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EN 1.4938 Stainless Steel vs. ACI-ASTM CK3MCuN Steel

Both EN 1.4938 stainless steel and ACI-ASTM CK3MCuN steel are iron alloys. They have 70% 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 1.4938 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, % 16 to 17
39
Fatigue Strength, MPa 390 to 520
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
80
Tensile Strength: Ultimate (UTS), MPa 870 to 1030
620
Tensile Strength: Yield (Proof), MPa 640 to 870
290

Thermal Properties

Latent Heat of Fusion, J/g 270
300
Maximum Temperature: Corrosion, °C 390
420
Maximum Temperature: Mechanical, °C 750
1090
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1420
1350
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 30
12
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.3
2.1

Otherwise Unclassified Properties

Base Metal Price, % relative 10
29
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.3
5.6
Embodied Energy, MJ/kg 47
76
Embodied Water, L/kg 110
190

Common Calculations

PREN (Pitting Resistance) 18
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 160
200
Resilience: Unit (Modulus of Resilience), kJ/m3 1050 to 1920
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 31 to 37
21
Strength to Weight: Bending, points 26 to 29
20
Thermal Diffusivity, mm2/s 8.1
3.2
Thermal Shock Resistance, points 30 to 35
14

Alloy Composition

Carbon (C), % 0.080 to 0.15
0 to 0.025
Chromium (Cr), % 11 to 12.5
19.5 to 20.5
Copper (Cu), % 0
0.5 to 1.0
Iron (Fe), % 80.5 to 84.8
49.5 to 56.3
Manganese (Mn), % 0.4 to 0.9
0 to 1.2
Molybdenum (Mo), % 1.5 to 2.0
6.0 to 7.0
Nickel (Ni), % 2.0 to 3.0
17.5 to 19.5
Nitrogen (N), % 0.020 to 0.040
0.18 to 0.24
Phosphorus (P), % 0 to 0.025
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010
Vanadium (V), % 0.25 to 0.4
0