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SAE-AISI A9 Steel vs. EN 1.1221 Steel

Both SAE-AISI A9 steel and EN 1.1221 steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 23 material properties with values for both materials. Properties with values for just one material (9, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A9 steel and the bottom bar is EN 1.1221 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 770 to 2030
730 to 870

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Melting Completion (Liquidus), °C 1460
1460
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 35
48
Thermal Expansion, µm/m-K 12
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.9
7.2
Electrical Conductivity: Equal Weight (Specific), % IACS 9.2
8.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
2.1
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.7
1.5
Embodied Energy, MJ/kg 70
19
Embodied Water, L/kg 82
47

Common Calculations

Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 73
26 to 31
Strength to Weight: Bending, points 24 to 46
23 to 26
Thermal Diffusivity, mm2/s 9.6
13
Thermal Shock Resistance, points 25 to 66
23 to 28

Alloy Composition

Carbon (C), % 0.45 to 0.55
0.57 to 0.65
Chromium (Cr), % 4.8 to 5.5
0 to 0.4
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 87 to 90.5
97.1 to 98.8
Manganese (Mn), % 0 to 0.5
0.6 to 0.9
Molybdenum (Mo), % 1.3 to 1.8
0 to 0.1
Nickel (Ni), % 1.3 to 1.8
0 to 0.4
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 1.0 to 1.2
0 to 0.4
Sulfur (S), % 0 to 0.030
0 to 0.035
Vanadium (V), % 0.8 to 1.4
0

Comparable Variants