ASTM B248-22

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: B248 − 17 B248 − 22
Standard Specification for
General Requirements for Wrought Copper and Copper-
Alloy Plate, Sheet, Strip, and Rolled Bar
This standard is issued under the fixed designation B248; 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 general requirements common to several wrought product specifications. Unless otherwise
specified in the purchase order or in an individual specification, these general requirements shall apply to copper and copper-alloy
plate, sheet, strip, and rolled bar supplied under each of the following product specifications issued by ASTM: B19, B36/B36M,
B96/B96M, B101, B103/B103M, B121/B121M, B122/B122M, B130, B152/B152M, B169/B169M, B194, B370, B422/B422M,
B465, B534, B591, B592, B694, B740, B747, B768, B888/B888M, and B936.
1.2 Units—This specification is the companion specification to SI Specification B248M; therefore, no SI equivalents are shown
in this specification.
1.3 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 The following documents of the issue in effect on date of material purchase form a part of this specification to the extent
referenced herein:
2.2 ASTM Standards:
B19 Specification for Cartridge Brass Sheet, Strip, Plate, Bar, and Disks
B36/B36M Specification for Brass Plate, Sheet, Strip, And Rolled Bar
B96/B96M Specification for Copper-Silicon Alloy Plate, Sheet, Strip, and Rolled Bar for General Purposes and Pressure Vessels
B100 Specification for Wrought Copper-Alloy Bearing and Expansion Plates and Sheets for Bridge and Other Structural Use
B101 Specification for Lead-Coated Copper Sheet and Strip for Building Construction
B103/B103M Specification for Phosphor Bronze Plate, Sheet, Strip, and Rolled Bar
B121/B121M Specification for Leaded Brass Plate, Sheet, Strip, and Rolled Bar
This specification is under the jurisdiction of the ASTM Committee B05 on Copper and Copper Alloys and is the direct responsibility of Subcommittee B05.01 on Plate,
Sheet, and Strip.
Current edition approved Oct. 1, 2017May 1, 2022. Published November 2017May 2022. Originally approved in 1951. Last previous edition approved in 20122017 as
B248 – 12.B248 – 17. DOI: 10.1520/B0248-17.10.1520/B0248-22.
The UNS system for copper and copper alloys (see Practice E527) is a simple expansion of the former standard designation system accomplished by the addition of a
prefix “C” and a suffix “00.” The suffix can be used to accommodate composition variations of the base alloy.
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
B248 − 22
B122/B122M Specification for Copper-Nickel-Tin Alloy, Copper-Nickel-Zinc Alloy (Nickel Silver), and Copper-Nickel Alloy
Plate, Sheet, Strip, and Rolled Bar
B130 Specification for Commercial Bronze Strip for Bullet Jackets
B152/B152M Specification for Copper Sheet, Strip, Plate, and Rolled Bar
B169/B169M Specification for Aluminum Bronze Sheet, Strip, and Rolled Bar
B193 Test Method for Resistivity of Electrical Conductor Materials
B194 Specification for Copper-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B248M Specification for General Requirements for Wrought Copper and Copper-Alloy Plate, Sheet, Strip, and Rolled Bar
(Metric)
B370 Specification for Copper Sheet and Strip for Building Construction
B422/B422M Specification for Copper-Aluminum-Silicon-Cobalt Alloy, Copper-Nickel-Silicon-Magnesium Alloy, Copper-
Nickel-Silicon Alloy, Copper-Nickel-Aluminum-Magnesium Alloy, and Copper-Nickel-Tin Alloy Sheet and Strip
B465 Specification for Copper-Iron Alloy Plate, Sheet, Strip, and Rolled Bar
B534 Specification for Copper-Cobalt-Beryllium Alloy and Copper-Nickel-Beryllium Alloy Plate, Sheet, Strip, and Rolled Bar
B591 Specification for Copper-Zinc-Tin and Copper-Zinc-Tin-Iron-Nickel Alloys Plate, Sheet, Strip, and Rolled Bar
B592 Specification for Copper-Zinc-Aluminum-Cobalt Alloy, Copper-Zinc-Tin-Iron Alloy Plate, Sheet, Strip, and Rolled Bar
B694 Specification for Copper, Copper-Alloy, Copper-Clad Bronze (CCB), Copper-Clad Stainless Steel (CCS), and Copper-
Clad Alloy Steel (CAS) Sheet and Strip for Electrical Cable Shielding
B740 Specification for Copper-Nickel-Tin Spinodal Alloy Strip
B747 Specification for Copper-Zirconium Alloy Sheet and Strip
B768 Specification for Copper-Cobalt-Beryllium Alloy and Copper-Nickel-Beryllium Alloy Strip and Sheet
B820 Test Method for Bend Test for Determining the Formability of Copper and Copper Alloy Strip
