ASTM B508-22

This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
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: B508 − 16 B508 − 22
Standard Specification for
Copper Alloy Strip for Flexible Metal Hose
This standard is issued under the fixed designation B508; 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*
1.1 This specification establishes the requirements for annealed copper-alloy strip for the manufacture of flexible metal hose
produced from Copper Alloy UNS Nos. C41100 and C50500.
1.1.1 The nominal compositions are as follows:
Copper Alloy Copper Zinc Tin
UNS No.
C41100 91.0 8.5 0.5
C50500 98.7 . 1.3
1.2 Units—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. Grain size is given in SI units.
1.3 The following precautionary statement pertains only to the test method portion, Section 13, 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.
1.3 The following safety hazard caveat pertains only to the test methods portion, Section 14, described in this specification:
1.3.1 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.
1.4 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.
2. Referenced Documents
2.1 ASTM Standards:
B601 Classification for Temper Designations for Copper and Copper Alloys—Wrought and Cast
This specification is under the jurisdiction of ASTM Committee B05 on Copper and Copper Alloys and is direct responsibility of Subcommittee B05.01 on Plate, Sheet,
and Strip.
Current edition approved April 1, 2016May 1, 2022. Published June 2016May 2022. Originally approved in 1969. Last previous edition approved in 20082016 as
B508 – 08.B508 –16. DOI: 10.1520/B0508-16.10.1520/B0508-22.
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’sstandard’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
B508 − 22
B846 Terminology for Copper and Copper Alloys
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Withdrawn 2010)
E112 Test Methods for Determining Average Grain Size
E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
E478 Test Methods for Chemical Analysis of Copper Alloys
3. Terminology
3.1 Definitions:
3.1.1 For definitions of terms related to copper and copper alloys, refer to Terminology B846.
4. Ordering Information
4.1 Include the following specific choices when placing orders for product under this specification, as applicable:
4.1.1 ASTM designation and year of issue,
4.1.2 Copper Alloy UNS designation (see Section 1 and Table 1),
4.1.3 Temper (see(Section 7.17 and Table 2),
4.1.4 Quantity, number of pieces or total weight of each alloy and size, and
4.1.5 Dimensions—Thickness and width; and length, if applicable (see 8.29.2 and 8.39.3).
4.1.6 How furnished—Coils (inside and outside diameters), pounds per inch of width; stock or specific lengths, with or without
ends;
4.1.7 Packing—Type of pallet, skid, or box: interleaving, banding, maximum weight, and so forth;
4.2 The following options are available but may not be included unless specified at the time of placing of the order when required:
4.2.1 Heat identification and traceability details;
4.2.2 Certification;
4.2.3 Mill Test Report;
4.2.4 Special surface condition requirements, if any (see 9.310.3).
5. Materials and Manufacture
5.1 Material:Materials:
TABLE 1 Chemical Requirements
Composition, %
Element Copper Alloy UNS Nos.
C41100 C50500
Copper 89.0–92.0 remainder
Tin 0.30–0.7 1.0–1.7
Phosphorus . 0.03–0.35
Iron, max 0.05 0.10
Lead, max 0.09 0.05
Zinc remainder 0.30 max
The last approved version of this historical standard is referenced on www.astm.org.
B508 − 22
TABLE 2 Grain Size Requirements
Temps Standard
Grain Size, mm
DesignationTemper
A
Nominal Minimum Maximum
Codes
OS050 0.050 0.035 0.090
OS035 0.035 0.025 0.050
OS025 0.025 0.015 0.035
B
OS015 0.015 0.025
A
Standard designationsTemper codes defined in Classification B601.
B
Although no minimum grain size is required, this material must be fully
recrystallized.
5.1.1 The materialmaterials of manufacture shall be cast bar, slab, cake, billet, or so forth of Copper Alloy UNS No. C41100 or
C50500 of such purity and soundness as to be suitable for processing into the products prescribed herein.
5.1.2 When specified in the contract or purchase order, that heat identification or traceability is required, the purchaser shall
specify the details desired.
NOTE 1—Because ofDue to the discontinuous nature of the processing of castings into wrought products, it is not always practical to identify specific
casting analysis with a specific quantity of finished material.
5.2 Manufacture:
5.2.1 The product shall be manufactured by such hot-working, cold-working, and annealing processes as to produce a uniform
wrought structure in the finished product.
5.2.2 The product shall be hot- or cold-worked to the finished size, and subsequently annealed, ifwhen required, to meet the temper
properties specified.
5.2.3 Edges—Slit edges shall be furnished unless otherwise specified in the contract or purchase order.
6. Chemical Composition
6.1 The material shall conform to the chemical composition requirements in Table 1 for the alloy copper [alloy] UNS No. specified
in the ordering information.
6.2 These composition limits do not preclude the presence of other elements. By agreement between the manufacturer and
purchaser, limits may be established and analysis required for unnamed elements.
6.3 For alloys in which zinc is listed as “remainder,” either copper or zinc may be taken as the difference of between the sum of
results of all other elements determined and 100 %.
6.4 When all elements in Table 1 are determined, the sum of results for Copper Alloy UNS C41100 shall be 99.7 % minimum and
99.5 % minimum for Copper Alloy UNS C50500.
7. Temper
7.1 The standard temper for products described in this specification are given in Table 2.
7.2 Annealed tempers OS015 to OS050.
8. Grain Size of Annealed Tempers
8.1 Grain size shall be the standard requirement for all product in the annealed tempers.
B508 − 22
8.2 The Acceptance or rejection based upon grain size shall depend only on the average grain size of a test specimen taken from
each of two samples sample portions of annealed material, as determined on a longitudinal cross section, and each specimen shall
be within the limit prescribed of the four nominal grain sizes listed in Table 2 when testeddetermined in accordance with ASTM
Standard Test MethodMethods E112.
