ASTM A387/A387M-99

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Designation: A 387/A 387M – 99 Used in USDOE-NE Standards
AMERICAN SOCIETY FOR TESTING AND MATERIALS
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Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Pressure Vessel Plates, Alloy Steel, Chromium-
Molybdenum
This standard is issued under the fixed designation A 387/A 387M; 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 Steel Plates for Pressure Vessels
A 370 Test Methods and Definitions for Mechanical Testing
1.1 This specification covers chromium-molybdenum alloy
of Steel Products
steel plates intended primarily for welded boilers and pressure
A 435/A 435M Specification for Straight-Beam Ultrasonic
vessels designed for elevated temperature service.
Examination of Steel Plates
1.2 Plates are available under this specification in several
A 577/A 577M Specification for Ultrasonic Angle-Beam
grades having different alloy contents as follows:
Examination of Steel Plates
Nominal Nominal
A 578/A 578M Specification for Straight-Beam Ultrasonic
Chromium Molybde-
num
Examination of Plain and Clad Steel Plates for Special
Grade Content, % Content, %
Applications
2 0.50 0.50
12 1.00 0.50
3. General Requirements and Ordering Information
11 1.25 0.50
22, 22L 2.25 1.00
3.1 Material supplied to this material specification shall
21, 21L 3.00 1.00
conform to Specification A 20/A 20M. These requirements
5 5.00 0.50
9 9.00 1.00
outline the testing and retesting methods and procedures,
91 9.00 1.00
permissible variations in dimensions and weight, quality and
911 9.00 1.00
repair of defects, marking, loading, etc.
1.3 Each grade except Grades 21L, 22L, 91 and 911 is
3.2 Specification A 20/A 20M also establishes the rules for
available in two classes of tensile strength levels as defined in
the ordering information that should be complied with when
the Tensile Requirements tables, depending on heat treatment.
purchasing material to this specification.
In the annealed condition all grades are available only as Class
3.3 In addition to the basic requirements of this specifica-
1. Grades 21L and 22L are available only as Class 1. Grade 91
tion, certain supplementary requirements are available when
and 911 are available only as Class 2.
additional control, testing, or examination is required to meet
1.4 The maximum thickness of plates is limited only by the
end use requirements. These include:
capacity of the composition to meet the specified mechanical
3.3.1 Vacuum treatment,
property requirements.
3.3.2 Additional or special tension testing,
1.5 The values stated in either inch-pound units or SI units
3.3.3 Impact testing, and
are to be regarded separately as standard. Within the text, the
3.3.4 Nondestructive examination.
SI units are shown in brackets. The values stated in each
3.4 The purchaser is referred to the listed supplementary
system are not exact equivalents. Therefore, each system must
requirements in this specification and to the detailed require-
be used independently of the other. Combining values from the
ments in Specification A 20/A 20M. If the requirements of this
two systems may result in nonconformance with this specifi-
specification are in conflict with the requirements of Specifi-
cation.
cation A 20/A 20M, the requirements of this specification shall
prevail.
2. Referenced Documents
2.1 ASTM Standards:
4. Manufacture
A 20/A 20M Specification for General Requirements for
4.1 Steelmaking Practice—The steel shall be killed.
5. Heat Treatment
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
Stainless Steel, and Related Alloys and is the direct responsibility of Subcommittee
5.1 Except for Grades 91 and 911, all plates shall be
A01.11 on Steel Plates for Boilers and Pressure Vessels.
thermally treated either by annealing, normalizing- and
Current edition approved March 10, 1999. Published June 1999. Originally
published as A 387 – 55 T. Last previous edition A 387/A 387M – 98.
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA-387/SA-387M in Section II of that Code.
Annual Book of ASTM Standards, Vol 01.04.
Annual Book of ASTM Standards, Vol 01.01.
