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AISI 420 Stainless Steel vs. S44626 Stainless Steel

Both AISI 420 stainless steel and S44626 stainless steel are iron alloys. They have 85% of their average alloy composition in common.

For each property being compared, the top bar is AISI 420 stainless steel and the bottom bar is S44626 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 190
200
Elongation at Break, % 8.0 to 15
23
Fatigue Strength, MPa 220 to 670
230
Poisson's Ratio 0.28
0.27
Rockwell B Hardness 84
83
Shear Modulus, GPa 76
80
Shear Strength, MPa 420 to 1010
340
Tensile Strength: Ultimate (UTS), MPa 690 to 1720
540
Tensile Strength: Yield (Proof), MPa 380 to 1310
350

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 390
560
Maximum Temperature: Mechanical, °C 620
1100
Melting Completion (Liquidus), °C 1510
1440
Melting Onset (Solidus), °C 1450
1390
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 27
17
Thermal Expansion, µm/m-K 10
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 3.0
2.3
Electrical Conductivity: Equal Weight (Specific), % IACS 3.5
2.7

Otherwise Unclassified Properties

Base Metal Price, % relative 7.5
14
Density, g/cm3 7.7
7.7
Embodied Carbon, kg CO2/kg material 2.0
2.9
Embodied Energy, MJ/kg 28
42
Embodied Water, L/kg 100
160

Common Calculations

PREN (Pitting Resistance) 14
30
Resilience: Ultimate (Unit Rupture Work), MJ/m3 88 to 130
110
Resilience: Unit (Modulus of Resilience), kJ/m3 380 to 4410
300
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 25 to 62
19
Strength to Weight: Bending, points 22 to 41
19
Thermal Diffusivity, mm2/s 7.3
4.6
Thermal Shock Resistance, points 25 to 62
18

Alloy Composition

Carbon (C), % 0.15 to 0.4
0 to 0.060
Chromium (Cr), % 12 to 14
25 to 27
Copper (Cu), % 0
0 to 0.2
Iron (Fe), % 82.3 to 87.9
68.1 to 74.1
Manganese (Mn), % 0 to 1.0
0 to 0.75
Molybdenum (Mo), % 0 to 0.5
0.75 to 1.5
Nickel (Ni), % 0 to 0.75
0 to 0.5
Nitrogen (N), % 0
0 to 0.040
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0
0.2 to 1.0