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ASTM Grade HI Steel vs. AISI W2 Steel

Both ASTM grade HI steel and AISI W2 steel are iron alloys. They have 55% of their average alloy composition in common. There are 23 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 ASTM grade HI steel and the bottom bar is AISI W2 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.27
0.29
Shear Modulus, GPa 79
72
Tensile Strength: Ultimate (UTS), MPa 550
580 to 2400

Thermal Properties

Latent Heat of Fusion, J/g 310
250
Melting Completion (Liquidus), °C 1400
1450
Melting Onset (Solidus), °C 1350
1410
Specific Heat Capacity, J/kg-K 490
470
Thermal Conductivity, W/m-K 15
45
Thermal Expansion, µm/m-K 17
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.1
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 23
2.3
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.1
2.0
Embodied Energy, MJ/kg 59
29
Embodied Water, L/kg 200
48

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 20
21 to 86
Strength to Weight: Bending, points 19
20 to 51
Thermal Diffusivity, mm2/s 3.9
12
Thermal Shock Resistance, points 12
19 to 80

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.85 to 1.5
Chromium (Cr), % 26 to 30
0 to 0.15
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 46.9 to 59.8
96.2 to 98.6
Manganese (Mn), % 0 to 2.0
0.35 to 0.74
Molybdenum (Mo), % 0 to 0.5
0 to 0.1
Nickel (Ni), % 14 to 18
0 to 0.2
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 2.0
0.1 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.025
Tungsten (W), % 0
0 to 0.15
Vanadium (V), % 0
0.15 to 0.35