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Ductile Cast Iron vs. EN 1.4371 Stainless Steel

Both ductile cast iron and EN 1.4371 stainless steel are iron alloys. They have 71% 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 1.4371 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160 to 310
220 to 230
Elastic (Young's, Tensile) Modulus, GPa 170 to 180
200
Elongation at Break, % 2.1 to 20
45 to 51
Poisson's Ratio 0.28 to 0.31
0.28
Shear Modulus, GPa 64 to 70
77
Shear Strength, MPa 420 to 800
520 to 540
Tensile Strength: Ultimate (UTS), MPa 460 to 920
740 to 750
Tensile Strength: Yield (Proof), MPa 310 to 670
320 to 340

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Mechanical, °C 290
880
Melting Completion (Liquidus), °C 1160
1410
Melting Onset (Solidus), °C 1120
1370
Specific Heat Capacity, J/kg-K 490
480
Thermal Conductivity, W/m-K 31 to 36
15
Thermal Expansion, µm/m-K 11
17

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.4
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 8.8 to 9.4
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 1.9
12
Density, g/cm3 7.1 to 7.5
7.7
Embodied Carbon, kg CO2/kg material 1.5
2.6
Embodied Energy, MJ/kg 21
38
Embodied Water, L/kg 43
140

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 17 to 80
270 to 310
Resilience: Unit (Modulus of Resilience), kJ/m3 280 to 1330
250 to 300
Stiffness to Weight: Axial, points 12 to 14
14
Stiffness to Weight: Bending, points 24 to 26
25
Strength to Weight: Axial, points 17 to 35
27
Strength to Weight: Bending, points 18 to 29
24
Thermal Diffusivity, mm2/s 8.9 to 10
4.0
Thermal Shock Resistance, points 17 to 35
16

Alloy Composition

Carbon (C), % 3.0 to 3.5
0 to 0.030
Chromium (Cr), % 0
16 to 17.5
Copper (Cu), % 0
0 to 1.0
Iron (Fe), % 93.7 to 95.5
66.7 to 74.4
Manganese (Mn), % 0
6.0 to 8.0
Nickel (Ni), % 0
3.5 to 5.5
Nitrogen (N), % 0
0.15 to 0.25
Phosphorus (P), % 0 to 0.080
0 to 0.045
Silicon (Si), % 1.5 to 2.8
0 to 1.0
Sulfur (S), % 0
0 to 0.015

Comparable Variants