ASTM B815-97

Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy (UNS R31233) Rod

SCOPE
1.1 This specification covers cobalt-chromium-nickel-molybdenum-tungsten alloy UNS R31233 in the form of rod for wear applications and general corrosion service.
1.2 The following products are covered under this specification:
1.2.1 Rods 3/16 to 3/4 in. (9.76 to 19.05 mm) exclusive in diameter, hot or cold finished, solution-annealed, and pickled or mechanically descaled; and
1.2.2 Rods 3/4 to 3 1/2 in. (19.05 to 88.9 mm) inclusive in diameter, hot or cold finished, solution annealed, ground, or turned.
1.3 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

• Status: Historical
• Publication Date: 09-Apr-1997
• ICS: 77.150.70 - Cadmium and cobalt products
• Technical Committee: B02 - Nonferrous Metals and Alloys
• Drafting Committee: B02.07 - Refined Nickel and Cobalt and Their Alloys

Relations

• Replaced By: ASTM B815-02 - Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy (UNS R31233) Rod
• Effective Date: 10-Oct-2002

Standards Content (Sample)

NOTICE: This standard has either been superseded and replaced by a new version or discontinued.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 815 – 97
Standard Specification for
Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy (UNS
R31233) Rod
This standard is issued under the fixed designation B 815; 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 Examples of such requirements include, but are not limited to,
the following:
1.1 This specification covers cobalt-chromium-nickel-
4.1.1 Alloy.
molybdenum-tungsten alloy UNS R31233 in the form of rod
4.1.2 Dimensions—Nominal diameter and length. The
for wear applications and general corrosion service.
shortest usable multiple length shall be specified (Table 1).
1.2 The following products are covered under this specifi-
4.1.3 Certification— State whether certification or a report
cation:
3 3 of test results is required (Section 15).
1.2.1 Rods ⁄16to ⁄4 in. (9.76 to 19.05 mm) exclusive in
4.1.4 Purchaser Inspection—State which tests or inspec-
diameter, hot or cold finished, solution-annealed, and pickled
tions are to be witnessed (Section 13).
or mechanically descaled; and
3 1 4.1.5 Samples for Product (Check) Analysis—State whether
1.2.2 Rods ⁄4to 3 ⁄2 in. (19.05 to 88.9 mm) inclusive in
samples should be furnished (9.2.2).
diameter, hot or cold finished, solution annealed, ground, or
turned.
5. Chemical Composition
1.3 The values stated in inch-pound units are to be regarded
5.1 The material shall conform to the chemical composition
as the standard. The values given in parentheses are for
requirements prescribed in Table 2.
information only.
5.2 If a product (check) analysis is made by the purchaser,
2. Referenced Documents the material shall conform to the requirements specified in
Table 2 subject to the permissible tolerances given in Table 3.
2.1 ASTM Standards:
E 8 Test Methods for Tension Testing of Metallic Materials
6. Mechanical Properties and Other Requirements
E 29 Practice for Using Significant Digits in Test Data to
3 6.1 The mechanical properties of the material at room
Determine Conformance with Specifications
temperature shall conform to those given in Table 4.
E 55 Practice for Sampling Wrought Nonferrous Metals and
Alloys for Determination of Chemical Composition
7. Dimensions, Mass, and Permissible Variations
E 1473 Test Methods for Chemical Analysis of Nickel,
5 7.1 Diameter—The permissible variations from the speci-
Cobalt, and High-Temperature Alloys
fied diameter shall be as prescribed in Table 5.
3. Terminology 7.2 Out-of-Roundness— The permissible variation in
roundness shall be as prescribed in Table 5.
3.1 Definitions of Terms Specific to This Standard:
7.3 Machining Allowances—When the surfaces of finished
3.1.1 rod—product of round solid section furnished in
material are to be machined, the following allowances are
straight lengths.
suggested for normal machining operations:
4. Ordering Information 7.3.1 As-Finished (Annealed and Descaled)—For diameters
5 11
of ⁄16to ⁄16 in. (7.94 to 17.46 mm) inclusive, an allowance of
4.1 It is the responsibility of the purchaser to specify all
⁄16in. (1.59 mm) on the diameter should be made for finish
requirements that are necessary for the safe and satisfactory
machining.
performance of material ordered under this specification.
7.4 Length:
7.4.1 Unless multiple, nominal, or cut lengths are specified,
This specification is under the jurisdiction of ASTM Committee B-2 on
random mill lengths shall be furnished.
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee
7.4.2 The permissible variations in length of multiple,
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved Apr. 10, 1997. Published February 1998. Originally
nominal, or cut length rod shall be as prescribed in Table 1.
published as B 815 – 91. Last previous edition B 815 – 91.
Where rods are ordered in multiple lengths, a ⁄4-in. (6.35-mm)
Annual Book of ASTM Standards, Vol 03.01.
length addition shall be permitted for each uncut multiple
Annual Book of ASTM Standards, Vol 14.02.
Annual Book of ASTM Standards, Vol 03.05. length.
Annual Book of ASTM Standards, Vol 03.06.
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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.
B 815
TABLE 1 Permissible Variations in Length of Rods
the material covered by this specification, a density of 0.306
3 3
Random mill lengths 2 to 12 ft (610 to 3660 mm) long with not more than lb/in. (8.48 g/cm ) shall be used.
25 weight % under 4 ft (1.22 m).
7.7 Straightness— The maximum curvature (depth of
Multiple lengths Furnished in multiples of a specified unit length,
chord) shall not exceed 0.050 in. multiplied by the length of the
within the length limits indicated above. For
each multiple, an allowance of ⁄4 in. (6.35 mm)
chord in feet (0.04 mm multiplied by the length in centimetres).
shall be made for cutting, unless otherwise specified.
At the manufacturer’s option, individual specified
8. Workmanship, Finish, and Appearance
unit lengths may be furnished.
8.1 The material shall be uniform in quality and condition,
Nominal lengths Specified nominal lengths having a range of not less
than 2 ft (610 mm) with no short lengths allowed.
smooth, and free of injurious defects.
Cut lengths A specified length to which all rods shall be cut with
a permissible variation of + ⁄8 in. (3.17 mm) − 0.
9. Sampling
9.1 Lots for Chemical and Mechanical Testing:
9.1.1 A lot for chemical analysis shall consist of one heat.
TABLE 2 Chemical Requirements
9.1.2 A lot of bar for mechanical testing shall be defined as
Element Composition Limits, %
the material from one heat in the same condition and specified
Boron 0.015 max
diameter.
Carbon 0.02–0.10
9.2 Sampling for Chemical Analysis:
Chromium 23.5–27.5
Iron 1.0–5.0
9.2.1 A representative sample shall be obtained from each
Manganese 0.1–1.5
heat during pouring or subsequent processing.
Molybdenum 4.0–6.0
9.2.2 Product (check) analysis shall be wholly the respon-
Nitrogen 0.03–0.12
Nickel 7.0–11.0
sibility of the purchaser.
Phosphorous 0.030 max
9.3 Sampling for Mechanical Testing—A representative
Sulfur 0.020 max
sample shall be take
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