ASTM A714-99

Standard Specification for High-Strength Low-Alloy Welded and Seamless Steel Pipe

SCOPE
1.1 This specification covers seamless and welded high-strength low-alloy steel pipe NPS 1/2 to NPS 26, inclusive. Pipe having other dimensions may be furnished provided such pipe complies with all other requirements of this specification. This material is intended for pressure piping service, and other general purposes, where savings in weight or added durability are important.  Note 1-The dimensionless designator NPS (nominal pipe size) has been substituted in this standard for such traditional terms as "nominal diameter," "size," and "nominal size." Note 2-A comprehensive listing of standardized pipe dimensions is contained in ANSI Standard B36.10.
1.2 Class -These high-strength low-alloy steels have enhanced resistance to general atmospheric corrosion by weathering as commonly encountered in rural, urban, marine, and industrial environments. They are supplied in two classes: Class 2, having corrosion resistance equivalent to that of carbon steel with copper (0.20 minimum Cu); and Class 4; having corrosion resistance substantially better than that of Class 2 (Note 3). Class 4 steels when properly exposed to the atmosphere can be used bare (unpainted) for many applications. Note 3-For methods of estimating the atmospheric corrosion resistance of low alloy steels see Guide G101 or actual data.
1.3 Type -Pipe may be furnished in the following types of manufacturing processes: Type F -Furnace-butt welded, continuous welded, Type E -Electric-resistance welded, and Type S -Seamless.  
1.3.1 Pipe ordered under this specification is suitable for welding.  
1.3.2 Type E pipe may be furnished either nonexpanded or cold-expanded at the option of the manufacturer.  
1.3.3 Types F, E, and S pipe are commonly furnished in nonheat-treated condition. Type S pipe may be furnished in normalized (or other) heat-treated condition, when so specified.  
1.3.4 Types F, E, and S pipe in single random lengths may be furnished with hot-dipped galvanized coating of zinc, subject to inquiry to the producer.  
1.3.5 Couplings, when furnished, shall be of the same class, heat-treated condition, and grade of material as the pipe ordered.  
1.4 Grade -This specification designates eight grades of steel composition as listed in Table 1 and corresponding tensile requirements for the grades as listed in Table 2.  
1.4.1 For Class 2 pipe, Grades I, II, or III shall be specified, and copper-bearing steel is required as specified in Table 1.  
1.4.2 For Class 4 pipe, Grades IV, V, VI, VII, or VIII shall be specified. Alternatively, for Class 4, Type S, and Type E pipe, a steel composition corresponding to a grade listed in Table 1 of Specification A588 may be specified, subject to negotiation.  
1.5 When Class 4 pipe is joined by welding or is used in welded construction, the user is cautioned that the selection of welding procedure and resultant composition of fused metal should be suitable for Class 4 material and the intended service.
1.6 The values stated in inch-pound units are to be regarded as the standard.

General Information

• Status: Historical
• Publication Date: 09-Mar-1999
• ICS: 23.040.10 - Iron and steel pipes
• Technical Committee: A01 - Steel, Stainless Steel and Related Alloys
• Drafting Committee: A01.09 - Carbon Steel Tubular Products

Relations

• Replaced By: ASTM A714-99(2003) - Standard Specification for High-Strength Low-Alloy Welded and Seamless Steel Pipe
• Effective Date: 10-Mar-1999

