Forgings, Fasteners, Boltings, Stud Bolts, Screws, Nuts
ASTM B446 specification covers nickel-chromium molybdenum-columbium (UNS N06625), nickel-chromium molybdenum-silicon alloy (UNS N06219), and NickelChromium-Molybdenum-Tungsten Alloy (UNS N06650)1 in the form of hot-worked rod and bar and cold-worked rod in the conditions.
UNS N06625 products are furnished in two grades with respect to different heat-treated conditions:
Grade 1 (Annealed)-Material is normally employed in service temperatures up to 1100°F (593°C).
Grade 2 (Solution Annealed)-Material is normally employed in service temperatures above 1100°F (593°C) when resistance to creep and rupture is required.
NOTE 1-Hot-working or reannealing may change properties significantly, depending on working history and temperatures.
Alloys UNS N06219 and UNS N06650 are supplied in solution annealed condition only.
| Composition Limits, % | Element | ||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| UNS | C | Mn | Si | P | S | Cr | Nb + Ta | S (if determined) | Mo | Fe | Al | Ti | Cu | Ni A | W | N | |||
| N06625 | 0.10 max | 0.50 max | 0.50 max | 0.015 max | 0.015 max | 20.0 min | 23.0 max | 3.15 min | 4.15 max | 1.0 max | 8.0 min | 10.0 max | 5.0 max | 0.40 max | 0.40 max | ... | 58.0 min | ... | ... |
| N06219 | 0.05 max | 0.50 max | 0.70-1.10 | 0.020 max | 0.010 max | 18.0-22.0 | ... | ... | ... | 1.0 max | 7.0-9.0 | ... | 2.0-4.0 | 0.50 max | 0.50 max | 0.50 max | Bal. | ... | ... |
| N06650 | 0.03 max | 0.50 max | 0.50 max | 0.020 max | 0.010 max | 19.0-21.0 | ... | 0.05-0.50 | 1.0 max | 9.5-12.5 | ... | 12.0-16.0 | 0.05-0.50 | ... | 0.30 max | Bal. | 0.50-2.50 | 0.05-0.20 | |
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| UNS | Diameter or Distance Between Parallel Surfaces, in. (mm) |
Tensile Strength min, ksi (MPa) |
Yield Strength (0.2 % offset), min, ksi (MPa) |
Elongation in 2 in. or 50 mm or 4D, min, % |
|---|---|---|---|---|
| UNS N06625 Grade 1 (Annealed) B | Up to 4 (102), incl | 120 | 60 | 30 |
| Over 4 (102) to 10 (254), incl | 110 | 50 | 25 | |
| UNS N06625 Grade 2 (Solution Annealed) C | All sizes | 100 | 40 | 30 |
| UNS N06219 All (Solution Annealed) | All sizes | 96 (660) † | 39 (270) | 50 |
| UNS N06650 All (Solution Annealed) | All sizes | 116 (800) | 58 (400) | 45 |
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