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SAE-AISI A8 Steel vs. SAE-AISI H43 Steel

Both SAE-AISI A8 steel and SAE-AISI H43 steel are iron alloys. They have a moderately high 91% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A8 steel and the bottom bar is SAE-AISI H43 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
77
Tensile Strength: Ultimate (UTS), MPa 700 to 1920
710 to 2140

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1480
1530
Melting Onset (Solidus), °C 1430
1480
Specific Heat Capacity, J/kg-K 470
460
Thermal Conductivity, W/m-K 37
30
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
14
Density, g/cm3 7.9
7.9
Embodied Carbon, kg CO2/kg material 2.3
8.2
Embodied Energy, MJ/kg 31
120
Embodied Water, L/kg 73
100

Common Calculations

PREN (Pitting Resistance) 12
31
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 25 to 68
25 to 75
Strength to Weight: Bending, points 22 to 44
22 to 46
Thermal Diffusivity, mm2/s 9.9
8.3
Thermal Shock Resistance, points 22 to 62
21 to 62

Alloy Composition

Carbon (C), % 0.5 to 0.6
0.5 to 0.65
Chromium (Cr), % 4.8 to 5.5
3.8 to 4.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 88.5 to 91.9
83.2 to 85.9
Manganese (Mn), % 0 to 0.5
0.15 to 0.4
Molybdenum (Mo), % 1.2 to 1.7
7.8 to 8.5
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.75 to 1.1
0.2 to 0.45
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 1.0 to 1.5
0
Vanadium (V), % 0
1.8 to 2.2

Comparable Variants