Standards Content (Sample)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
Designation: A 714 – 99
Standard Specification for
High-Strength Low-Alloy Welded and Seamless Steel Pipe
This standard is issued under the fixed designation A 714; 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 1.3.4 Types F, E, and S pipe in single random lengths may
be furnished with hot-dipped galvanized coating of zinc,
1.1 This specification covers seamless and welded high-
1 subject to inquiry to the producer.
strength low-alloy steel pipe NPS ⁄2 to NPS 26, inclusive. Pipe
1.3.5 Couplings, when furnished, shall be of the same class,
having other dimensions may be furnished provided such pipe
heat-treated condition, and grade of material as the pipe
complies with all other requirements of this specification. This
ordered.
material is intended for pressure piping service, and other
1.4 Grade—This specification designates eight grades of
general purposes, where savings in weight or added durability
steel composition as listed in Table 1 and corresponding tensile
are important.
requirements for the grades as listed in Table 2.
NOTE 1—The dimensionless designator NPS (nominal pipe size) has
1.4.1 For Class 2 pipe, Grade I, II, or III shall be specified,
been substituted in this standard for such traditional terms as “nominal
and copper-bearing steel is required as specified in Table 1.
diameter,” “size,” and “nominal size.”
1.4.2 For Class 4 pipe, Grade IV, V, VI, VII, or VIII shall be
NOTE 2—A comprehensive listing of standardized pipe dimensions is
specified. Alternatively, for Class 4, Type S, and Type E pipe,
contained in ANSI Standard B36.10.
a steel composition corresponding to a grade listed in Table 1
1.2 Class—These high-strength low-alloy steels have en-
of Specification A 588/A 588M may be specified, subject to
hanced resistance to general atmospheric corrosion by weath-
negotiation.
ering as commonly encountered in rural, urban, marine, and
1.5 When Class 4 pipe is joined by welding or is used in
industrial environments. They are supplied in two classes:
welded construction, the user is cautioned that the selection of
Class 2, having corrosion resistance equivalent to that of
welding procedure and resultant composition of fused metal
carbon steel with copper (0.20 minimum Cu); and Class 4,
should be suitable for Class 4 material and the intended
having corrosion resistance substantially better than that of
service.
Class 2 (Note 3). Class 4 steels when properly exposed to the
1.6 The values stated in inch-pound units are to be regarded
atmosphere can be used bare (unpainted) for many applica-
as the standard.
tions.
2. Referenced Documents
NOTE 3—For methods of estimating the atmospheric corrosion resis-
tance of low alloy steels see Guide G 101 or actual data.
2.1 ASTM Standards:
A 53 Specification for Pipe, Steel, Black and Hot-Dipped,
1.3 Type—Pipe may be furnished in the following types of
Zinc-Coated, Welded and Seamless
manufacturing processes:
A 90 Test Method for Weight of Coating on Zinc-Coated
Type F—Furnace-butt welded, continuous welded,
(Galvanized) Iron or Steel Articles
Type E—Electric-resistance welded, and
A 370 Test Methods and Definitions for Mechanical Testing
Type S—Seamless.
of Steel Products
1.3.1 Pipe ordered under this specification is suitable for
A 588/A 588M Specification for High Strength Low-Alloy
welding.
Structural Steel with 50 ksi (345 MPa) Minimum Yield
1.3.2 Type E pipe may be furnished either nonexpanded or
Point to 4 in. (100 mm) Thick
cold-expanded at the option of the manufacturer.
A 700 Practices for Packaging, Marking, and Loading
1.3.3 Types F, E, and S pipe are commonly furnished in
Methods for Steel Products for Domestic Shipment
nonheat-treated condition. Type S pipe may be furnished in
A 751 Test Methods, Practices, and Terminology for
normalized (or other) heat-treated condition, when so specified.
Chemical Analysis of Steel Products
1 2
This specification is under the jurisdiction of ASTM Committee A-1 on Steel, Annual Book of ASTM Standards, Vol 01.01.
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee Annual Book of ASTM Standards, Vol 01.06.
A01.09 on Carbon Steel Tubular Products. Annual Book of ASTM Standards, Vol 01.03.
Current edition approved Mar. 10, 1999. Published May 1999. Originally issued Annual Book of ASTM Standards, Vol 01.04.
as A 714 – 75. Last previous edition A 714 – 96. Annual Book of ASTM Standards, Vol 01.05.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A 714–99
TABLE 1 Chemical Requirements
Composition, %
Element Grade I Grade II Grade III Grade IV
Heat Product Heat Product Heat Product Heat Product
