ASTM A858/A858M-00(2005)
(Specification)Standard Specification for Heat-Treated Carbon Steel Fittings for Low-Temperature and Corrosive Service
Standard Specification for Heat-Treated Carbon Steel Fittings for Low-Temperature and Corrosive Service
SCOPE
1.1 This specification covers heat-treated wrought carbon steel piping fittings with lowered carbon content of seamless and electric fusion-welded construction covered by the latest revisions in ANSI B16.9, ANSI B16.11, ANSI B16.28, MSS-SP-75, and MSS-SP-79. Fittings differing from these ANSI and MSS standards shall be furnished in accordance with Supplementary Requirement S58 of Specification A960. These fittings are for use in pressure components where inherent notch toughness and optimum sulfide-cracking resistance are required, such as oil and gas industry piping 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. Combining values from the two systems may result in nonconformance with this specification. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Unless the other specifies the applicable "M" specification designation (SI units), the material shall be furnished to inch-pound units.
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NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.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 858/A 858M – 00 (Reapproved 2005)
Standard Specification for
Heat-Treated Carbon Steel Fittings for Low-Temperature and
Corrosive Service
ThisstandardisissuedunderthefixeddesignationA858/A858M;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 A960/A960M Specification for Common Requirements
for Wrought Steel Piping Fittings
1.1 This specification covers heat-treated wrought carbon
2.3 ASME Standards:
steel piping fittings with lowered carbon content of seamless
B16.9 Steel Butt-Welding Fittings
and electric fusion-welded construction covered by the latest
B16.11 ForgedSteelFittings,SocketWeldingandThreaded
revisions in ASME B16.9, ASME B16.11, ASME B16.28,
B16.28 Wrought Steel Buttwelding Short Radius Elbows
MSS-SP-75, and MSS-SP-79. Fittings differing from these
and Returns
ASME and MSS standards shall be furnished in accordance
2.4 MSS Standards:
with Supplementary Requirement S58 of Specification A960/
MSS SP-25 The Standard Marking System of Valves,
A960M. These fittings are for use in pressure components
Fittings, Flanges and Unions
where inherent notch toughness and optimum sulfide-cracking
MSS SP-75 Specification for High Test Wrought Butt-
resistance are required, such as oil and gas industry piping and
Welding Fittings
distribution systems.
MSS SP-79 Socket Welding Reducer Inserts
1.2 Optional supplementary requirements are provided for
2.5 ASME Boiler and Pressure Vessel Code:
fittingswhenagreaterdegreeofexaminationisdesired.Oneor
Section V Nondestructive Examination
more of the supplementary requirements may be specified in
Section VIII Division 1, Pressure Vessels
the order.
2.6 American Society of Nondestructive Testing:
1.3 Thisspecificationdoesnotcovercast-weldingfittingsor
SNT-TC-1A Recommended Practice for Nondestructive
fittings machined from castings.
Testing Personnel Qualification and Certification
1.4 The values stated in either inch-pound units or SI units
are to be regarded separately as standard. Within the text, the
3. Ordering Information
SIunitsareshowninbrackets.Combiningvaluesfromthetwo
3.1 In addition to the requirements of Specification A960/
systems may result in nonconformance with this specification.
A960M, the following ordering information applies: require-
The values stated in each system are not exact equivalents;
ments for certification of the test report.
therefore,eachsystemmustbeusedindependentlyoftheother.
Unless the other specifies the applicable “M” specification
4. General Requirements
designation (SI units), the material shall be furnished to
4.1 Products furnished to this specification shall conform to
inch-pound units.
the requirements of Specification A960/A960M, including
any supplementary requirements that are indicated in the
2. Referenced Documents
purchase order. Failure to comply with the general require-
2.1 In addition to those reference documents listed in
ments of Specification A960/A960M constitutes nonconfor-
Specification A960/A960M, the following list of standards
mance with this specification. In case of conflict between the
apply to this specification.
2 requirements of this specification and SpecificationA960, this
2.2 ASTM Standards:
specification shall prevail.
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 ASME International, Three Park Avenue, New York, NY
Materials for Piping and Special Purpose Applications. 10016–5990.
Current edition approved Sept. 10, 2000. Published November 2000. Originally AvailablefromManufacturersStandardizationSocietyoftheValveandFittings
approved in 1986. Last previous edition approved in 1996 as A858/A858M–96. Industry, 1815 N. Fort Myer Drive, Arlington, VA 22209.
2 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from Society of Automotive Engineers (SAE), 400 Commonwealth
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Dr., Warrendale, PA 15096-0001.
