ASTM B409 Specification

This specification2 covers UNS N08120, UNS N08890, UNS N08800, UNS N08810, and UNS N08811* in the form of rolled plate, sheet, and strip. Alloy UNS N08800 is normally employed in service temperatures up to and including 1100°F (593°C). Alloys UNS N08120, UNS N08810, UNS N08811, and UNS N08890 are normally employed in service temperatures above 1100°F (593°C) where resistance to creep and rupture is required, and they are annealed to develop controlled grain size for optimum properties in this temperature range. The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.

Chemical Composition

Element Composition Limits, %
Alloy N08120 Alloy N08890 Alloys N08800, N08810, and N08811
Nickel 35.0 min
40.0 min
30.0 min
  39.0 max 45.0 max 35.0 max
Chromium 23.0 min 23.5 min 19.0 min
27.0 max 28.5 max 23.0 max
Iron remainderA remainder 39.5 minA
Manganese , max 1.5 1.5 1.5
Carbon 0.02 min - 0.10 max 0.06 min - 0.14 max B
Copper, max 0.50 0.75 0.75
Silicon, max 1.0 1.0 min - 2.0 max 1.0
Sulfur, max 0.03 0.015 0.015
Aluminumc 0.40 max 0.05 min - 0.60 max 0.15 min - 0.60 max
litaniumc 0.20 max 0.15 min - 0.60 max 0.15 min - 0.60 max
Columbium 0.4 min - 0.9 max ... ...
Molybdenum 2.50 max 1.0 min - 2.0 max ...
Niobium ... 1.0 max - 0.2 min ...
Tantalum ... 0.10 min ...
Phosphorus 0.040 max 0.60 max ...
Tungsten 2.50 max ... ...
Cobalt, max 3.0 ... ...
Nitrogen 0.15 min - 0.30 max ... ...
Boron 0.010 max ... ...
Note:

A. Iron shall be determined arithmetically by difference.
B. Alloy UNS N08800: 0.10 max.
Alloy UNS N08810: 0.05–0.10.
Alloy UNS N08811: 0.06–0.10.
C. Alloy UNS N08811: Al + Ti, 0.85–1.20.

Mechanical Properties for Plate, Sheet, and Strip (All thicknesses and sizes unless otherwise indicated)

Alloy Condition Tensile Strength, min, psi (MPa) Yield StrengthA (0.2 % offset), min, psi (MPa) Elongation in 2 in. or 50 mm (or 4D), min, %
Hot-Rolled Plate
UNS N08120 Annealed 90 000 (621) 40 000 (276) 30
UNS N08800 Annealed 75 000 (520) 30 000 (205) 30
UNS N08800 As-rolledB,C 80 000 (550) 35 000 (240) 25
UNS N08810 Annealed 65 000 (450) 25 000 (170) 30
UNS N08811 Annealed 65 000 (450) 25 000 (170) 30
UNS N08890 Annealed 75 000 (520) 30 000 (205) 35
Hot-Rolled Sheet
UNS N08120 Annealed 90 000 (621) 40 000 (276) 30
UNS N08800 Annealed 75 000 (520) 30 000 (205) 30
UNS N08810D Annealed 65 000 (450) 25 000 (170) 30
UNS N08811D Annealed 65 000 (450) 25 000 (170) 30
UNS N08890 Annealed 75 000 (520) 30 000 (205) 35
Cold-Rolled Sheet
UNS N08120 Annealed 90 000 (621) 40 000 (276) 30
UNS N08800 Annealed 75 000 (520) 30 000 (205) 30
UNS N08810D Annealed 65 000 (450) 25 000 (170) 30
UNS N08811D Annealed 65 000 (450) 25 000 (170) 30
UNS N08890 Annealed 75 000 (520) 30 000 (205) 35
Cold-Rolled Strip
UNS N08120 Annealed 90 000 (621) 40 000 (276) 30
UNS N08800 Annealed 75 000 (520) 30 000 (205) 30E
UNS N08810D Annealed 25 000 (450) 25 000 (170) 30
UNS N08811D Annealed 25 000 (450) 25 000 (170) 30
UNS N08890 Annealed 75 000 (520) 30 000 (205) 35
Note:

A. Yield strength requirements do not apply to material under 0.020 in. (0.51 mm) in thickness.
B. As-rolled plate may be given a stress-relieving heat treatment subsequent to final rolling.
C. As-rolled plate specified “suitable for hot forming” shall be furnished from heats of known good hot-malleability characteristics. The purchaser must specify Alloy UNS N08800 or UNS N08810. There are no applicable tensile or hardness requirements for such material.
D. Available only in thicknesses 0.115 in. (2.92 mm) and over.
E. Not applicable for thickness under 0.010 in. (0.25 mm).

Grain Size and Hardness for Alloy UNS N08800 Cold-Rolled, Deep-Drawing, and Spinning Quality Sheet and Strip

Thickness Calculated Diameter of Average Grain Section, max, in. (mm) Corresponding ASTM Micro Grain Size No. Rockwell BAB Hardness, max
Sheet (56 in. (1.42 m) Wide and Under)
0.050 (1.3) and less 0.0030 (0.075) 4.5 86
Over 0.050 to 0.250 (1.3 to 6.4), incl 0.0043 (0.110) 3.5 86
Strip (12 in. (305 mm) Wide and Under)C
0.005D to 0.010 (0.13 to 0.25), incl 0.0009 (0.022) 8E 88E
Over 0.010 to 0.125 (0.25 to 3.2), incl 0.0030 (0.075) 4.5 86
Note:

A. For Rockwell or equivalent hardness conversions see Hardness Conversion Tables E140.
B. Caution should be observed in using the Rockwell test on thin material, as the results may be affected by specimen thickness. For thicknesses under 0.050 in. (1.3 mm), the use of the Rockwell superficial or the Vickers hardness test is suggested.
C. Sheet requirements (above) apply to strip thicknesses over 0.125 in. (3.2 mm), and for all thicknesses of strip over 12 in. (305 mm) in width.
D. For ductility evaluations for strip under 0.005 in. (0.13 mm) in thickness, the spring-back test such as described in Test Method F 155, is often used and the manufacturer should be consulted.
E. Accurate grain size and hardness determinations are difficult to make on strip under 0.005 in. (0.13 mm) in thickness and are not recommended.