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ASTM Grade HN Steel vs. SAE-AISI H23 Steel

Both ASTM grade HN steel and SAE-AISI H23 steel are iron alloys. They have 64% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is ASTM grade HN steel and the bottom bar is SAE-AISI H23 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
80
Tensile Strength: Ultimate (UTS), MPa 500
760 to 1550

Thermal Properties

Latent Heat of Fusion, J/g 310
260
Melting Completion (Liquidus), °C 1400
1680
Melting Onset (Solidus), °C 1350
1630
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 13
20
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 26
34
Density, g/cm3 7.9
8.7
Embodied Carbon, kg CO2/kg material 4.6
6.9
Embodied Energy, MJ/kg 66
110
Embodied Water, L/kg 180
120

Common Calculations

PREN (Pitting Resistance) 22
32
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 17
24 to 49
Strength to Weight: Bending, points 18
21 to 34
Thermal Diffusivity, mm2/s 3.5
5.2
Thermal Shock Resistance, points 11
23 to 47

Alloy Composition

Carbon (C), % 0.2 to 0.5
0.25 to 0.35
Chromium (Cr), % 19 to 23
11 to 12.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 44.9 to 57.8
71.3 to 76.7
Manganese (Mn), % 0 to 2.0
0.15 to 0.4
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 23 to 27
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.0
0.15 to 0.6
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
11 to 12.8
Vanadium (V), % 0
0.75 to 1.3