ASTM A369/A369M-11(2016)
(Specification)Standard Specification for Carbon and Ferritic Alloy Steel Forged and Bored Pipe for High-Temperature Service
Standard Specification for Carbon and Ferritic Alloy Steel Forged and Bored Pipe for High-Temperature Service
ABSTRACT
This guide specifies standard specification for heavy-wall carbon and alloy steel pipe made from turned and bored forgings and is intended for high-temperature service. Heat and product analysis shall be conducted on several grades of ferritic steels, wherein the material shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, chromium, and molybdenum. The steel pipe shall conform to the required tensile properties like tensile strength, yield strength, and elongation. Required mechanical tests for the steel pipe include transverse or longitudinal tension test, flattening test, and bend test.
SCOPE
1.1 This specification2 covers heavy-wall carbon and alloy steel pipe (Note 1) made from turned and bored forgings and is intended for high-temperature service. Pipe ordered under this specification shall be suitable for bending and other forming operations and for fusion welding. Selection will depend on design, service conditions, mechanical properties and high-temperature characteristics.
Note 1: The use of the word “pipe” throughout the several sections of this specification is used in the broad sense and intended to mean pipe headers, or leads.
Note 2: The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,” “size,” and “nominal size.”
1.2 Several grades of ferritic steels are covered. Their compositions are given in Table 1.
1.3 Supplementary requirements (S1 to S6) of an optional nature are provided. These supplementary requirements call for additional tests to be made, and when desired shall be so stated in the order, together with the number of such tests required.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard. The inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
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Designation:A369/A369M −11 (Reapproved 2016)
Standard Specification for
Carbon and Ferritic Alloy Steel Forged and Bored Pipe for
High-Temperature Service
This standard is issued under the fixed designationA369/A369M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope A999/A999M Specification for General Requirements for
2 Alloy and Stainless Steel Pipe
1.1 This specification covers heavy-wall carbon and alloy
E290 Test Methods for Bend Testing of Material for Ductil-
steel pipe (Note 1) made from turned and bored forgings and is
ity
intended for high-temperature service. Pipe ordered under this
E381 Method of Macroetch Testing Steel Bars, Billets,
specification shall be suitable for bending and other forming
Blooms, and Forgings
operations and for fusion welding. Selection will depend on
2.2 ASME Boiler and Pressure Vessel Code:
design, service conditions, mechanical properties and high-
Section IX
temperature characteristics.
2.3 ANSI Standard:
NOTE 1—The use of the word “pipe” throughout the several sections of
B 46.1 Surface Texture
this specification is used in the broad sense and intended to mean pipe
2.4 AWS Specifications:
headers, or leads.
NOTE 2—The dimensionless designator NPS (nominal pipe size) has
A5.5/A5.5M Specification for Low-Alloy Steel Electrodes
been substituted in this standard for such traditional terms as “nominal
for Shielded Metal Arc Welding
diameter,” “size,” and “nominal size.”
A5.23/A5.23M Specification for Low-Alloy Steel Elec-
1.2 Several grades of ferritic steels are covered. Their
trodes and Fluxes for Submerged Arc Welding
compositions are given in Table 1.
A5.28/A5.28M Specification for Low-Alloy Steel Elec-
trodes for Gas Shielded Arc Welding
1.3 Supplementary requirements (S1 to S6) of an optional
A5.29/A5.29M Low-Alloy Steel Electrodes for Flux Cored
natureareprovided.Thesesupplementaryrequirementscallfor
Arc Welding
additional tests to be made, and when desired shall be so stated
in the order, together with the number of such tests required.
3. Ordering Information
1.4 The values stated in either SI units or inch-pound units
3.1 Orders for material to this specification should include
are to be regarded separately as standard. Within the text, the
the following, as required, to describe the desired material
SI units are shown in brackets. The values stated in each
adequately:
system may not be exact equivalents; therefore, each system
3.1.1 Quantity (feet, centimetres, or number of lengths),
shall be used independently of the other. Combining values
3.1.2 Name of material (forged and bored pipe),
from the two systems may result in non-conformance with the
3.1.3 Grade (Table 1),
standard. The inch-pound units shall apply unless the “M”
3.1.4 Size (inside diameter and minimum wall thickness),
designation of this specification is specified in the order.