B846 Terminology for Copper and Copper Alloys
B888/B888M Specification for Copper Alloy Strip for Use in Manufacture of Electrical Connectors or Spring Contacts
B936 Specification for Copper-Chromium-Iron-Titanium Alloy Plate, Sheet, Strip and Rolled Bar
E8/E8M Test Methods for Tension Testing of Metallic Materials
E18 Test Methods for Rockwell Hardness of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E50 Practices for Apparatus, Reagents, and Safety Considerations for Chemical Analysis of Metals, Ores, and Related Materials
E53 Test Method for Determination of Copper in Unalloyed Copper by Gravimetry (Withdrawn 2022)
E54 Test Methods for Chemical Analysis of Special Brasses and Bronzes (Withdrawn 2002)
E62 Test Methods for Chemical Analysis of Copper and Copper Alloys (Photometric Methods) (Withdrawn 2010)
E75 Test Methods for Chemical Analysis of Copper-Nickel and Copper-Nickel-Zinc Alloys (Withdrawn 2010)
E106 Test Methods for Chemical Analysis of Copper-Beryllium Alloys (Withdrawn 2011)
E112 Test Methods for Determining Average Grain Size
E118 Test Methods for Chemical Analysis of Copper-Chromium Alloys (Withdrawn 2010)
E121 Test Methods for Chemical Analysis of Copper-Tellurium Alloys (Withdrawn 2010)
E255 Practice for Sampling Copper and Copper Alloys for the Determination of Chemical Composition
E478 Test Methods for Chemical Analysis of Copper Alloys
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
E1004 Test Method for Determining Electrical Conductivity Using the Electromagnetic (Eddy Current) Method
2.3 ASME Code:
ASME Boiler and Pressure Vessel Code
3. Terminology
3.1 For definitions of terms related to copper and copper alloys, see Terminology B846.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 lengths, mill, n—straight lengths, including ends, that can be conveniently manufactured in the mills. Full-length pieces are
usually 8, 10,8 ft, 10 ft, or 12 ft and subject to established length tolerances.
3.2.2 lengths, stock, n—straight lengths that are mill cut and stored in advance of orders. They are usually 8, 10,8 ft, 10 ft, or 12
ft and subject to established length tolerances.
The last approved version of this historical standard is referenced on www.astm.org.
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
www.asme.org.
B248 − 22
3.2.3 rolled bar, n—a rolled flat product over 0.188 in. thick and up to and including 12 in. wide, with sheared, sawed, or machined
edges, in straight lengths or coils (rolls).
4. Materials and Manufacture
4.1 Materials:
4.1.1 The material of manufacture shall be a cast bar, cake, or slab of such purity and soundness as to be suitable for processing
into the products to the product specification listed in Section 1.
4.1.2 When specified in the contract or purchase order that heat identification or traceability is required, the purchaser shall specify
the details desired.
4.2 Manufacture:
4.2.1 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.
4.2.2 The product shall be hot- or cold-worked to the finished size and subsequently annealed, when required, to meet the temper
properties specified.
4.3 Edges—The edges shall be slit, sheared, sawed, or rolled edges, as specified. Slit edges shall be furnished unless otherwise
specified in the contract or purchase order. See 5.6 for edge descriptions and corresponding tables for tolerances.
5. Dimensions, Weights, and Permissible Variations
5.1 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.
NOTE 1—Blank spaces in the tolerance tables indicate either that the material is not available or that no tolerances have been established.
5.2 Thickness—The standard method of specifying thickness shall be in decimal fractions of an inch. For material 0.021 in. and
under in thickness, it is recommended that the nominal thicknesses be stated not closer than the nearest half-thousandth. (For
example, specify 0.0060.006 in. or 0.0065 in., but not 0.0063 in.) For material over 0.021 in. in thickness, it is recommended that
the nominal thicknesses be stated not closer than the nearest thousandth. (For example, specify 0.1280.128 in. or 0.129 in., but not
0.1285 in.) A list of preferred thicknesses is shown in Appendix X1. The thickness tolerances shall be those shown in Tables 1-3
for the product specification indicated:
5.2.1 Table 1—Thickness tolerances applicable to Specifications B36/B36M, B103/B103M, B121/B121M, B152/B152M, B465,
B591, B592, B747, and B888/B888M.
