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EN 1.3955 Stainless Steel vs. ACI-ASTM CK3MCuN Steel

Both EN 1.3955 stainless steel and ACI-ASTM CK3MCuN steel are iron alloys. They have 83% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is EN 1.3955 stainless steel and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
39
Fatigue Strength, MPa 150
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 520
620
Tensile Strength: Yield (Proof), MPa 220
290

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 410
420
Maximum Temperature: Mechanical, °C 930
1090
Melting Completion (Liquidus), °C 1430
1460
Melting Onset (Solidus), °C 1380
1350
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 15
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.7
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 16
29
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.2
5.6
Embodied Energy, MJ/kg 45
76
Embodied Water, L/kg 140
190

Common Calculations

PREN (Pitting Resistance) 19
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
200
Resilience: Unit (Modulus of Resilience), kJ/m3 130
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
21
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 4.1
3.2
Thermal Shock Resistance, points 15
14

Alloy Composition

Carbon (C), % 0 to 0.15
0 to 0.025
Chromium (Cr), % 16.5 to 18.5
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 65.5 to 73.5
49.5 to 56.3
Manganese (Mn), % 0 to 2.0
0 to 1.2
Molybdenum (Mo), % 0 to 0.75
6.0 to 7.0
Nickel (Ni), % 10 to 12
17.5 to 19.5
Nitrogen (N), % 0
0.18 to 0.24
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.010