3.1.5 Length (Permissible Variations in Length Section of
2. Referenced Documents Specification A999/A999M),
3.1.6 Verification of tensile and hardness properties at
2.1 ASTM Standards:
mid-thickness for Grade FP91 (9.2)
3.1.7 End finish (13),
This specification is under the jurisdiction ofASTM Committee A01 on Steel,
3.1.8 Optional requirements (Sections 8, Supplementary
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
Requirements S1 to S6; 13.2),
A01.10 on Stainless and Alloy Steel Tubular Products.
Current edition approved Sept. 1, 2016. Published September 2016. Originally
approved in 1953. Last previous edition approved in 2011 as A369/A369M – 11.
DOI: 10.1520/A0369_A0369M-11R16. Available from American Society of Mechanical Engineers (ASME), ASME
For ASME Boiler and Pressure Vessel Code applications see related Specifi- International Headquarters, Two Park Ave., New York, NY 10016-5990, http://
cation SA-369 in Section II of that Code. www.asme.org.
3 5
For referenced ASTM standards, visit the ASTM website, www.astm.org, or Available from American National Standards Institute (ANSI), 25 W. 43rd St.,
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM 4th Floor, New York, NY 10036, http://www.ansi.org.
Standards volume information, refer to the standard’s Document Summary page on Available from American Welding Society (AWS), 550 NW LeJeune Rd.,
the ASTM website. Miami, FL 33126, http://www.aws.org.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A369/A369M−11 (2016)
TABLE 1 Chemical Requirements
Grade Composition, %
FPA FPB FP1 FP2
Carbon 0.25 max 0.30 max 0.10–0.20 0.10–0.20
Manganese 0.27–0.93 0.29–1.06 0.30–0.80 0.30–0.61
Phosphorus, max 0.035 0.035 0.025 0.025
Sulfur, max 0.035 0.035 0.025 0.025
Silicon 0.10 min 0.10 min 0.10–0.50 0.10–0.30
Chromium . . . 0.50–0.81
Molybdenum . . 0.44–0.65 0.44–0.65
Grade FP5 FP9 FP11 FP12
Carbon 0.15 max 0.15 max 0.05–0.15 0.05–0.15
Manganese 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.61
Phosphorus, max 0.025 0.030 0.025 0.025
Sulfur, max 0.025 0.030 0.025 0.025
Silicon 0.50 max 0.50–1.00 0.50–1.00 0.50 max
Chromium 4.00–6.00 8.00–10.00 1.00–1.50 0.80–1.25
Molybdenum 0.45–0.65 0.90–1.10 0.44–0.65 0.44–0.65
Grade FP21 FP22 FP91 FP92
Carbon 0.05–0.15 0.05–0.15 0.08–0.12 0.07–0.13
Manganese 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.60
Phosphorus, max 0.025 0.025 0.025 0.020
Sulfur, max 0.025 0.025 0.025 0.010
Silicon 0.50 max 0.50 max 0.20–0.50 0.50 max
Chromium 2.65–3.35 1.90–2.60 8.00–9.50 8.50–9.50
Molybdenum 0.80–1.06 0.87–1.13 0.85–1.05 0.30–0.60
Others: W 1.50–2.00
Ni 0.40 max V 0.15–0.25
V 0.18–0.25 Cb 0.04–0.09
Cb 0.06–0.10 N 0.030–0.070
N 0.03–0.07 Ni 0.40 max
Al 0.02 max Al 0.02 max
Ti 0.01 max Ti 0.01 max
Zr 0.01 max Zr 0.01 max
B 0.001–0.006
3.1.9 Test report required (Certification Section of Specifi- 5.2.3 Unless otherwise specified, the final forging operation
cation A999/A999M), shall be followed by a treatment suitable to the grade as
3.1.10 Specification designation, and specified in 5.4.
3.1.11 Special requirements or exceptions to this specifica-
5.3 Machining:
tion.
5.3.1 All forgings shall have both the inner and outer
surfaces machined.
4. General Requirements
5.3.2 After heat treatment, the pipe shall be machined to a
4.1 Material furnished under this specification shall con-
finish with a roughness value no greater than 250-µin. [6.4-µm]
form to the applicable requirements of the current edition of
arithmetical average deviation (AA), terms as defined inANSI
Specification A999/A999M, unless otherwise provided herein.
B 46.1-1962, unless otherwise specified.
