ASTM B691

This specification covers iron-nickel-chromiummolybdenum alloys (UNS N08366 and UNS N08367)* in the form of hot-finished and cold-finished rounds, squares, hexagons, octagons, and rectangles.

Element UNS N08366 UNS N08367

Mechanical Properties

Tensile Strength,
min, ksi (Mpa)
Yield Strength, 0.2 %
offset, min, ksi (Mpa)
Elongation in 2 in
or 50 mm, or 4D, min %
N08366 N08367 N08366 N08367 N08366 N08367
Cold-Finished-Annealed and Hot- Finished-Annealed (All Sizes)
75 (517) 95 (655) 30 (206) 45 (310) 30 30
Forging Quality All Sizes
A A A A A A
Note A: No tensile properties are required on forging quality.