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EN 1.4901 Stainless Steel vs. Austempered Cast Iron

Both EN 1.4901 stainless steel and austempered cast iron are iron alloys. They have 89% of their average alloy composition in common. There are 25 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is EN 1.4901 stainless steel and the bottom bar is austempered cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 19
1.1 to 13
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
62 to 69
Tensile Strength: Ultimate (UTS), MPa 740
860 to 1800
Tensile Strength: Yield (Proof), MPa 490
560 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 260
280
Melting Completion (Liquidus), °C 1490
1380
Melting Onset (Solidus), °C 1450
1340
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 26
42
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 11
2.9
Density, g/cm3 7.9
7.5
Embodied Carbon, kg CO2/kg material 2.8
1.8
Embodied Energy, MJ/kg 40
25
Embodied Water, L/kg 89
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
19 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 620
880 to 3970
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 26
32 to 66
Strength to Weight: Bending, points 23
27 to 44
Thermal Diffusivity, mm2/s 6.9
11
Thermal Shock Resistance, points 23
25 to 53

Alloy Composition

Aluminum (Al), % 0 to 0.020
0 to 0.050
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0.0010 to 0.0060
0
Carbon (C), % 0.070 to 0.13
3.4 to 3.8
Chromium (Cr), % 8.5 to 9.5
0 to 0.1
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 85.8 to 89.1
89.6 to 94
Magnesium (Mg), % 0
0 to 0.040
Manganese (Mn), % 0.3 to 0.6
0.3 to 0.4
Molybdenum (Mo), % 0.3 to 0.6
0 to 0.3
Nickel (Ni), % 0 to 0.4
0 to 2.0
Niobium (Nb), % 0.040 to 0.090
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.040
Selenium (Se), % 0
0 to 0.030
Silicon (Si), % 0 to 0.5
2.3 to 2.7
Sulfur (S), % 0 to 0.010
0 to 0.020
Tin (Sn), % 0
0 to 0.020
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 1.5 to 2.0
0
Vanadium (V), % 0.15 to 0.25
0 to 0.1
Zirconium (Zr), % 0 to 0.010
0