5.4 Heat Treatment:
5. Materials and Manufacture
5.4.1 All pipe of the grades shown in Table 1 other than
5.1 Discard:
FPA, FPB, FP1, FP2, FP12, FP91, and FP92 shall be reheated
5.1.1 A sufficient discard shall be made from each ingot to
and furnished in the full-annealed or normalized and tempered
secure freedom from injurious defects. The steel shall have a
condition. If furnished in the normalized and tempered condi-
homogeneous structure.
tion (Note 4), the temperature for tempering shall be 1250 °F
[680 °C] or higher for Grades FP5, FP9, FP21, and FP22, and
5.2 Manufacture:
1200 °F [650 °C] or higher for Grades FP36 and FP11.
5.2.1 Material for forging shall consist of ingots or of
blooms, billets, or solid-rolled bars forged or rolled from an
NOTE 4—It is recommended that the temperature for tempering should
ingot, and cut to the required length by a process that will not
be at least 100 °F [50 °C] above the intended service temperature;
produce injurious defects in the forging. consequently, the purchaser should advise the manufacturer if the service
temperature is to be over 1100 °F [600 °C].
5.2.2 Thematerialshallbeforged(Note3)byhammeringor
pressing, and shall be brought as nearly as practicable to the
5.4.2 Pipe in Grades FPA and FPB as a final heat treatment
finished shape and size by hot working.
shall be either normalized or shall be given a stress relieving
treatment at 1200 to 1300 °F [650 to 705 °C]. Pipe in Grades
NOTE 3—The cross-sectional area of the solid forging shall have a
FP1, FP2, and FP12, as a final heat treatment shall be given a
reduction by forging or by rolling and forging from that of the ingot in the
ratio of not less than 3 to 1. stress-relieving treatment at 1200 to 1300 °F [650 to 705 °C].
A369/A369M−11 (2016)
NOTE 5—Certain of the ferritic steels covered by this specification tend
the product of one remelted ingot of each primary melt. The
to harden if cooled rapidly from above their critical temperature. Some
chemical composition thus determined, or that determined
will air harden, that is, become hardened to an undesirable degree when
from a product analysis made by the tubular product
cooled in air from high temperatures. Therefore, operations involving
manufacturer, shall conform to the requirements specified.
heating such steels above their critical temperatures, such as welding,
hot-bending and other forming operations, should be followed by suitable
7.2 In the case of large ingots poured from two or more
heat treatment.
heats, the weighted average of the chemical determinations of
5.4.3 Except when Supplementary Requirement S6 is speci-
the several heats, made in accordance with 7.1, shall conform
fied by the purchaser, Grade FP91 shall be normalized and
to the requirements specified in Section 6.
tempered by reheating within the temperature range from 1900
to 1975 °F [1040 to 1080 °C], followed by air cooling and
8. Produc
...
This document is not an ASTM standard and is intended only to provide the user of an ASTM standard an indication of what changes have been made to the previous version. Because
it may not be technically possible to adequately depict all changes accurately, ASTM recommends that users consult prior editions as appropriate. In all cases only the current version
of the standard as published by ASTM is to be considered the official document.
Designation: A369/A369M − 11 A369/A369M − 11 (Reapproved 2016)
Standard Specification for
Carbon and Ferritic Alloy Steel Forged and Bored Pipe for
High-Temperature Service
This standard is issued under the fixed designation A369/A369M; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope*Scope
1.1 This specification covers heavy-wall carbon and alloy steel pipe (Note 1) made from turned and bored forgings and is
intended for high-temperature service. Pipe ordered under this specification shall be suitable for bending and other forming
operations and for fusion welding. Selection will depend on design, service conditions, mechanical properties and high-temperature
characteristics.
NOTE 1—The use of the word “pipe” throughout the several sections of this specification is used in the broad sense and intended to mean pipe headers,
or leads.
NOTE 2—The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as “nominal diameter,”
“size,” and “nominal size.”
1.2 Several grades of ferritic steels are covered. Their compositions are given in Table 1.
1.3 Supplementary requirements (S1 to S6) of an optional nature are provided. These supplementary requirements call for
additional tests to be made, and when desired shall be so stated in the order, together with the number of such tests required.
