ASTM A860/A860M-00(2005)
(Specification)Standard Specification for Wrought High-Strength Low-Alloy Steel Butt-Welding Fittings
Standard Specification for Wrought High-Strength Low-Alloy Steel Butt-Welding Fittings
ABSTRACT
This specification covers wrought high-strength low-alloy butt-welding steel fittings of seamless and electric fusion-welded construction for applications in high-pressure gas and oil transmission and distribution systems. Starting materials shall consist of plate, sheet, forgings, forging quality bar, and seamless or fusion-welded tubular products with filler metal added. Materials shall be heat treated by normalizing, quenching, and tempering or stress relieving. Specimens shall conform to required values of chemical composition and mechanical properties, namely: yield strength, tensile strength, elongation, notch toughness, and hardness. This specification does not require hydrostatic testing.
SCOPE
1.1 This specification covers wrought high-strength low-alloy steel butt-welding fittings of seamless and electric fusion-welded construction covered by the latest revisions of ANSI B16.9, ANSI 16.28, and MSS-SP-75. Butt-welding fittings differing from these ASME and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A960. These fittings are for use in high-pressure gas and oil transmission and distribution systems.
1.2 Optional supplementary requirements are provided for fittings when a greater degree of examination is desired. One or more of the supplementary requirements may be specified in the order.
1.3 This specification does not cover cast-welding fittings or fittings machined from castings.
1.4 The values stated in either inch-pound units or SI units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification. Unless the order specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.
General Information
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Standards Content (Sample)
NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 860/A 860M – 00 (Reapproved 2005)
Standard Specification for
Wrought High-Strength Low-Alloy Steel Butt-Welding
Fittings
ThisstandardisissuedunderthefixeddesignationA860/A860M;thenumberimmediatelyfollowingthedesignationindicatestheyear
of original adoption or, in the case of revision, the year of last revision.Anumber in parentheses indicates the year of last reapproval.
A superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope Chemical Analysis of Steel Products
A960/A960M Specification for Common Requirements
1.1 This specification covers wrought high-strength low-
for Wrought Steel Piping Fittings
alloysteelbutt-weldingfittingsofseamlessandelectricfusion-
2.2 ASME Standards:
welded construction covered by the latest revisions of ASME
B16.9 Steel Butt-Welding Fittings
B16.9, ASME 16.28, and MSS-SP-75. Butt-welding fittings
B16.28 Wrought Steel Buttwelding Short Radius Elbows
differing from these ASME and MSS standards shall be
and Returns
furnished in accordance with Supplementary Requirement S58
2.3 AWS Standard:
of Specification A960/A960M. These fittings are for use in
AWS5.18 Specification for Carbon Steel Metals for Gas
high-pressure gas and oil transmission and distribution sys-
Shielded Arc Welding
tems.
2.4 ASME Boiler and Pressure Vessel Code:
1.2 Optional supplementary requirements are provided for
Section V, Nondestructive Examination
fittingswhenagreaterdegreeofexaminationisdesired.Oneor
Section VIII, Division 1, Pressure Vessels
more of the supplementary requirements may be specified in
Section IX , Welding and Brazing Qualifications
the order.
2.5 MSS Standards:
1.3 Thisspecificationdoesnotcovercast-weldingfittingsor
MSS SP-25 The Standard Marking System of Valves,
fittings machined from castings.
Fittings, Flanges and Unions
1.4 The values stated in either inch-pound units or SI units
MSS-SP-75 Specification for High Test Wrought Butt-
are to be regarded separately as standard. Within the text, the
Welding Fittings
SI units are shown in brackets. The values stated in each
2.6 American Society of Nondestructive Testing:
system are not exact equivalents; therefore, each system must
SNT-TC-1A Recommended Practice for Nondestructive
beusedindependentlyoftheother.Combiningvaluesfromthe
Testing Personnel Qualification and Certification
two systems may result in nonconformance with this specifi-
cation. Unless the order specifies the applicable “M” specifi-
3. Ordering Information
cation designation (SI units), the material shall be furnished to
3.1 In addition to the requirements of Specification A960/
inch-pound units.
