ASTM A858/A858M-00

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Designation: A 858/A 858M – 00
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 A530/A530M Specification for General Requirements for
Specialized Carbon and Alloy Steel Pipe
1.1 This specification covers heat-treated wrought carbon
A 960 Specification for Common Requirements for
steel piping fittings with lowered carbon content of seamless
Wrought Steel Pipe Fittings
and electric fusion-welded construction covered by the latest
2.3 ASME Boiler and Pressure Vessel Code:
revisions in ANSI B16.9, ANSI B16.11, ANSI B16.28,
Section V Nondestructive Examination
MSS-SP-75, and MSS-SP-79. Fittings differing from these
Section VIII Division 1, Pressure Vessels
ASME and MSS standards shall be furnished in accordance
with Supplementary Requirement S58 of Specification A960.
3. Ordering Information
These fittings are for use in pressure components where
3.1 In addition to the requirements of Specification A960,
inherent notch toughness and optimum sulfide-cracking resis-
the following ordering information applies: requirements for
tance are required, such as oil and gas industry piping and
certification of the test report.
distribution systems.
1.2 Optional supplementary requirements are provided for
4. General Requirements
fittingswhenagreaterdegreeofexaminationisdesired.Oneor
4.1 Products furnished to this specification shall conform to
more of the supplementary requirements may be specified in
the requirements of SpecificationA960, including any supple-
the order.
mentary requirements that are indicated in the purchase order.
1.3 Thisspecificationdoesnotcovercast-weldingfittingsor
Failure to comply with the general requirements of Specifica-
fittings machined from castings.
tionA960 constitutes nonconformance with this specification.
1.4 The values stated in either inch-pound units or SI units
In case of conflict between the requirements of this specifica-
are to be regarded separately as standard. Within the text, the
tion and Specification A960, this specification shall prevail.
SIunitsareshowninbrackets.Combiningvaluesfromthetwo
systems may result in nonconformance with this specification.
5. Materials
The values stated in each system are not exact equivalents;
5.1 The material for fittings shall be fully killed fine-grain
therefore,eachsystemmustbeusedindependentlyoftheother.
material made by a melting process that is intended to produce
Unless the other specifies the applicable “M” specification
rounded, well dispersed, fine sulfide inclusions, that promote
designation (SI units), the material shall be furnished to
good notch toughness, assists in the resistance to hydrogen
inch-pound units.
induced cracking, and for weldability suitable for field-
welding.
2. Referenced Documents
5.2 Starting materials shall consist of plate, sheet, forgings,
2.1 In addition to those reference documents listed in
forging quality bar and seamless or fusion welded tubular
Specification A960, the following list of standards apply to
products with filler metal added. The chemical composition
this specification.
shall conform to Table 1.
2.2 ASTM Standards:
5.3 Astartingmaterialthatspecificallyrequirestheaddition
of any element beyond those listed in Table 1 is not permitted.
This does not preclude the use of deoxidizers.
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
A01.22onSteelForgingsandWroughtFittingsforPipingApplicationsandBolting
Materials for Piping and Special Purpose Applications. Annual Book of ASTM Standards, Vol 01.01.
Current edition approved Sept. 10, 2000. Published November 2000. Originally Available from American Society of Mechanical Engineers, Three Park
published as A858/A858M–86. Last previous edition A858/A858M–96. Avenue, New York, NY 10016-5990.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 858/A 858M – 00
TABLE 1 Chemical Requirements
Supplementary Requirement S69 or S70 with personnel quali-
Composition % fications, acceptance criteria and marking as in 5.4.
