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AISI 431 Stainless Steel vs. N08904 Stainless Steel

Both AISI 431 stainless steel and N08904 stainless steel are iron alloys. They have 65% of their average alloy composition in common. There are 33 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 431 stainless steel and the bottom bar is N08904 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 250
170
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 15 to 17
38
Fatigue Strength, MPa 430 to 610
200
Poisson's Ratio 0.28
0.28
Shear Modulus, GPa 77
79
Shear Strength, MPa 550 to 840
370
Tensile Strength: Ultimate (UTS), MPa 890 to 1380
540
Tensile Strength: Yield (Proof), MPa 710 to 1040
240

Thermal Properties

Latent Heat of Fusion, J/g 280
300
Maximum Temperature: Corrosion, °C 400
430
Maximum Temperature: Mechanical, °C 850
1100
Melting Completion (Liquidus), °C 1510
1440
Melting Onset (Solidus), °C 1450
1390
Specific Heat Capacity, J/kg-K 480
470
Thermal Conductivity, W/m-K 26
12
Thermal Expansion, µm/m-K 12
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
1.9

Otherwise Unclassified Properties

Base Metal Price, % relative 9.0
32
Density, g/cm3 7.7
8.1
Embodied Carbon, kg CO2/kg material 2.2
5.8
Embodied Energy, MJ/kg 31
79
Embodied Water, L/kg 120
200

Common Calculations

PREN (Pitting Resistance) 16
37
Resilience: Ultimate (Unit Rupture Work), MJ/m3 140 to 180
170
Resilience: Unit (Modulus of Resilience), kJ/m3 1270 to 2770
150
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 32 to 50
19
Strength to Weight: Bending, points 27 to 36
18
Thermal Diffusivity, mm2/s 7.0
3.1
Thermal Shock Resistance, points 28 to 43
12

Alloy Composition

Carbon (C), % 0 to 0.2
0 to 0.020
Chromium (Cr), % 15 to 17
19 to 23
Copper (Cu), % 0
1.0 to 2.0
Iron (Fe), % 78.2 to 83.8
38.8 to 53
Manganese (Mn), % 0 to 1.0
0 to 2.0
Molybdenum (Mo), % 0
4.0 to 5.0
Nickel (Ni), % 1.3 to 2.5
23 to 28
Nitrogen (N), % 0
0 to 0.1
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.035