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ASTM A734/A734M-87a(1997)

(Specification)

Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered

Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered

SCOPE
1.1 This specification covers quenched-and-tempered alloy steel and high-strength low-alloy steel plates for piping components and welded pressure vessels.  
1.2 Two types are covered, which provide two different chemical compositions with the same tensile requirements. Both types are quenched-and-tempered to enhance mechanical properties.  
1.2.1 Type A is an alloy steel intended for use at low ambient temperatures of -80°F [-60°C] and higher.  
1.2.2 Type B is a high-strength low-alloy steel intended for use at ambient temperatures of -20°F [-30°C] and higher.  
1.3 The maximum thickness of plates is limited only by the capacity of the chemical composition and heat treatment to meet the specified mechanical property requirements. Individual manufacturers should be consulted on thickness limitations since current industry limitations have not been ascertained to date.  
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. The values stated in each system are not exact equivalents; therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with the specification.

General Information

Status
Historical
Publication Date
09-Sep-1997
ICS
77.140.30 - Steels for pressure purposes
Technical Committee
A01 - Steel, Stainless Steel and Related Alloys
Drafting Committee
A01.11 - Steel Plates for Boilers and Pressure Vessels
Current Stage
Ref Project

Relations

Replaced By
ASTM A734/A734M-87a(2003) - Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered
Effective Date
10-Sep-2003

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ASTM A734/A734M-87a(1997) - Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-TemperedASTM A734/A734M-87a(1997) - Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered
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ASTM A734/A734M-87a(1997) - Standard Specification for Pressure Vessel Plates, Alloy Steel and High-Strength Low-Alloy Steel, Quenched-and-Tempered
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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 734/A734M – 87a (Reapproved 1997)
Standard Specification for
Pressure Vessel Plates, Alloy Steel and High-Strength Low-
Alloy Steel, Quenched-and-Tempered
This standard is issued under the fixed designation A 734/A734M; 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 A 578/A578M Specification for Straight-Beam Ultrasonic
Examination of Plain and Clad Steel Plates for Special
1.1 This specification covers quenched-and-tempered alloy
Applications
steel and high-strength low-alloy steel plates for piping com-
ponents and welded pressure vessels.
3. Manufacture
1.2 Two types are covered, which provide two different
3.1 Steelmaking Practice:
chemical compositions with the same tensile requirements.
3.1.1 The steel shall be killed and shall conform to the fine
Both types are quenched-and-tempered to enhance mechanical
austenitic grain size requirement of Specification A 20/A 20M.
properties.
1.2.1 Type A is an alloy steel intended for use at low
4. Heat Treatment
ambient temperatures of −80°F [−60°C] and higher.
4.1 The plates shall be heat treated by quenching and
1.2.2 Type B is a high-strength low-alloy steel intended for
tempering. The austenitizing temperature shall be 1725°F
use at ambient temperatures of −20°F [−30°C] and higher.
[940°C] maximum. Tempering temperature shall be 1150 to
1.3 The maximum thickness of plates is limited only by the
1300°F [620 to 705°C].
capacity of the chemical composition and heat treatment to
4.2 If the purchaser elects to perform the heat treatment, the
meet the specified mechanical property requirements. Indi-
material shall be accepted on the basis of mill tests made from
vidual manufacturers should be consulted on thickness limita-
test coupons heat treated in accordance with the purchase order
tions since current industry limitations have not been ascer-
requirements. If the test coupon heat treatment is not indicated
tained to date.
on the purchase order, the manufacturer shall heat treat the test
1.4 The values stated in either inch-pound units or SI units
coupons under conditions he considers appropriate. The manu-
are to be regarded separately as standard. Within the text, the
facturer shall inform the purchaser of the heat-treat procedure
SI units are shown in brackets. The values stated in each
followed in treatment of the test coupon.
system are not exact equivalents; therefore, each system must
be used independently of the other. Combining values from the
5. General Requirements and Basis of Purchase
two systems may result in nonconformance with the specifi-
5.1 Material supplied to this material specification shall
cation.
conform to the requirements of Specification A 20/A 20M.
These requirements outline the testing and retesting methods
2. Referenced Documents
and procedures, permissible variations in dimensions and
2.1 ASTM Standards:
weight, quality, repair of defects, marking, loading, etc.
A 20/A20M Specification for General Requirements for
2 5.2 Specification A 20/A 20M also establishes the rules for
Steel Plates for Pressure Vessels
compliance to the basis of purchase when purchasing material
A 435/A435M Specification for Straight-Beam Ultrasonic
2 to this specification.
Examination of Steel Plates
5.3 Certain supplementary requirements considered suitable
A 577/A577M Specification for Ultrasonic Angle-Beam
2 for use with this specification are listed at the end of the
Examination of Steel Plates
specification. These include some of the standardized supple-
mentary requirements listed in Specification A 20/A 20M as
well as additional ones unique to this specification.
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
A01.11 on Steel for Boilers and Pressure Vessels.
6. Chemical Requirements
Current edition approved July 31, 1987. Published August 1987. Originally
6.1 The steel shall conform to the requirements as to
published as A 734 – 76. Last previous edition A 734/A 734M – 87.
An
...