Heat Analysis
7. Heat Treatment
Carbon 0.20
Manganese 0.90–1.35 All values are
7.1 All fittings shall be furnished in the heat-treated condi-
Phosphorus 0.030 maximum unless a
tion. Fittings formed above the transformation temperature or
Sulfur 0.010 range is shown
A
Silicon 0.15–0.40
uponwhichweldingisperformed,shallbecooledtobelowthe
B
Nickel 0.50
lowercriteriatemperaturepriortoheattreatment.Fittingsshall
B
Chromium 0.30
B
subsequently be heat treated by normalizing, quenching, and
Molybdenum 0.20
B
Copper 0.35
tempering or stress-relieving in accordance with Specification
A
When vacuum carbon deoxidation is used, the silicon shall be 0.10 % A960.
maximum, and on product analysis shall not exceed 0.12 %.
B
The combined total of nickel, chromium, molybdenum, and copper shall not
8. Chemical Composition Requirements
exceed 1.0 %.
8.1 The chemical composition of the steel shall conform to
the requirements prescribed in Table 1.
5.4 Starting materials shall not require a preheat for field
8.2 The steel shall not contain any unspecified elements for
welding provided that the restrictions of ASME Boiler and
the ordered grade to the extent that it conforms to the
Pressure Vessel Code, Section VIII, Paragraph UW-30 are
requirements of another grade for which that element is a
complied with.
specified element having a required minimum content.
8.3 An analysis of each heat of steel shall be made from a
6. Manufacture
sample taken preferably during the pouring of the heat. The
6.1 Forging or shaping operations may be performed by
results shall conform to Table 1.
hammering, pressing, piercing, extruding, upsetting, rolling,
8.4 The fittings manufacturer shall make a product analysis
bending, fusion welding, machining, or by a combination of
per heat from either the starting material or from a fitting in
these operations.
accordance with Specification A960.
6.2 All welds including welds in tubular products from
8.5 Weld metal used in the construction of the fittings shall
which the fittings are made shall be:
conform to the tensile and impact requirements of 9.4 and 11.1
6.2.1 Made by welders, welding operators, and welding
after heat treatment in accordance with Section 7. A chemical
procedures qualified under the provisions of ASME Boiler and
analysis shall be performed on deposited weld metal for each
Pressure Vessel Code, Section IX,
heat of filler metal or, for submerged arc welding, each heat of
6.2.2 Heat treated in accordance with Section 7 of this
fillermetalandbatchofflux.Theweldmetalshallbedeposited
specification, and
in accordance with the qualified weld procedure.
6.2.3 Radiographically examined throughout the entire
8.6 Only the carbon content of the deposited weld-metal
length of each weld in accordance with Articles 1 and 2 of
composition need comply with the requirements of Table 1.
ASME Boiler and Pressure Vessel Code, Section V with the
The total nickel content of the deposited weld metal shall not
acceptance limits in accordance with Paragraph UW-51 in
exceed 1.0%.
Section VIII of that same code.
6.3 The welded joints of the fittings shall be furnished in
9. Tensile Requirements
accordance with the requirements of Paragraph UW-35(a) of
9.1 The tensile properties of the fitting material shall con-
ASME Boiler and Pressure Vessel Code, Section VIII.
form to the requirements listed in Table 2.
6.4 All butt-weld tees manufactured by cold-forming meth-
9.2 Tensiontestspecimensshallbetakenfromafittingafter
ods shall be liquid-penetrant or magnetic-particle examined by
final heat treatment or from a test piece of the same heat and
one of the methods specified in Specification A960. This
nominal thickness that was heat-treated in a charge with the
examination shall be performed in accordance with a written
fittings it represents.
procedure and shall be performed after final heat treatment.
9.3 Onetensiletestisrequiredforeachheatoffittingsofthe
Onlythesidewallareaoftheteesneedbeexamined.Thisarea
same section thickness and heat treated in either a continuous-
is defined by a circle that covers the area from the weld bevel
orbatch-typefurnace,controlledwithinarangeof50°F[28°C]
of the branch outlet to the center line of the body or run.
and equipped with recording pyrometers.
Internal and external surfaces shall be examined when size
permits accessibility. No cracks shall be permitted. Other 9.4 In addition, fittings containing wel
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