Carbon, max 0.22 0.26 0.22 0.26 0.23 0.27 0.10 0.13
Manganese 1.25 max 1.30 max 0.85 to 1.25 1.30 max 1.35 max 1.40 max 0.60 max 0.65 max
A
Phosphorus . . 0.04 max 0.05 max 0.04 max 0.05 max 0.03 to 0.08
Sulfur, max 0.05 0.063 0.05 0.063 0.05 0.06 0.05 0.06
Silicon . . 0.30 max 0.33 max 0.30 max 0.35 max . .
Copper 0.20 min 0.18 min 0.20 min 0.18 min 0.20 min 0.18 min 0.25 to 0.45 0.22 to 0.48
B
Vanadium . . 0.02 min 0.01 min 0.02 min 0.01 min . .
Nickel . . . . . . 0.20 to 0.50 0.17 to 0.53
Chromium . . . . . . 0.80 to 1.20 0.74 to 1.26
Molybdenum . . . . . . . .
Composition, %
Element Grade V Grade VI Grade VII Grade VIII
Heat Product Heat Product Heat Product Heat Product
Carbon, max 0.16 0.20 0.15 0.18 0.12 0.15 0.19 0.23
Manganese 0.40 to 0.35 to 0.50 to 1.00 0.45 to 0.20 to 0.17 to 0.80 to 1.25 0.74 to 1.31
1.01 1.06 1.05 0.50 0.53
A
Phosphorus 0.035 max 0.045 max 0.035 max 0.045 max 0.07 to 0.04 max 0.05 max
0.15
Sulfur, max 0.040 0.050 0.045 0.055 0.05 0.06 0.05 0.06
Silicon . . . . 0.25 to 0.20 to 0.30 to 0.65 0.25 to 0.70
0.75 0.80
Copper 0.80 min 0.75 to 0.30 to 1.00 0.27 to 0.25 to 0.22 to 0.25 to 0.40 0.22 to 0.43
1.25 1.03 0.55 0.58
Vanadium . . . . . . 0.02 to 0.10 0.01 to 0.11
Nickel 1.65 min 1.60 to 0.40 to 1.10 0.35 to 0.65 max 0.68 max 0.40 max 0.43 max
2.24 1.15
Chromium . . 0.30 max 0.33 max 0.30 to 0.24 to 0.40 to 0.65 0.36 to 0.69
1.25 1.31
Molybdenum . . 0.10 to 0.20 0.09 to . . . .
0.21
A
Because of the degree to which phosphorus segregates, product analysis for this element is not technologically appropriate for rephosphorized steels unless
misapplication is clearly indicated.
B
For Grade III, columbium may be used in conformance with the following limits: 0.005 % min (heat) and 0.004 % min (product).
TABLE 2 Tensile Requirements
Class 2 Pipe Class 4 Pipe
A
Grade I Grade II Grade III Grade IV Grade V, Grade V, Grade VI, Grade VII, Grade VIII,
Type F Type E and S Type E and S Type E and S Type E and S
Tensile strength, 70 000 (485) 70 000 (485) 65 000 (450) 58 000 (400) 55 000 (380) 65 000 (450) 65 000 (450) 65 000 (450) 70 000 (485)
min, psi (MPa)
Yield strength, min, 50 000 (345) 50 000 (345) 50 000 (345) 36 000 (250) 40 000 (275) 46 000 (315) 46 000 (315) 45 000 (310) 50 000 (345)
psi (MPa)
B,CB,CB,CB,C
Elongation in 2 in. 22 22 20 22 21
(50.8 mm)
min, %
Elongation in 8 in. 19 18 18 . . . . . .
(203.2 mm)
min, %
A
Not available in wall thicknesses over ⁄2 in.
B
The minimum elongation in 2 in. (50.8 mm) shall be determined by the following equation:
0.2 0.9)
e = 625 000(A /U
where:
e = minimum elongation in 2 in. (50.8 mm), rounded to nearest 0.5 %,
A = cross-sectional area of the tension test specimen in square inches, based on specified outside diameter or nominal specimen width and specified wall thickness
2 2 2
rounded to the nearest 0.01 in. If the area thus calculated is greater than 0.75 in. , then the value of 0.75 in. shall be used, and
U = specified tensile strength, psi.
C
See Table X1.1 for minimum elongation values for various size tension specimens and grades.
B 6 Specification for Zinc (Slab Zinc) G 101 Guide for Estimating the Atmospheric Corrosion
Resistance of Low Alloy Steels
7 8
Annual Book of ASTM Standards, Vol 02.04. Annual Book of ASTM Standards, Vol 03.02.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A 714–99
2.2 ANSI Standard: information purposes only to identify the type of steel applied.
B36.10 Welded and Seamless Wrought Steel Pipe
For Class 4 material, the atmospheric corrosion–resistance
index, calculated on the basis of the chemical composition of
3. Terminology
the steel as described in Guide G 101, shall be 6.0 or higher.
3.1 Definitions of Terms Specific to This Standard:
NOTE 4—The user is cautioned that the Guide G 101 predictive
3.1.1 defect, n—any imperfection of sufficient size or mag-
equation for calculation of an atmospheric corrosion–resistance index has
nitude to be cause for rejection.
been verified only for the composition limits stated in that guide. It is not
3.1.2 imperfection, n—any discontinuity or irregularity
applicable, for example, for Specification A 714 Grade V because the
found in the pipe.
copper and nickel contents of this grade are greater than the limits
specified in Guide G 101.
4. Ordering Information
6.3 Heat Analysis—An analysis of each heat of open-hearth,
4.1 Orders for material under this specification should
basic-oxygen or electric-furnace steel shall be made from a test
include the following, as required, to describe the desired
ingot taken during the pouring of the heat. The chemical
material adequately:
composition thus determined shall conform to the requirements
