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EN 1.4971 Stainless Steel vs. Grey Cast Iron

Both EN 1.4971 stainless steel and grey cast iron are iron alloys. They have a modest 32% of their average alloy composition in common, which, by itself, doesn't mean much. There are 28 material properties with values for both materials. Properties with values for just one material (6, in this case) are not shown.

For each property being compared, the top bar is EN 1.4971 stainless steel and the bottom bar is grey cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 240
160 to 300
Elastic (Young's, Tensile) Modulus, GPa 210
180
Elongation at Break, % 34
9.6
Fatigue Strength, MPa 270
69 to 170
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 81
69
Shear Strength, MPa 530
180 to 610
Tensile Strength: Ultimate (UTS), MPa 800
160 to 450
Tensile Strength: Yield (Proof), MPa 340
98 to 290

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1410
1180
Specific Heat Capacity, J/kg-K 450
490
Thermal Conductivity, W/m-K 13
46
Thermal Expansion, µm/m-K 15
11

Otherwise Unclassified Properties

Base Metal Price, % relative 70
1.9
Density, g/cm3 8.4
7.5
Embodied Carbon, kg CO2/kg material 7.6
1.5
Embodied Energy, MJ/kg 110
21
Embodied Water, L/kg 300
44

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 220
13 to 37
Resilience: Unit (Modulus of Resilience), kJ/m3 280
27 to 240
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
5.8 to 17
Strength to Weight: Bending, points 23
8.7 to 17
Thermal Diffusivity, mm2/s 3.4
13
Thermal Shock Resistance, points 19
6.0 to 17

Alloy Composition

Carbon (C), % 0.080 to 0.16
3.1 to 3.4
Chromium (Cr), % 20 to 22.5
0
Cobalt (Co), % 18.5 to 21
0
Iron (Fe), % 24.3 to 37.1
92.1 to 93.9
Manganese (Mn), % 0 to 2.0
0.5 to 0.7
Molybdenum (Mo), % 2.5 to 3.5
0
Nickel (Ni), % 19 to 21
0
Niobium (Nb), % 0.75 to 1.3
0
Nitrogen (N), % 0.1 to 0.2
0
Phosphorus (P), % 0 to 0.035
0 to 0.9
Silicon (Si), % 0 to 1.0
2.5 to 2.8
Sulfur (S), % 0 to 0.015
0 to 0.15
Tungsten (W), % 2.0 to 3.0
0