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Annealed SAE-AISI H22 vs. Annealed SAE-AISI T8

Both annealed SAE-AISI H22 and annealed SAE-AISI T8 are iron alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is annealed SAE-AISI H22 and the bottom bar is annealed SAE-AISI T8.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 210
240
Elastic (Young's, Tensile) Modulus, GPa 200
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 77
78
Tensile Strength: Ultimate (UTS), MPa 700
780

Thermal Properties

Latent Heat of Fusion, J/g 250
250
Melting Completion (Liquidus), °C 1670
1730
Melting Onset (Solidus), °C 1620
1670
Specific Heat Capacity, J/kg-K 440
420
Thermal Conductivity, W/m-K 31
18
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 28
45
Density, g/cm3 8.7
9.0
Embodied Carbon, kg CO2/kg material 4.9
10
Embodied Energy, MJ/kg 73
160
Embodied Water, L/kg 72
120

Common Calculations

PREN (Pitting Resistance) 21
30
Stiffness to Weight: Axial, points 13
12
Stiffness to Weight: Bending, points 22
22
Strength to Weight: Axial, points 22
24
Strength to Weight: Bending, points 20
21
Thermal Diffusivity, mm2/s 8.2
4.8
Thermal Shock Resistance, points 22
24

Alloy Composition

Carbon (C), % 0.3 to 0.4
0.75 to 0.85
Chromium (Cr), % 1.8 to 3.8
3.8 to 4.5
Cobalt (Co), % 0
4.3 to 5.8
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 82.2 to 87.4
69.3 to 75.4
Manganese (Mn), % 0.15 to 0.4
0.2 to 0.4
Molybdenum (Mo), % 0
0.4 to 1.0
Nickel (Ni), % 0 to 0.3
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.15 to 0.4
0.2 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 10 to 11.8
13.3 to 14.8
Vanadium (V), % 0.25 to 0.5
1.8 to 2.4