A960M, the following ordering information applies:
2. Referenced Documents 3.1.1 Grade Symbol,
2 3.1.2 Requirements for certification of test report.
2.1 ASTM Standards:
A370 TestMethodsandDefinitionsforMechanicalTesting
4. General Requirements
of Steel Products
4.1 Product furnished to this specification shall conform to
A 751 Test Methods, Practices, and Terminology for
the requirements of Specification A960/A960M, including
any supplementary requirements that are indicated in the
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
A01.22onSteelForgingsandWroughtFittingsforPipingApplicationsandBolting Available from American Society of Mechanical Engineers (ASME), ASME
Materials for Piping and Special Purpose Applications. International Headquarters, Three Park Ave., New York, NY 10016-5990.
Current edition approved Dec. 10, 2000. Published February 2001. Originally Available from TheAmerican Welding Society (AWS), 550 NW LeJeune Rd.,
approved in 1986. Last previous edition approved in 1996 as A860/A860M–96. Miami, FL 33126.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Industry (MSS), 127 Park St., NE, Vienna, VA 22180-4602.
Standards volume information, refer to the standard’s Document Summary page on AvailablefromTheAmericanSocietyforNondestructiveTesting(ASNT),P.O.
the ASTM website. Box 28518, 1711 Arlingate Ln., Columbus, OH 43228-0518.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 860/A 860M – 00 (2005)
purchase order. Failure to comply with the general require- ASME Boiler and Pressure Vessel Code, Section V with
ments of Specification A960/A960M constitutes nonconfor- acceptance limits in accordance with Paragraph UW-51 of
mance with this specification. In case of conflict between the ASME Boiler and Pressure Vessel Code, Section VIII.
requirements of this specification and Specification A960/
5.7 The welded joints of the fittings shall be furnished in
A960M, this specification shall prevail.
accordance with the requirements of Paragraph UW-35(a) of
ASME Boiler and Pressure Vessel Code, Section VIII.
5. Materials and Manufacture
5.8 All butt-weld tees manufactured by cold-forming meth-
5.1 The material for fittings shall be fully killed fine-grain
ods shall be liquid penetrant or magnetic particle examined by
material made by a melting process that is intended to produce
one of the methods specified in Supplementary Requirements
rounded, well dispersed, fine sulphide inclusions, that promote
S69 or S70 of Specification A960/A960M. This examination
good notch toughness, assists in the resistance to hydrogen
shall be performed in accordance with a written procedure and
induced cracking, and for weldability suitable for field weld-
shallbeperformedafterfinalheattreatment.Onlythesidewall
ing.
area of the tees need be examined. This area is defined by a
5.2 Starting materials shall consist of plate, sheet, forgings,
circle that covers the area from the weld bevel of the branch
forging quality bar, and seamless or fusion-welded tubular
outlettothecenterlineofthebodyorrun.Internalandexternal
products with filler metal added. The chemical composition
surfaces shall be examined when size permits accessibility. No
shall conform to Table 1.
cracks shall be permitted. Other imperfections shall be treated
5.3 Astartingmaterialthatspecificallyrequirestheaddition
in accordance with 12.1 on finish. After the removal of any
of any element beyond those listed in Table 1 is not permitted.
cracks, the tees shall be re-examined by the original method.
This does not preclude the use of deoxidizers.
Acceptable tees shall be marked with the symbol PTor MT, as
5.4 Starting material shall not require a preheat for field
applicable, to indicate compliance. NDE personnel shall be
welding provided that the restrictions of ASME Boiler and
qualified in accordance with SNT-TC-1A.
