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EN 1.4020 Stainless Steel vs. SAE-AISI A7 Steel

Both EN 1.4020 stainless steel and SAE-AISI A7 steel are iron alloys. They have 74% of their average alloy composition in common. There are 20 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 EN 1.4020 stainless steel and the bottom bar is SAE-AISI A7 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 77
72
Tensile Strength: Ultimate (UTS), MPa 770 to 1130
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1390
1470
Melting Onset (Solidus), °C 1350
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 17
12

Otherwise Unclassified Properties

Base Metal Price, % relative 11
10
Density, g/cm3 7.6
7.7
Embodied Carbon, kg CO2/kg material 2.5
13
Embodied Energy, MJ/kg 37
200
Embodied Water, L/kg 150
100

Common Calculations

PREN (Pitting Resistance) 23
11
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28 to 41
29 to 77
Strength to Weight: Bending, points 25 to 32
25 to 48
Thermal Shock Resistance, points 16 to 23
27 to 72

Alloy Composition

Carbon (C), % 0 to 0.15
2.0 to 2.9
Chromium (Cr), % 16.5 to 19
5.0 to 5.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 62.8 to 71.8
81.4 to 87.7
Manganese (Mn), % 11 to 14
0 to 0.8
Molybdenum (Mo), % 0
0.9 to 1.4
Nickel (Ni), % 0.5 to 2.5
0 to 0.3
Nitrogen (N), % 0.2 to 0.45
0
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.030
0 to 0.030
Tungsten (W), % 0
0.5 to 1.5
Vanadium (V), % 0
3.9 to 5.2