ASTM A778-00
(Specification)Standard Specification for Welded, Unannealed Austenitic Stainless Steel Tubular Products
Standard Specification for Welded, Unannealed Austenitic Stainless Steel Tubular Products
SCOPE
1.1 This specification covers straight seam and spiral butt seam welded unannealed austenitic stainless steel tubular products intended for low and moderate temperatures and corrosive service where heat treatment is not necessary for corrosion resistance. lists the five grades covered by this specification. The user of this specification should be aware that a minimum amount of testing and examination is required of the basic product. The user requiring additional testing or examination is referred to the supplemental requirements or Ordering Information, or both. Users requiring a tubular product with post-weld heat treatment or with radiographic examination are referred to Specification A312/A312M, A358/A358M, or A409/A409M, as applicable.
1.2 This specification covers welded unannealed tubular products 3 in. (75 mm) through 48 in. (1200 mm) in outside diameter and in nominal wall thicknesses of 0.062 in. (1.5 mm) through 0.500 in. (12.5 mm) produced to this specification. Tubular products having other diameters or wall thickness, or both, may be furnished provided it complies with all other requirements of this specification.
1.3 The values stated in inch-pound units are to be regarded as the standard.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 778 – 00 An American National Standard
Standard Specification for
Welded, Unannealed Austenitic Stainless Steel Tubular
Products
This standard is issued under the fixed designation A 778; 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.
1. Scope Temperature Service
A 370 Test Methods and Definitions for Mechanical Testing
1.1 This specification covers straight seam and spiral butt
of Steel Products
seam welded unannealed austenitic stainless steel tubular
A 409/A 409M Specification for Welded Large Diameter
products intended for low and moderate temperatures and
Austenitic Steel Pipe for Corrosive or High-Temperature
corrosive service where heat treatment is not necessary for
Service
corrosion resistance. Table 1 lists the five grades covered by
A 700 Practices for Packaging, Marking, and Loading
this specification. The user of this specification should be
Methods for Steel Products for Domestic Shipment
aware that a minimum amount of testing and examination is
A 941 Terminology Relating to Steel, Related Alloys, and
required of the basic product. The user requiring additional
Ferroalloys
testing or examination is referred to the supplemental require-
A 999/A 999M Specification for General Requirements for
ments or Ordering Information, or both. Users requiring a
Alloy and Stainless Steel Pipe
tubular product with post-weld heat treatment or with radio-
E 340 Test Method for Macroetching Metals and Alloys
graphic examination are referred to Specification A 312/
E 527 Practice for Numbering Metals and Alloys (UNS)
A 312M, A 358/A 358M, or A 409/A 409M, as applicable.
2.2 AWS Standards:
1.2 This specification covers welded unannealed tubular
A 5.4 Corrosion—Resisting Chromium and Chromium-
products 3 in. (75 mm) through 48 in. (1200 mm) in outside
Nickel Steel Covered Welding Electrodes
diameter and in nominal wall thicknesses of 0.062 in. (1.5 mm)
A 5.9 Corrosion–Resisting Chromium and Chromium-
through 0.500 in. (12.5 mm) produced to this specification.
Nickel Steel Welding Rods and Bare Electrodes
Tubular products having other diameters or wall thickness, or
2.3 SAE Standard:
both, may be furnished provided it complies with all other
SAE J1086 Practice for Numbering Metals and Alloys
requirements of this specification.
(UNS)
1.3 The values stated in inch-pound units are to be regarded
as the standard.
3. Terminology
2. Referenced Documents 3.1 Definitions:
3.2 The definitions in Specification A 999/A 999M and
2.1 ASTM Standards:
Terminology A 941 are applicable to this specification.
A 240 Specification for Heat-Resisting Chromium and
Chromium-Nickel Stainless Steel Plate, Sheet, and Strip
4. Ordering Information
for Pressure Vessels
4.1 Orders for material to this specification should include
A 262 Practices for Detecting Susceptibility to Intergranu-
2 the following:
lar Attack in Austenitic Stainless Steels
4.1.1 Quantity (feet, metres, or number of pieces),
A 312/A 312M Specification for Seamless and Welded
3 4.1.2 Name of material (welded unannealed austenitic stain-
Austenitic Stainless Steel Pipes
less steel tubular products),
A 358/A 358M Specification for Electric-Fusion-Welded
4.1.3 Straight seam or spiral butt seam,
Austenitic Chromium-Nickel Alloy Steel Pipe for High-
4.1.4 Grade (see Table 1),
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee Annual Book of ASTM Standards, Vol 01.05.
A01.10 on Stainless and Alloy Steel Tubular Products. Annual Book of ASTM Standards, Vol 03.01.
Current edition approved May 10, 2000. Published July 2000. Originally Available from American Welding Society, 2501 N.W. 7th St., Miami, FL
published as A 778 – 80. Last previous edition A 778 – 98. 33125.
2 7
Annual Book of ASTM Standards, Vol 01.03. Available from Society of Automotive Engineers, 400 Commonwealth Drive,
Annual Book of ASTM Standards, Vol 01.01. Warrendale, PA 15096.
