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ASTM Grade HK Steel vs. Austenitic Nodular Cast Iron

Both ASTM grade HK steel and austenitic nodular cast iron are iron alloys. There are 24 material properties with values for both materials. Properties with values for just one material (8, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HK steel and the bottom bar is austenitic nodular cast iron.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 150
140 to 240
Elastic (Young's, Tensile) Modulus, GPa 200
180 to 190
Elongation at Break, % 11
6.8 to 34
Poisson's Ratio 0.27
0.29 to 0.3
Shear Modulus, GPa 79
70 to 72
Tensile Strength: Ultimate (UTS), MPa 500
430 to 500
Tensile Strength: Yield (Proof), MPa 270
190 to 240

Thermal Properties

Latent Heat of Fusion, J/g 310
280 to 350
Melting Completion (Liquidus), °C 1400
1340 to 1400
Melting Onset (Solidus), °C 1350
1300 to 1360
Specific Heat Capacity, J/kg-K 480
470 to 490
Thermal Expansion, µm/m-K 17
13 to 14

Otherwise Unclassified Properties

Base Metal Price, % relative 25
16 to 25
Density, g/cm3 7.8
7.7 to 8.0
Embodied Carbon, kg CO2/kg material 4.4
3.5 to 4.9
Embodied Energy, MJ/kg 63
48 to 68
Embodied Water, L/kg 200
91 to 120

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 48
24 to 140
Resilience: Unit (Modulus of Resilience), kJ/m3 190
98 to 160
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24 to 25
Strength to Weight: Axial, points 18
15 to 18
Strength to Weight: Bending, points 18
16 to 18
Thermal Shock Resistance, points 11
12 to 15