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AISI 439 Stainless Steel vs. AISI 422 Stainless Steel

Both AISI 439 stainless steel and AISI 422 stainless steel are iron alloys. They have a moderately high 93% of their average alloy composition in common. There are 34 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 AISI 439 stainless steel and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 23
15 to 17
Fatigue Strength, MPa 170
410 to 500
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
34 to 40
Shear Modulus, GPa 77
76
Shear Strength, MPa 310
560 to 660
Tensile Strength: Ultimate (UTS), MPa 490
910 to 1080
Tensile Strength: Yield (Proof), MPa 250
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 280
270
Maximum Temperature: Corrosion, °C 530
380
Maximum Temperature: Mechanical, °C 890
650
Melting Completion (Liquidus), °C 1510
1480
Melting Onset (Solidus), °C 1430
1470
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 25
24
Thermal Expansion, µm/m-K 11
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
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 2.3
3.1
Embodied Energy, MJ/kg 34
44
Embodied Water, L/kg 120
100

Common Calculations

PREN (Pitting Resistance) 18
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 160
1140 to 1910
Stiffness to Weight: Axial, points 14
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 6.7
6.4
Thermal Shock Resistance, points 16
33 to 39

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0.2 to 0.25
Chromium (Cr), % 17 to 19
11 to 12.5
Iron (Fe), % 77.1 to 82.8
81.9 to 85.8
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 0
0.9 to 1.3
Nickel (Ni), % 0 to 0.5
0.5 to 1.0
Nitrogen (N), % 0 to 0.030
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 0.030
0 to 0.025
Titanium (Ti), % 0.2 to 1.1
0
Tungsten (W), % 0
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3