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AISI 440C Stainless Steel vs. AISI 422 Stainless Steel

Both AISI 440C stainless steel and AISI 422 stainless steel are iron alloys. They have a moderately high 94% of their average alloy composition in common. There are 31 material properties with values for both materials. Properties with values for just one material (4, in this case) are not shown.

For each property being compared, the top bar is AISI 440C stainless steel and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 2.0 to 14
15 to 17
Fatigue Strength, MPa 260 to 840
410 to 500
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 76
76
Shear Strength, MPa 430 to 1120
560 to 660
Tensile Strength: Ultimate (UTS), MPa 710 to 1970
910 to 1080
Tensile Strength: Yield (Proof), MPa 450 to 1900
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 390
380
Maximum Temperature: Mechanical, °C 870
650
Melting Completion (Liquidus), °C 1480
1480
Melting Onset (Solidus), °C 1370
1470
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 22
24
Thermal Expansion, µm/m-K 10
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 9.0
11
Density, g/cm3 7.7
7.9
Embodied Carbon, kg CO2/kg material 2.2
3.1
Embodied Energy, MJ/kg 31
44
Embodied Water, L/kg 120
100

Common Calculations

PREN (Pitting Resistance) 18
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 39 to 88
140 to 150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 26 to 71
32 to 38
Strength to Weight: Bending, points 23 to 46
26 to 30
Thermal Diffusivity, mm2/s 6.0
6.4
Thermal Shock Resistance, points 26 to 71
33 to 39

Alloy Composition

Carbon (C), % 1.0 to 1.2
0.2 to 0.25
Chromium (Cr), % 16 to 18
11 to 12.5
Iron (Fe), % 78 to 83.1
81.9 to 85.8
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0 to 0.75
0.9 to 1.3
Nickel (Ni), % 0
0.5 to 1.0
Phosphorus (P), % 0 to 0.040
0 to 0.025
Silicon (Si), % 0 to 1.0
0 to 0.5
Sulfur (S), % 0 to 0.015
0 to 0.025
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3

Comparable Variants