ASTM A739-90a(2006)
(Specification)Standard Specification for Steel Bars, Alloy, Hot-Wrought, for Elevated Temperature or Pressure-Containing Parts, or Both
Standard Specification for Steel Bars, Alloy, Hot-Wrought, for Elevated Temperature or Pressure-Containing Parts, or Both
ABSTRACT
This specification covers hot-wrought, ferritic alloy steel bars for elevated temperature or pressure-containing parts suitable for fusion welding or both. The bars are furnished in two grades: Grade B 11 and Grade B 22. The steel shall be made by on or more of the following primary processes: open-hearth, basic-oxygen, or electric furnace. The bars shall be normalized and tempered. The heat analysis shall conform to the limits for chemical composition specified. The bars as represented by the test specimen shall conform to the tensile requirements specified.
SCOPE
1.1 This specification covers hot-wrought, ferritic alloy steel bars for elevated temperature or pressure-containing parts suitable for fusion welding or both.
1.2 The bars are furnished in the following grades:
Grade B 11: 1.25% chromium, 0.55% molybdenum
Grade B 22: 2.25% chromium, 1.00% molybdenum
1.3 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only.
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Designation: A739 – 90a (Reapproved 2006)
Standard Specification for
Steel Bars, Alloy, Hot-Wrought, for Elevated Temperature or
Pressure-Containing Parts, or Both
This standard is issued under the fixed designation A739; 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.
This standard has been approved for use by agencies of the Department of Defense.
TABLE 1 Chemical Requirements
1. Scope
2 Element Composition, %
1.1 This specification covers hot-wrought, ferritic alloy
Grade B 11 Grade B 22
steel bars for elevated temperature or pressure-containing parts
suitable for fusion welding or both.
Carbon, max 0.05–0.20 0.05–0.15
Manganese 0.40–0.65 0.30–0.60
1.2 The bars are furnished in the following grades:
Phosphorus, max 0.035 0.035
Grade B 11: 1.25 % chromium, 0.55 % molybdenum
Sulfur, max 0.040 0.040
Grade B 22: 2.25 % chromium, 1.00 % molybdenum Silicon 0.50–0.80 0.50 max
Chromium 1.00–1.50 2.00–2.50
1.3 The values stated in inch-pound units are to be regarded
Molybdenum 0.45–0.65 0.90–1.10
as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only
3.1.8 End use.
and are not considered standard.
NOTE 1—A typical description is as follows: 10 000 lb, Ferritic Alloy
2. Referenced Documents
Steel Bars, Hot Wrought Normalized and Tempered, and Descaled,
2.1 ASTM Standards: 1.000-in. diameter by 10 ft, ASTM A739 dated____, Grade B11, Special
Straightened, Special Machined Fittings.
A29/A29M Specification for Steel Bars, Carbon and Alloy,
Hot-Wrought, General Requirements for
4. Materials and Manufacture
A370 Test Methods and Definitions for Mechanical Testing
4.1 Melting Practice—The steel shall be made by one or
of Steel Products
more of the following primary processes: open-hearth, basic-
3. Ordering Information
oxygen, or electric-furnace. The primary melting may incor-
porate separate degassing or refining and may be followed by
3.1 Orders for material under this specification should
secondary melting using electroslag remelting or vacuum arc
include the following information:
remelting. Where secondary melting is employed, the heat
3.1.1 Quantity (weight or number of pieces),
shall be defined as all of the ingots remelted from a single
3.1.2 Name of material (ferritic alloy steel bars),
primary heat.
3.1.3 Condition (hot wrought, normalized and tempered,
4.2 Condition—Unless otherwise specified, bars shall be
machine straightened and descaled),
hot wrought, heat treated, and descaled.
3.1.4 Dimensions (cross-sectional shape, size, and length),
4.3 Heat Treatment:
3.1.5 ASTM designation and date of issue,
4.3.1 The bars shall be normalized and tempered.
3.1.6 Grade (Table 1),
4.3.2 Austenitizing temperature shall be within the range
3.1.7 Additions to the specification, and
from 1700 to 1800°F (927 to 982°C).
4.3.3 Cooling from the austenitizing temperature may be
accomplished by cooling in still air or moving air, at the
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
producer’s option. When permitted by the purchaser, cooling
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
A01.15 on Bars.
fromtheaustenitizingtemperaturemaybeacceleratedbyspray
Current edition approved March 1, 2006. Published March 2006. Originally
or liquid quenching.
approved in 1976. Last previous edition approved in 2000 as A739 – 90a (2000).
