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SAE-AISI D2 Steel vs. ASTM A369 Grade FP91

Both SAE-AISI D2 steel and ASTM A369 grade FP91 are iron alloys. They have a moderately high 95% of their average alloy composition in common. There are 30 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 D2 steel and the bottom bar is ASTM A369 grade FP91.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 5.0 to 16
19
Fatigue Strength, MPa 310 to 860
320
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 75
75
Shear Strength, MPa 460 to 1160
410
Tensile Strength: Ultimate (UTS), MPa 760 to 2000
670
Tensile Strength: Yield (Proof), MPa 470 to 1510
460

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1390
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 31
26
Thermal Expansion, µm/m-K 11
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.3
8.9
Electrical Conductivity: Equal Weight (Specific), % IACS 5.1
10

Otherwise Unclassified Properties

Base Metal Price, % relative 8.0
7.0
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 3.4
2.6
Embodied Energy, MJ/kg 50
37
Embodied Water, L/kg 100
88

Common Calculations

PREN (Pitting Resistance) 15
13
Resilience: Ultimate (Unit Rupture Work), MJ/m3 92 to 100
110
Resilience: Unit (Modulus of Resilience), kJ/m3 570 to 5940
560
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27 to 72
24
Strength to Weight: Bending, points 24 to 46
22
Thermal Diffusivity, mm2/s 8.3
6.9
Thermal Shock Resistance, points 25 to 67
18

Alloy Composition

Aluminum (Al), % 0
0 to 0.020
Carbon (C), % 1.4 to 1.6
0.080 to 0.12
Chromium (Cr), % 11 to 13
8.0 to 9.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.3 to 86.9
87.3 to 90.3
Manganese (Mn), % 0 to 0.6
0.3 to 0.6
Molybdenum (Mo), % 0.7 to 1.2
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 0.025
Silicon (Si), % 0 to 0.6
0.2 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.025
Titanium (Ti), % 0
0 to 0.010
Vanadium (V), % 0 to 1.1
0.18 to 0.25
Zirconium (Zr), % 0
0 to 0.010