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N08904 Stainless Steel vs. AISI 309 Stainless Steel

Both N08904 stainless steel and AISI 309 stainless steel are iron alloys. They have 82% of their average alloy composition in common.

For each property being compared, the top bar is N08904 stainless steel and the bottom bar is AISI 309 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
180 to 210
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 38
34 to 47
Fatigue Strength, MPa 200
250 to 280
Poisson's Ratio 0.28
0.27
Rockwell B Hardness 77
84
Shear Modulus, GPa 79
78
Shear Strength, MPa 370
420 to 470
Tensile Strength: Ultimate (UTS), MPa 540
600 to 710
Tensile Strength: Yield (Proof), MPa 240
260 to 350

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 430
440
Maximum Temperature: Mechanical, °C 1100
980
Melting Completion (Liquidus), °C 1440
1450
Melting Onset (Solidus), °C 1390
1400
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 12
16
Thermal Expansion, µm/m-K 16
15

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.2
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.5

Otherwise Unclassified Properties

Base Metal Price, % relative 32
19
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 5.8
3.6
Embodied Energy, MJ/kg 79
51
Embodied Water, L/kg 200
170

Common Calculations

PREN (Pitting Resistance) 37
23
Resilience: Ultimate (Unit Rupture Work), MJ/m3 170
200 to 230
Resilience: Unit (Modulus of Resilience), kJ/m3 150
170 to 310
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 19
21 to 25
Strength to Weight: Bending, points 18
20 to 23
Thermal Diffusivity, mm2/s 3.1
4.3
Thermal Shock Resistance, points 12
14 to 16

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.2
Chromium (Cr), % 19 to 23
22 to 24
Copper (Cu), % 1.0 to 2.0
0
Iron (Fe), % 38.8 to 53
58 to 66
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 4.0 to 5.0
0
Nickel (Ni), % 23 to 28
12 to 15
Nitrogen (N), % 0 to 0.1
0
Phosphorus (P), % 0 to 0.045
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.035
0 to 0.030