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Annealed SAE-AISI A9 vs. Annealed SAE-AISI P2

Both annealed SAE-AISI A9 and annealed SAE-AISI P2 are iron alloys. Both are furnished in the annealed condition. They have a moderately high 91% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is annealed SAE-AISI A9 and the bottom bar is annealed SAE-AISI P2.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
100
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 21
23
Fatigue Strength, MPa 250
150
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
73
Shear Strength, MPa 480
210
Tensile Strength: Ultimate (UTS), MPa 770
330
Tensile Strength: Yield (Proof), MPa 360
200

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 35
46
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
2.7
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 4.7
1.5
Embodied Energy, MJ/kg 70
20
Embodied Water, L/kg 82
51

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 130
67
Resilience: Unit (Modulus of Resilience), kJ/m3 350
110
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28
12
Strength to Weight: Bending, points 24
14
Thermal Diffusivity, mm2/s 9.6
12
Thermal Shock Resistance, points 25
11

Alloy Composition

Carbon (C), % 0.45 to 0.55
0 to 0.1
Chromium (Cr), % 4.8 to 5.5
0.75 to 1.3
Copper (Cu), % 0 to 0.25
0 to 0.25
Iron (Fe), % 87 to 90.5
96.6 to 98.8
Manganese (Mn), % 0 to 0.5
0.1 to 0.4
Molybdenum (Mo), % 1.3 to 1.8
0.15 to 0.4
Nickel (Ni), % 1.3 to 1.8
0.1 to 0.5
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 1.0 to 1.2
0.1 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.030
Vanadium (V), % 0.8 to 1.4
0