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ASTM Grade HP Steel vs. SAE-AISI T4 Steel

Both ASTM grade HP steel and SAE-AISI T4 steel are iron alloys. They have 42% 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 ASTM grade HP steel and the bottom bar is SAE-AISI T4 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 78
80
Tensile Strength: Ultimate (UTS), MPa 490
800 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 320
250
Melting Completion (Liquidus), °C 1370
1810
Melting Onset (Solidus), °C 1330
1750
Specific Heat Capacity, J/kg-K 480
410
Thermal Conductivity, W/m-K 12
21
Thermal Expansion, µm/m-K 16
12

Otherwise Unclassified Properties

Base Metal Price, % relative 34
55
Density, g/cm3 7.9
9.4
Embodied Carbon, kg CO2/kg material 5.8
8.5
Embodied Energy, MJ/kg 82
130
Embodied Water, L/kg 220
120

Common Calculations

PREN (Pitting Resistance) 27
37
Stiffness to Weight: Axial, points 14
12
Stiffness to Weight: Bending, points 25
21
Strength to Weight: Axial, points 17
24 to 64
Strength to Weight: Bending, points 17
20 to 39
Thermal Diffusivity, mm2/s 3.2
5.4
Thermal Shock Resistance, points 11
24 to 64

Alloy Composition

Carbon (C), % 0.35 to 0.75
0.7 to 0.8
Chromium (Cr), % 24 to 28
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 29.2 to 42.7
66.3 to 72.3
Manganese (Mn), % 0 to 2.0
0.1 to 0.4
Molybdenum (Mo), % 0 to 0.5
0.4 to 1.0
Nickel (Ni), % 33 to 37
0 to 0.3
Phosphorus (P), % 0 to 0.040
0 to 0.030
Silicon (Si), % 0 to 2.5
0.2 to 0.4
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
17.5 to 19
Vanadium (V), % 0
0.8 to 1.2