A 387/A 387M
TABLE 1 Chemical Requirements
Composition, %
Element
Grade 2 Grade 12 Grade 11 Grade 22 Grade 22L Grade 21 Grade 21L Grade 5 Grade 9 Grade 91 Grade 911
Carbon:
A A
Heat analysis 0.05–0.21 0.05–0.17 0.05–0.17 0.05–0.15 0.10 max 0.05–0.15 0.10 max 0.15 max 0.15 max 0.08–0.12 0.09–0.13
A A
Product analysis 0.04–0.21 0.04–0.17 0.04–0.17 0.04–0.15 0.12 max 0.04–0.15 0.12 max 0.15 max 0.15 max 0.06–0.15 0.08–0.14
Manganese:
Heat analysis 0.55–0.80 0.40–0.65 0.40–0.65 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.60 0.30–0.60
Product analysis 0.50–0.88 0.35–0.73 0.35–0.73 0.25–0.66 0.25–0.66 0.25–0.66 0.25–0.66 0.25–0.66 0.25–0.66 0.25–0.66 0.25–0.66
Phosphorus, max:
Heat analysis 0.035 0.035 0.035 0.035 0.035 0.035 0.035 0.035 0.030 0.020 0.020
Product analysis 0.035 0.035 0.035 0.035 0.035 0.035 0.035 0.035 0.030 0.025 0.025
Sulfur, max:
Heat analysis 0.035 0.035 0.035 0.035 0.035 0.035 0.035 0.030 0.030 0.010 0.010
Product analysis 0.035 0.035 0.035 0.035 0.035 0.035 0.035 0.030 0.030 0.012 0.012
Silicon:
Heat analysis 0.15–0.40 0.15–0.40 0.50–0.80 0.50 max 0.50 max 0.50 max 0.50 max 0.50 max 1.00 max 0.20–0.50 0.10–0.50
Product analysis 0.13–0.45 0.13–0.45 0.44–0.86 0.50 max 0.50 max 0.50 max 0.50 max 0.55 max 1.05 max 0.18–0.56 0.08–0.56
Chromium:
Heat analysis 0.50–0.80 0.80–1.15 1.00–1.50 2.00–2.50 2.00–2.50 2.75–3.25 2.75–3.25 4.00–6.00 8.00–10.00 8.00–9.50 8.50–10.50
Product analysis 0.46–0.85 0.74–1.21 0.94–1.56 1.88–2.62 1.88–2.62 2.63–3.37 2.63–3.37 3.90–6.10 7.90–10.10 7.90–9.60 8.40–10.70
Molybdenum:
Heat analysis 0.45–0.60 0.45–0.60 0.45–0.65 0.90–1.10 0.90–1.10 0.90–1.10 0.90–1.10 0.45–0.65 0.90–1.10 0.85–1.05 0.90–1.10
Product analysis 0.40–0.65 0.40–0.65 0.40–0.70 0.85–1.15 0.85–1.15 0.85–1.15 0.85–1.15 0.40–0.70 0.85–1.15 0.80–1.10 0.85–1.15
Nickel, max:
Heat analysis . . . . . . . . . 0.40 0.40
Product analysis . . . . . . . . . 0.43 0.43
Vanadium:
Heat analysis . . . . . . . . . 0.18–0.25 0.18–0.25
Product analysis . . . . . . . . . 0.16–0.27 0.16–0.27
Columbium:
Heat analysis . . . . . . . . . 0.06–0.10 0.060–0.10
Product analysis . . . . . . . . . 0.05–0.11 0.05–0.11
Boron:
Heat analysis . . . . . . . . . . 0.0003–0.006
Product analysis . . . . . . . . . . 0.0002–0.007
Nitrogen:
Heat analysis . . . . . . . . . 0.030–0.070 0.04–0.09
Product analysis . . . . . . . . . 0.025–0.080 0.035–0.095
Aluminum, max:
Heat analysis . . . . . . . . . 0.04 0.04
Product analysis . . . . . . . . . 0.05 0.05
Tungsten:
Heat analysis . . . . . . . . . . 0.90–1.10
Product analysis . . . . . . . . . . 0.85–1.15
A
The carbon content for plates over 5 in. [125 mm] in thickness is 0.17 max on product analysis.

A 387/A 387M
-tempering, or, when permitted by the purchaser, accelerated 5.3 For plates ordered without the heat treatment required
cooling from the austenitizing temperature by air blasting or by 5.1, heat treatment of the plates to conform to 5.1 and to
liquid quenching, followed by tempering. Minimum tempering Table 1 or Table 2, as applicable, shall
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