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S44800 Stainless Steel vs. S20161 Stainless Steel

Both S44800 stainless steel and S20161 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 84% of their average alloy composition in common.

For each property being compared, the top bar is S44800 stainless steel and the bottom bar is S20161 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
250
Elastic (Young's, Tensile) Modulus, GPa 210
190
Elongation at Break, % 23
46
Fatigue Strength, MPa 300
360
Poisson's Ratio 0.27
0.28
Reduction in Area, % 45
45
Rockwell C Hardness 18
22
Shear Modulus, GPa 82
76
Shear Strength, MPa 370
690
Tensile Strength: Ultimate (UTS), MPa 590
980
Tensile Strength: Yield (Proof), MPa 450
390

Thermal Properties

Latent Heat of Fusion, J/g 300
330
Maximum Temperature: Corrosion, °C 460
410
Maximum Temperature: Mechanical, °C 1100
870
Melting Completion (Liquidus), °C 1460
1380
Melting Onset (Solidus), °C 1410
1330
Specific Heat Capacity, J/kg-K 480
490
Thermal Conductivity, W/m-K 17
15
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 19
12
Density, g/cm3 7.8
7.5
Embodied Carbon, kg CO2/kg material 3.8
2.7
Embodied Energy, MJ/kg 52
39
Embodied Water, L/kg 190
130

Common Calculations

PREN (Pitting Resistance) 42
19
Resilience: Ultimate (Unit Rupture Work), MJ/m3 120
360
Resilience: Unit (Modulus of Resilience), kJ/m3 480
390
Stiffness to Weight: Axial, points 15
14
Stiffness to Weight: Bending, points 25
26
Strength to Weight: Axial, points 21
36
Strength to Weight: Bending, points 20
29
Thermal Diffusivity, mm2/s 4.6
4.0
Thermal Shock Resistance, points 19
22

Alloy Composition

Carbon (C), % 0 to 0.010
0 to 0.15
Chromium (Cr), % 28 to 30
15 to 18
Copper (Cu), % 0 to 0.15
0
Iron (Fe), % 62.6 to 66.5
65.6 to 73.9
Manganese (Mn), % 0 to 0.3
4.0 to 6.0
Molybdenum (Mo), % 3.5 to 4.2
0
Nickel (Ni), % 2.0 to 2.5
4.0 to 6.0
Nitrogen (N), % 0 to 0.020
0.080 to 0.2
Phosphorus (P), % 0 to 0.025
0 to 0.040
Silicon (Si), % 0 to 0.2
3.0 to 4.0
Sulfur (S), % 0 to 0.020
0 to 0.040