ASTM B670-07(2018)
(Specification)Standard Specification for Precipitation-Hardening Nickel Alloy (UNS N07718) Plate, Sheet, and Strip for High-Temperature Service
Standard Specification for Precipitation-Hardening Nickel Alloy (UNS N07718) Plate, Sheet, and Strip for High-Temperature Service
ABSTRACT
This specification covers rolled precipitation hardening nickel alloy (UNS N07718) plate, sheet, and strip in the annealed condition (temper) for high-temperature service. The material shall conform to the chemical requirements for carbon, manganese, silicon, phosphorus, sulfur, chromium, cobalt, molybdenum, columbium, niobium, tantalum, titanium, aluminum, iron, copper, nickel, and boron. The material after precipitation hardening shall conform to the mechanical property requirements for tensile strength, yield strength, and elongation. Stress-rupture test shall be performed in accordance to referenced ASTM documents itemized herein.
SCOPE
1.1 This specification covers rolled precipitation hardenable nickel alloy (N07718)2 plate, sheet, and strip in the annealed condition (temper).
1.2 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to become familiar with all hazards including those identified in the appropriate Safety Data Sheet (SDS) for this product/material as provided by the manufacturer, to establish appropriate safety, health, and environmental practices, and determine the applicability of regulatory limitations prior to use.
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
General Information
Relations
Standards Content (Sample)
This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation:B670 −07 (Reapproved 2018)
Standard Specification for
Precipitation-Hardening Nickel Alloy (UNS N07718) Plate,
Sheet, and Strip for High-Temperature Service
This standard is issued under the fixed designation B670; 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 (´) indicates an editorial change since the last revision or reapproval.
This standard has been approved for use by agencies of the U.S. Department of Defense.
1. Scope Rolled Nickel and Nickel Alloys Plate, Sheet, and Strip
E29 Practice for Using Significant Digits in Test Data to
1.1 This specification covers rolled precipitation hardenable
2 Determine Conformance with Specifications
nickel alloy (N07718) plate, sheet, and strip in the annealed
E139 Test Methods for Conducting Creep, Creep-Rupture,
condition (temper).
and Stress-Rupture Tests of Metallic Materials
1.2 The values stated in inch-pound units are to be regarded
as standard. The values given in parentheses are mathematical
3. Terminology
conversions to SI units that are provided for information only
3.1 Description of Terms Specific to This Standard—The
and are not considered standard.
terms given in Table 1 shall apply.
1.3 This standard does not purport to address all of the
safety concerns, if any, associated with its use. It is the
4. General Requirements
responsibility of the user of this standard to become familiar
4.1 Material furnished under this specification shall con-
with all hazards including those identified in the appropriate
form to the applicable requirements of Specification B906
Safety Data Sheet (SDS) for this product/material as provided
unless otherwise provided herein.
by the manufacturer, to establish appropriate safety, health,
and environmental practices, and determine the applicability
5. Ordering Information
of regulatory limitations prior to use.
5.1 It is the responsibility of the purchaser to specify all
1.4 This international standard was developed in accor-
requirements that are necessary for material ordered to this
dance with internationally recognized principles on standard-
specification. Examples of such requirements include, but are
ization established in the Decision on Principles for the
not limited to, the following:
Development of International Standards, Guides and Recom-
5.1.1 Alloy—Name or UNS number (see Table 2).
mendations issued by the World Trade Organization Technical
5.1.2 ASTM designation, including year of issue.
Barriers to Trade (TBT) Committee.
5.1.3 Condition—See 7.1 and Appendix X1.
5.1.4 Finish—Specification B906 or Appendix X1.
2. Referenced Documents
5.1.5 Dimensions—Thickness, width, and length.
2.1 ASTM Standards:
5.1.6 Quantity:
B637 Specification for Precipitation-Hardening and Cold
5.1.7 Optional Requirements:
Worked Nickel Alloy Bars, Forgings, and Forging Stock
5.1.7.1 Sheet and Strip—Whether to be furnished in coil, in
for Moderate or High Temperature Service
cut straight lengths, or in random straight lengths.
B906 Specification for General Requirements for Flat-
5.1.7.2 Strip—Whether to be furnished with commercial slit
edge, square edge, or round edge.
5.1.7.3 Plate—Whether to be furnished specially flattened
This specification is under the jurisdiction of ASTM Committee B02 on
(see 8.7); also how plate is to be cut (see 8.2.1 and 8.3.2).
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
B02.07 on Refined Nickel and Cobalt and Their Alloys.
5.1.8 Fabrication Details—Not mandatory but helpful to
Current edition approved Nov. 1, 2018. Published November 2018. Originally
the manufacturer:
approved in 1972. Last previous edition approved in 2013 as B670 – 07 (2013).
5.1.8.1 Welding or Brazing—Process to be employed.
DOI: 10.1520/B0670-07R18.