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 858/A 858M – 00 (2005)
5. Materials written procedure and shall be performed after final heat
treatment. Only the side wall area of the tees need be
5.1 The material for fittings shall be fully killed fine-grain
examined. This area is defined by a circle that covers the area
material made by a melting process that is intended to produce
fromtheweldbevelofthebranchoutlettothecenterlineofthe
rounded, well dispersed, fine sulfide inclusions, that promote
body or run. Internal and external surfaces shall be examined
good notch toughness, assists in the resistance to hydrogen
when size permits accessibility. No cracks shall be permitted.
induced cracking, and for weldability suitable for field-
OtherimperfectionsshallbetreatedinaccordancewithSection
welding.
14 on finish. After the removal of any crack, the tees shall be
5.2 Starting materials shall consist of plate, sheet, forgings,
re-examined by the original method. Acceptable tees shall be
forging quality bar and seamless or fusion welded tubular
marked with the symbol PT or MT, as applicable, to indicate
products with filler metal added. The chemical composition
compliance. NDE personnel shall be qualified in accordance
shall conform to Table 1.
with SNT-TC-1A.
5.3 Astartingmaterialthatspecificallyrequirestheaddition
6.5 All caps machined from bar stock shall be examined by
of any element beyond those listed inTable 1 is not permitted.
liquid penetrant or magnetic particle in accordance with
This does not preclude the use of deoxidizers.
Supplementary Requirement S69 or S70 with personnel quali-
5.4 Starting materials shall not require a preheat for field
fications, acceptance criteria and marking as in 5.4.
welding provided that the restrictions of ASME Boiler and
Pressure Vessel Code, Section VIII, Paragraph UW-30 are
7. Heat Treatment
complied with.
7.1 All fittings shall be furnished in the heat-treated condi-
6. Manufacture
tion. Fittings formed above the transformation temperature or
uponwhichweldingisperformed,shallbecooledtobelowthe
6.1 Forging or shaping operations may be performed by
lowercriteriatemperaturepriortoheattreatment.Fittingsshall
hammering, pressing, piercing, extruding, upsetting, rolling,
subsequently be heat treated by normalizing, quenching, and
bending, fusion welding, machining, or by a combination of
tempering or stress-relieving in accordance with Specification
these operations.
A960/A960M.
6.2 All welds including welds in tubular products from
which the fittings are made shall be:
8. Chemical Composition Requirements
6.2.1 Made by welders, welding operators, and welding
procedures qualified under the provisions of ASME Boiler and
8.1 The chemical composition of the steel shall conform to
Pressure Vessel Code, Section IX,
the requirements prescribed in Table 1.
6.2.2 Heat treated in accordance with Section 7 of this
8.2 The steel shall not contain any unspecified elements for
specification, and
the ordered grade to the extent that it conforms to the
6.2.3 Radiographically examined throughout the entire
requirements of another grade for which that element is a
length of each weld in accordance with Articles 1 and 2 of
specified element having a required minimum content.
ASME Boiler and Pressure Vessel Code, Section V with the
8.3 An analysis of each heat of steel shall be made from a
acceptance limits in accordance with Paragraph UW-51 in
sample taken preferably during the pouring of the heat. The
Section VIII of that same code.
results shall conform to Table 1.
6.3 The welded joints of the fittings shall be furnished in
8.4 The fittings manufacturer shall make a product analysis
accordance with the requirements of Paragraph UW-35(a) of
per heat from either the starting material or from a fitting in
ASME Boiler and Pressure Vessel Code, Section VIII.
accordance with Specification A960/A960M.
6.4 All butt-weld tees manufactured by cold-forming meth-
8.5 Weld metal used in the construction of the fittings shall
ods shall be liquid-penetrant or magnetic-particle examined by
conformtothetensileandimpactrequirementsof9.4and11.1
one of the methods specified in Specification A960/A960M.
after heat treatment in accordance with Section 7. A chemical
This examination shall be performed in accordance with a
analysis shall be performed on deposited weld metal for each
heat of filler metal or, for submerged arc welding, each heat of
fillermetalandbatchofflux.Theweldmetalshallbedeposited
TABLE 1 Chemical Requirements
in accordance with the qualified weld procedure.
Composition %
8.6 Only the carbon content of the deposited weld-metal
Heat Analysis
composition need comply with the requirements of Table 1.
Carbon 0.20
The total nickel content of the deposited weld metal shall not
Manganese 0.90–1.35 All values are
exceed 1.0%.
Phosphorus 0.030 maximum un
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