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EN 1.8509 Steel vs. SAE-AISI A9 Steel

Both EN 1.8509 steel and SAE-AISI A9 steel are iron alloys. They have a moderately high 92% of their average alloy composition in common. There are 24 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 EN 1.8509 steel and the bottom bar is SAE-AISI A9 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 73
74
Tensile Strength: Ultimate (UTS), MPa 1130
770 to 2030

Thermal Properties

Latent Heat of Fusion, J/g 250
280
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 39
35
Thermal Expansion, µm/m-K 13
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 7.5
7.9
Electrical Conductivity: Equal Weight (Specific), % IACS 8.6
9.2

Otherwise Unclassified Properties

Base Metal Price, % relative 2.8
7.0
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 1.6
4.7
Embodied Energy, MJ/kg 22
70
Embodied Water, L/kg 65
82

Common Calculations

PREN (Pitting Resistance) 2.6
10
Stiffness to Weight: Axial, points 13
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 40
28 to 73
Strength to Weight: Bending, points 31
24 to 46
Thermal Diffusivity, mm2/s 10
9.6
Thermal Shock Resistance, points 33
25 to 66

Alloy Composition

Aluminum (Al), % 0.8 to 1.2
0
Carbon (C), % 0.38 to 0.45
0.45 to 0.55
Chromium (Cr), % 1.5 to 1.8
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 95.5 to 97.1
87 to 90.5
Manganese (Mn), % 0.4 to 0.7
0 to 0.5
Molybdenum (Mo), % 0.2 to 0.35
1.3 to 1.8
Nickel (Ni), % 0
1.3 to 1.8
Phosphorus (P), % 0 to 0.025
0 to 0.030
Silicon (Si), % 0 to 0.4
1.0 to 1.2
Sulfur (S), % 0 to 0.035
0 to 0.030
Vanadium (V), % 0
0.8 to 1.4