5.1.8.2 Plate—Whether material is to be hot-formed.
Designation established in accordance with ASTM E527 and SAE J1086,
Practice for Numbering Metals and Alloys (UNS).
5.1.9 Certification—State if certification or a report of test
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
results is required (see Specification B906).
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1.10 Samples for Product (Check) Analysis—Whether
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. samples should be furnished (see 6.2).
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
B670−07 (2018)
A
TABLE 1 Product Description TABLE 3 Tensile Properties for Plate, Sheet, and Strip
Yield Strength Elongation in 2
Product Thickness, in. (mm) Width
Tensile
Nominal Thickness, (0.2 % offset), in.or50mm
A
3 1
Hot-rolled plate ⁄16 to 2 ⁄4 (4.8 to 57.2) (B906, B906, Tables A3.2 Strength min,
in. (mm) min, ksi (or 4D),
B
Table A3.1) and A3.5 ksi (MPa)
(MPa) min, %
C
Cold-rolled sheet 0.010 to 0.250 (0.25 to 6.4), incl B906, Table A3.6
N07718
(B906, Table A3.3)
Up to 1.0 (25.4), incl 180 (1241) 150 (1034) 12
0.005 to 0.250 (0.13 to 6.4), incl
(B906, Table A3.3)
C
Over 1.0 to 2.25 180 (1241) 150 (1034) 10
Cold-rolled strip . B906, Table A3.6
(25.4 to 57.2), incl
A
3 1
Material ⁄16 to ⁄4in.(4.8to6.4mm),incl,inthicknessmaybefurnishedassheet
A
Material shall be supplied in the annealed condition (temper). The manufacturer
or plate provided the material meets the specification requirements for the
shall demonstrate that annealed material is capable of meeting the properties
condition ordered.
B
prescribed in Table 3 after precipitation heat treatment. For UNS N07718,
Hot-rolled plate, in widths 10 in. (250 mm) and under, may be furnished as
precipitation heat treatment shall consist of heating to 1325 ± 25°F (718 ± 14°C),
hot-finishedrectangleswithshearedorcutedgesinaccordancewithSpecification
hold at temperature for 8 h, furnace cool to 1150 ± 25°F (621 ± 14°C), hold until
B637, UNS N07718, provided the mechanical property requirements of this
total precipitation heat treatment time has reached 18 h, and then air cool.
specification are met.
C
Material under 48 in. (1219 mm) in width may be furnished as sheet or strip
provided the material meets the specification requirements for the condition
ordered.
TABLE 4 Stress-Rupture Test at 1200°F (649°C) for Plate, Sheet,
A
and Strip
Elongation in
TABLE 2 Chemical Composition
B
Nominal Thickness, Stress, ksi Life, min, 2 in. or 50
(MPa)
in. (mm) h mm (or 4D),
Element Composition,%
min, %
Carbon 0.08 max
N07718
Manganese 0.35 max
Up to 0.015 (0.38), incl 95 (655) 23 .
Silicon 0.35 max
Over 0.015 to 0.025 (0.38 to 95 (655) 23 4
Phosphorus 0.015 max
0.64), incl
Sulfur 0.015 max
Over 0.025 to 1.5 (0.64 to 100 (690) 23 4
Chromium 17.0 to 21.0
A
38.1), incl
Cobalt 1.0 max
A
Molybdenum 2.80 to 3.30
Material shall be supplied in the annealed condition (temper). The manufacturer
Columbium (Nb) + tantalum 4.75 to 5.50
shall demonstrate that annealed material is capable of meeting the properties
Titanium 0.65 to 1.15
prescribed in Table 4 after precipitation heat treatment. Precipitation heat treat-
Aluminum 0.20 to 0.80
ment is as specified in footnote A of Table 3.
B
B
Iron remainder
Testing may be conducted at a stress higher than that specified but stress shall
Copper 0.30 max
not be changed while test is in process. Time to rupture and elongation require-
Nickel 50.0 to 55.0
ments shall be as specified in Table 4.
Boron 0.006 max
Testing may also be conducted using incremental loading. In such case, the
stress specified in Table 4 shall be maintained to rupture or for 48 h, whichever
A
If determined.
B occurs first. After the 48 h and at intervals of 8 to 16 h, preferably 8 to 10 h,
Iron shall be determined arithmetically by difference.
thereafter, the stress shall be increased in increments of 5000 psi (34.5 MPa).
Time to rupture and elongation requirements shall be as specified in Table 4.
5.1.11 Purchaser Inspection—If the purchaser wishes to
8.1.1 Plate—The permissible variation under the specified
witness the tests or inspection of material at the place of
thickness and permissible excess in overweight shall not
manufacture, the purchase order must so state indicating which
exceed the amounts prescribed in Specification B906,
tests or inspections are to be witnessed (see Specification
Table A3.1.
B906).
8.1.1.1 For use with Specification B906, Table A3.1, , plate
3 3
shall be assumed to weigh 0.296 lb/in. (8.19 g/cm ).
6. Chemical Compositio
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