ASTM A736/A736M-88(2000)

NOTICE: This standard has either been superceded and replaced by a new version or discontinued.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 736/A 736M – 88 (Reapproved 2000)
Standard Specification for
Pressure Vessel Plates, Low-Carbon Age-Hardening Nickel-
Copper-Chromium-Molybdenum-Columbium and Nickel-
Copper-Manganese-Molybdenum-Columbium Alloy Steel
This standard is issued under the fixed designation A 736/A 736M; 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 thickness and 90 ksi for plates over ⁄4 in. in thickness. The
maximum thickness of Grade C, Class 3, plates is 2 in. [50
1.1 This spesssscification covers two grades of low-carbon
mm].
age-hardening alloy steel plates for welded pressure vessels
1.3 This specification is expressed in both inch-pound units
and piping components. The two grades are nickel-copper-
and in SI units. However, unless the order specifies the
chromium-molybdenum-columbium and nickel-copper-
applicable “M” specification designation (SI units), the mate-
manganese-molybdenum-columbium steels.
rial shall be furnished in inch-pound units.
1.2 Plates under this specification are available in three
1.4 The values stated in either inch-pound units or SI units
Classes, as follows:
are to be regarded separately as standard. Within the text, the
1.2.1 Class 1—As-rolled and precipitation heat treated.
3 SI units are shown in brackets. The values stated in each
Available in thicknesses of ⁄4 in. [20 mm] and under. Grade A,
system are not exact equivalents. Therefore, each system must
Class 1 has a minimum specified tensile strength of 90 ksi.
be used independently of the other. Combining values from the
Grade C, Class 1 has a minimum specified tensile strength of
two systems may result in nonconformance with this specifi-
100 ksi.
cation.
1.2.2 Class 2—Normalized and precipitation heat treated.
1.2.2.1 Available in Grade A only. Grade A has minimum
2. Referenced Documents
specified tensile strength of 72 ksi for thinner plates and 65 and
2.1 ASTM Standards:
60 ksi for thicker plates, with the minimum tensile strength
A 20/A20M Specification for General Requirements for
dependent upon the plate thickness. The maximum thickness of
Steel Plates for Pressure Vessels
Grade A, Class 2 is limited only by the capacity of the chemical
A 435/A435M Specification for Straight-Beam Ultrasonic
composition and heat treatment to meet the specified mechani-
Examination of Steel Plates
cal property requirements; however, current practice usually
A 577/A577M Specification for Ultrasonic Angle-Beam
limits the maximum thickness to 8 in. [200 mm].
Examination of Steel Plates
1.2.3 Class 3—Quenched and precipitation heat treated.
A 578/A578M Specification for Straight-Beam Ultrasonic
1.2.3.1 Available as Grade A with a minimum specified
Examination of Plain and Clad Steel Plates for Special
tensile strength of 85 ksi for thinner plates and 75 and 70 ksi
Applications
for thicker plates, with the minimum tensile strength dependent
upon the plate thickness. The maximum thickness of Grade A,
3. General Requirements and Ordering Information
Class 3 plates is limited only by the capacity of the chemical
3.1 Material supplied to this specification shall conform to
composition and heat treatment to meet the specified mechani-
the requirements of Specification A 20/A 20M. These require-
cal property requirements; however, current practice usually
ments outline the testing and retesting methods and procedures,
limits the maximum thickness to 8 in. [200 mm].
permissible variations in dimensions and weight, quality, repair
1.2.3.2 Available as Grade C with a specified minimum
of defects, marking, loading, etc.
tensile strength of 95 ksi for plates ⁄4 in. [20 mm] and under in
3.2 Specification A 20/A 20M also establishes the rules for
compliance to the basis of purchase when purchasing material
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
to this specification.
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
3.3 Certain supplementary requirements considered suitable
A01.11 on Steel Plates for Boilers and Pressure Vessels.
for use with this specification are listed at the end of this
Current edition approved Jan. 29, 1988. Published May 1988. Originally
published as A 736 – 76. Last previous edition A 736/A 736M – 87.
For ASME Boiler and Pressure Vessel Code applications, see related Specifi-
cation SA-736 in Section II of that Code. Annual Book of ASTM Standards, Vol 01.04.
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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.
A 736/A 736M – 88 (2000)
TABLE 1 Chemical Requirements
specification. These include some of the standardized supple-
mentary requirements listed in Specification A 20/A 20M as Composition, %
Element
well as additional ones unique to this specification.
Grade A Grade C
Carbon, max
Heat analysis 0.07 0.07
4. Manufacture
Product analysis 0.09 0.090
Manganese
4.1 The steel shall be killed and shall conform to the fine
Heat analysis 0.40–0.70 1.30–1.65
austenitic grain size requirement of Specification A 20/A 20M.
Product analysis 0.35–0.78 1.21–1.77
A
Phosphorus, max 0.025 0.025
A
Sulfur, max 0.025 0.025
5. Heat Treatment
Silicon, max
Heat analysis 0.40 0.40
5.1 Class 1—The material shall be precipitation heat treated
Product analysis 0.45 0.45
at a temperature in the range from 1000 to 1300°F [540 to
Chromium
705°C] for a time to be determined by the material manufac- Heat analysis 0.60–0.90 . . .
Product analysis 0.56–0.94 . . .
turer.
Nickel
Heat analysis 0.70–1.00 0.70–1.00
5.2 Class 2—The material shall be normalized at a tempera-
Product analysis 0.67–1.03 0.67
...