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AISI 309 Stainless Steel vs. S31727 Stainless Steel

Both AISI 309 stainless steel and S31727 stainless steel are iron alloys. They have a moderately high 90% of their average alloy composition in common. There are 30 material properties with values for both materials. Properties with values for just one material (5, in this case) are not shown.

For each property being compared, the top bar is AISI 309 stainless steel and the bottom bar is S31727 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 180 to 210
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 34 to 47
40
Fatigue Strength, MPa 250 to 280
240
Poisson's Ratio 0.27
0.28
Rockwell B Hardness 84
83
Shear Modulus, GPa 78
78
Shear Strength, MPa 420 to 470
430
Tensile Strength: Ultimate (UTS), MPa 600 to 710
630
Tensile Strength: Yield (Proof), MPa 260 to 350
270

Thermal Properties

Latent Heat of Fusion, J/g 290
290
Maximum Temperature: Corrosion, °C 440
420
Maximum Temperature: Mechanical, °C 980
1010
Melting Completion (Liquidus), °C 1450
1440
Melting Onset (Solidus), °C 1400
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Expansion, µm/m-K 15
16

Otherwise Unclassified Properties

Base Metal Price, % relative 19
24
Density, g/cm3 7.8
8.0
Embodied Carbon, kg CO2/kg material 3.6
4.7
Embodied Energy, MJ/kg 51
64
Embodied Water, L/kg 170
180

Common Calculations

PREN (Pitting Resistance) 23
35
Resilience: Ultimate (Unit Rupture Work), MJ/m3 200 to 230
200
Resilience: Unit (Modulus of Resilience), kJ/m3 170 to 310
190
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 21 to 25
22
Strength to Weight: Bending, points 20 to 23
20
Thermal Shock Resistance, points 14 to 16
14

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.030
Chromium (Cr), % 22 to 24
17.5 to 19
Copper (Cu), % 0
2.8 to 4.0
Iron (Fe), % 58 to 66
53.7 to 61.3
Manganese (Mn), % 0 to 2.0
0 to 1.0
Molybdenum (Mo), % 0
3.8 to 4.5
Nickel (Ni), % 12 to 15
14.5 to 16.5
Nitrogen (N), % 0
0.15 to 0.21
Phosphorus (P), % 0 to 0.045
0 to 0.030
Silicon (Si), % 0 to 0.75
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.030