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SAE-AISI A2 Steel vs. SAE-AISI 1151 Steel

Both SAE-AISI A2 steel and SAE-AISI 1151 steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 23 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 A2 steel and the bottom bar is SAE-AISI 1151 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
190
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 74
72
Tensile Strength: Ultimate (UTS), MPa 710 to 2040
710 to 800

Thermal Properties

Latent Heat of Fusion, J/g 260
250
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1420
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 38
51
Thermal Expansion, µm/m-K 11
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.2
10
Electrical Conductivity: Equal Weight (Specific), % IACS 9.5
12

Otherwise Unclassified Properties

Base Metal Price, % relative 5.5
1.8
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.7
1.4
Embodied Energy, MJ/kg 38
18
Embodied Water, L/kg 73
46

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 73
25 to 28
Strength to Weight: Bending, points 23 to 46
22 to 24
Thermal Diffusivity, mm2/s 10
14
Thermal Shock Resistance, points 25 to 71
22 to 25

Alloy Composition

Carbon (C), % 1.0 to 1.1
0.48 to 0.55
Chromium (Cr), % 4.8 to 5.5
0
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 89.4 to 93.3
98.3 to 98.7
Manganese (Mn), % 0 to 1.0
0.7 to 1.0
Molybdenum (Mo), % 0.9 to 1.4
0
Nickel (Ni), % 0 to 0.3
0
Phosphorus (P), % 0 to 0.030
0 to 0.040
Silicon (Si), % 0 to 0.5
0
Sulfur (S), % 0 to 0.030
0.080 to 0.13
Vanadium (V), % 0.15 to 0.5
0