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SAE-AISI H19 Steel vs. ASTM A387 Grade 91 Class 2

Both SAE-AISI H19 steel and ASTM A387 grade 91 class 2 are iron alloys. They have 89% 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 SAE-AISI H19 steel and the bottom bar is ASTM A387 grade 91 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 75
75
Tensile Strength: Ultimate (UTS), MPa 720 to 1990
670

Thermal Properties

Latent Heat of Fusion, J/g 260
270
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
26
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 22
7.0
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 7.5
2.6
Embodied Energy, MJ/kg 110
37
Embodied Water, L/kg 110
88

Common Calculations

PREN (Pitting Resistance) 13
13
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 24 to 68
24
Strength to Weight: Bending, points 22 to 43
22
Thermal Diffusivity, mm2/s 7.9
6.9
Thermal Shock Resistance, points 21 to 59
19

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 0.32 to 0.45
0.080 to 0.12
Chromium (Cr), % 4.0 to 4.8
8.0 to 9.5
Cobalt (Co), % 4.0 to 4.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 85.5
87.3 to 90.3
Manganese (Mn), % 0.2 to 0.5
0.3 to 0.6
Molybdenum (Mo), % 0.3 to 0.55
0.85 to 1.1
Nickel (Ni), % 0 to 0.3
0 to 0.4
Niobium (Nb), % 0
0.060 to 0.1
Nitrogen (N), % 0
0.030 to 0.070
Phosphorus (P), % 0 to 0.030
0 to 0.020
Silicon (Si), % 0.2 to 0.5
0.2 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 3.8 to 4.5
0
Vanadium (V), % 1.8 to 2.2
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010