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SAE-AISI A3 Steel vs. EN 1.4971 Stainless Steel

Both SAE-AISI A3 steel and EN 1.4971 stainless steel are iron alloys. They have a modest 38% of their average alloy composition in common, which, by itself, doesn't mean much. There are 22 material properties with values for both materials. Properties with values for just one material (11, 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 1.4971 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
210
Poisson's Ratio 0.29
0.29
Shear Modulus, GPa 73
81
Tensile Strength: Ultimate (UTS), MPa 700 to 2150
800

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1410
1410
Specific Heat Capacity, J/kg-K 470
450
Thermal Conductivity, W/m-K 37
13
Thermal Expansion, µm/m-K 12
15

Otherwise Unclassified Properties

Base Metal Price, % relative 6.0
70
Density, g/cm3 7.8
8.4
Embodied Carbon, kg CO2/kg material 4.4
7.6
Embodied Energy, MJ/kg 67
110
Embodied Water, L/kg 78
300

Common Calculations

PREN (Pitting Resistance) 8.9
38
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 25 to 77
26
Strength to Weight: Bending, points 23 to 48
23
Thermal Diffusivity, mm2/s 10
3.4
Thermal Shock Resistance, points 23 to 70
19

Alloy Composition

Carbon (C), % 1.2 to 1.3
0.080 to 0.16
Chromium (Cr), % 4.8 to 5.5
20 to 22.5
Cobalt (Co), % 0
18.5 to 21
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 88.7 to 92
24.3 to 37.1
Manganese (Mn), % 0.4 to 0.6
0 to 2.0
Molybdenum (Mo), % 0.9 to 1.4
2.5 to 3.5
Nickel (Ni), % 0 to 0.3
19 to 21
Niobium (Nb), % 0
0.75 to 1.3
Nitrogen (N), % 0
0.1 to 0.2
Phosphorus (P), % 0 to 0.030
0 to 0.035
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Tungsten (W), % 0
2.0 to 3.0
Vanadium (V), % 0.8 to 1.4
0