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S44725 Stainless Steel vs. AISI 422 Stainless Steel

Both S44725 stainless steel and AISI 422 stainless steel are iron alloys. 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 (3, in this case) are not shown.

For each property being compared, the top bar is S44725 stainless steel and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 22
15 to 17
Fatigue Strength, MPa 210
410 to 500
Poisson's Ratio 0.27
0.28
Shear Modulus, GPa 81
76
Shear Strength, MPa 320
560 to 660
Tensile Strength: Ultimate (UTS), MPa 500
910 to 1080
Tensile Strength: Yield (Proof), MPa 310
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 290
270
Maximum Temperature: Corrosion, °C 500
380
Maximum Temperature: Mechanical, °C 1100
650
Melting Completion (Liquidus), °C 1450
1480
Melting Onset (Solidus), °C 1410
1470
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 17
24
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.4
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.8
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 15
11
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 3.1
3.1
Embodied Energy, MJ/kg 44
44
Embodied Water, L/kg 170
100

Common Calculations

PREN (Pitting Resistance) 33
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 99
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 240
1140 to 1910
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 18
32 to 38
Strength to Weight: Bending, points 18
26 to 30
Thermal Diffusivity, mm2/s 4.6
6.4
Thermal Shock Resistance, points 16
33 to 39

Alloy Composition

Carbon (C), % 0 to 0.015
0.2 to 0.25
Chromium (Cr), % 25 to 28.5
11 to 12.5
Iron (Fe), % 67.6 to 73.5
81.9 to 85.8
Manganese (Mn), % 0 to 0.4
0.5 to 1.0
Molybdenum (Mo), % 1.5 to 2.5
0.9 to 1.3
Nickel (Ni), % 0 to 0.3
0.5 to 1.0
Niobium (Nb), % 0 to 0.26
0
Nitrogen (N), % 0 to 0.018
0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 0.040
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.025
Titanium (Ti), % 0 to 0.26
0
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3