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EN 1.4109 Stainless Steel vs. AISI 420F Stainless Steel

Both EN 1.4109 stainless steel and AISI 420F stainless steel are iron alloys. Both are furnished in the annealed condition. They have a very high 97% of their average alloy composition in common.

For each property being compared, the top bar is EN 1.4109 stainless steel and the bottom bar is AISI 420F stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
230
Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 19
18
Fatigue Strength, MPa 270
270
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 480
460
Tensile Strength: Ultimate (UTS), MPa 770
740
Tensile Strength: Yield (Proof), MPa 420
430

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 820
760
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 30
25
Thermal Expansion, µm/m-K 10
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.7
3.1
Electrical Conductivity: Equal Weight (Specific), % IACS 3.1
3.7

Otherwise Unclassified Properties

Base Metal Price, % relative 8.5
7.0
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.2
2.0
Embodied Energy, MJ/kg 30
28
Embodied Water, L/kg 110
100

Common Calculations

PREN (Pitting Resistance) 17
14
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
120
Resilience: Unit (Modulus of Resilience), kJ/m3 460
480
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 28
27
Strength to Weight: Bending, points 24
23
Thermal Diffusivity, mm2/s 8.1
6.8
Thermal Shock Resistance, points 28
27

Alloy Composition

Carbon (C), % 0.6 to 0.75
0.3 to 0.4
Chromium (Cr), % 14 to 16
12 to 14
Iron (Fe), % 80.7 to 85
82.4 to 87.6
Manganese (Mn), % 0 to 1.0
0 to 1.3
Molybdenum (Mo), % 0.4 to 0.8
0 to 0.5
Phosphorus (P), % 0 to 0.040
0 to 0.060
Silicon (Si), % 0 to 0.7
0 to 1.0
Sulfur (S), % 0 to 0.015
0.15 to 0.35