MakeItFrom.com
Menu (ESC)

N08020 Stainless Steel vs. SAE-AISI 8740 Steel

Both N08020 stainless steel and SAE-AISI 8740 steel are iron alloys. They have a modest 39% of their average alloy composition in common, which, by itself, doesn't mean much. There are 30 material properties with values for both materials. Properties with values for just one material (3, in this case) are not shown.

For each property being compared, the top bar is N08020 stainless steel and the bottom bar is SAE-AISI 8740 steel.

Metric UnitsUS Customary Units

Mechanical Properties

Elastic (Young's, Tensile) Modulus, GPa 200
190
Elongation at Break, % 15 to 34
11 to 23
Fatigue Strength, MPa 210 to 240
270 to 350
Poisson's Ratio 0.28
0.29
Shear Modulus, GPa 77
73
Shear Strength, MPa 380 to 410
370 to 400
Tensile Strength: Ultimate (UTS), MPa 610 to 620
580 to 670
Tensile Strength: Yield (Proof), MPa 270 to 420
380 to 570

Thermal Properties

Latent Heat of Fusion, J/g 300
250
Maximum Temperature: Mechanical, °C 1100
410
Melting Completion (Liquidus), °C 1410
1460
Melting Onset (Solidus), °C 1360
1420
Specific Heat Capacity, J/kg-K 460
470
Thermal Conductivity, W/m-K 12
39
Thermal Expansion, µm/m-K 15
13

Electrical Properties

Electrical Conductivity: Equal Volume, % IACS 1.6
7.3
Electrical Conductivity: Equal Weight (Specific), % IACS 1.8
8.4

Otherwise Unclassified Properties

Base Metal Price, % relative 38
2.6
Density, g/cm3 8.2
7.8
Embodied Carbon, kg CO2/kg material 6.6
1.5
Embodied Energy, MJ/kg 92
20
Embodied Water, L/kg 220
50

Common Calculations

Resilience: Ultimate (Unit Rupture Work), MJ/m3 83 to 170
71 to 120
Resilience: Unit (Modulus of Resilience), kJ/m3 180 to 440
390 to 850
Stiffness to Weight: Axial, points 13
13
Stiffness to Weight: Bending, points 24
24
Strength to Weight: Axial, points 21
20 to 24
Strength to Weight: Bending, points 20
20 to 22
Thermal Diffusivity, mm2/s 3.2
10
Thermal Shock Resistance, points 15
17 to 20

Alloy Composition

Carbon (C), % 0 to 0.070
0.38 to 0.43
Chromium (Cr), % 19 to 21
0.4 to 0.6
Copper (Cu), % 3.0 to 4.0
0
Iron (Fe), % 29.9 to 44
96.5 to 97.7
Manganese (Mn), % 0 to 2.0
0.75 to 1.0
Molybdenum (Mo), % 2.0 to 3.0
0.2 to 0.3
Nickel (Ni), % 32 to 38
0.4 to 0.7
Niobium (Nb), % 0 to 1.0
0
Phosphorus (P), % 0 to 0.045
0 to 0.035
Silicon (Si), % 0 to 1.0
0.15 to 0.35
Sulfur (S), % 0 to 0.035
0 to 0.040

Comparable Variants