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N08320 Stainless Steel vs. S43940 Stainless Steel

Both N08320 stainless steel and S43940 stainless steel are iron alloys. They have 64% of their average alloy composition in common.

For each property being compared, the top bar is N08320 stainless steel and the bottom bar is S43940 stainless steel.

Metric UnitsUS Customary Units

Mechanical Properties

Brinell Hardness 190
160
Elastic (Young's, Tensile) Modulus, GPa 200
200
Elongation at Break, % 40
21
Fatigue Strength, MPa 190
180
Poisson's Ratio 0.28
0.28
Rockwell B Hardness 84
76
Shear Modulus, GPa 78
77
Shear Strength, MPa 400
310
Tensile Strength: Ultimate (UTS), MPa 580
490
Tensile Strength: Yield (Proof), MPa 220
280

Thermal Properties

Latent Heat of Fusion, J/g 300
280
Maximum Temperature: Corrosion, °C 430
540
Maximum Temperature: Mechanical, °C 1100
890
Melting Completion (Liquidus), °C 1400
1440
Melting Onset (Solidus), °C 1350
1400
Specific Heat Capacity, J/kg-K 480
480
Thermal Conductivity, W/m-K 12
25
Thermal Expansion, µm/m-K 16
10

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.7
2.9
Electrical Conductivity: Equal Weight (Specific), % IACS 2.0
3.4

Otherwise Unclassified Properties

Base Metal Price, % relative 28
12
Density, g/cm3 8.0
7.7
Embodied Carbon, kg CO2/kg material 4.9
2.6
Embodied Energy, MJ/kg 69
38
Embodied Water, L/kg 200
120

Common Calculations

PREN (Pitting Resistance) 22
18
Resilience: Ultimate (Unit Rupture Work), MJ/m3 180
86
Resilience: Unit (Modulus of Resilience), kJ/m3 120
200
Stiffness to Weight: Axial, points 14
14
Stiffness to Weight: Bending, points 24
25
Strength to Weight: Axial, points 20
18
Strength to Weight: Bending, points 20
18
Thermal Diffusivity, mm2/s 3.3
6.8
Thermal Shock Resistance, points 13
18

Alloy Composition

Carbon (C), % 0 to 0.050
0 to 0.030
Chromium (Cr), % 21 to 23
17.5 to 18.5
Iron (Fe), % 40.4 to 50
78.2 to 82.1
Manganese (Mn), % 0 to 2.5
0 to 1.0
Nickel (Ni), % 25 to 27
0
Niobium (Nb), % 0
0.3 to 0.6
Phosphorus (P), % 0 to 0.040
0 to 0.040
Silicon (Si), % 0 to 1.0
0 to 1.0
Sulfur (S), % 0 to 0.030
0 to 0.015
Titanium (Ti), % 0
0.1 to 0.6