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Ductile Cast Iron vs. EN 1.4945 Stainless Steel

Both ductile cast iron and EN 1.4945 stainless steel are iron alloys. They have 62% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ductile cast iron and the bottom bar is EN 1.4945 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 310
200 to 220
Elastic (Young's, Tensile) Modulus, GPa 170 to 180
200
Elongation at Break, % 2.1 to 20
19 to 34
Poisson's Ratio 0.28 to 0.31
0.28
Shear Modulus, GPa 64 to 70
77
Shear Strength, MPa 420 to 800
430 to 460
Tensile Strength: Ultimate (UTS), MPa 460 to 920
640 to 740
Tensile Strength: Yield (Proof), MPa 310 to 670
290 to 550

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Mechanical, °C 290
920
Melting Completion (Liquidus), °C 1160
1490
Melting Onset (Solidus), °C 1120
1440
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 31 to 36
14
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
3.2

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
30
Density, g/cm3 7.1 to 7.5
8.1
Embodied Carbon, kg CO2/kg material 1.5
5.0
Embodied Energy, MJ/kg 21
73
Embodied Water, L/kg 43
150

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
130 to 180
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
210 to 760
Stiffness to Weight: Axial, points 12 to 14
14
Stiffness to Weight: Bending, points 24 to 26
24
Strength to Weight: Axial, points 17 to 35
22 to 25
Strength to Weight: Bending, points 18 to 29
20 to 22
Thermal Diffusivity, mm2/s 8.9 to 10
3.7
Thermal Shock Resistance, points 17 to 35
14 to 16

Alloy Composition

Carbon (C), % 3.0 to 3.5
0.040 to 0.1
Chromium (Cr), % 0
15.5 to 17.5
Iron (Fe), % 93.7 to 95.5
57.9 to 65.7
Manganese (Mn), % 0
0 to 1.5
Nickel (Ni), % 0
15.5 to 17.5
Niobium (Nb), % 0
0.4 to 1.2
Nitrogen (N), % 0
0.060 to 0.14
Phosphorus (P), % 0 to 0.080
0 to 0.035
Silicon (Si), % 1.5 to 2.8
0.3 to 0.6
Sulfur (S), % 0
0 to 0.015
Tungsten (W), % 0
2.5 to 3.5

Comparable Variants