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EN 1.4421 Stainless Steel vs. SAE-AISI A7 Steel

Both EN 1.4421 stainless steel and SAE-AISI A7 steel are iron alloys. They have 84% 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 EN 1.4421 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 880 to 1100
800 to 2150

Thermal Properties

Latent Heat of Fusion, J/g 280
260
Melting Completion (Liquidus), °C 1440
1470
Melting Onset (Solidus), °C 1400
1430
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 16
37
Thermal Expansion, µm/m-K 10
12

Otherwise Unclassified Properties

Base Metal Price, % relative 12
10
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 2.6
13
Embodied Energy, MJ/kg 36
200
Embodied Water, L/kg 130
100

Common Calculations

PREN (Pitting Resistance) 18
11
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 31 to 39
29 to 77
Strength to Weight: Bending, points 26 to 30
25 to 48
Thermal Diffusivity, mm2/s 4.4
10
Thermal Shock Resistance, points 31 to 39
27 to 72

Alloy Composition

Carbon (C), % 0 to 0.060
2.0 to 2.9
Chromium (Cr), % 15.5 to 17.5
5.0 to 5.8
Copper (Cu), % 0
0 to 0.25
Iron (Fe), % 74.4 to 80.5
81.4 to 87.7
Manganese (Mn), % 0 to 1.0
0 to 0.8
Molybdenum (Mo), % 0 to 0.7
0.9 to 1.4
Nickel (Ni), % 4.0 to 5.5
0 to 0.3
Phosphorus (P), % 0 to 0.035
0 to 0.030
Silicon (Si), % 0 to 0.8
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.030
Tungsten (W), % 0
0.5 to 1.5
Vanadium (V), % 0
3.9 to 5.2

Comparable Variants