ASTM B815-02(2011)
(Specification)Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy (UNS R31233) Rod
Standard Specification for Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy (UNS R31233) Rod
ABSTRACT
This specification covers cobalt-chromium-nickel-molybdenum-tungsten alloy (UNS R31233) in the form of a rod for wear applications and general corrosion service. The requirements for the chemical composition hardness and tolerance, tensile strength, yield strength, and elongation are specified.
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 ¾ 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 ¾ to 3½ 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 standard. The values given in parentheses are mathematical conversions to SI units that are provided for information only and are not considered standard.
1.4 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 Material Safety Data Sheet (MSDS) for this product/material as provided by the manufacturer, to establish appropriate safety and health practices, and determine the applicability of regulatory limitations prior to use.
General Information
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Standards Content (Sample)
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Designation:B815 −02(Reapproved 2011)
Standard Specification for
Cobalt-Chromium-Nickel-Molybdenum-Tungsten Alloy
(UNS R31233) Rod
This standard is issued under the fixed designation B815; 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.
1. Scope E8 Test Methods for Tension Testing of Metallic Materials
2 E29 Practice for Using Significant Digits in Test Data to
1.1 This specification covers cobalt-chromium-nickel-
Determine Conformance with Specifications
molybdenum-tungsten alloy UNS R31233 in the form of rod
E55 Practice for Sampling Wrought Nonferrous Metals and
for wear applications and general corrosion service.
Alloys for Determination of Chemical Composition
1.2 The following products are covered under this specifi-
E1473 Test Methods for Chemical Analysis of Nickel,
cation:
Cobalt, and High-Temperature Alloys
3 3
1.2.1 Rods ⁄16 to ⁄4 in. (9.76 to 19.05 mm) exclusive in
3. Terminology
diameter, hot or cold finished, solution-annealed, and pickled
or mechanically descaled; and
3.1 Definitions of Terms Specific to This Standard:
3 1
1.2.2 Rods ⁄4 to 3 ⁄2 in. (19.05 to 88.9 mm) inclusive in
3.1.1 rod, n—product of round solid section furnished in
diameter, hot or cold finished, solution annealed, ground, or
straight lengths.
turned.
4. Ordering Information
1.3 The values stated in inch-pound units are to be regarded
4.1 It is the responsibility of the purchaser to specify all
as standard. The values given in parentheses are mathematical
requirements that are necessary for material ordered under this
conversions to SI units that are provided for information only
specification. Examples of such requirements include, but are
and are not considered standard.
not limited to, the following:
1.4 This standard does not purport to address all of the
4.1.1 Alloy.
safety concerns, if any, associated with its use. It is the
4.1.2 Dimensions—Nominal diameter and length. The
responsibility of the user of this standard to become familiar
shortest usable multiple length shall be specified (Table 1).
with all hazards including those identified in the appropriate
4.1.3 Certification—State whether certification or a report
Material Safety Data Sheet (MSDS) for this product/material
of test results is required (Section 15).
as provided by the manufacturer, to establish appropriate
4.1.4 Purchaser Inspection—State which tests or inspec-
safety and health practices, and determine the applicability of
tions are to be witnessed (Section 13).
regulatory limitations prior to use.
4.1.5 Samples for Product (Check) Analysis—State whether
samples should be furnished (9.2.2).
2. Referenced Documents
5. Chemical Composition
2.1 ASTM Standards:
B880 Specification for General Requirements for Chemical
5.1 The material shall conform to the chemical composition
Check Analysis Limits for Nickel, Nickel Alloys and
requirements prescribed in Table 2.
Cobalt Alloys
5.2 If a product (check) analysis is made by the purchaser,
the material shall conform to the requirements specified in
1 Table 2 subject to the permissible tolerances given in Specifi-
This specification is under the jurisdiction of ASTM Committee B02 on
Nonferrous Metals and Alloys and is the direct responsibility of Subcommittee cation B880.
B02.07 on Refined Nickel and Cobalt and Their Alloys.
Current edition approved June 1, 2011. Published June 2011. Originally 6. Mechanical Properties and Other Requirements
approved in 1991. Last previous edition approved in 2006 as B815 – 02 (2006).
6.1 The mechanical properties of the material at room
DOI: 10.1520/B0815-02R11.
For ASME Boiler and Pressure Vessel Code applications, see related Specifi- temperature shall conform to those given in Table 3.
cation SB-815 in Section II of that code.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Dimensions, Mass, and Permissible Variations
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
7.1 Diameter—The permissible variations from the speci-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. fied diameter shall be as prescribed in Table 4.
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B815−02 (2011)
TABLE 1 Permissible Variations in Length of Rods
7.6 Weight—For the purposes of calculating the weight of
Random mill lengths 2 to 12 ft (610 to 3660 mm) long with not more than the material covered by this specification, a density of 0.306
5 5
25 weight % under 4 ft (1.22 m).
lb/in. (8.48 g/cm ) shall be used.
Multiple lengths Furnished in multiples of a specified unit length,
within the length limits indicated above. For
7.7 Straightness— The maximum curvature (depth of
each multiple, an allowance of ⁄4 in. (6.35 mm)
chord)shallnotexceed0.050in.multipliedbythelengthofthe
shall be made for cutting, unless otherwise specified.
chordinfeet(0.04mmmultipliedbythelengthincentimetres).
At the manufacturer’s option, individual specified
unit lengths may be furnished.
Nominal lengths Specified nominal lengths having a range of not less
8. Workmanship, Finish, and Appearance
than 2 ft (610 mm) with no short lengths allowed.
Cut lengths A specified length to which all rods shall be cut with 8.1 The material shall be uniform in quality and condition,
a permissible variation of + ⁄8 in. (3.17 mm) − 0.
smooth, and free of injurious defects.
9. Sampling
TABLE 2 Chemical Requirements
9.1 Lots for Chemical and Mechanical Testing:
Element Composition Limits, %
9.1.1 A lot for chemical analysis shall consist of one heat.
Boron 0.015 max
9.1.2 A lot of bar for mechanical testing shall be defined as
Carbon 0.02–0.10
the material from one heat in the same condition and specified
Chromium 23.5–27.5
Iron 1.0–5.0
diameter.
Manganese 0.1–1.5
Molybdenum 4.0–6.0 9.2 Sampling for Chemical Analysis:
Nitrogen 0.03–0.12
9.2.1 A representative sample shall be obtained from each
Nickel 7.0–11.0
heat during pouring or subsequent processing.
Phosphorous 0.030 max
Sulfur 0.020 max
9.2.2 Product (check) analysis shall be wholly the respon-
Silicon 0.05–1.00
sibility of the purchaser.
Tungsten 1.0–3.0
A
Cobalt Remainder
9.3 Sampling for Mechanical Testing—A representative
A
See 12.1.1.
sample shall be taken from each lot of finished material.
10. Number of Tests and Retests
TABLE 3
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