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EN 1.4347 Stainless Steel vs. ACI-ASTM CB7Cu-1 Steel

Both EN 1.4347 stainless steel and ACI-ASTM CB7Cu-1 steel are iron alloys. They have 87% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4347 stainless steel and the bottom bar is ACI-ASTM CB7Cu-1 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 23
5.7 to 11
Fatigue Strength, MPa 320
420 to 590
Impact Strength: V-Notched Charpy, J 34
34
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 79
76
Tensile Strength: Ultimate (UTS), MPa 660
960 to 1350
Tensile Strength: Yield (Proof), MPa 480
760 to 1180

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Melting Completion (Liquidus), °C 1410
1430
Melting Onset (Solidus), °C 1370
1500
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 13
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
2.0
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
2.3

Otherwise Unclassified Properties

Base Metal Price, % relative 16
13
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.6
Embodied Energy, MJ/kg 44
38
Embodied Water, L/kg 170
130

Common Calculations

PREN (Pitting Resistance) 28
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 570
1500 to 3590
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 24
34 to 48
Strength to Weight: Bending, points 22
28 to 35
Thermal Diffusivity, mm2/s 4.0
4.6
Thermal Shock Resistance, points 19
32 to 45

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.070
Chromium (Cr), % 25 to 27
15.5 to 17.7
Copper (Cu), % 0
2.5 to 3.2
Iron (Fe), % 62.2 to 69.4
72.3 to 78.4
Manganese (Mn), % 0 to 1.5
0 to 0.7
Nickel (Ni), % 5.5 to 7.5
3.6 to 4.6
Niobium (Nb), % 0
0 to 0.35
Nitrogen (N), % 0.1 to 0.2
0 to 0.050
Phosphorus (P), % 0 to 0.035
0 to 0.035
Silicon (Si), % 0 to 1.5
0 to 1.0
Sulfur (S), % 0 to 0.020
0 to 0.030