1.4 The values stated in either SI units or inch-pound units are to be regarded separately as standard. Within the text, the SI units
are shown in brackets. The values stated in each system may not be exact equivalents; therefore, each system shall be used
independently of the other. Combining values from the two systems may result in non-conformance with the standard. The
inch-pound units shall apply unless the “M” designation of this specification is specified in the order.
2. Referenced Documents
2.1 ASTM Standards:
A999/A999M Specification for General Requirements for Alloy and Stainless Steel Pipe
E290 Test Methods for Bend Testing of Material for Ductility
E381 Method of Macroetch Testing Steel Bars, Billets, Blooms, and Forgings
2.2 ASME Boiler and Pressure Vessel Code:
Section 1XIX Welding Qualifications
2.3 ANSI Standard:
B 46.1 Surface Texture
2.4 AWS Specifications:
A5.5/A5.5M Specification for Low-Alloy Steel Electrodes for Shielded Metal Arc Welding
A5.23/A5.23M Specification for Low-Alloy Steel Electrodes and Fluxes for Submerged Arc Welding
A5.28/A5.28M Specification for Low-Alloy Steel Electrodes for Gas Shielded Arc Welding
A5.29/A5.29M Low-Alloy Steel Electrodes for Flux Cored Arc Welding
This specification is under the jurisdiction of ASTM Committee A01 on Steel, Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee A01.10
on Stainless and Alloy Steel Tubular Products.
Current edition approved Oct. 1, 2011Sept. 1, 2016. Published November 2011September 2016. Originally approved in 1953. Last previous edition approved in 20102011
as A369/A369MA369/A369M – 11.–10. DOI: 10.1520/A0369_A0369M-11.10.1520/A0369_A0369M-11R16.
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-369 in Section II of that Code.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from American Society of Mechanical Engineers (ASME), ASME International Headquarters, ThreeTwo Park Ave., New York, NY 10016-5990,
http://www.asme.org.
Available from American National Standards Institute (ANSI), 25 W. 43rd St., 4th Floor, New York, NY 10036, http://www.ansi.org.
Available from American Welding Society (AWS), 550 NW LeJeune Rd., Miami, FL 33126, http://www.aws.org.
*A Summary of Changes section appears at the end of this standard
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
A369/A369M − 11 (2016)
TABLE 1 Chemical Requirements
Grade Composition, %
FPA FPB FP1 FP2
Carbon 0.25 max 0.30 max 0.10–0.20 0.10–0.20
Manganese 0.27–0.93 0.29–1.06 0.30–0.80 0.30–0.61
Phosphorus, max 0.035 0.035 0.025 0.025
Sulfur, max 0.035 0.035 0.025 0.025
Silicon 0.10 min 0.10 min 0.10–0.50 0.10–0.30
Chromium . . . 0.50–0.81
Molybdenum . . 0.44–0.65 0.44–0.65
Grade FP5 FP9 FP11 FP12
Carbon 0.15 max 0.15 max 0.05–0.15 0.05–0.15
Manganese 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.61
Phosphorus, max 0.025 0.030 0.025 0.025
Sulfur, max 0.025 0.030 0.025 0.025
Silicon 0.50 max 0.50–1.00 0.50–1.00 0.50 max
Chromium 4.00–6.00 8.00–10.00 1.00–1.50 0.80–1.25
Molybdenum 0.45–0.65 0.90–1.10 0.44–0.65 0.44–0.65
Grade FP21 FP22 FP91 FP92
Carbon 0.05–0.15 0.05–0.15 0.08–0.12 0.07–0.13
Manganese 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.60
Phosphorus, max 0.025 0.025 0.025 0.020
Sulfur, max 0.025 0.025 0.025 0.010
Silicon 0.50 max 0.50 max 0.20–0.50 0.50 max
Chromium 2.65–3.35 1.90–2.60 8.00–9.50 8.50–9.50
Molybdenum 0.80–1.06 0.87–1.13 0.85–1.05 0.30–0.60
Others: W 1.50–2.00
Ni 0.40 max V 0.15–0.25
V 0.18–0.25 Cb 0.04–0.09
Cb 0.06–0.10 N 0.030–0.070
N 0.03–0.07 Ni 0.40 max
Al 0.02 max Al 0.02 max
Ti 0.01 max Ti 0.01 max
Zr 0.01 max Zr 0.01 max
B 0.001–0.006
3. Ordering Information
3.1 Orders for material to this specification should include the following, as required, to describe the desired material
adequately:
