ASTM A254-97

NOTICE: This standard has either been superseded and replaced by a new version or
withdrawn. Contact ASTM International (www.astm.org) for the latest information.
Designation: A 254 – 97 An American National Standard
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
1
Copper-Brazed Steel Tubing
This standard is issued under the fixed designation A 254; 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.
This standard has been approved for use by agencies of the Department of Defense. Consult the DoD Index of Specifications and
Standards for the specific year of issue which has been adopted by the Department of Defense.
1. Scope
1.1 This specification covers double-wall, copper-brazed
steel tubing suitable
for general engineering uses, particularly in the automotive,
refrigeration, and stove industries for fuel lines, brake lines, oil
Single-Strip Type Double-Strip Type
FIG. 1 Brazed Tubing, Double-Wall, 360-deg Brazed Construction
lines, heating and cooling units, and the like.
1.2 The values stated in inch-pound units are to be regarded
as the standard.
3.1.7 External coating, where required (see Section 7 and
Supplementary Requirement S2), and
2. Referenced Documents
3.1.8 Special or supplementary requirements or exceptions
2.1 ASTM Standards:
to specification.
A 370 Test Methods and Definitions for Mechanical Testing
2
of Steel Products
4. Manufacture
E 30 Test Methods for Chemical Analysis of Steel, Cast
4.1 The steel may be made by any process.
3
Iron, Open-Hearth Iron, and Wrought Iron
4.2 If a specific type of melting is required by the purchaser,
E 59 Practice for Sampling Steel and Iron for Determination
it shall be as stated on the purchase order.
4
of Chemical Composition
4.3 The primary melting may incorporate separate degas-
2.2 Society of Automotive Engineers Standard:
sing or refining and may be followed by secondary melting,
5
J 533 Flares for Tubing
such as electroslag remelting or vacuum-arc remelting. If
secondary melting is employed, the heat shall be defined as all
3. Ordering Information
of the ingots remelted from a single primary heat.
3.1 Orders for material under this specification should
4.4 Steel may be cast in ingots or may be strand cast. When
include the following, as required to describe the desired
steel of different grades is sequentially strand cast, identifica-
material adequately:
tion of the resultant transition material is required. The
3.1.1 Quantity (feet, meters),
producer shall remove the transition material by an established
3.1.2 Name of material (copper-brazed steel tubing),
procedure that positively separates the grades.
3.1.3 Type, where necessary (see Fig. 1) (normally the type
4.5 The tubing shall be made by rolling steel strip into the
is not specified),
form of tubing and subsequently copper brazing in a reducing
3.1.4 Size (outside diameter and wall thickness; normally
atmosphere.
inside diameter should not be specified),
4.6 Tubing shall be constructed as shown in Fig. 1.
3.1.5 Length (specific or random),
4.7 Tubing shall be suitably tested after brazing by the
3.1.6 Inside surface cleanliness where required (see Section
manufacturer to ensure freedom from leaks and detrimental
8),
flaws.
5. Chemical Composition
1
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
Stainless Steel, and Related Alloys, and is the direct responsibility of Subcommittee
5.1 The steel shall conform to the requirements as to
A01.09 on Carbon Steel Tubular Products.
chemical composition prescribed in Table 1.
Current edition approved Oct. 10, 1996 and March 10, 1997. Published
5.2 Heat Analysis—An analysis of each heat of steel shall
November 1997. Originally published as A 254 – 44. Last previous edition
be made by the steel manufacturer to determine the percentages
A 254 – 94.
2
Annual Book of ASTM Standards, Vol 01.03.
of the elements specified. If secondary melting processes are
3
Discontinued 1995; see 1994 Annual Book of ASTM Standards, Vol 03.05.
employed, the heat analysis shall be obtained from one
4
Discontinued 1996; see 1995 Annual Book of ASTM Standards, Vol 03.05.
5
remelted ingot or the product of one remelted ingot of each
Available from Society of Automotive Engineers, Inc. 400 Commonwealth
Drive, Warrendale, PA 15096. primary melt. The chemical composition thus determined, or
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A 254
TABLE 1 Chemical Requirements
test, tubing shall be cut off square, edge crowned, and
Element Composition, % deburred. It shall be held firmly and squarely in the die, and
punch must be guided on the axis of the tubing.)
Carbon 0.05 to 0
...