ASTM B168 Specification

Scope

This specification2 covers rolled nickel-chromium-iron alloys (UNS N06600, N06601, N06603, N06690, N06693, N06025, and N06045)* and nickel-chromium-cobaltmolybdenum alloy (UNS N06617) plate, sheet, and strip. 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

ElementComposition Limits, %
Alloy N06600Alloy N06601Alloy N06617Alloy N06690Alloy N06693Alloy N06025Alloy N06045Alloy N06603
Nickel72.0 min58.0-63.044.5 min58.0 minremalnderAremalnderA45.0 minremainderA
Chromium14.0-17.021.0-25.020.0-24.027.0-31.027.0-31.024.0-26.026.0-29.024.0-26.0
Cobalt10.0-15.0
Molybdenum8.0-10.0
Niobium0.5-2.5
Iron6.0-10.0remainderA3.0 max7.0-11.02.5-6.08.0-11.021.0-25.08.0-11.0
Manganese1.0 max1.0 max1.0 max0.5 max1.0 max0.15 max1.0 max0.15 max
Aluminum1.0-1.70.8-1.52.5-4.01.8-2.42.4-3.0
Carbon0.15 max0.10 max0.05-0.150.05 max0.15 max0.15-0.250.05-0.120.20-0.40
Copper0.5 max1.0 max0.5 max0.5 max0.5 max0.1 max0.3 max0.50 max
Silicon0.5 max0.5 max1.0 max0.5 max0.5 max0.5 max2.5-3.00.50 max
Sulfur0.015 max0.015 max0.015 max0.015 max0.01 max0.010 max0.010 max0.010 max
Titanium0.6 max1.0 max0.1-0.20.01-0.25
Phosphorus0.020 max0.020 max0.020 max
Zirconium0.01-0.100.01-0.10
Yttrium0.05-0.120.01-0.15
Boron0.006 max
Nitrogen
Cerium0.03-0.09

Note :

A. Element shall be determined arithmetically by difference.

Mechanical Properties for Plate, Sheet, and Strip (All Thicknesses and Sizes Unless Otherwise Indicated)

Condition (Temper)Tensile Strength, min, psi (MPa)Yield StrengthA (0.2 % offset), min, psi (MPa)Elongation in 2 in. or 50 mm (or 4D), min,%Rockwell HardnessB,C
Hot-Rolled Plate
UNS N06600:    
Annealed80 000 (550)35 000 (240)30….
As·rolledD,E85 000 (586)35 000 (240)30
UNS N06601:    
Annealed80 000 (550)30 000 (205)30
UNS N06603:    
Annealed94 000 (650)43 000 (300)25
UNS N06617:    
Annealed95 000 (655)35 000 (240)35
UNS N06690:    
Annealed85 000 (586)35 000 (240)30
As·rolledD,E85 000 (586)35 000 (240)30
AnnealedF75  000 (514)30 000 (206)30
UNS N06693    
Annealed100 000 (690)50 000 (345)30
UNS N06025    
Annealed98 000 (680)39 000 (270)30
UNS N06045    
Annealed90 000 (620)35 000 (240)35
Hot-Rolled Sheet
UNS N06600:    
Annealed80 000 (550)35 000 (240)30
UNS N06601:    
Annealed80 000 (550)30 000 (205)30
UNS N06603:    
Annealed94 000 (650)43 000 (300)25
UNS N06617:    
Annealed95 000 (655)35 000 (240)30
UNS N06690:    
Annealed85 000 (586)35 000 (240)30
UNS N06693:    
Annealed100 000 (690)50 000 (345)30
UNS N06025:    
Annealed98 000 (680)39 000 (270)30
UNS N06045:    
Annealed90 000 (620)35 000 (240)35
Cold-Rolled Plate
UNS N06603    
Annealed94 000 (650)43 000 (300)25
UNS N06025    
Annealed98 000 (680)39 000 (270)30
UNS N06045    
Annealed90 000 (620)35 000 (240)35
Cold-Rolled Sheet
UNS N06600:    
Annealed80 000 (SSO)G35 000 (240)30G
Hard125 000 (860)G90 000 (620)2G
UNS N06601:    
Annealed80 000 (SSO)G30 000 (205)30G
UNS N06603:    
Annealed94 000 (650)43 000 (300)25G
UNS N06617:    
Annealed95  000 (655)G35 000 (240)25G
UNS N06690:    
Annealed85 000 (586)G35 000 (240)30G
Hard125  000 (860)G90 000 (620)2G
UNS N06693    
Annealed100 000 (690)so 000 (345)30
UNS N06025    
Annealed98 000 (680)39 000 (270)30
UNS N06045    
Annealed90 000 (620)35 000 (240)35
Cold-Rolled Strip
UNS N06600:    
Annealed80 000 (SSO)G35 000 (240)30G
Skin-hard885 to 688
Quarter-hard888 to 694
Half·harct693 to 698
Three-quarter-hard
Hard
125  000 (860)G90 000 (620)2G697 to C25
SpringC30 min
UNS N06601:    
Annealed80 000 (SSO)G30 000 (205)30G
UNS N06603:    
Annealed94 000 (650)43 000 (300)25G
UNS N06617:    
Annealed95  000 (655)G35 000 (240)30G
UNS N06690:    
Annealed85 000 (586)G35 000 (240)30G
Skin-hard885 to 688
Quarter-hard888 to 694
Half-hard693 to 698
Three-quarter-hard
Hard
125  000 (860)G90 000 (620)2G697 to C25
SpringC30 min
UNS N06693:    
Annealed100 000 (690)50 000 (345)30
UNS N06025:    
Annealed98 000 (680)39 000 (270)30
UNS N06045:    
Annealed90 000 (620)35 000 (240)35

Note :

A. Yield strength requirements do not apply to material under 0.020 in. (0.51 mm) in thickness.
B. For Rockwell or equivalent hardness conversions, see Hardness Conversion Tables E 140.
C. Caution should be served 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.
D. As-rolled plate may be given a stress relieving heat treatment subsequent to final rolling.
E. As-rolled plate specified “suitable for hot forming” shall be furnished from heats of known good hot-malleability characteristics. There are no applicable
tensile or hardness requirements for such material.
F. Annealed at 1850°F (1010°C) minimum.
G. Not applicable for thickness under 0.010 in. (0.25 mm).

Grain Size and Hardness for Cold-Rolled, DeepDrawing, and Spinning-Quality Sheet and Strip

Thickness, in. (mm)Calculated Diameter of Average Grain Section, max, in. (mm)Corresponding ASTM MicroGrain Size No.Rockwell BA,B Hardness, max
Sheet (56 in. (1.42 m) Wide and Under)
0.050 (1.3) and less0.0030 (0.075)4.586
Over 0.050 to 0.250 (1.3 to 6.4), incl0.0043 (0.110)3.586
Strip (12 in. (305 mm) Wide and Under)C
0.005D to 0.010 (0.13 to 0.25), incl0.0009 (0.022)8E88E
Over 0.010 to 0.125 (0.25 to 3.2), incl0.0030 (0.075)4.586

Note:

A. For Rockwell or equivalent hardness conversions, see Hardness Conversion Tables E 140.
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 thicknessess over 0.125 in. (3.2 mm), and for all thicknessess 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 springback 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.