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SAE-AISI H25 Steel vs. ASTM Grade HP Steel

Both SAE-AISI H25 steel and ASTM grade HP steel are iron alloys. They have 41% of their average alloy composition in common. There are 22 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 SAE-AISI H25 steel and the bottom bar is ASTM grade HP steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 79
78
Tensile Strength: Ultimate (UTS), MPa 710 to 1620
490

Thermal Properties

Latent Heat of Fusion, J/g 250
320
Melting Completion (Liquidus), °C 1750
1370
Melting Onset (Solidus), °C 1700
1330
Specific Heat Capacity, J/kg-K 420
480
Thermal Conductivity, W/m-K 26
12
Thermal Expansion, µm/m-K 12
16

Otherwise Unclassified Properties

Base Metal Price, % relative 38
34
Density, g/cm3 9.1
7.9
Embodied Carbon, kg CO2/kg material 6.2
5.8
Embodied Energy, MJ/kg 93
82
Embodied Water, L/kg 83
220

Common Calculations

PREN (Pitting Resistance) 29
27
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 22
25
Strength to Weight: Axial, points 22 to 50
17
Strength to Weight: Bending, points 20 to 34
17
Thermal Diffusivity, mm2/s 6.7
3.2
Thermal Shock Resistance, points 22 to 49
11

Alloy Composition

Carbon (C), % 0.22 to 0.32
0.35 to 0.75
Chromium (Cr), % 3.8 to 4.5
24 to 28
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 77.2 to 81.3
29.2 to 42.7
Manganese (Mn), % 0.15 to 0.4
0 to 2.0
Molybdenum (Mo), % 0
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), % 0.15 to 0.4
0 to 2.5
Sulfur (S), % 0 to 0.030
0 to 0.040
Tungsten (W), % 14 to 16
0
Vanadium (V), % 0.4 to 0.6
0