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EN 1.4640 Stainless Steel vs. ACI-ASTM CK3MCuN Steel

Both EN 1.4640 stainless steel and ACI-ASTM CK3MCuN steel are iron alloys. They have 79% of their average alloy composition in common. There are 32 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is EN 1.4640 stainless steel and the bottom bar is ACI-ASTM CK3MCuN steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190 to 200
180
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 51
39
Fatigue Strength, MPa 230 to 250
250
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 620 to 650
620
Tensile Strength: Yield (Proof), MPa 240 to 260
290

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 420
420
Maximum Temperature: Mechanical, °C 930
1090
Melting Completion (Liquidus), °C 1420
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 16
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 14
29
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 2.8
5.6
Embodied Energy, MJ/kg 40
76
Embodied Water, L/kg 150
190

Common Calculations

PREN (Pitting Resistance) 20
45
Resilience: Ultimate (Unit Rupture Work), MJ/m3 250 to 260
200
Resilience: Unit (Modulus of Resilience), kJ/m3 150 to 170
210
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 22 to 23
21
Strength to Weight: Bending, points 21
20
Thermal Diffusivity, mm2/s 4.0
3.2
Thermal Shock Resistance, points 14 to 15
14

Alloy Composition

Carbon (C), % 0.030 to 0.080
0 to 0.025
Chromium (Cr), % 18 to 19
19.5 to 20.5
Copper (Cu), % 1.3 to 2.0
0.5 to 1.0
Iron (Fe), % 67.4 to 73.6
49.5 to 56.3
Manganese (Mn), % 1.5 to 4.0
0 to 1.2
Molybdenum (Mo), % 0
6.0 to 7.0
Nickel (Ni), % 5.5 to 6.9
17.5 to 19.5
Nitrogen (N), % 0.030 to 0.11
0.18 to 0.24
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.015
0 to 0.010