3.1.1 Quantity (feet, centimetres, or number of lengths),
3.1.2 Name of material (forged and bored pipe),
3.1.3 Grade (Table 1),
3.1.4 Size (inside diameter and minimum wall thickness),
3.1.5 Length (Permissible Variations in Length Section of Specification A999/A999M),
3.1.6 Verification of tensile and hardness properties at mid-thickness for Grade FP91 (9.2)
3.1.7 End finish (13),
3.1.8 Optional requirements (Sections 8, Supplementary Requirements S1 to S6; 13.2),
3.1.9 Test report required (Certification Section of Specification A999/A999M),
3.1.10 Specification designation, and
3.1.11 Special requirements or exceptions to this specification.
4. General Requirements
4.1 Material furnished under this specification shall conform to the applicable requirements of the current edition of
Specification A999/A999M, unless otherwise provided herein.
5. Materials and Manufacture
5.1 Discard:
5.1.1 A sufficient discard shall be made from each ingot to secure freedom from injurious defects. The steel shall have a
homogeneous structure.
5.2 Manufacture:
5.2.1 Material for forging shall consist of ingots or of blooms, billets, or solid-rolled bars forged or rolled from an ingot, and
cut to the required length by a process that will not produce injurious defects in the forging.
5.2.2 The material shall be forged (Note 3) by hammering or pressing, and shall be brought as nearly as practicable to the
finished shape and size by hot working.
A369/A369M − 11 (2016)
NOTE 3—The cross-sectional area of the solid forging shall have a reduction by forging or by rolling and forging from that of the ingot in the ratio
of not less than 3 to 1.
5.2.3 Unless otherwise specified, the final forging operation shall be followed by a treatment suitable to the grade as specified
in 5.4.
5.3 Machining:
5.3.1 All forgings shall have both the inner and outer surfaces machined.
5.3.2 After heat treatment, the pipe shall be machined to a finish with a roughness value no greater than 250-μin. [6.4-μm]
arithmetical average deviation (AA), terms as defined in ANSI B 46.1-1962, unless otherwise specified.
5.4 Heat Treatment:
5.4.1 All pipe of the grades shown in Table 1 other than FPA, FPB, FP1, FP2, FP12, FP91, and FP92 shall be reheated and
furnished in the full-annealed or normalized and tempered condition. If furnished in the normalized and tempered condition (Note
4), the temperature for tempering shall be 1250 °F [680 °C] or higher for Grades FP5, FP9, FP21, and FP22, and 1200 °F [650
°C] or higher for Grades FP36 and FP11.
NOTE 4—It is recommended that the temperature for tempering should be at least 100 °F [50 °C] above the intended service temperature; consequently,
the purchaser should advise the manufacturer if the service temperature is to be over 1100 °F [600 °C].
5.4.2 Pipe in Grades FPA and FPB as a final heat treatment shall be either normalized or shall be given a stress relieving
treatment at 1200 to 1300 °F [650 to 705 °C]. Pipe in Grades FP1, FP2, and FP12, as a final heat treatment shall be given a
stress-relieving treatment at 1200 to 1300 °F [650 to 705 °C].
NOTE 5—Certain of the ferritic steels covered by this specification tend to harden if cooled rapidly from above their critical temperature. Some will
air harden, that is, become hardened to an undesirable degree when cooled in air from high temperatures. Therefore, operations involving heating such
steels above their critical temperatures, such as welding, hot-bending and other forming operations, should be followed by suitable heat treatment.
5.4.3 Except when Supplementary Requirement S6 is specified by the purchaser, Grade FP91 shall be normalized and tempered
by reheating within the temperature range from 1900 to 1975 °F [1040 to 1080 °C], followed by air cooling and tempering in the
temperature range of 1350 to 1470 °F [730 to 800 °C].
5.4.4 Except when Supplementary Requirement S6 is specified by the purchaser, Grade FP92 shall be normalized and tempered
by reheating within the temperature range of 1900 to 1975 °F [1040 to 1080 °C], followed by air cooling and tempering in the
temperature range of 1350 to 1470 °F [730 to 800 °C].
5.5 Repair by Welding
5.5.1 Weld repair shall be permitted only subject to the approval of the purchaser and in accordance with Specification
A999/A999M.
5.5.2 All repair welds in FP91 shall be made with one of the following welding p
...
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