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AISI 420F Stainless Steel vs. AISI 403 Stainless Steel

Both AISI 420F stainless steel and AISI 403 stainless steel are iron alloys. They have a very high 98% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 420F stainless steel and the bottom bar is AISI 403 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
190 to 240
Elastic (Young's, Tensile) Modulus, GPa 190
190
Elongation at Break, % 18
16 to 25
Fatigue Strength, MPa 270
200 to 340
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 460
340 to 480
Tensile Strength: Ultimate (UTS), MPa 740
530 to 780
Tensile Strength: Yield (Proof), MPa 430
280 to 570

Thermal Properties

Latent Heat of Fusion, J/g 270
270
Maximum Temperature: Corrosion, °C 390
390
Maximum Temperature: Mechanical, °C 760
740
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
28
Thermal Expansion, µm/m-K 10
9.9

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
3.3

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
6.5
Density, g/cm3 7.7
7.8
Embodied Carbon, kg CO2/kg material 2.0
1.9
Embodied Energy, MJ/kg 28
27
Embodied Water, L/kg 100
99

Common Calculations

PREN (Pitting Resistance) 14
12
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
110 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 480
210 to 840
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
19 to 28
Strength to Weight: Bending, points 23
19 to 24
Thermal Diffusivity, mm2/s 6.8
7.6
Thermal Shock Resistance, points 27
20 to 29

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.15
Chromium (Cr), % 12 to 14
11.5 to 13
Iron (Fe), % 82.4 to 87.6
84.7 to 88.5
Manganese (Mn), % 0 to 1.3
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Nickel (Ni), % 0
0 to 0.6
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0.15 to 0.35
0 to 0.030