ASTM B872-96
(Specification)Standard Specification for Precipitation-Hardening Nickel-Iron-Chromium- Columbium (Nb)-Titanium-Aluminum Alloy (UNS N09908) Plate, Sheet, and Strip
Standard Specification for Precipitation-Hardening Nickel-Iron-Chromium- Columbium (Nb)-Titanium-Aluminum Alloy (UNS N09908) Plate, Sheet, and Strip
SCOPE
1.1 This specification covers rolled precipitation hardenable nickel-iron-chromium-columbium (Nb)-titanium-aluminum alloy (N09908) plate, sheet, and strip in the annealed condition (temper). This alloy is used as sheathing for super conductor cables, as tooling for fabrication of such cables, and for other applications requiring a material with low coefficient-of-expansion properties.
1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
General Information
Relations
Standards Content (Sample)
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
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Designation: B 872 – 96
Standard Specification for
Precipitation-Hardening Nickel-Iron-Chromium-Columbium
(Nb)-Titanium-Aluminum Alloy (UNS N09908) Plate, Sheet,
and Strip
This standard is issued under the fixed designation B 872; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
TABLE 1 Product Description
1. Scope
Product Thickness, in. (mm) Width
1.1 This specification covers rolled precipitation hardenable
A B
3 1
Hot-rolled plate ⁄16 to 2 ⁄4 (4.8 to 57.2) (Table 4) Table 6 and
nickel-iron-chromium-columbium (Nb)-titanium-aluminum al-
Table 7
loy (N09908) plate, sheet, and strip in the annealed condition
C
Cold-rolled sheet 0.010 to 0.250 (0.25 to 6.4), incl Table 8
(temper). This alloy is used as sheathing for super conductor
(Table 5)
C
Cold-rolled strip 0.005 to 0.250 (0.13 to 6.4), incl Table 8
cables, as tooling for fabrication of such cables, and for other
(Table 5)
applications requiring a material with low coefficient-of-
A
3 1
Material ⁄16 to ⁄4 in. (4.8 to 6.4 mm), incl, in thickness may be furnished as
expansion properties.
sheet or plate provided the material meets the specification requirements for the
1.2 The values stated in inch-pound units are to be regarded
condition ordered.
B
Hot-rolled plate, in widths 10 in. (250 mm) and under, may be furnished as
as the standard. The values given in parentheses are for
hot-finished rectangles with sheared or cut edges provided the mechanical
information only.
property requirements of this specification are met.
C
Material under 48 in. (1219 mm) in width may be furnished as sheet or strip
2. Referenced Documents
provided the material meets the specification requirements for the condition
ordered.
2.1 ASTM Standards:
E 8 Test Methods for Tension Testing of Metallic Materials
4.1.6 Quantity.
E 29 Practice for Using Significant Digits in Test Data to
4.1.7 Optional Requirements:
Determine Conformance with Specifications
4.1.7.1 Sheet and Strip—Whether to be furnished in coil, in
E 228 Test Method for Linear Thermal Expansion of Solid
cut straight lengths, or in random straight lengths.
Materials with a Vitreous Silica Dilatometer
4.1.7.2 Strip—Whether to be furnished with commercial slit
E 1473 Test Methods for Chemical Analysis of Nickel,
edge, square edge, or round edge.
Cobalt, and High-Temperature Alloys
3. Terminology
TABLE 2 Chemical Requirements
3.1 Definitions of Terms Specific to This Standard:
Product (Check) Analysis
3.1.1 The terms given in Table 1 shall apply. Composition Limits, % Variations, Under min or
Element
N09908 Over max, of the Specified
Limit of Element
4. Ordering Information
Nickel 47.0 min 0.35
4.1 Orders for material under this specification should
51.0 max 0.35
include the following information:
Chromium 3.75 min 0.10
4.5 max 0.10
4.1.1 Alloy—Name or UNS number (see Table 2).
A
Iron remainder .
4.1.2 ASTM designation and year of issue.
Manganese, max 1.0 0.03
4.1.3 Condition—See 6.1 and Appendix X1.
Carbon, max 0.03 0.01
Copper, max 0.5 0.03
4.1.4 Finish—See Appendix X1.
Silicon, max 0.5 0.03
4.1.5 Dimensions—Thickness, width, and length.
Sulfur, max 0.005 0.003
Aluminum 0.75 min 0.10
1.25 max 0.10
Titanium 1.20 min 0.05
This specification is under the jurisdiction of ASTM Committee B-2 on
1.80 max 0.05
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
Columbium (Nb) 2.7 min 0.10
B02.07 on Refined Nickel and Cobalt, and Alloys Containing Nickel or Cobalt or
3.3 max 0.15
Both as Principal Constituents.
