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AISI 309 Stainless Steel vs. S44660 Stainless Steel

Both AISI 309 stainless steel and S44660 stainless steel are iron alloys. They have 88% of their average alloy composition in common.

For each property being compared, the top bar is AISI 309 stainless steel and the bottom bar is S44660 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
210
Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 34 to 47
20
Fatigue Strength, MPa 250 to 280
330
Poisson's Ratio 0.27
0.27
Rockwell B Hardness 84
88
Shear Modulus, GPa 78
81
Shear Strength, MPa 420 to 470
410
Tensile Strength: Ultimate (UTS), MPa 600 to 710
660
Tensile Strength: Yield (Proof), MPa 260 to 350
510

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 440
640
Maximum Temperature: Mechanical, °C 980
1100
Melting Completion (Liquidus), °C 1450
1460
Melting Onset (Solidus), °C 1400
1410
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 16
17
Thermal Expansion, µm/m-K 15
11

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.2
2.5
Electrical Conductivity: Equal Weight (Specific), % IACS 2.5
2.9

Otherwise Unclassified Properties

Base Metal Price, % relative 19
21
Density, g/cm3 7.8
7.7
Embodied Carbon, kg CO2/kg material 3.6
4.3
Embodied Energy, MJ/kg 51
61
Embodied Water, L/kg 170
180

Common Calculations

PREN (Pitting Resistance) 23
38
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
120
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
640
Stiffness to Weight: Axial, points 14
15
Stiffness to Weight: Bending, points 25
25
Strength to Weight: Axial, points 21 to 25
24
Strength to Weight: Bending, points 20 to 23
22
Thermal Diffusivity, mm2/s 4.3
4.5
Thermal Shock Resistance, points 14 to 16
21

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 22 to 24
25 to 28
Iron (Fe), % 58 to 66
60.4 to 71
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
3.0 to 4.0
Nickel (Ni), % 12 to 15
1.0 to 3.5
Niobium (Nb), % 0
0.2 to 1.0
Nitrogen (N), % 0
0 to 0.040
Phosphorus (P), % 0 to 0.045
0 to 0.040
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030
Titanium (Ti), % 0
0.2 to 1.0