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S39274 Stainless Steel vs. AISI 422 Stainless Steel

Both S39274 stainless steel and AISI 422 stainless steel are iron alloys. They have 77% of their average alloy composition in common.

For each property being compared, the top bar is S39274 stainless steel and the bottom bar is AISI 422 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 270
260 to 330
Elastic (Young's, Tensile) Modulus, GPa 210
200
Elongation at Break, % 17
15 to 17
Fatigue Strength, MPa 380
410 to 500
Poisson's Ratio 0.27
0.28
Reduction in Area, % 34
34 to 40
Rockwell C Hardness 28
21
Shear Modulus, GPa 81
76
Shear Strength, MPa 560
560 to 660
Tensile Strength: Ultimate (UTS), MPa 900
910 to 1080
Tensile Strength: Yield (Proof), MPa 620
670 to 870

Thermal Properties

Latent Heat of Fusion, J/g 300
270
Maximum Temperature: Corrosion, °C 450
380
Maximum Temperature: Mechanical, °C 1100
650
Melting Completion (Liquidus), °C 1480
1480
Melting Onset (Solidus), °C 1430
1470
Specific Heat Capacity, J/kg-K 470
470
Thermal Conductivity, W/m-K 16
24
Thermal Expansion, µm/m-K 13
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
4.7
Electrical Conductivity: Equal Weight (Specific), % IACS 2.4
5.3

Otherwise Unclassified Properties

Base Metal Price, % relative 24
11
Density, g/cm3 8.0
7.9
Embodied Carbon, kg CO2/kg material 4.3
3.1
Embodied Energy, MJ/kg 60
44
Embodied Water, L/kg 180
100

Common Calculations

PREN (Pitting Resistance) 43
17
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140
140 to 150
Resilience: Unit (Modulus of Resilience), kJ/m3 940
1140 to 1910
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 32
32 to 38
Strength to Weight: Bending, points 26
26 to 30
Thermal Diffusivity, mm2/s 4.2
6.4
Thermal Shock Resistance, points 25
33 to 39

Alloy Composition

Carbon (C), % 0 to 0.030
0.2 to 0.25
Chromium (Cr), % 24 to 26
11 to 12.5
Copper (Cu), % 0.2 to 0.8
0
Iron (Fe), % 57 to 65.6
81.9 to 85.8
Manganese (Mn), % 0 to 1.0
0.5 to 1.0
Molybdenum (Mo), % 2.5 to 3.5
0.9 to 1.3
Nickel (Ni), % 6.0 to 8.0
0.5 to 1.0
Nitrogen (N), % 0.24 to 0.32
0
Phosphorus (P), % 0 to 0.030
0 to 0.025
Silicon (Si), % 0 to 0.8
0 to 0.5
Sulfur (S), % 0 to 0.020
0 to 0.025
Tungsten (W), % 1.5 to 2.5
0.9 to 1.3
Vanadium (V), % 0
0.2 to 0.3