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ASTM Grade HT Steel vs. SAE-AISI M44 Steel

Both ASTM grade HT steel and SAE-AISI M44 steel are iron alloys. They have 51% 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 ASTM grade HT steel and the bottom bar is SAE-AISI M44 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
78
Tensile Strength: Ultimate (UTS), MPa 500
870 to 2290

Thermal Properties

Latent Heat of Fusion, J/g 310
270
Melting Completion (Liquidus), °C 1390
1590
Melting Onset (Solidus), °C 1340
1540
Specific Heat Capacity, J/kg-K 480
440
Thermal Conductivity, W/m-K 12
14
Thermal Expansion, µm/m-K 15
12

Otherwise Unclassified Properties

Base Metal Price, % relative 31
43
Density, g/cm3 8.0
8.4
Embodied Carbon, kg CO2/kg material 5.4
9.9
Embodied Energy, MJ/kg 76
150
Embodied Water, L/kg 190
170

Common Calculations

PREN (Pitting Resistance) 18
35
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
23
Strength to Weight: Axial, points 18
28 to 75
Strength to Weight: Bending, points 18
24 to 46
Thermal Diffusivity, mm2/s 3.2
3.7
Thermal Shock Resistance, points 12
27 to 70

Alloy Composition

Carbon (C), % 0.35 to 0.75
1.1 to 1.2
Chromium (Cr), % 15 to 19
4.0 to 4.8
Cobalt (Co), % 0
11 to 12.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 38.2 to 51.7
65.3 to 70.6
Manganese (Mn), % 0 to 2.0
0.2 to 0.4
Molybdenum (Mo), % 0 to 0.5
6.0 to 7.0
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
0.3 to 0.55
Sulfur (S), % 0 to 0.040
0 to 0.030
Tungsten (W), % 0
5.0 to 5.8
Vanadium (V), % 0
1.9 to 2.2