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1  
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2  
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3  
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H, S  
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P  
4 in. [100 mm]    
F  
2.50 in. [65 mm]    
E, Q  
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Mechanical Requirements  
Yield Strength, min  
Tensile Strength, min  
Grade  
ksi  
MPa  
ksi  
MPa  
A  
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45  
310  
B  
30  
205  
50  
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C  
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45  
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515  
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Width, in. [mm]    
Thickness, in. [mm]  
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sheet (coils only)  
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This specification covers standard requirements for three grades of carbon-manganese-silicon steel, designated Grades A, B, and C. Grade C may be produced with a boron addition. The plates shall be quenched and tempered and shall be intended for welded-layered pressure vessels. The steel shall be killed and shall conform to the fine austenitic grain size requirement. Heat and product analyses shall be performed wherein the material shall conform to the required chemical composition for carbon, manganese, phosphorus, sulfur, silicon, copper, nickel, chromium, molybdenum, vanadium, and boron. The steel plate shall undergo tension test and shall conform to tensile requirements such as tensile strength, yield strength, and elongation.
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ABSTRACT
This specification covers quenched and tempered vacuum-treated carbon and alloy steel forgings for pressure vessels, such as those used in reactor systems, specifically, vessel closures, shells, flanges, tube sheets, rings, heads, and similar parts. Steels shall be manufactured by basic electric-furnace process except when secondary ladle refining or remelting process is employed, and shall be vacuum treated prior to or during the pouring of the ingot. Materials shall also go through preliminary heat treatment and quenching for mechanical properties. Heat and product analyses shall be executed to evaluate the conformance of the forgings with specified chemical requirements. Tension and Charpy impact tests shall also be performed to examine the conformance of steel specimens with the following mechanical properties: tensile strength, yield strength, elongation, and reduction of area. Nondestructive inspection procedures, such as magnetic particle examination, and longitudinal wave and angle beam ultrasonic examination, shall also be carried out. Repair welding may be permitted at the option of the purchaser.
SCOPE
1.1 This specification2 covers quenched and tempered vacuum-treated carbon and alloy steel forgings for pressure vessels such as those used in reactor systems. Specifically, it covers forgings for vessel closures, shells, flanges, tube sheets, rings, heads, and similar parts.  
1.2 All grades are considered weldable under proper conditions. Welding technique is of fundamental importance, and it is presupposed that welding procedure and inspection will be in accordance with approved methods for the grade of material used.  
1.3 The values stated in either SI units or inch-pound units are to be regarded separately as standard. 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.  
1.4 Unless the order specifies the applicable “M” specification designation, the material shall be furnished to the inch-pound units.
Note 1: Grades 1 and 1A are composed of different chemistries but have the same mechanical requirements.
Note 2: Designations have been changed as follows:    
Current  
Formerly  
Grade 1  
Class 1  
Grade 1A  
Class 1A  
Grade 2 Class 1  
Class 2  
Grade 2 Class 2  
Class 2A  
Grade 3 Class 1  
Class 3  
Grade 3 Class 2  
Class 3A  
Grade 4N Class 1  
Class 4  
Grade 4N Class 2  
Class 4A  
Grade 4N Class 3  
Class 4B  
Grade 5 Class 1  
Class 5  
Grade 5 Class 2  
Class 5A  
Grade 22 Class 3  
Class 22B  
Grade 22 Classes 4, 5, 6, and 7  
Grade 3V  
Class 3V  
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ASTM A387/A387M-17a(2023)(Specification)
Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum

