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AISI 439 Stainless Steel vs. S31266 Stainless Steel

Both AISI 439 stainless steel and S31266 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 59% of their average alloy composition in common. There are 33 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is AISI 439 stainless steel and the bottom bar is S31266 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
210
Elongation at Break, % 23
40
Fatigue Strength, MPa 170
400
Poisson's Ratio 0.28
0.28
Reduction in Area, % 51
56
Shear Modulus, GPa 77
81
Shear Strength, MPa 310
590
Tensile Strength: Ultimate (UTS), MPa 490
860
Tensile Strength: Yield (Proof), MPa 250
470

Thermal Properties

Latent Heat of Fusion, J/g 280
310
Maximum Temperature: Corrosion, °C 530
440
Maximum Temperature: Mechanical, °C 890
1100
Melting Completion (Liquidus), °C 1510
1470
Melting Onset (Solidus), °C 1430
1420
Specific Heat Capacity, J/kg-K 480
460
Thermal Conductivity, W/m-K 25
12
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.9
1.8
Electrical Conductivity: Equal Weight (Specific), % IACS 3.4
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
37
Density, g/cm3 7.7
8.2
Embodied Carbon, kg CO2/kg material 2.3
6.5
Embodied Energy, MJ/kg 34
89
Embodied Water, L/kg 120
220

Common Calculations

PREN (Pitting Resistance) 18
54
Resilience: Ultimate (Unit Rupture Work), MJ/m3 95
290
Resilience: Unit (Modulus of Resilience), kJ/m3 160
540
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 18
29
Strength to Weight: Bending, points 18
24
Thermal Diffusivity, mm2/s 6.7
3.1
Thermal Shock Resistance, points 16
18

Alloy Composition

Aluminum (Al), % 0 to 0.15
0
Carbon (C), % 0 to 0.030
0 to 0.030
Chromium (Cr), % 17 to 19
23 to 25
Copper (Cu), % 0
1.0 to 2.5
Iron (Fe), % 77.1 to 82.8
34.1 to 46
Manganese (Mn), % 0 to 1.0
2.0 to 4.0
Molybdenum (Mo), % 0
5.2 to 6.2
Nickel (Ni), % 0 to 0.5
21 to 24
Nitrogen (N), % 0 to 0.030
0.35 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.035
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.020
Titanium (Ti), % 0.2 to 1.1
0
Tungsten (W), % 0
1.5 to 2.5