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ASTM A387 Grade 91 Class 2 vs. SAE-AISI T15 Steel

Both ASTM A387 grade 91 class 2 and SAE-AISI T15 steel are iron alloys. They have 76% 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 A387 grade 91 class 2 and the bottom bar is SAE-AISI T15 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 75
76
Tensile Strength: Ultimate (UTS), MPa 670
830 to 2240

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1460
1690
Melting Onset (Solidus), °C 1420
1640
Specific Heat Capacity, J/kg-K 470
430
Thermal Conductivity, W/m-K 26
21
Thermal Expansion, µm/m-K 13
12

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
43
Density, g/cm3 7.8
8.7
Embodied Carbon, kg CO2/kg material 2.6
16
Embodied Energy, MJ/kg 37
250
Embodied Water, L/kg 88
140

Common Calculations

PREN (Pitting Resistance) 13
27
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
22
Strength to Weight: Axial, points 24
26 to 71
Strength to Weight: Bending, points 22
22 to 43
Thermal Diffusivity, mm2/s 6.9
5.6
Thermal Shock Resistance, points 19
26 to 70

Alloy Composition

Aluminum (Al), % 0 to 0.020
0
Carbon (C), % 0.080 to 0.12
1.5 to 1.6
Chromium (Cr), % 8.0 to 9.5
3.8 to 5.0
Cobalt (Co), % 0
4.8 to 5.3
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 87.3 to 90.3
67.5 to 73.5
Manganese (Mn), % 0.3 to 0.6
0.15 to 0.4
Molybdenum (Mo), % 0.85 to 1.1
0 to 1.0
Nickel (Ni), % 0 to 0.4
0 to 0.3
Niobium (Nb), % 0.060 to 0.1
0
Nitrogen (N), % 0.030 to 0.070
0
Phosphorus (P), % 0 to 0.020
0 to 0.030
Silicon (Si), % 0.2 to 0.5
0.15 to 0.4
Sulfur (S), % 0 to 0.010
0 to 0.030
Titanium (Ti), % 0 to 0.010
0
Tungsten (W), % 0
11.8 to 13
Vanadium (V), % 0.18 to 0.25
4.5 to 5.3
Zirconium (Zr), % 0 to 0.010
0