4.1.1 Quantity (feet, or metres, or number of lengths),
specified in Table 1 for heat analysis.
4.1.2 Name of material (steel pipe),
6.4 Product Analysis:
4.1.3 Class of pipe (Class 2 or Class 4, see 1.2),
6.4.1 An analysis may be made by the purchaser from
4.1.4 Method of manufacture or Type of pipe (Types F, E, or
finished pipe manufactured in accordance with this specifica-
S, see 1.3),
tion, or an analysis may be made from flat-rolled stock from
4.1.5 Grade (see 1.4),
which the welded pipe is manufactured. When product analy-
4.1.6 Heat treatment, when required (see 1.3.3),
ses are made, two sample lengths from each lot of 500 lengths
4.1.7 Surface finish (bare, oiled, coated, or galvanized),
or fraction thereof shall be selected. The chemical composition
4.1.8 Size (either NPS and weight class or schedule number,
thus determined shall conform to the requirements specified in
or both; or outside diameter and nominal wall thickness),
Table 1 for product analysis.
4.1.9 Length (specific or random, see Section 14),
4.1.10 End finish (plain or threaded, see Section 15),
6.4.2 In the event that the chemical composition of one of
4.1.11 Skelp for tension tests, if permitted (see 11.2),
the sample lengths does not conform to the requirements
4.1.12 Couplings, if threaded; no couplings, if not desired;
shown in Table 1 for product analysis, an analysis shall be
couplings power-tight, if so desired,
made on two additional lengths selected from the same lot,
4.1.13 Specification number,
each of which shall conform to the requirements specified in
4.1.14 End use of material, and
Table 1 for product analysis, or the lot is subject to rejection.
4.1.15 Special requirements.
7. Tensile Requirements
5. Materials and Manufacture
7.1 The material shall conform to the requirements as to
5.1 The steel shall be made by one or more of the following
tensile properties prescribed in Table 2 for the grade of Class 2
processes: open-hearth, basic-oxygen, or electric-furnace.
or Class 4 pipe specified.
5.2 Steel may be cast in ingots or may be strand cast. When
7.2 The yield strength corresponding to a permanent offset
steels of different grades are sequentially strand cast, identifi-
of 0.2 % of the gage length of the specimen or to a total
cation of the resultant transition material is required. The
extension of 0.5 % of the gage length under load shall be
producer shall remove the transition material by any estab-
determined.
lished procedure that positively separates the grades.
5.3 The pipe shall be made by the seamless, furnace- 7.3 The test specimen taken across the weld of welded pipe
buttwelded (continuous-welded), or electric resistance-welded shall show a tensile strength not less than the minimum tensile
process.
strength specified for the grade of pipe ordered. This test will
not be required for pipe under NPS 8.
6. Chemical Composition
7.4 Transverse tension test specimens for electric-welded
6.1 When subjected to the heat and product analysis, respec-
pipe NPS 8 and larger shall be taken opposite the weld. All
tively, the steel shall conform to the requirements prescribed in
transverse test specimens shall be approximately 1 ⁄2in. (38.1
Table 1. Chemical analysis shall be in accordance with Test
mm) wide in the gage length, and shall represent the full wall
Methods, Practices, and Terminology A 751.
thickness of the pipe from which the specimen was cut.
6.2 For Grade I, the choice and use of alloying elements,
combined with carbon, manganese, sulfur, and copper within
8. Bending Requirements
the limits prescribed in Table 1 to give the mechanical
8.1 For pipe NPS 2 and under, a sufficient length of pipe
properties prescribed in Table 2, shall be made by the manu-
shall withstand being bent cold through 90° around a cylindri-
facturer and included and reported in the heat analysis for
cal mandrel, the diameter of which is twelve times the nominal
diameter of the pipe, without developing cracks at any portion
9 and without opening the weld. Double-extra-strong pipe need
Available from American National Standards Institute, 11 West 42nd St., 13th
Floor, New York, NY 10036. not be subjected to the bend test.
NOTICE: This standard has either been superceded and replaced by a new version or discontinued.
Contact ASTM International (www.astm.org) for the latest information.
A 714–99
9. Flattening Test the inside, outside, or end surfaces shall occur until the distance
between the plates is less than 0.85 times the original outside
9.1 The flattening test shall be made on pipe over NPS 2
diameter for butt-welded pipe. As a second step, the flattening
with wall thicknesses extra strong and ligh
...