5.2.2 Table 2—Thickness tolerances applicable to Specifications B96/B96M, B122/B122M, B169/B169M, B194, B422/B422M,
B534, B740, and B768.
5.2.3 Table 3—Special thickness tolerances applicable to Copper Alloy UNS No. C72500 when ordered to Specification
B122/B122M, and to Specifications B194, B534, B740, and B768 as noted in the table.
5.3 Width—The width tolerances shall be those shown in Tables 4-6, depending on the type of edge required (see 5.3.1, 5.3.2, and
5.3.3):
5.3.1 Table 4—Width tolerances for slit metal and slit metal with rolled edges.
5.3.2 Table 5—Width tolerances for square-sheared metal.
5.3.3 Table 6—Width tolerances for sawed metal.
B248 − 22
TABLE 1 Thickness Tolerances
(Applicable to Specifications B36/B36M, B103/B103M, B121/B121M, B152/B152M, B465, B591, B592, B747, B888/B888M, and B936)
A
Thickness Tolerances, plus and minus, in.
Strip Sheet
Over 8 to Over 12 to Over 14 to Over 24 to
Thickness, in.
Over 20 to Over 28 to Over 36 to Over 48 to
8 in. and 12 in., 14 in., 20 in., 28 in.,
24 in., 36 in., 48 in., 60 in.,
Under in Width incl, in incl, in incl, in incl, in
incl, in Width incl, in Width incl, in Width incl, in Width
Width Width Width Width
0.004 and under 0.0003 0.0006 0.0006 . . . . . . . . . . . . . . . . . .
Over 0.004 to 0.006, incl 0.0004 0.0008 0.0008 0.0013 . . . . . . . . . . . . . . .
Over 0.006 to 0.009, incl 0.0006 0.0010 0.0010 0.0015 . . . . . . . . . . . . . . .
Over 0.009 to 0.013, incl 0.0008 0.0013 0.0013 0.0018 0.0025 0.0025 0.003 0.0035 0.004
Over 0.013 to 0.017, incl 0.0010 0.0015 0.0015 0.002 0.0025 0.0025 0.003 0.0035 0.0045
Over 0.017 to 0.021, incl 0.0013 0.0018 0.0018 0.002 0.003 0.003 0.0035 0.004 0.005
Over 0.021 to 0.026, incl 0.0015 0.002 0.002 0.0025 0.003 0.003 0.0035 0.004 0.005
Over 0.026 to 0.037, incl 0.002 0.002 0.002 0.0025 0.0035 0.0035 0.004 0.005 0.006
Over 0.037 to 0.050, incl 0.002 0.0025 0.0025 0.003 0.004 0.004 0.005 0.006 0.007
Over 0.050 to 0.073, incl 0.0025 0.003 0.003 0.0035 0.005 0.005 0.006 0.007 0.008
Over 0.073 to 0.130, incl 0.003 0.0035 0.0035 0.004 0.006 0.006 0.007 0.008 0.010
Over 0.130 to 0.188, incl 0.0035 0.004 0.004 0.0045 0.007 0.007 0.008 0.010 0.012
Rolled Bar Plate
Over 0.188 to 0.205, incl 0.0035 0.004 0.004 0.0045 0.007 0.007 0.008 0.010 0.012
Over 0.205 to 0.300, incl 0.004 0.0045 0.0045 0.005 0.009 0.009 0.010 0.012 0.014
Over 0.300 to 0.500, incl 0.0045 0.005 0.005 0.006 0.012 0.012 0.013 0.015 0.018
Over 0.500 to 0.750, incl 0.0055 0.007 0.007 0.009 0.015 0.015 0.017 0.019 0.023
Over 0.750 to 1.00, incl 0.007 0.009 0.009 0.011 0.018 0.018 0.021 0.024 0.029
Over 1.00 to 1.50, incl 0.022 0.022 0.022 0.022 0.022 0.022 0.025 0.029 0.036
Over 1.50 to 2.00, incl 0.026 0.026 0.026 0.026 0.026 0.026 0.030 0.036 0.044
A
When tolerances are specified as all plus or all minus, double the values given.
