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AISI 420F Stainless Steel vs. S44725 Stainless Steel

Both AISI 420F stainless steel and S44725 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 84% 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 S44725 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 230
180
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 18
22
Fatigue Strength, MPa 270
210
Poisson's Ratio 0.28
0.27
Shear Modulus, GPa 76
81
Shear Strength, MPa 460
320
Tensile Strength: Ultimate (UTS), MPa 740
500
Tensile Strength: Yield (Proof), MPa 430
310

Thermal Properties

Latent Heat of Fusion, J/g 270
290
Maximum Temperature: Corrosion, °C 390
500
Maximum Temperature: Mechanical, °C 760
1100
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 25
17
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.1
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 3.7
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 7.0
15
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
3.1
Embodied Energy, MJ/kg 28
44
Embodied Water, L/kg 100
170

Common Calculations

PREN (Pitting Resistance) 14
33
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
99
Resilience: Unit (Modulus of Resilience), kJ/m3 480
240
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 27
18
Strength to Weight: Bending, points 23
18
Thermal Diffusivity, mm2/s 6.8
4.6
Thermal Shock Resistance, points 27
16

Alloy Composition

Carbon (C), % 0.3 to 0.4
0 to 0.015
Chromium (Cr), % 12 to 14
25 to 28.5
Iron (Fe), % 82.4 to 87.6
67.6 to 73.5
Manganese (Mn), % 0 to 1.3
0 to 0.4
Molybdenum (Mo), % 0 to 0.5
1.5 to 2.5
Nickel (Ni), % 0
0 to 0.3
Niobium (Nb), % 0
0 to 0.26
Nitrogen (N), % 0
0 to 0.018
Phosphorus (P), % 0 to 0.060
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.040
Sulfur (S), % 0.15 to 0.35
0 to 0.020
Titanium (Ti), % 0
0 to 0.26