8.3 In the case of thin-gage material 0.010 in. (0.25 mm) and under, there shall exist no less than six grains per stock thickness,
averaged for five locations one thickness apart.
9. Dimensions, Mass, and Permissible Variations
9.1 General—For the purpose of determining conformance with the dimensional requirements prescribed in this specification, any
measured value outside the specified limiting values for any dimension may be cause for rejection.
9.2 Thickness—The standard method of specifying thickness shall be in decimal fractions of an inch. For material 0.021 in. (0.533
mm) and under in thickness, it is recommended that the nominal thickness be stated not closer than the nearest 0.0005 in. (0.013
mm). For example, specify 0.0060.006 in. or 0.0065 in. (0.152(0.152 mm or 0.165 mm), but not 0.0063 in. (0.160 mm). For
material over 0.021 (0.533 mm) in thickness, it is recommended that the nominal thickness be stated not closer than the nearest
0.001 in. (0.025 mm). For example, specify 0.1280.128 in. or 0.129 in. (3.25(3.25 mm or 3.28 mm) but not 0.1285 in. (3.26 mm).
A list of preferred thickness is shown in Appendix X1. The thickness tolerances shall be those shown in Table 3.
9.3 Width—The width tolerances shall be those shown in Table 4.
9.4 Straightness—The straightness tolerances shall be those shown in Table 5.
10. Workmanship, Finish, and Appearance
10.1 The product shall be uniform in quality and soundness and free of internal and external defects. However, surface blemishes
free of defects, but blemishes of a nature that do not interfere with the intended application are acceptable.
TABLE 3 Thickness Tolerances
A
Thickness Tolerances, plus and minus, in.
Copper Alloy UNS No. C41100 Copper Alloy UNS No. C50500
Thickness, in. (mm)
Over 88 in. to 14 in., Over 1414 in. to 20 Over 88 in. to 14 in.,
8 in. and under in 8 in. and under in Over 14 to 20 in., incl
incl in., incl incl
Width in. (mm) Width in. (mm) in Width in. (mm)
in Width in. (mm) in Width in. (mm) in Width in. (mm)
0.004 (0.102) and under 0.0003 (0.008) 0.0006 (0.015) . 0.0004 (0.010) 0.0008 (0.020) .
Over 0.004 to 0.006 0.0004 (0.010) 0.0008 (0.020) 0.0013 (0.033) 0.0006 (0.015) 0.0010 (0.025) 0.0015 (0.038)
(0.102 to 0.152), incl
Over 0.006 to 0.009 0.0006 (0.015) 0.0010 (0.035) 0.0015 (0.038) 0.0008 (0.020) 0.0013 (0.033) 0.002 (0.051)
(0.152 to 0.229), incl
Over 0.009 to 0.013 0.0008 (0.020) 0.0013 (0.033) 0.0018 (0.046) 0.0010 (0.025) 0.0015 (0.038) 0.0025 (0.064)
(0.229 to 0.330), incl
Over 0.013 to 0.017 0.0010 (0.028) 0.0015 (0.038) 0.002 (0.051) 0.0013 (0.033) 0.002 (0.051) 0.0025 (0.064)
(0.330 to 0.432), incl
Over 0.017 to 0.021 0.0013 (0.033) 0.0018 (0.046) 0.002 (0.051) 0.0015 (0.038) 0.0025 (0.064) 0.003 (0.076)
(0.432 to 0.533), incl
Over 0.021 to 0.026 0.0015 (0.038) 0.002 (0.051) 0.0025 (0.064) 0.002 (0.051) 0.0025 (0.064) 0.003 (0.076)
(0.533 to 0.660), incl
Over 0.026 to 0.037 0.002 (0.051) 0.002 (0.051) 0.0025 (0.064) 0.0025 (0.064) 0.003 (0.076) 0.0035 (0.089)
(0.660 to 0.940), incl
Over 0.037 to 0.050 0.002 (0.051) 0.0025 (0.064) 0.003 (0.076) 0.003 (0.076) 0.0035 (0.089) 0.004 (0.102)
(0.940 to 1.270), incl
Over 0.050 to 0.073 0.0025 (0.064) 0.003 (0.076) 0.0035 (0.084) 0.0035 (0.089) 0.004 (0.102) 0.0045 (0.114)
(1.270 to 1.854), incl
Over 0.073 to 0.130 0.003 (0.076) 0.0035 (0.089) 0.004 (0.102) 0.004 (0.102) 0.0045 (0.114) 0.005 (0.127)
(1.854 to 3.302), incl
Over 0.130 to 0.188 0.0035 (0.089) 0.004 (0.102) 0.0045 (0.114) 0.0045 (0.114) 0.005 (0.127) 0.006 (0.152)
(3.302 to 4.775), incl
A
When tolerances are specified as all plus or all minus, double the values given.
B508 − 22
TABLE 4 Width Tolerances
A
Width Tolerances, plus and minus, in. (mm)
For Thicknesses For Thicknesses For Thicknesses
Width, in. (mm) 0.004 (0.102 mm) Over 0.032 (0.813 Over 0.125 (3.18
to 0.032 in. (0.813 mm) to 0.125 in. mm) to 0.188 in.
mm), incl (3.18 mm), incl (4.78 mm), incl
2 (50.8) under 0.005 (0.13) 0.010 (0.25) 0.012 (0.30)
Over 2 to 8 (50.8 to 0.008 (0.20) 0.013 (0.33) 0.015 (0.38)
203), incl
1 1 1
Over 8 to 20 (203 ⁄64 (0.40) ⁄64 (0.40) ⁄64 (0.40)
to 508), incl
A
If tolerances are specified as all plus or all minus, double the values given.
TA
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