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Hardened SAE-AISI H19 vs. Hardened SAE-AISI P6

Both hardened SAE-AISI H19 and hardened SAE-AISI P6 are iron alloys. Both are furnished in the hardened (H) condition. They have 86% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is hardened SAE-AISI H19 and the bottom bar is hardened SAE-AISI P6.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Rockwell C Hardness 62
60
Shear Modulus, GPa 75
73
Tensile Strength: Ultimate (UTS), MPa 1990
1930

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1540
1460
Melting Onset (Solidus), °C 1490
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 29
43
Thermal Expansion, µm/m-K 12
12

Otherwise Unclassified Properties

Base Metal Price, % relative 22
4.6
Density, g/cm3 8.2
7.9
Embodied Carbon, kg CO2/kg material 7.5
1.8
Embodied Energy, MJ/kg 110
24
Embodied Water, L/kg 110
59

Common Calculations

Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 68
68
Strength to Weight: Bending, points 43
44
Thermal Diffusivity, mm2/s 7.9
11
Thermal Shock Resistance, points 59
63

Alloy Composition

Carbon (C), % 0.32 to 0.45
0.050 to 0.15
Chromium (Cr), % 4.0 to 4.8
1.3 to 1.8
Cobalt (Co), % 4.0 to 4.5
0
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 81.4 to 85.5
92.9 to 95
Manganese (Mn), % 0.2 to 0.5
0.35 to 0.7
Molybdenum (Mo), % 0.3 to 0.55
0
Nickel (Ni), % 0 to 0.3
3.3 to 3.8
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0.2 to 0.5
0.1 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 3.8 to 4.5
0
Vanadium (V), % 1.8 to 2.2
0