Copyright © ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19428-2959, United States.
A 778
TABLE 1 Chemical Requirements
Composition, %
Manga- Phos- Columbium
UNS Carbon Nitrogen,
Grade nese, phorus, Titanium Plus
A B
Sulfur, Silicon,
Designation max max
Chromium Nickel
max max Tantalus
max max
TP 304L S30403 0.030 2.00 0.045 0.030 1.00 18.0–20.0 8.0–13.0 . . . 0.10
TP 316L S31603 0.030 2.00 0.045 0.030 1.00 16.0–18.0 10.0–14.0 2.00 . . 0.10
3.00
TP 317L S31703 0.030 2.00 0.045 0.030 1.00 18.0–20.0 11.0–15.0 3.0 . . 0.10
4.0
C
TP 321 S32100 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 . . .
D
TP 347 S34700 0.08 2.00 0.045 0.030 1.00 17.0–19.0 9.0–12.0 . . .
A
New designation established in accordance with Practice E 527 and SAE J1086, Practice for Numbering Metals and Alloys (UNS).
B
The carbon analysis shall be reported to the nearest 0.01 %, except for the low carbon (0.030) types, which shall be reported to the nearest 0.001 %.
C
The titanium content shall be not less than five times the carbon content and not more than 0.70 %.
D
The columbium plus tantalum content shall be not less than ten times the carbon content and not more than 1.10 %.
4.1.5 Size (outside diameter and specified wall thickness) ances of 10.4. The weld bead may be removed at the option of
(see 10.3 and 10.4), the manufacturer or upon agreement between the manufacturer
4.1.6 Length (mill standard lengths, or specify cut lengths) and purchaser.
(see 10.1), 6.5.3 Injurious weld defects shall be repaired by removal to
4.1.7 Optional requirements (Supplementary Requirements sound metal and rewelding.
S1 to S5), 6.5.4 The alloy content (chromium, nickel, molybdenum,
4.1.8 Certification requirements, columbium, and carbon) of the filler metal shall conform to
4.1.9 Specification designation, and that required for the plate or the welding electrodes as shown
4.1.10 Special requirements. in Table II of Specification AWS A5.4 or in Table I of
Specification AWS A5.9, except that when welding on Type
5. Significance and Use
321 base metal, the deposited weld metal may correspond to
5.1 It is anticipated that the ASTM Subcommittees A01.06,
Type 347.
A01.10, A01.17, A01.22, and A01.28 will use the standard
7. Heat Treatment
composition limits listed in this specification for the grades
7.1 Heat treatment shall not be required.
identified by the corresponding UNS designation in the product
specification unless there is a specific technical justification for
8. Chemical Requirements
doing otherwise. The compositions in this specification shall
8.1 Mill certificates of heat analysis of each heat of steel
not be considered as chemical requirements for any particular
shall be furnished upon request.
product until adopted by the subcommittee overseeing that
product. 9. Mechanical Requirements
9.1 Each lot shall be subjected to one transverse tension test
6. Manufacture
and two transverse guided bend tests.
6.1 The tubular products shall be made from flat-rolled steel
NOTE 1—The term lot applies to all pipe of the same grade, of the same
sheet, coil, or plate by a shielded arc-welding process. The
thickness, produced from the same heat and welded with the same weld
material used for manufacture shall conform to the require-
procedure.
ments of one of the grades of Specification A 240 listed in
9.2 The maximum lot size shall be in accordance with the
Table 1. At the manufacturer’s option, filler metal may be used.
following table:
6.2 Tubular products 14 in. (350 mm) in diameter and
Diameter Range Lot Size (lengths)
smaller shall have a single longitudinal weld or a spiral butt
up to 3 in. exclusive 400
weld seam. Tubular products of larger diameter may have a
3–8 in. exclusive 300
maximum of three longitudinal welds. All weld tests, exami-
8–14 in. exclusive 200
14 in. and over 100
nations, inspections, or treatments are to be performed on each
weld seam.
9.3 The yield strength corresponding to a permanent offset
6.3 Circumferentially welded joints of the same quality as
of 0.2 % of the gage length of the specimen or to a total
the longitudinal or spiral joints shall be permitted by agreement
extension of 0.5 % of the gage length under load shall be
between the manufacturer and the purchaser.
determined.
6.4 All tubular products shall be furnished clean and free of
10. Permissible Variations in Tubular Products
scale.
Dimensions
6.5 Welding:
6.5.1 The welds shall be made by the manual or automatic 10.1 Lengths—Tubular products are normally furnished in
electric-welding process. mill lengths 10 ft (3 m) and over. If specific lengths are
6.5.2 The welded joints may show a reinforcing bead no ordered, no length shall be under the length specified and not
1 1
greater than ⁄16 in. (1.6 mm) on either surface of the tubular more than ⁄4 in. (6 mm) over that specified.
product. At no place shall the thickness of the weld section be 10.2 Straightn
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