Phosphorus 0.015 max 0.005
Current edition approved May 10, 1996. Published June 1996.
2 Boron 0.012 max 0.005
Annual Book of ASTM Standards, Vol 03.01.
Cobalt 0.5 max 0.03
Annual Book of ASTM Standards, Vol 14.02.
4 A
Annual Book of ASTM Standards, Vol 03.06. Iron shall be determined arithmetically by difference.
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NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B 872
4.1.7.3 Plate—Whether to be furnished specially flattened 7.2.1 Plate—The permissible variations in width of rectan-
(see 7.7); also how plate is to be cut (see 7.2.1 and 7.3.2). gular plates and diameter of circular plates shall be as
4.1.8 Fabrication Details—Not mandatory but helpful to prescribed in Table 6 and Table 7.
the manufacturer: 7.2.2 Sheet and Strip—The permissible variations in width
4.1.8.1 Welding or Brazing—Process to be employed. for sheet and strip shall be as prescribed in Table 8.
4.1.8.2 Plate—Whether material is to be hot-formed. 7.3 Length:
4.1.9 Certification—State if certification or a report of test 7.3.1 Sheet and strip of all sizes may be ordered to cut
results is required (see Section 15). lengths, in which case a variation of ⁄8 in. (3.2 mm) over the
4.1.10 Samples for Product (Check) Analysis—Whether specified length shall be permitted.
samples should be furnished (see 5.2). 7.3.2 Permissible variations in length of rectangular plate
4.1.11 Purchaser Inspection—If the purchaser wishes to shall be as prescribed in Table 9.
witness the tests or inspection of material at the place of 7.4 Straightness:
manufacture, the purchase order must so state indicating which 7.4.1 The edgewise curvature (depth of chord) of flat sheet,
tests or inspections are to be witnessed (see Section 13). strip, and plate shall not exceed 0.05 in. multiplied by the
length of the product in feet (0.04 mm multiplied by the length
5. Chemical Composition
of the product in centimetres).
5.1 The material shall conform to the requirements as to 7.4.2 Straightness for coiled strip material is subject to
chemical composition prescribed in Table 2. agreement between the manufacturer and the purchaser.
5.2 If a product (check) analysis is performed by the 7.5 Edges:
purchaser, the material shall conform to the product (check) 7.5.1 When finished edges of strip are specified in the
contract or purchase order, the following descriptions shall
analysis variations prescribed in Table 2.
apply:
6. Mechanical and Other Requirements
7.5.1.1 Square-edge strip shall be supplied with finished
6.1 Tensile Properties—The material after precipitation edges, with sharp, square corners, and without bevel or
rounding.
hardening shall conform to the tensile properties prescribed in
Table 3. 7.5.1.2 Round-edge strip shall be supplied with finished
edges, semicircular in form, and the diameter of the circle
6.2 Coeffıcient of Thermal Expansion:
6.2.1 The mean coefficient of thermal expansion from 77°F forming the edge being equal to the strip thickness.
−6
(25°C) to 1292°F (700°C) shall not exceed 7.8 3 10 in./ 7.5.1.3 When no description of any required form of strip
−6
in./°F (14.0 3 10 cm/cm/°C). edge is given, it shall be understood that edges such as those
6.2.2 The inflection temperature shall not exceed 572°F resulting from slitting or shearing will be acceptable.
(300°C). 7.5.1.4 Sheet shall have sheared or slit edges.
7.5.1.5 Plate shall have sheared or cut (machined, abrasive-
7. Dimensions and Permissible Variations
cut, powder-cut, or inert-arc-cut) edges, as specified.
7.1 Thickness and Weight: 7.6 Squareness (Sheet)—For sheets of all thicknesses, the
7.1.1 Plate—The permissible variation under the specified angle between adjacent sides shall be 906 0.15° ( ⁄16 in. in 24
thickness and permissible excess in overweight shall not in.) (1.6 mm in 610 mm).
exceed the amounts prescribed in Table 4. 7.7 Flatness—Standard flatness tolerances for plate shall
7.1.1.1 For use with Table 4, plate shall be assumed to conform to the requirements prescribed in Table 10. “Specially
3 3
flattened” plate, when so specified, shall have permissible
weigh 0.292 lb/in. (8.08 g/cm ).
