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AISI 422 Stainless Steel vs. S45000 Stainless Steel

Both AISI 422 stainless steel and S45000 stainless steel are iron alloys. They have 90% of their average alloy composition in common.

For each property being compared, the top bar is AISI 422 stainless steel and the bottom bar is S45000 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 260 to 330
280 to 410
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 15 to 17
6.8 to 14
Fatigue Strength, MPa 410 to 500
330 to 650
Poisson's Ratio 0.28
0.28
Reduction in Area, % 34 to 40
22 to 50
Rockwell C Hardness 21
28 to 44
Shear Modulus, GPa 76
76
Shear Strength, MPa 560 to 660
590 to 830
Tensile Strength: Ultimate (UTS), MPa 910 to 1080
980 to 1410
Tensile Strength: Yield (Proof), MPa 670 to 870
580 to 1310

Thermal Properties

Latent Heat of Fusion, J/g 270
280
Maximum Temperature: Corrosion, °C 380
400
Maximum Temperature: Mechanical, °C 650
840
Melting Completion (Liquidus), °C 1480
1440
Melting Onset (Solidus), °C 1470
1390
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 24
17
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 4.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 5.3
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 11
13
Density, g/cm3 7.9
7.8
Embodied Carbon, kg CO2/kg material 3.1
2.8
Embodied Energy, MJ/kg 44
39
Embodied Water, L/kg 100
130

Common Calculations

PREN (Pitting Resistance) 17
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 150
94 to 160
Resilience: Unit (Modulus of Resilience), kJ/m3 1140 to 1910
850 to 4400
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32 to 38
35 to 50
Strength to Weight: Bending, points 26 to 30
28 to 36
Thermal Diffusivity, mm2/s 6.4
4.5
Thermal Shock Resistance, points 33 to 39
33 to 47

Alloy Composition

Carbon (C), % 0.2 to 0.25
0 to 0.050
Chromium (Cr), % 11 to 12.5
14 to 16
Copper (Cu), % 0
1.3 to 1.8
Iron (Fe), % 81.9 to 85.8
72.1 to 79.3
Manganese (Mn), % 0.5 to 1.0
0 to 1.0
Molybdenum (Mo), % 0.9 to 1.3
0.5 to 1.0
Nickel (Ni), % 0.5 to 1.0
5.0 to 7.0
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.5
0 to 1.0
Sulfur (S), % 0 to 0.025
0 to 0.030
Tungsten (W), % 0.9 to 1.3
0
Vanadium (V), % 0.2 to 0.3
0