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SAE-AISI 50B60 Steel vs. Austempered Cast Iron

Both SAE-AISI 50B60 steel and austempered cast iron are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 26 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI 50B60 steel and the bottom bar is austempered cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 190
270 to 490
Elastic (Young's, Tensile) Modulus, GPa 190
180
Elongation at Break, % 12 to 20
1.1 to 13
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 72
62 to 69
Tensile Strength: Ultimate (UTS), MPa 610 to 630
860 to 1800
Tensile Strength: Yield (Proof), MPa 350 to 530
560 to 1460

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1450
1380
Melting Onset (Solidus), °C 1410
1340
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 45
42
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 2.0
2.9
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 1.4
1.8
Embodied Energy, MJ/kg 19
25
Embodied Water, L/kg 48
48

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 71 to 100
19 to 95
Resilience: Unit (Modulus of Resilience), kJ/m3 330 to 750
880 to 3970
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 22 to 23
32 to 66
Strength to Weight: Bending, points 20 to 21
27 to 44
Thermal Diffusivity, mm2/s 12
11
Thermal Shock Resistance, points 20
25 to 53

Alloy Composition

Aluminum (Al), % 0
0 to 0.050
Arsenic (As), % 0
0 to 0.020
Boron (B), % 0.00050 to 0.0030
0
Carbon (C), % 0.56 to 0.64
3.4 to 3.8
Chromium (Cr), % 0.4 to 0.6
0 to 0.1
Copper (Cu), % 0
0 to 0.8
Iron (Fe), % 97.3 to 98.1
89.6 to 94
Magnesium (Mg), % 0
0 to 0.040
Manganese (Mn), % 0.75 to 1.0
0.3 to 0.4
Molybdenum (Mo), % 0
0 to 0.3
Nickel (Ni), % 0
0 to 2.0
Phosphorus (P), % 0 to 0.035
0 to 0.040
Selenium (Se), % 0
0 to 0.030
Silicon (Si), % 0.15 to 0.35
2.3 to 2.7
Sulfur (S), % 0 to 0.040
0 to 0.020
Tin (Sn), % 0
0 to 0.020
Vanadium (V), % 0
0 to 0.1