7.1.2 Sheet and Strip—The permissible variations in thick- variations in flatness as agreed upon between the manufacturer
and purchaser.
ness of sheet and strip shall be as prescribed in Table 5. The
thickness of strip and sheet shall be measured with the
8. Workmanship, Finish, and Appearance
micrometer spindle ⁄8 in. (9.5 mm) or more from either edge
8.1 The material shall be uniform in quality and temper,
for material 1 in. (25.4 mm) or over in width and at any place
smooth, commercially straight or flat, and free of injurious
on the strip under 1 in. in width.
imperfections.
7.2 Width or Diameter:
9. Sampling
A
TABLE 3 Tensile Properties for Plate, Sheet, and Strip
9.1 Lot—Definition:
Yield Strength Elongation in 2 in.
Nominal Thickness, Tensile Strength,
9.1.1 A lot for chemical analysis shall consist of one heat.
(0.2 % offset), or 50 mm (or 4D),
in. (mm) min, ksi (MPa)
min, ksi (MPa) min % 9.1.2 A lot for tension testing shall consist of all material
Up to 1.0 (25.4), incl 170 (1172) 120 (827) 12
from the same heat, nominal thickness, and condition.
Over 1.0 to 2.25 (25.4 170 (1172) 120 (827) 10
9.1.2.1 Where material cannot be identified by heat, a lot
to 57.2), incl
shall consist of not more than 500 lb (227 kg) of material in the
A
same thickness and condition, except for plates weighing over
Material shall be supplied in the annealed condition (temper). The manufac-
turer shall demonstrate that annealed material is capable of meeting the properties
500 lb, in which case only one specimen shall be taken.
prescribed in Table 3 after precipitation heat treatment. Precipitation heat treat-
9.2 Test Material Selection:
ment shall consist of heating to 1292°F (700°C), holding at temperature for 50 h,
and then air cooling. 9.2.1 Chemical Analysis—Representative samples shall be
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B 872
TABLE 4 Permissible Variations in Thickness and Overweight of Rectangular Plates
NOTE 1—All plates shall be ordered to thickness and not to weight per square foot (centimetre). No plates shall vary more than 0.01 in. (0.25 mm)
A
under the thickness ordered, and the overweight of each lot in each shipment shall not exceed the amount in the table. Spot grinding is permitted to
remove surface imperfections, such spots not to exceed 0.01 in. (0.25 mm) under the specified thickness.
BC
Permissible Excess in Average Weight per Square Foot of Plates for Widths Given in Inches (Millimetres) Expressed in Percent-
age of Nominal Weights
Specified Thickness,
48 to 60 60 to 72 72 to 84 84 to 96 96 to 108 108 to 120 120 to 132 132 to 144 144 to 160
in. (mm)
Under 48
(1220 to (1520 to (1830 to (2130 to (2440 to (2740 to (3050 to (3350 to (3660 to
(1220)
1520), excl 1830), excl 2130), excl 2440), excl 2740), excl 3050), excl 3350), excl 3660), excl 4070), incl
3 5
⁄16 to ⁄16 (4.8 to 7.9), excl 9.0 10.5 12.0 13.5 15.0 16.5 18.0 . . .
5 3
⁄16 to ⁄8 (7.9 to 9.5), excl 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0 . .
3 7
⁄8 to ⁄16 (9.5 to 11.1), excl 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0 19.5
7 1
⁄16 to ⁄2 (11.1 to 12.7), excl 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5 18.0
1 5
⁄2 to ⁄8 (12.7 to 15.9), excl 5.0 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0 16.5
5 3
⁄8 to ⁄4 (15.9 to 19.1), excl 4.5 5.5 6.0 7.0 7.5 9.0 10.5 12.0 13.5 15.0
⁄4 to 1 (19.1 to 25.4), excl 4.0 4.5 5.5 6.0 7.0 7.5 9.0 10.5 12.0 13.5
1to2 ⁄4 (25.4 to 57.2), incl 5.0 5.0 5.5 6.5 7.0 8.0 8.5 10.0 11.5 13.0
A
The term “lot” applied to this table means all of the plates of each group width and each group thickness.
