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EN 1.4931 Steel vs. SAE-AISI A4 Steel

Both EN 1.4931 steel and SAE-AISI A4 steel are iron alloys. They have 89% 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 A4 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
73
Tensile Strength: Ultimate (UTS), MPa 810
710 to 2050

Thermal Properties

Latent Heat of Fusion, J/g 270
250
Melting Completion (Liquidus), °C 1460
1450
Melting Onset (Solidus), °C 1420
1410
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 24
40
Thermal Expansion, µm/m-K 14
12

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 9.8
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 11
8.6

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
3.9
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 2.9
1.8
Embodied Energy, MJ/kg 42
24
Embodied Water, L/kg 100
59

Common Calculations

PREN (Pitting Resistance) 16
5.3
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 29
25 to 73
Strength to Weight: Bending, points 25
23 to 46
Thermal Diffusivity, mm2/s 6.5
11
Thermal Shock Resistance, points 22
23 to 67

Alloy Composition

Carbon (C), % 0.2 to 0.26
1.0 to 1.1
Chromium (Cr), % 11.3 to 12.2
0.9 to 2.2
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 83.2 to 86.8
92 to 95.5
Manganese (Mn), % 0.5 to 0.8
1.8 to 2.2
Molybdenum (Mo), % 1.0 to 1.2
0.9 to 1.4
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 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0 to 0.5
0
Vanadium (V), % 0.25 to 0.35
0