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SAE-AISI A3 Steel vs. EN 1.4938 Stainless Steel

Both SAE-AISI A3 steel and EN 1.4938 stainless steel are iron alloys. They have a moderately high 90% 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 SAE-AISI A3 steel and the bottom bar is EN 1.4938 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.28
Shear Modulus, GPa 73
76
Tensile Strength: Ultimate (UTS), MPa 700 to 2150
870 to 1030

Thermal Properties

Latent Heat of Fusion, J/g 260
270
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 37
30
Thermal Expansion, µm/m-K 12
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 8.3
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 9.7
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
10
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 4.4
3.3
Embodied Energy, MJ/kg 67
47
Embodied Water, L/kg 78
110

Common Calculations

PREN (Pitting Resistance) 8.9
18
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 25 to 77
31 to 37
Strength to Weight: Bending, points 23 to 48
26 to 29
Thermal Diffusivity, mm2/s 10
8.1
Thermal Shock Resistance, points 23 to 70
30 to 35

Alloy Composition

Carbon (C), % 1.2 to 1.3
0.080 to 0.15
Chromium (Cr), % 4.8 to 5.5
11 to 12.5
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 88.7 to 92
80.5 to 84.8
Manganese (Mn), % 0.4 to 0.6
0.4 to 0.9
Molybdenum (Mo), % 0.9 to 1.4
1.5 to 2.0
Nickel (Ni), % 0 to 0.3
2.0 to 3.0
Nitrogen (N), % 0
0.020 to 0.040
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.5
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.015
Vanadium (V), % 0.8 to 1.4
0.25 to 0.4

Comparable Variants