B
The permissible overweight for lots of circular and sketch plates shall be 25 % greater than the amounts given in this table.
C
The weight of individual plates shall not exceed the nominal weight by more than 1 ⁄4 times the amount given in this table and Table Footnote B.
TABLE 5 Permissible Variations in Thickness of Sheet and Strip
NOTE 1—Permissible variations, plus and minus, in thickness, in. (mm), for widths given in in. (mm).
Sheet
Hot-Rolled Cold-Rolled
Specified Thickness, in. (mm)
Over 48 to 60 (1220 to 1520), Over 48 to 60 (1220 to
A A
48 (1220) and Under 48 (1220) and Under
A A
incl 1520), incl
0.018 to 0.025 (0.46 to 0.64), incl 0.003 (0.08) 0.004 (0.10) 0.002 (0.05) 0.003 (0.08)
Over 0.025 to 0.034 (0.64 to 0.86), incl 0.004 (0.10) 0.005 (0.13) 0.003 (0.08) 0.004 (0.10)
Over 0.034 to 0.043 (0.86 to 1.1), incl 0.005 (0.13) 0.006 (0.15) 0.004 (0.10) 0.005 (0.13)
Over 0.043 to 0.056 (1.1 to 1.4), incl 0.005 (0.13) 0.006 (0.15) 0.004 (0.10) 0.005 (0.13)
Over 0.056 to 0.070 (1.4 to 1.8), incl 0.006 (0.15) 0.007 (0.18) 0.005 (0.13) 0.006 (0.15)
Over 0.070 to 0.078 (1.8 to 2.0), incl 0.007 (0.18) 0.008 (0.20) 0.006 (0.15) 0.007 (0.18)
Over 0.078 to 0.093 (2.0 to 2.4), incl 0.008 (0.20) 0.009 (0.23) 0.007 (0.18) 0.008 (0.20)
Over 0.093 to 0.109 (2.4 to 2.8), incl 0.009 (0.23) 0.010 (0.25) 0.007 (0.18) 0.009 (0.23)
Over 0.109 to 0.125 (2.8 to 3.2), incl 0.010 (0.25) 0.012 (0.31) 0.008 (0.20) 0.010 (0.25)
Over 0.125 to 0.140 (3.2 to 3.6), incl 0.012 (0.31) 0.014 (0.36) 0.008 (0.20) 0.010 (0.25)
Over 0.140 to 0.171 (3.6 to 4.3), incl 0.014 (0.36) 0.016 (0.41) 0.009 (0.23) 0.012 (0.31)
Over 0.171 to 0.187 (4.3 to 4.8), incl 0.015 (0.38) 0.017 (0.43) 0.010 (0.25) 0.013 (0.33)
Over 0.187 to 0.218 (4.8 to 5.5), incl 0.017 (0.43) 0.019 (0.48) 0.011 (0.28) 0.015 (0.38)
Over 0.218 to 0.234 (5.5 to 5.9), incl 0.018 (0.46) 0.020 (0.51) 0.012 (0.31) 0.016 (0.41)
Over 0.234 to 0.250 (5.9 to 6.4), incl 0.020 (0.51) 0.022 (0.56) 0.013 (0.33) 0.018 (0.46)
Cold-Rolled Strip
A
Specified Thickness, in. (mm) Widths 12 in. (305 mm) and Under, 6
Up to 0.050 (1.3), incl 0.0015 (0.04)
Over 0.050 to 0.093 (1.3 to 2.4), incl 0.0025 (0.06)
B
Over 0.093 to 0.125 (2.4 to 3.2), incl 0.004 (0.11)
A
Measured ⁄8 in. (9.5 mm) or more from either edge except for strip under 1 in. (25.4 mm) in width, which is measured at any place.
B
Standard sheet tolerances apply for thicknesses over 0.125 in. (3.2 mm) and for all thicknesses of strip over 12 in. (305 mm) wide.
taken during pouring or subsequent processing. the annealed condition (temper). The specimen shall be trans-
9.2.1.1 Product (Check) Analysis shall be wholly the re- verse to the direction of rolling when width will permit. The
sponsibility of the purchaser. test specimen shall be precipitation heat treated (see Table 3)
9.2.2 Tension and Coeffıcient of Thermal Expansion prior to testing.
Testing—Samples of the material to provide test specimens for
11.2 Tension test specimens shall be any of the stan
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