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AISI 309S Stainless Steel vs. S44800 Stainless Steel

Both AISI 309S stainless steel and S44800 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 88% of their average alloy composition in common. There are 34 material properties with values for both materials. Properties with values for just one material (2, in this case) are not shown.

For each property being compared, the top bar is AISI 309S stainless steel and the bottom bar is S44800 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
190
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 42
23
Fatigue Strength, MPa 210
300
Poisson's Ratio 0.27
0.27
Reduction in Area, % 51
45
Shear Modulus, GPa 78
82
Shear Strength, MPa 400
370
Tensile Strength: Ultimate (UTS), MPa 580
590
Tensile Strength: Yield (Proof), MPa 230
450

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 440
460
Maximum Temperature: Mechanical, °C 1080
1100
Melting Completion (Liquidus), °C 1420
1460
Melting Onset (Solidus), °C 1370
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 15
17
Thermal Expansion, µm/m-K 16
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.6
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
3.0

Otherwise Unclassified Properties

Base Metal Price, % relative 19
19
Density, g/cm3 7.8
7.8
Embodied Carbon, kg CO2/kg material 3.6
3.8
Embodied Energy, MJ/kg 51
52
Embodied Water, L/kg 170
190

Common Calculations

PREN (Pitting Resistance) 23
42
Resilience: Ultimate (Unit Rupture Work), MJ/m3 190
120
Resilience: Unit (Modulus of Resilience), kJ/m3 140
480
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21
21
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 4.0
4.6
Thermal Shock Resistance, points 13
19

Alloy Composition

Carbon (C), % 0 to 0.080
0 to 0.010
Chromium (Cr), % 22 to 24
28 to 30
Copper (Cu), % 0
0 to 0.15
Iron (Fe), % 58.1 to 66
62.6 to 66.5
Manganese (Mn), % 0 to 2.0
0 to 0.3
Molybdenum (Mo), % 0
3.5 to 4.2
Nickel (Ni), % 12 to 15
2.0 to 2.5
Nitrogen (N), % 0
0 to 0.020
Phosphorus (P), % 0 to 0.045
0 to 0.025
Silicon (Si), % 0 to 0.75
0 to 0.2
Sulfur (S), % 0 to 0.030
0 to 0.020