ASTM A887-20

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it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A887 − 89 (Reapproved 2014) A887 − 20
Standard Specification for
Borated Stainless Steel Plate, Sheet, and Strip for Nuclear
Application
This standard is issued under the fixed designation A887; 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 Scope*
1.1 This specification covers chromium-nickel stainless steel plate, sheet, and strip, modified by the addition of natural or
enriched boron, for nuclear application.
1.2 Borated stainless steels covered by this specification, because of their particular alloy content and specialized properties,
may require special care in their fabrication and welding. Specific procedures are of fundamental importance, and it is presupposed
that all parameters will be in accordance with approved methods capable of producing the desired properties in the finished
fabrication.
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 establish appropriate safety, health and environmental practices and determine the applicability of
regulatory limitations prior to use.
1.5 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.
2. Referenced Documents
2.1 ASTM Standards:
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
A480/A480M Specification for General Requirements for Flat-Rolled Stainless and Heat-Resisting Steel Plate, Sheet, and Strip
A751 Test Methods, Practices, and Terminology for Chemical Analysis of Steel Products
3. Terminology
3.1 Definitions of Terms Specific to This Standard:
3.1.1 plate—material ⁄16 in. (4.8 mm) and over in thickness and over 10 in. (250 mm) in width.
3.1.2 sheet—material under ⁄16 in. (5.0 mm) in thickness and 24 in. (600 mm) and over in width.
3.1.3 strip—material under ⁄16 in. (5.0 mm) in thickness and under 24 in. (600 mm) in width.
4. Ordering Information
4.1 Orders for material under this specification shall include the information specified in the Ordering Information section of
Specification A480/A480M.
3. Process General Requirements
5.1 If a specific type of melting is required by the purchaser, it shall be stated on the purchase order.
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.17
on Flat-Rolled and Wrought Stainless Steel.
Current edition approved March 1, 2014July 1, 2020. Published April 2014July 2020. Originally approved in 1988. Last previous edition approved in 20092014 as
A887 – 89 (2009).A887 – 89 (2014). DOI: 10.1520/A0887-89R14.10.1520/A0887-20.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A887 − 20
3.1 When specified on the purchase order, or when a specific type of melting has been specified on the purchase order, the
material manufacturer shall indicate on the test report the type of meltingThe following requirements for orders for material
furnished under this specification shall conform to the applicable requirements of the current edition of Specification
A480/A480Mused to produce the material. .
3.1.1 Definitions,
3.1.2 General requirements for delivery,
3.1.3 Ordering information,
3.1.4 Process,
3.1.5 Dimensions and permissible variations,
3.1.6 Workmanship, finish, and appearance,
3.1.7 Retreatment,
3.1.8 Inspection,
3.1.9 Rejection and rehearing,
3.1.10 Material test report,
3.1.11 Certification, and
3.1.12 Packaging, marking, and loading.
4. Heat Treatment
4.1 The austenitic chromium-nickel steels shall be solution-annealed to meet the mechanical property requirements of this
specification. Solution-annealing shall consist of heating the material to a temperature of 1900°F (1040°C)1900 °F (1040 °C)
minimum for an appropriate time followed by water quenching or rapidly cooling by other means.
7. Material Test Report
7.1 A report of the results of all tests required by this specification and the type of melting used shall be supplied to the
purchaser.
5. Chemical Composition
5.1 The chemical analysis of representative material shall be performed, as agreed upon between the purchaser and supplier, to
determine the percentages of the elements identified in Table 1. The chemical composition thus determined shall be reported to
the purchaser, or his representative, and shall conform to the requirements specified in Table 1.
5.2 When a product (check or verification) analysis is performed, the chemical composition thus determined may vary from the
specified limits by the amounts shown in Table 1, Product Analysis Tolerances, of Specification A480/A480M.
5.3 Methods and practices relating to chemical analysis required by this specification shall be in accordance with Test Methods,
Practices, and Terminology A751.
5.4 Boron determination not covered in Test Methods, Practices, and Terminology A751 shall be made as agreed upon between
the purchaser and the supplier.
6. Mechanical Properties
6.1 Tensile Properties—The material shall conform to the tensile property requirements specified in Table 2.
6.2 Hardness—The material shall conform to the hardness requirements as specified in Table 2.
6.3 Grade—The grade of the material is defined by the uniformity of the dispersion of the boron within the melt. Grade A
corresponds to the near-optimal dispersion, while Grade B corresponds to a less-than-optimal dispersion of the boron.
A
TABLE 1 Chemical Requirements Composition
UNS Other
Type Carbon Manganese Phosphorous Sulfur Silicon Chromium Nickel Boron
B
Designation Elements
S30460 304B 0.08 2.00 0.045 0.030 0.75 18.00–20.00 12.00–15.00 0.20–0.29 N 0.10 max
S30461 304B1 0.08 2.00 0.045 0.030 0.75 18.00–20.00 12.00–15.00 0.30–0.49 N 0.10 max
S30462 304B2 0.08 2.00 0.045 0.030 0.75 18.00–20.00 12.00–15.00 0.50–0.74 N 0.10 max
S30463 304B3 0.08 2.00 0.045 0.030 0.75 18.00–20.00 12.00–15.00 0.75–0.99 N 0.10 max
S30464 304B4 0.08 2.00 0.045 0.030 0.75 18.00–20.00 12.00–15.00 1.00–1.24 N 0.10 max
S30465 304B5 0.08 2.00 0.045 0.030 0.75 18.00–20.00 12.00–15.00 1.25–1.49 N 0.10 max
S30466 304B6 0.08 2.00 0.045 0.030 0.75 18.00–20.00 12.00–15.00 1.50–1.74 N 0.10 max
S30467 304B7 0.08 2.00 0.045 0.030 0.75 18.00–20.00 12.00–15.00 1.75–2.25 N 0.10 max
A
Maximum, unless range or minimum is indicated.
B
Cobalt concentration shall be limited to 0.2 max,maximum, unless a lower concentration is agreed upon between the purchaser and the supplier.
A887 − 20
TABLE 2 Mechanical Test Requirements
Elongation in
Tensile Strength, min Yield Strength, min Hardness, max
UNS 2 in. or 50 mm,
Type Grade
Designation 2 in. or 50 mm,
ksi MPa ksi MPa Brinell Rockwell B
min, %
S30460 304B A 75 515 30 205 40.0 201 92
B 75 515 30 205 40.0 201 92
S30461 304B1 A 75 515 30 205 40.0 201 92
B 75 515 30 205 35.0 201 92
S30462 304B2 A 75 515 30 205 35.0 201 92
B 75 515 30 205 27.0 201 92
S30463 304B3 A 75 515 30 205 31.0 201 92
B 75 515 30 205 19.0 201 92
S30464 304B4 A 75 515 30 205 27.0 217 95
B 75 515 30 205 16.0 217 95
S30465 304B5 A 75 515 30 205 24.0 217 95
B 75 515 30 205 13.0 217 95
S30466 304B6 A 75 515 30 205 20.0 241 100
B 75 515 30 205 9.0 241 100
B 75 515 30 205 9.0 241 100
S30467 304B7 A 75 515 30 205 17.0 241 100
B 75 515 30 205 6.0 241 100
B 75 515 30 205 6.0 241 100
Conventional wrought metallurgical practice conforms to Grade B properties. The quality of the boron dispersion is measured
indirectly through the ductility requirements, as specified in Table 2.
7. Special Tests
7.1 If any special tests are required that are pertinent to the intended application of the material ordered, they shall be agreed
upon between the supplier and the purchaser.
7.2 Charpy V-notch impact testing is not required unless it is specified on the purchase orde
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