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AISI 420F Stainless Steel vs. S44330 Stainless Steel

Both AISI 420F stainless steel and S44330 stainless steel are iron alloys. Both are furnished in the annealed condition. They have a moderately high 90% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (1, in this case) are not shown.

For each property being compared, the top bar is AISI 420F stainless steel and the bottom bar is S44330 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
160
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 18
25
Fatigue Strength, MPa 270
160
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
78
Shear Strength, MPa 460
280
Tensile Strength: Ultimate (UTS), MPa 740
440
Tensile Strength: Yield (Proof), MPa 430
230

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
560
Maximum Temperature: Mechanical, °C 760
990
Melting Completion (Liquidus), °C 1440
1440
Melting Onset (Solidus), °C 1390
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
21
Thermal Expansion, µm/m-K 10
10

Electrical Properties

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

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
13
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.8
Embodied Energy, MJ/kg 28
40
Embodied Water, L/kg 100
140

Common Calculations

PREN (Pitting Resistance) 14
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
91
Resilience: Unit (Modulus of Resilience), kJ/m3 480
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
16
Strength to Weight: Bending, points 23
17
Thermal Diffusivity, mm2/s 6.8
5.7
Thermal Shock Resistance, points 27
16

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.025
Chromium (Cr), % 12 to 14
20 to 23
Copper (Cu), % 0
0.3 to 0.8
Iron (Fe), % 82.4 to 87.6
72.5 to 79.7
Manganese (Mn), % 0 to 1.3
0 to 1.0
Molybdenum (Mo), % 0 to 0.5
0
Niobium (Nb), % 0
0 to 0.8
Nitrogen (N), % 0
0 to 0.025
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0.15 to 0.35
0 to 0.030
Titanium (Ti), % 0
0 to 0.8