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SAE-AISI A7 Steel vs. EN 1.4347 Stainless Steel

Both SAE-AISI A7 steel and EN 1.4347 stainless steel are iron alloys. They have 72% of their average alloy composition in common. There are 22 material properties with values for both materials. Properties with values for just one material (10, in this case) are not shown.

For each property being compared, the top bar is SAE-AISI A7 steel and the bottom bar is EN 1.4347 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 190
200
Poisson's Ratio 0.29
0.27
Shear Modulus, GPa 72
79
Tensile Strength: Ultimate (UTS), MPa 800 to 2150
660

Thermal Properties

Latent Heat of Fusion, J/g 260
300
Melting Completion (Liquidus), °C 1470
1410
Melting Onset (Solidus), °C 1430
1370
Specific Heat Capacity, J/kg-K 470
490
Thermal Conductivity, W/m-K 37
15
Thermal Expansion, µm/m-K 12
13

Otherwise Unclassified Properties

Base Metal Price, % relative 10
16
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 13
3.1
Embodied Energy, MJ/kg 200
44
Embodied Water, L/kg 100
170

Common Calculations

PREN (Pitting Resistance) 11
28
Stiffness to Weight: Axial, points 13
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 29 to 77
24
Strength to Weight: Bending, points 25 to 48
22
Thermal Diffusivity, mm2/s 10
4.0
Thermal Shock Resistance, points 27 to 72
19

Alloy Composition

Carbon (C), % 2.0 to 2.9
0 to 0.050
Chromium (Cr), % 5.0 to 5.8
25 to 27
Copper (Cu), % 0 to 0.25
0
Iron (Fe), % 81.4 to 87.7
62.2 to 69.4
Manganese (Mn), % 0 to 0.8
0 to 1.5
Molybdenum (Mo), % 0.9 to 1.4
0
Nickel (Ni), % 0 to 0.3
5.5 to 7.5
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 1.5
Sulfur (S), % 0 to 0.030
0 to 0.020
Tungsten (W), % 0.5 to 1.5
0
Vanadium (V), % 3.9 to 5.2
0