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Forgings, Fasteners, Boltings, Stud Bolts, Screws, Nuts
ASTM B473 specification covers UNS N08020, UNS N08026, and UNS N08024 bar and wire other than required for reforging.
| Composition, % | Element | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UNS | C, max | Mn, max | P, max | S, max | Si, max | Ni | Cr | Mo | Cu | Nb + Ta | N | Fe |
| UNS N08026 | 0.03 | 1.00 | 0.03 | 0.03 | 0.50 | 33.00 to 37.20 | 22.00 to 26.00 | 5.00 to 6.70 | 2.00 to 4.00 | … | 0.10 to 0.16 | remainderA |
| UNS N08020 | 0.07 | 2.00 | 0.045 | 0.035 | 1.00 | 32.00 to 38.00 | 19.00 to 21.00 | 2.00 to 3.00 | 3.00 to 4.00 | 8 × C-1.00 | … | remainderA |
| UNS N08024 | 0.03 | 1.00 | 0.035 | 0.035 | 0.50 | 35.00 to 40.00 | 22.50 to 25.00 | 3.50 to 5.00 | 0.50 to 1.50 | 0.15 to 0.35 | … | remainderA |
| Condition | Diameter or Thickness, in. (mm) | Tensile Strength, min | Yield Strength, min | Elongation in 2 in (50.8 mm), min, % | Reduction of area, min, % | ||
|---|---|---|---|---|---|---|---|
| ksi | MPa | ksi | MPa | ||||
| Annealed, hot finished or cold finished | All | 80 | 551 | 35 | 241 | 30.0B | 50 |
| Annealed, strain-hardened | Up to 2 (50.8) incl | 90 | 620 | 60 | 415 | 15 | 40 |
The product of UNS N08020 alloy shall be furnished in the stabilized-annealed condition. The product of UNS N08026 alloy shall be furnished in the solution-annealed condition. The product of UNS N08024 alloy shall be furnished in the annealed condition.
NOTE 2-The recommended annealing temperatures all followed by quenching in water or rapidly cooling by other means are as follows: 1700 to 1850°F (927 to 1010°C) for UNS N08020, 2050 to 2200°F (1121 to 1204°C) for UNS N08026, and 1925 to 1975°F (1052 to 1079°C) for UNS N08024.
| S1 | Corrosion Tests for UNS N08020 |
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