ABSTRACT
This specification covers chromium-molybdenum alloy steel plates for welded broilers and pressure vessels designed for elevated temperature service. Materials considered under this specification are available in grades 2, 12, 11, 22, 22L, 21, 21L, 5, 9 and 91. The steel materials shall be killed and shall be thermally treated. The steel specimens shall undergo heat analysis and product analysis and shall conform to the chemical requirements for carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, vanadium, columbium, boron, nitrogen, aluminum, titanium, and zirconium. The steel specimens shall also undergo tension tests and shall conform to the required values of tensile strength, yield strength, and elongation.
SCOPE
1.1 This specification2 covers chromium-molybdenum alloy steel plates intended primarily for welded boilers and pressure vessels designed for elevated temperature service.  
1.2 Plates are available under this specification in several grades having different alloy contents as follows:    
Nominal  
Nominal  
Chromium  
Molybdenum  
Grade  
Content, %  
Content, %  
2  
0.50  
0.50  
12  
1.00  
0.50  
11  
1.25  
0.50  
22  
2.25  
1.00  
21  
3.00  
1.00  
5  
5.00  
0.50  
9  
9.00  
1.00  
91  
9.00  
1.00  
1.3 Each grade except Grade 91 is available in two classes of tensile strength levels as defined in the Tensile Requirements tables. Grade 91 is available only as Class 2. Grade 91 consists of two types, with Type 2 differentiated from Type 1 by requiring restricted composition for the enhancement of creep resistance.
Note 1: Grade 911, previously covered by this specification, is now covered by Specification A1017/A1017M.  
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ASTM A203/A203M-23(Specification)
Standard Specification for Pressure Vessel Plates, Alloy Steel, Nickel

ABSTRACT
This specification covers nickel-alloy steel plates intended primarily for welded pressure vessels. As a steel making practice, the steel shall be killed and shall conform to fine grain size requirements. The heat treatment requirements for all plates are presented, and all plates under Grades A, B, D, and E shall be normalized as required. The steel shall conform to the required chemical compositions. Two mechanical test requirements are presented that includes, tension test requirements and impact test requirements.
SCOPE
1.1 This specification2 covers nickel-alloy steel plates intended primarily for welded pressure vessels.  
1.2 Plates under this specification are available with four strength levels and two nickel compositions as follows:    
Grade  
Nominal Nickel
Content %  
Yield Strength, min, ksi [MPa]  
Tensile Strength, min, ksi [MPa]  
A  
2.25  
37 [255]  
65 [450]  
B  
2.25  
40 [275]  
70 [485]  
D  
3.50  
37 [255]  
65 [450]  
E  
3.50  
40 [275]  
70 [485]  
F  
3.50  
2 in. [50 mm] and under  
55 [380]  
80 [550]  
Over 2 in. [50 mm]  
50 [345]  
75 [515]  
1.3 The maximum thickness of plates is limited only by the capacity of the composition to meet the specified mechanical property requirements.  
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. The values stated in each system are not exact equivalents. Therefore, each system must be used independently of the other. Combining values from the two systems may result in nonconformance with this specification.  
1.5 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

  • Technical specification
    3 pages
    English language
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  • Technical specification
    3 pages
    English language
    sale 15% off