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N08700 Stainless Steel vs. AISI 308 Stainless Steel

Both N08700 stainless steel and AISI 308 stainless steel are iron alloys. Both are furnished in the annealed condition. They have 80% of their average alloy composition in common.

For each property being compared, the top bar is N08700 stainless steel and the bottom bar is AISI 308 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 170
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 32
45
Fatigue Strength, MPa 210
210
Poisson's Ratio 0.28
0.28
Reduction in Area, % 45
57
Rockwell B Hardness 81
76
Shear Modulus, GPa 79
78
Shear Strength, MPa 410
410
Tensile Strength: Ultimate (UTS), MPa 620
590
Tensile Strength: Yield (Proof), MPa 270
230

Thermal Properties

Latent Heat of Fusion, J/g 300
290
Maximum Temperature: Corrosion, °C 460
420
Maximum Temperature: Mechanical, °C 1100
990
Melting Completion (Liquidus), °C 1450
1420
Melting Onset (Solidus), °C 1400
1380
Specific Heat Capacity, J/kg-K 470
480
Thermal Conductivity, W/m-K 13
15
Thermal Expansion, µm/m-K 16
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.4
Electrical Conductivity: Equal Weight (Specific), % IACS 1.9
2.8

Otherwise Unclassified Properties

Base Metal Price, % relative 32
17
Density, g/cm3 8.1
7.8
Embodied Carbon, kg CO2/kg material 6.0
3.2
Embodied Energy, MJ/kg 82
46
Embodied Water, L/kg 200
150

Common Calculations

PREN (Pitting Resistance) 36
20
Resilience: Ultimate (Unit Rupture Work), MJ/m3 160
210
Resilience: Unit (Modulus of Resilience), kJ/m3 180
140
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 21
21
Strength to Weight: Bending, points 20
20
Thermal Diffusivity, mm2/s 3.5
4.1
Thermal Shock Resistance, points 14
13

Alloy Composition

Carbon (C), % 0 to 0.040
0 to 0.080
Chromium (Cr), % 19 to 23
19 to 21
Copper (Cu), % 0 to 0.5
0
Iron (Fe), % 42 to 52.7
64.1 to 71
Manganese (Mn), % 0 to 2.0
0 to 2.0
Molybdenum (Mo), % 4.3 to 5.0
0
Nickel (Ni), % 24 to 26
10 to 12
Niobium (Nb), % 0 to 0.4
0
Phosphorus (P), % 0 to 0.040
0 to 0.045
Silicon (Si), % 0 to 1.0
0 to 0.75
Sulfur (S), % 0 to 0.030
0 to 0.030