Annealed N08020 Stainless Steel
Annealed N08020 stainless steel is N08020 stainless steel in the annealed condition. The graph bars on the material properties cards below compare annealed N08020 stainless steel to: wrought superaustenitic stainless steels (top), all iron alloys (middle), and the entire database (bottom). A full bar means this is the highest value in the relevant set. A half-full bar means it's 50% of the highest, and so on.
Mechanical Properties
Brinell Hardness
190
Elastic (Young's, Tensile) Modulus
200 GPa 29 x 106 psi
Elongation at Break
34 %
Fatigue Strength
210 MPa 31 x 103 psi
Poisson's Ratio
0.28
Reduction in Area
56 %
Rockwell B Hardness
82
Shear Modulus
77 GPa 11 x 106 psi
Shear Strength
410 MPa 59 x 103 psi
Tensile Strength: Ultimate (UTS)
610 MPa 89 x 103 psi
Tensile Strength: Yield (Proof)
270 MPa 39 x 103 psi
Thermal Properties
Latent Heat of Fusion
300 J/g
Maximum Temperature: Corrosion
490 °C 920 °F
Maximum Temperature: Mechanical
1100 °C 2010 °F
Melting Completion (Liquidus)
1410 °C 2570 °F
Melting Onset (Solidus)
1360 °C 2480 °F
Specific Heat Capacity
460 J/kg-K 0.11 BTU/lb-°F
Thermal Conductivity
12 W/m-K 7.0 BTU/h-ft-°F
Thermal Expansion
15 µm/m-K
Electrical Properties
Electrical Conductivity: Equal Volume
1.6 % IACS
Electrical Conductivity: Equal Weight (Specific)
1.8 % IACS
Otherwise Unclassified Properties
Base Metal Price
38 % relative
Density
8.2 g/cm3 510 lb/ft3
Embodied Carbon
6.6 kg CO2/kg material
Embodied Energy
92 MJ/kg 40 x 103 BTU/lb
Embodied Water
220 L/kg 26 gal/lb
Common Calculations
PREN (Pitting Resistance)
28
Resilience: Ultimate (Unit Rupture Work)
170 MJ/m3
Resilience: Unit (Modulus of Resilience)
180 kJ/m3
Stiffness to Weight: Axial
13 points
Stiffness to Weight: Bending
24 points
Strength to Weight: Axial
21 points
Strength to Weight: Bending
20 points
Thermal Diffusivity
3.2 mm2/s
Thermal Shock Resistance
15 points
Alloy Composition
| Fe | 29.9 to 44 | |
| Ni | 32 to 38 | |
| Cr | 19 to 21 | |
| Cu | 3.0 to 4.0 | |
| Mo | 2.0 to 3.0 | |
| Mn | 0 to 2.0 | |
| Si | 0 to 1.0 | |
| Nb | 0 to 1.0 | |
| C | 0 to 0.070 | |
| P | 0 to 0.045 | |
| S | 0 to 0.035 |
All values are % weight. Ranges represent what is permitted under applicable standards.
Followup Questions
Further Reading
ASTM B729: Standard Specification for Seamless UNS N08020, UNS N08026, and UNS N08024 Nickel-Alloy Pipe and Tube
ASTM B463: Standard Specification for UNS N08020, UNS N08026, and UNS N08024 Alloy Plate, Sheet, and Strip
ASTM B464: Standard Specification for Welded UNS N08020, N08024, and N08026 Alloy Pipe
ASTM B462: Standard Specification for Forged or Rolled UNS N06030, UNS N06022, UNS N06035, UNS N06200, UNS N06059, UNS N06686, UNS N08020, UNS N08024, UNS N08026, UNS N08367, UNS N10276, UNS N10665, UNS N10675, UNS N10629, UNS N08031, UNS N06045, UNS N06025, and UNS R20033 Alloy Pipe Flanges, Forged Fittings, and Valves and Parts for Corrosive High-Temperature Service
ASTM A182: Standard Specification for Forged or Rolled Alloy and Stainless Steel Pipe Flanges, Forged Fittings, and Valves and Parts for High-Temperature Service
ASTM A276: Standard Specification for Stainless Steel Bars and Shapes
Nickel Alloys, Ulrich Heubner (editor), 1998
ASTM A240: Standard Specification for Chromium and Chromium-Nickel Stainless Steel Plate, Sheet, and Strip for Pressure Vessels and for General Applications
Welding Metallurgy of Stainless Steels, Erich Folkhard et al., 2012
ASTM A959: Standard Guide for Specifying Harmonized Standard Grade Compositions for Wrought Stainless Steels