Pressure Vessel Code, Section VIII, Paragraph UW-30 are
5.9 All caps machined from bar stock shall be examined by
complied with.
liquid penetrant or magnetic particle in accordance with
5.5 Forging or shaping operations may be performed by
Supplementary Requirements S69 or S70 of Specification
hammering, pressing, piercing, extruding, upsetting, rolling,
A960/A960M, and with personnel qualifications, acceptance
bending, fusion, welding, machining, or by a combination of
criteria, and marking as in 5.8.
these operations.
5.6 All welds including welds in tubular products from
6. Heat Treatment
which the fittings are made shall be:
5.6.1 Made by welders, welding operators, and welding
6.1 All fittings shall be furnished in the heat-treated condi-
procedures qualified under the provisions ofASME Boiler and tion. Fittings formed above the transformation temperature or
Pressure Vessel Code, Section IX,
uponwhichweldingisperformed,shallbecooledtobelowthe
5.6.2 Heat treated in accordance with Section 6 of this lowercriticaltemperaturepriortoheattreatment.Fittingsshall
specification, and
subsequently be heat treated by normalizing, quenching, and
5.6.3 Radiographically examined throughout the entire
tempering or stress relieving in accordance with Specification
length of each weld in accordance with Articles 1 and 2 of
A960/A960M.
TABLE 1 Chemical Requirements
7. Chemical Composition
Composition %
7.1 The chemical composition of the steel shall conform to
Heat
the requirements prescribed in Table 1.
Analysis
A
7.2 The steel shall not contain any unspecified elements for
Carbon 0.20
Manganese 1.00–1.45 All values are
the ordered grade to the extent that it conforms to the
Phosphorus 0.030 maximum unless
requirements of another grade for which that element is a
Sulfur 0.010 a range is stated
B
specified element having a required minimum content.
Silicon 0.15–0.40
C
Nickel 0.50
7.3 Analysis of each heat of steel shall be made from a
C
Chromium 0.30
C
sample taken preferably during the pouring of the heat. The
Molybdenum 0.25
C
Copper 0.35 results shall conform toTable 1 for either heat or Specification
Titanium 0.05
A960/A960M for product analysis limits as applicable.
Vanadium 0.10
Columbium 0.04 7.4 The fittings manufacturer shall make a product analysis
Vanadium plus 0.12
per heat from either the starting material or from a fitting. The
Columbium
chemical composition thus determined shall conform to Table
Aluminum 0.06
1. The product analysis shall be the basis for rejection. For
A
The carbon equivalent, as calculated by the following formula, shall not exceed
referee purposes, Test Methods, Practices, and Terminology
0.42 %:
Mn Cr 1 Mo 1 V Ni 1 Cu A751 shall apply.
CE 5 C 1 1 1
6 5 15
7.5 The carbon equivalent of the base metal, as determined
B
If vacuum carbon deoxidation is used, silicon shall not exceed 0.10 % by heat
by the following formula, shall not exceed 0.42% for the
analysis and 0.12 % by product analysis.
C
The sum of Ni + Cr + Mo + Cu shall not exceed 1.0 %. product analysis:
A 860/A 860M – 00 (2005)
8.3 The test temperature shall be −50°F [−46°C].
Mn Cr 1Mo 1V Ni 1Cu
CE 5C 1 1 1
6 5 15
9. Tensile Requirements
7.6 Weld metal used in the construction of the fittings shall
9.1 The tensile properties of the fitting material shall con-
conform to the tensile and impact requirements of 9.4 and 8.1
form to the requirements listed in Table 2.
after heat treatment in accordance with Section 6. A chemical
9.2 Tensiontestspecimensshallbetakenfromafittingafter
analysis shall be performed on deposited weld metal for each
final heat treatment or from a test piece of the same heat and
heat of filler metal or, for submerged arc welding, each heat of
nominal thickness that was heat treated in a furnace charge
fillermetalandbatchofflux.Theweldmetalshallbedeposited
with the fittings the
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