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AISI 445 Stainless Steel vs. N08320 Stainless Steel

Both AISI 445 stainless steel and N08320 stainless steel are iron alloys. They have 67% of their average alloy composition in common.

For each property being compared, the top bar is AISI 445 stainless steel and the bottom bar is N08320 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 160
190
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 25
40
Fatigue Strength, MPa 160
190
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 71
84
Shear Modulus, GPa 78
78
Shear Strength, MPa 310
400
Tensile Strength: Ultimate (UTS), MPa 480
580
Tensile Strength: Yield (Proof), MPa 230
220

Thermal Properties

Latent Heat of Fusion, J/g 290
300
Maximum Temperature: Corrosion, °C 480
430
Maximum Temperature: Mechanical, °C 950
1100
Melting Completion (Liquidus), °C 1440
1400
Melting Onset (Solidus), °C 1390
1350
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 21
12
Thermal Expansion, µm/m-K 11
16

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 2.6
1.7
Electrical Conductivity: Equal Weight (Specific), % IACS 3.0
2.0

Otherwise Unclassified Properties

Base Metal Price, % relative 12
28
Density, g/cm3 7.7
8.0
Embodied Carbon, kg CO2/kg material 2.6
4.9
Embodied Energy, MJ/kg 38
69
Embodied Water, L/kg 130
200

Common Calculations

PREN (Pitting Resistance) 20
22
Resilience: Ultimate (Unit Rupture Work), MJ/m3 98
180
Resilience: Unit (Modulus of Resilience), kJ/m3 140
120
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 25
24
Strength to Weight: Axial, points 17
20
Strength to Weight: Bending, points 18
20
Thermal Diffusivity, mm2/s 5.6
3.3
Thermal Shock Resistance, points 16
13

Alloy Composition

Carbon (C), % 0 to 0.020
0 to 0.050
Chromium (Cr), % 19 to 21
21 to 23
Copper (Cu), % 0.3 to 0.6
0
Iron (Fe), % 74.9 to 80.7
40.4 to 50
Manganese (Mn), % 0 to 1.0
0 to 2.5
Nickel (Ni), % 0 to 0.6
25 to 27
Niobium (Nb), % 0 to 0.8
0
Nitrogen (N), % 0 to 0.030
0
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.012
0 to 0.030