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SAE-AISI H12 Steel vs. ASTM Grade HP Steel

Both SAE-AISI H12 steel and ASTM grade HP steel are iron alloys. They have 43% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI H12 steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
78
Tensile Strength: Ultimate (UTS), MPa 690 to 1850
490

Thermal Properties

Latent Heat of Fusion, J/g 270
320
Melting Completion (Liquidus), °C 1480
1370
Melting Onset (Solidus), °C 1440
1330
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 36
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
34
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.9
5.8
Embodied Energy, MJ/kg 41
82
Embodied Water, L/kg 76
220

Common Calculations

PREN (Pitting Resistance) 12
27
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 65
17
Strength to Weight: Bending, points 22 to 42
17
Thermal Diffusivity, mm2/s 9.8
3.2
Thermal Shock Resistance, points 22 to 60
11

Alloy Composition

Carbon (C), % 0.3 to 0.4
0.35 to 0.75
Chromium (Cr), % 4.8 to 5.5
24 to 28
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87.8 to 91.7
29.2 to 42.7
Manganese (Mn), % 0.2 to 0.5
0 to 2.0
Molybdenum (Mo), % 1.3 to 1.8
0 to 0.5
Nickel (Ni), % 0 to 0.3
33 to 37
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0.8 to 1.2
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 1.0 to 1.7
0
Vanadium (V), % 0 to 0.5
0