Standard Specification for Copper-Beryllium Alloy Forgings and Extrusions Alloys C17500 and C17510

SCOPE
1.1 This specification establishes the requirements for copper-beryllium alloy forgings and extrusions. The following alloys are covered:  Copper Alloy Nominal Composition, % UNS No. Beryllium Cobalt Nickel C17500 0.59 2.6 C17510 0.40 1.8
1.2 The values stated in inch-pound units are the standard. Values given in parentheses are for information only.  
1.3 The following safety hazard caveat pertains to Sections 10 and 11 of this specification: 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 establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.

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Publication Date
31-Dec-1995
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ASTM B870-96 - Standard Specification for Copper-Beryllium Alloy Forgings and Extrusions Alloys C17500 and C17510
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NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: B 870 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Copper-Beryllium Alloy Forgings and Extrusions Alloys
C17500 and C17510
This standard is issued under the fixed designation B 870; 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.
1. Scope ably preheated billet or preform through an orifice (die) of the
desired cross section. Extrusions generally are furnished in
1.1 This specification establishes the requirements for
straight lengths.
copper-beryllium alloy forgings and extrusions. The following
3.2.2 forging, n—a metal part worked to a predetermined
alloys are covered:
shape by one or more such processes as hammering, upsetting,
Copper Alloy Nominal Composition, %
pressing, rolling, etc.
UNS No. Beryllium Cobalt Nickel
C17500 0.59 2.6
NOTE 1—Forged and extruded shapes in the context of this specifica-
C17510 0.40 1.8
tion are generally construed to be large section sized products; round,
1.2 The values stated in inch-pound units are the standard.
oval, half round, geometric custom ordered cross-sections, and nonsym-
Values given in parentheses are for information only.
metrical metal shapes. This is to generally differentiate products supplied
1.3 The following safety hazard caveat pertains to Sections according to this document as opposed to forged and extruded “Rod and
Bar” in Specification B 441.
9 and 10 of this specification: This standard does not purport
to address all of the safety concerns, if any, associated with its
4. Ordering Information
use. It is the responsibility of the user of this standard to
4.1 The contract or purchase order for product under this
establish appropriate safety and health practices and deter-
specification should include the following information:
mine the applicability of regulatory limitations prior to use.
4.1.1 ASTM designation and year of issue (for example, B
2. Referenced Documents
870 – 96),
4.1.2 Copper Alloy UNS No. (Section 1),
2.1 ASTM Standards:
4.1.3 Temper (Section 7) or condition (Section 10),
B 194 Specification for Copper-Beryllium Alloy Plate,
4.1.4 Drawing, when required, and
Sheet, Strip, and Rolled Bar
4.1.5 Quantity: number of pieces or pounds.
B 249 Specification for General Requirements for Wrought
4.2 The following requirements are optional under this
Copper and Copper-Alloy Rod, Bar, Shapes, and Forgings
specification and should be included in the contract or purchase
B 441 Specification for Copper-Cobalt-Beryllium (UNS
order.
No. 17500) and Copper-Nickel Beryllium (UNS No.
4.2.1 Tension tests (Section 9),
17510) Rod and Bar
4.2.2 Special marking or packaging (Section 23),
B 601 Practice for Temper Designations for Copper and
4.2.3 Inspection (Section 19),
Copper Alloys-Wrought and Cast
4.2.4 Certification (Section 21),
E 18 Test Methods for Rockwell Hardness and Rockwell
4.2.5 Mill test report (Section 22),
Superficial Hardness of Metallic Materials
4.2.6 Finish (Section 14), and
E 527 Practice for Numbering Metals and Alloys (UNS)
4.2.7 When material is purchased for agencies of the U.S.
3. Terminology
Government, this shall be specified in the contract or purchase
order, and the material shall conform to the supplementary
3.1 Definitions—General:
requirements as defined in the current issue of Specification
3.1.1 See Terminology B 846.
B 249.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 extrusion, n—a uniform metal shape, long in relation
5. Materials and Manufacture
to its cross-sectional dimensions, produced by forcing a suit-
5.1 Materials:
1 5.1.1 The material of manufacture should be a cast billet
This specification is under the jurisdiction of ASTM Committee B-5 on Copper
conforming to the chemical composition requirements for the
and Copper Alloys and is the direct responsibility of Subcommittee B05.02 on Rod,
Bar, Wire, Shapes, and Forgings.
alloy specified in the ordering information and shall be of such
Current edition approved April 10, 1996. Published June 1996.
purity and soundness as to be suitable for processing into the
Annual Book of ASTM Standards, Vol 02.01.
product prescribed herein.
Annual Book of ASTM Standards, Vol 03.01.
Annual Book of ASTM Standards, Vol 01.01.
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
B 870
TABLE 2 Electrical Conductivity
5.2 Manufacture:
5.2.1 The product shall be manufactured by hot working or Temper IACS, Min, %
TF00 (AT) 45
extrusion, solution heat treating, precipitation hardening and
straightening as may be necessary to meet the properties
specified.
10. Heat Treatment
10.1 The majority
...

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