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EN 1.4122 Stainless Steel vs. SAE-AISI 4320 Steel

Both EN 1.4122 stainless steel and SAE-AISI 4320 steel are iron alloys. They have 83% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is EN 1.4122 stainless steel and the bottom bar is SAE-AISI 4320 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 14
21 to 29
Fatigue Strength, MPa 260 to 360
320
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 480 to 520
370 to 500
Tensile Strength: Ultimate (UTS), MPa 790 to 850
570 to 790
Tensile Strength: Yield (Proof), MPa 450 to 630
430 to 460

Thermal Properties

Latent Heat of Fusion, J/g 280
250
Maximum Temperature: Mechanical, °C 870
420
Melting Completion (Liquidus), °C 1440
1460
Melting Onset (Solidus), °C 1400
1420
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 15
46
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
7.4
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
8.5

Otherwise Unclassified Properties

Base Metal Price, % relative 9.5
3.4
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.4
1.7
Embodied Energy, MJ/kg 33
22
Embodied Water, L/kg 120
52

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 93 to 110
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 520 to 1000
480 to 560
Stiffness to Weight: Axial, points 14
13
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 28 to 31
20 to 28
Strength to Weight: Bending, points 25 to 26
19 to 24
Thermal Diffusivity, mm2/s 4.0
13
Thermal Shock Resistance, points 28 to 30
19 to 27

Alloy Composition

Carbon (C), % 0.33 to 0.45
0.17 to 0.22
Chromium (Cr), % 15.5 to 17.5
0.4 to 0.6
Iron (Fe), % 77.2 to 83.4
95.8 to 97
Manganese (Mn), % 0 to 1.5
0.45 to 0.65
Molybdenum (Mo), % 0.8 to 1.3
0.2 to 0.3
Nickel (Ni), % 0 to 1.0
1.7 to 2.0
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.015
0 to 0.040

Comparable Variants