copper (Cu), % 0.5 to 1.0
0.75 to 1.5
Iron (Fe), % 49.5 to 56.3
56.1 to 67
Manganese (Mn), % 0 to 1.2
0 to 2.0
Molybdenum (Mo), % 6.0 to 7.0
0.75 to 1.5
Nickel (Ni), % 17.5 to 19.5
13 to 17
Nitrogen (N), % 0.18 to 0.24
0
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 1.0
5.5 to 6.5
Sulfur (S), % 0 to 0.010
0 to 0.020