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EN 1.4931 Steel vs. SAE-AISI A8 Steel

Both EN 1.4931 steel and SAE-AISI A8 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 (8, in this case) are not shown.

For each property being compared, the top bar is EN 1.4931 steel and the bottom bar is SAE-AISI A8 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 76
74
Tensile Strength: Ultimate (UTS), MPa 810
700 to 1920

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Melting Completion (Liquidus), °C 1460
1480
Melting Onset (Solidus), °C 1420
1430
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 24
37
Thermal Expansion, µm/m-K 14
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.8
8.3
Electrical Conductivity: Equal Weight (Specific), % IACS 11
9.5

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
8.5
Density, g/cm3 7.8
7.9
Embodied Carbon, kg CO2/kg material 2.9
2.3
Embodied Energy, MJ/kg 42
31
Embodied Water, L/kg 100
73

Common Calculations

PREN (Pitting Resistance) 16
12
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29
25 to 68
Strength to Weight: Bending, points 25
22 to 44
Thermal Diffusivity, mm2/s 6.5
9.9
Thermal Shock Resistance, points 22
22 to 62

Alloy Composition

Carbon (C), % 0.2 to 0.26
0.5 to 0.6
Chromium (Cr), % 11.3 to 12.2
4.8 to 5.5
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 83.2 to 86.8
88.5 to 91.9
Manganese (Mn), % 0.5 to 0.8
0 to 0.5
Molybdenum (Mo), % 1.0 to 1.2
1.2 to 1.7
Nickel (Ni), % 0 to 1.0
0 to 0.3
Phosphorus (P), % 0 to 0.030
0 to 0.030
Silicon (Si), % 0 to 0.4
0.75 to 1.1
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0 to 0.5
1.0 to 1.5
Vanadium (V), % 0.25 to 0.35
0