TABLE 2 Thickness Tolerances
(Applicable to Specifications B96/B96M, B122/B122M, B169/B169M, B194, B422/B422M, B534, B740, and B768)
A
Thickness Tolerances, Plus and Minus, in.
Strip Sheet
Over 8 to
Thickness, in.
Over 12 to Over 14 to Over 20 to Over 24 to Over 28 to
8 in. and Un- 12 in., Over 36 to 48 in., Over 48 to 60 in.,
14 in., incl, 20 in., incl, 24 in., incl, in 28 in., incl, 36 in., incl, in
der in Width incl, in incl, in Width incl, in Width
in Width in Width Width in Width Width
Width
0.004 and under 0.0004 0.0008 0.0008 . . . . . . . . . . . . . . . . . .
Over 0.004 to 0.006, incl 0.0006 0.0010 0.0010 0.0015 . . . . . . . . . . . . . . .
Over 0.006 to 0.009, incl 0.0008 0.0013 0.0013 0.002 . . . . . . . . . . . . . . .
Over 0.009 to 0.013, incl 0.0010 0.0015 0.0015 0.0025 . . . . . . . . . . . . . . .
Over 0.013 to 0.017, incl 0.0013 0.002 0.002 0.0025 . . . . . . . . . . . . . . .
Over 0.017 to 0.021, incl 0.0015 0.0025 0.0025 0.003 . . . . . . . . . . . . . . .
Over 0.021 to 0.026, incl 0.002 0.0025 0.0025 0.003 0.004 0.004 0.005 0.006 0.007
Over 0.026 to 0.037, incl 0.0025 0.003 0.003 0.0035 0.005 0.005 0.006 0.007 0.008
Over 0.037 to 0.050, incl 0.003 0.0035 0.0035 0.004 0.006 0.006 0.007 0.008 0.010
Over 0.050 to 0.073, incl 0.0035 0.004 0.004 0.0045 0.007 0.007 0.008 0.010 0.012
Over 0.073 to 0.130, incl 0.004 0.0045 0.0045 0.005 0.008 0.008 0.010 0.012 0.014
Over 0.130 to 0.188, incl 0.0045 0.005 0.005 0.006 0.010 0.010 0.012 0.014 0.016
Rolled Bar Plate
Over 0.188 to 0.205, incl 0.0045 0.005 0.005 0.006 0.010 0.010 0.012 0.014 0.016
Over 0.205 to 0.300, incl 0.005 0.006 0.006 0.007 0.012 0.012 0.014 0.016 0.018
Over 0.300 to 0.500, incl 0.006 0.007 0.007 0.008 0.015 0.015 0.017 0.019 0.023
Over 0.500 to 0.750, incl 0.008 0.010 0.010 0.012 0.019 0.019 0.021 0.024 0.029
Over 0.750 to 1.00, incl 0.010 0.012 0.012 0.015 0.023 0.023 0.026 0.030 0.037
Over 1.00 to 1.50, incl 0.028 0.028 0.028 0.028 0.028 0.028 0.032 0.037 0.045
Over 1.50 to 2.00, incl 0.033 0.033 0.033 0.033 0.033 0.033 0.038 0.045 0.055
A
When tolerances are specified as all plus or all minus, double the values given.
5.4 Length—The material shall be furnished in coils or straight lengths of plate, sheet, strip, or rolled bar as specified. The length
tolerances for straight lengths shall be those shown in Tables 7-10, depending on the method of cutting required (see 5.4.1 – 5.4.4).
When ends are permitted, the length and quantity of the ends shall be in accordance with the schedule in Table 8.
5.4.1 Table 7—Length tolerances, for straight lengths.
B248 − 22
TABLE 3 Special Thickness Tolerances
Tolerances
Tolerances
Applicable
Applicable to
to Copper Alloy
Specifications B194,
UNS No. C72500,
B534,
Specification
Thickness, in.
B740, and B768
B122/B122M
Tolerances,
Tolerances,
A
Plus and Minus, in.,
A
Plus and Minus, in.,
for Strip 4 in.
for Strip 8 in.
and Under in Width
and Under in Width
0.004 and under 0.0002 0.0002
Over 0.004 to 0.006, incl 0.0003 0.0003
Over 0.006 to 0.009, incl 0.0004 0.0005
Over 0.009 to 0.013, incl 0.0005 0.0006
Over 0.013 to 0.017, incl 0.0007 0.0007
Over 0.017 to 0.021, incl 0.0008 0.0008
Over 0.021 to 0.026, incl 0.0010 0.0010
Over 0.026 to 0.032, incl 0.0013 0.0010
Over 0.032 to 0.050, incl 0.0015 . . .
