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SAE-AISI T1 Steel vs. ASTM A387 Grade 91 Class 2

Both SAE-AISI T1 steel and ASTM A387 grade 91 class 2 are iron alloys. They have 80% 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 T1 steel and the bottom bar is ASTM A387 grade 91 class 2.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 80
75
Tensile Strength: Ultimate (UTS), MPa 770 to 2130
670

Thermal Properties

Latent Heat of Fusion, J/g 240
270
Melting Completion (Liquidus), °C 1810
1460
Melting Onset (Solidus), °C 1750
1420
Specific Heat Capacity, J/kg-K 410
470
Thermal Conductivity, W/m-K 20
26
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 45
7.0
Density, g/cm3 9.3
7.8
Embodied Carbon, kg CO2/kg material 8.2
2.6
Embodied Energy, MJ/kg 130
37
Embodied Water, L/kg 90
88

Common Calculations

PREN (Pitting Resistance) 34
13
Stiffness to Weight: Axial, points 12
14
Stiffness to Weight: Bending, points 21
25
Strength to Weight: Axial, points 23 to 64
24
Strength to Weight: Bending, points 20 to 40
22
Thermal Diffusivity, mm2/s 5.2
6.9
Thermal Shock Resistance, points 23 to 64
19

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 0.65 to 0.8
0.080 to 0.12
Chromium (Cr), % 3.8 to 4.5
8.0 to 9.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 73.2 to 77.2
87.3 to 90.3
Manganese (Mn), % 0.1 to 0.4
0.3 to 0.6
Molybdenum (Mo), % 0
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 0.4
0.2 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.010
Titanium (Ti), % 0
0 to 0.010
Tungsten (W), % 17.3 to 18.8
0
Vanadium (V), % 0.9 to 1.3
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010