A
If tolerances are specified as all plus or all minus, double the values given.
TABLE 4 Width Tolerances for Slit Metal and Slit Metal with
Rolled Edges
(Applicable to all specifications listed in 1.1)
A
Width Tolerances, Plus and Minus, in.
For For For For
Width, in.
Thicknesses Thicknesses Thicknesses Thicknesses
0.004 Over 0.032 Over 0.125 Over 0.188
to 0.032 in. to 0.125 in. to 0.188 in. to 0.500 in.
2 and under 0.005 0.010 0.012 0.015
Over 2 to 8, incl 0.008 0.013 0.015 0.015
1 1 1 1
Over 8 to 24, incl ⁄64 ⁄64 ⁄64 ⁄32
1 1 1 3
Over 24 to 50, incl ⁄32 ⁄32 ⁄32 ⁄64
A
If tolerances are specified as all plus or all minus, double the values given.
TABLE 5 Width Tolerances for Square-Sheared Metal
(Applicable to all specifications listed in 1.1)
NOTE 1—All lengths up to 120 in., incl.
A
Width Tolerances, Plus and Minus, in.
1 1
⁄16 in. Over ⁄16
Width, in. 1
Over ⁄8 in.
and Under to ⁄8 in., incl,
in Thickness
in Thickness in Thickness
1 3 1
20 and under ⁄32 ⁄64 ⁄16
3 3 1
Over 20 to 36, incl ⁄64 ⁄64 ⁄16
1 1 1
Over 36 to 120, incl ⁄16 ⁄16 ⁄16
A
If tolerances are specified as all plus or all minus, double the values given.
TABLE 6 Width Tolerances for Sawed Metal
(Applicable to all specifications listed in 1.1)
A
Width Tolerances, Plus and Minus, in.
For Lengths Over
For Lengths Up to 10 ft, incl
Width, in.
10 ft.
For Thicknesses For Thicknesses
All Thicknesses
1 1
Up to 1 ⁄2 in., incl Over 1 ⁄2 in.
1 1 1
Up to 12, incl ⁄32 ⁄16 ⁄16
1 1 1
Over 12 to 120, incl ⁄16 ⁄16 ⁄16
A
If tolerances are specified as all plus or all minus, double the values given.
5.4.2 Table 8—Schedule of minimum length and maximum weight of ends for mill lengths specific lengths with ends, and stock
lengths with ends.
B248 − 22
TABLE 7 Length Tolerances for Straight Lengths
(Applicable to all specifications listed in 1.1 except B694)
NOTE 1—The following length tolerances are all plus; if all minus
tolerances are desired, use the same values; if tolerances are desired plus
and minus, halve the values given.
Length Tolerances
Length ft.
in.
Specific lengths, mill lengths, ⁄4
multiple lengths, and specific lengths
with ends 10 and under
Over 10 to 20, incl ⁄2
A
Stock lengths and stock lengths with ends 1
A
As stock lengths are cut and placed in stock in advance of orders, departure from
the tolerance is not practicable.
5.4.3 Table 9—Length tolerances for square-sheared metal in all widths 120 in. and under.
5.4.4 Table 10—Length tolerances for sawed metal.
5.5 Straightness—The straightness tolerances, which are the maximum edgewise curvature (depth of arc) in any 72-in. portion of
the total length, shall be those shown in Tables 11-13, depending on the type of edge required.
5.5.1 Table 11—Straightness tolerances for metal as slit, or as slit and straightened, or as slit and edge-rolled, or metal with drawn
edges.
5.5.2 Table 12—Straightness tolerances for square-sheared metal.
5.5.3 Table 13—Straightness tolerances for sawed metal.
5.6 Edges—When rolled edges are required, they may be produced by either rolling or drawing to one of the following specified
edge contours:
5.6.1 Square Edges (Square Corners)—Edges shall have commercially squared corners and with a maximum corner radius as
prescribed in Table 14.
5.6.2 Rounded Corners—Edges shall have rounded corners as shown in Fig. 1 with a radius as prescribed in Table 15.
5.6.3 Rounded Edges—Edges shall be rounded as shown in Fig. 2 with a radius as prescribed in Table 16.
5.6.4 Full-Rounded Edges—Edges shall be full rounded as shown in Fig. 3 with a radius as prescribed in Table 17.
5.7 Weight Tolerances for Hot-Rolled Material:
5.7.1 Table 18—Lot weight tolerances for hot-rolled sheet and plate applicable to Specifications B36/B36M, B96/B96M (Copper
Alloy UNS No. C65500), B103/B103M, B122/B122M, B152/B152M, and B591.
5.7.2 The weight of each lot of five or more plates or sheets of the same type and the same specified dimensions when ordered
to thickness, shall not vary from the theoretical by more than the amount prescribed in Table 18 for the product specification
indicated. The weight of any individual plate or sheet may vary from the nominal by not more than one third in excess of the
tolerances prescribed in Table 18 for the product specification indicated. The tolerances for lots of less than five plates or sheets
shall be governed by the tolerances for individual plates or sheets.
5.7.3 For the purpose of calculation, the densities of the materials covered by these specifications are listed in Appendix X2.
B248 − 22
TABLE 8 Schedule of Minimum Length and Maximum Weight of Ends for Mill Lengths, Specific Lengths with Ends, and Stock Lengths
with Ends
(Applicable to all specifications listed in 1.1 except B694)
0.050 in. and Under Over 0.050 to 0.125 in., incl, Over 0.125 to 0.250 in., incl,
in Thickness in Thickness in Thickness
Maximum
Nominal Length, ft
Minimum Maximum Minimum Minimum Maximum
Permissible Weight of
Length of Permissible Weight of Length of Length of Permissible Weight of
Ends, % of Lot
Shortest Piece, ft Ends, % of Lot Weight Shortest Piece, ft Shortest Piece, ft Ends, % of Lot Weight
Weight
6 to 8, incl 4 20 4 25 3 30
8 to 10, incl 6 25 5 30 4 35
10 to 14, incl 7 30 6 35 5 40
TABLE 9 Length Tolerances for Square-Sheared Metal in All
Widths 120 in. and Under
(Applicable to all specifications listed in 1.1 except B694)
A
Length Tolerance, Plus and Minus, in.
For Thick- For Thicknesses
For Thick-
Length, in. 1 1
nesses Over ⁄16 to ⁄8
nesses
Up to ⁄16 in., in.,
Over ⁄8 in.
incl incl
1 3 1
20 and under ⁄32 ⁄64 ⁄16
3 3 1
Over 20 to 36, incl ⁄64 ⁄64 ⁄16
1 1 1
Over 36 to 120, incl ⁄16 ⁄16 ⁄16
A
If tolerances are specified as all plus or all minus, double the values given.
TABLE 10 Length Tolerances for Sawed Metal
(Applicable to all specifications listed in 1.1 except B694)
NOTE 1—The following tolerances are all plus; if all minus tolerances
are desired, use the same values; if tolerances are desired plus and minus,
halve the values given.
Width, in. Length Tolerance, in.
Up to 120, incl ⁄4
TABLE 11 Straightness Tolerances for Slit Metal or Slit Metal
Either Straightened or Edge-Rolled
(Applicable to all specifications listed in 1.1)
Maximum Edgewise Curvature (Depth of Arc) in any 72-in. Portion of the Total
Length
Straightness Tolerance, in.
As Slit and Either
As Slit Only Straightened or Edge
Width, in.
Rolled
Shipped Flat, in Rolls,
Shipped in Rolls Shipped Flat
or on Bucks
1 3 1 1
Over ⁄4 to ⁄8, incl 2 1 ⁄2 ⁄2
3 1 1 1
Over ⁄8 to ⁄2, incl 1 ⁄2 1 ⁄2
1 3 1
Over ⁄2 to 1, incl 1 ⁄4 ⁄2
5 5 3
Over 1 to 2, incl ⁄8 ⁄8 ⁄8
1 1 3
Over 2 to 4, incl ⁄2 ⁄2 ⁄8
3 3 3
Over 4 ⁄8 ⁄8 ⁄8
6. Workmanship, Finish, and Appearance
6.1 The product shall be free of defects, but blemishes of a nature that do not interfere with the intended application are acceptable.
A superficial film of residual light lubricant is normally present and is acceptable unless otherwise specified.
7. Sampling
7.1 Sampling—The lot size, portion size, and selection of sample pieces shall be as follows:
B248 − 22
TABLE 12 Straightness Tolerances for Square-Sheared Metal
(Applicable to all specifications listed in 1.1)
(Not applicable to metal over 120 in. in length)
Maximum Edgewise Curvature (Depth of Arc) in any 72-in. Portion of the
Total Length
Straightness Tolerances, in.
Thickness, in.
Up to 10 in., incl, in
Over 10 in., in Width
Width
1 1 1
⁄8 and under ⁄16 ⁄32
1 3 1 3
Over ⁄8 to ⁄16 , incl ⁄8 ⁄64
3 1 1
Over ⁄16 ⁄8 ⁄16
TABLE 13 Straightness Tolerances for Sawed Metal
(Applicable to all specifications listed in 1.1)
(Not applicable to metal over 144 in. in length)
Maximum Edgewise Curvature (Depth of Arc) in any 72-in.72 in. Portion of
the Total Length
Width, in. Straightness Tolerances, in.
3 and under ⁄16
Over 3 ⁄64
TABLE 14 Tolerances for Radius of Commercially Square
Corners of Rolled or Drawn Edges with Square Corners
(Applicable to all specifications listed in 1.1 except B694)
Permissible Radius of Corners,
Thickness, in.
max, in.
0.032 to 0.064, incl 0.010
Over 0.064 to 0.188, incl 0.016
Over 0.188 to 1, incl ⁄32
NOTE 1—The arc of the rounded corner shall not necessarily be tangent at points “A,” but the product shall be commercially free from sharp, rough,
or projecting edges.
FIG. 1 Rounded Corners
TABLE 15 Tolerances for Radius on Corners of Rolled or Drawn
Edges with Rounded Corners
(Applicable to all specifications listed in 1.1 except B694)
Radius of Corners, in.
Thickness, in.
Min Max
A
Up to 0.125, incl . . . . . .
Over 0.125 to 0.188, incl 0.016 0.048
Over 0.188 to 1, incl 0.031 0.094
Over 1 to 2, incl 0.063 0.188
A
Not available.
7.1.1 Lot Size—An inspection lot shall be 10 000 lb or less material of the same mill form, alloy, temper, and nominal dimensions,
subject to inspection at one time or shall be the product of one cast bar from a single melt charge, whose weight shall not exceed
25 000 lb and that has been continuously processed and subject to inspection at one time.
7.1.2 Portion Size—A portion shall be two representative samples taken from the product of one cast bar that has been continually
processed to the finished temper and dimensions.
B248 − 22
NOTE 1—The arc of the rounded edge shall be substantially symmetrical with the axis of the product. The corners “A” will usually be sharp but shall
not have rough or projecting edges.
FIG. 2 Rounded Edge
TABLE 16 Tolerances for Radius of Rolled or Drawn Rounded
Edges
(Applicable to all specifications listed in 1.1 except B694)
A
Radius of Edges
Thickness, in.
Min Max
3 3
Up to 0.188, incl ⁄4 t 1 ⁄4 t
Over 0.188 1 t 1 ⁄2 t
A
The t refers to the measured thickness of the test specimen.
NOTE 1—The arc of the rounded edge shall not necessarily be tangent at points “A” but shall be substantially symmetrical with the axis of the product,
and the product shall be commercially free from sharp, rough, or projecting edges.
FIG. 3 Full Rounded Edge
TABLE 17 Tolerances for Radius of Rolled or Drawn Full-
Rounded Edges
(Applicable to all specifications listed in 1.1 except B694)
A
Radius of Edges
Thickness, in.
Min Max
1 3
All thicknesses ⁄2 t ⁄4 t
A
The t refers to the thickness of the test specimen.
7.1.2.1 Chemical Analysis—A sample for chemical analysis shall be taken in accordance with Practice E255 for product in its final
form. Unless otherwise required by the purchaser, at the time the order is placed, the manufacturer shall have the option of
determining conformance to chemical composition by analyzing samples taken at the time the castings are poured or samples taken
from the semi-finished product if heat identity can be maintained throughout all operations. If the manufacturer determines the
chemical composition during manufacture, he shall not be required to sample and analyze the finished product. The minimum
weight of the composite sample in accordance with Practice E255 shall be as follows:
W
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