4.3.4 The minimum tempering temperature shall be 1200°F
DOI: 10.1520/A0739-90AR06.
For ASME Boiler and Pressure Vessel Code applications see related Specifi- (649°C) for Grade B11 and 1250°F (677°C) for Grade B22.
cation SA-739 in Section II of that code.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
5. Chemical Composition
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
5.1 The heat analysis shall conform to the limits for chemi-
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. cal composition specified in Table 1 for the grade ordered.
Copyright © ASTM International,
...
This document is not anASTM standard and is intended only to provide the user of anASTM 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:A 739–90a(Reapproved 2000) Designation: A739 – 90a (Reapproved 2006)
Standard Specification for
Steel Bars, Alloy, Hot-Wrought, for Elevated Temperature or
Pressure-Containing Parts, or Both
This standard is issued under the fixed designation A739; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope
1.1 Thisspecification covershot-wrought,ferriticalloysteelbarsforelevatedtemperatureorpressure-containingpartssuitable
for fusion welding or both.
1.2 The bars are furnished in the following grades:
Grade B 11: 1.25 % chromium, 0.55 % molybdenum
Grade B 22: 2.25 % chromium, 1.00 % molybdenum
1.3The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information
only.
1.3 The values stated in inch-pound units are to be regarded as standard. The values given in parentheses are mathematical
conversions to SI units that are provided for information only and are not considered standard.
2. Referenced Documents
2.1 ASTM Standards:
A29/A29M Specification for Steel Bars, Carbon and Alloy, Hot-Wrought and Cold-Finished, Hot-Wrought, General
Requirements for
A370 Test Methods and Definitions for Mechanical Testing of Steel Products
3. Ordering Information
3.1 Orders for material under this specification should include the following information:
3.1.1 Quantity (weight or number of pieces),
3.1.2 Name of material (ferritic alloy steel bars),
3.1.3 Condition (hot wrought, normalized and tempered, machine straightened and descaled),
3.1.4 Dimensions (cross-sectional shape, size, and length),
3.1.5 ASTM designation and date of issue,
3.1.6 Grade (Table 1),
3.1.7 Additions to the specification, and
3.1.8 End use.
NOTE 1—A typical description is as follows: 10 000 lb, Ferritic Alloy Steel Bars, Hot Wrought Normalized and Tempered, and Descaled, 1.000-in.
diameter by 10 ft, ASTM A739 dated____, Grade B11, Special Straightened, Special Machined Fittings.
4. Materials and Manufacture
4.1 Melting Practice—The steel shall be made by one or more of the following primary processes: open-hearth, basic-oxygen,
orelectric-furnace.Theprimarymeltingmayincorporateseparatedegassingorrefiningandmaybefollowedbysecondarymelting
using electroslag remelting or vacuum arc remelting. Where secondary melting is employed, the heat shall be defined as all of the
ingots remelted from a single primary heat.
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel,Steel and RelatedAlloys and is the direct responsibility of Subcommittee
A01.15 on Bars.
Current edition approved Aug. 31, 1990. Published October 1990. Originally published as A 739–76. Last previous edition A 739–90.
Current edition approved March 1, 2006. Published March 2006. Originally approved in 1976. Last previous edition approved in 2000 as A739 – 90a (2000). DOI:
10.1520/A0739-90AR06.
For ASME Boiler and Pressure Vessel Code applications see related Specification SA-739 in Section II of that code.
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. ForAnnualBookofASTMStandards
, Vol 01.05.volume information, refer to the standard’s Document Summary page on the ASTM website.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A739 – 90a (2006)
TABLE 1 Chemical Requirements
Element Composition, %
Grade B 11 Grade B 22
Carbon, max 0.05–0.20 0.05–0.15
Manganese 0.40–0.65 0.30–0.60
Phosphorus, max 0.035 0.035
Sulfur, max 0.040 0.040
Silicon 0.50–0.80 0.50 max
Chromium 1.00–1.50 2.00–2.50
Molybdenum 0.45–0.65 0.90–1.10
4.2 Condition—Unless otherwise specified, bars shall be hot wrought, heat treated, and descaled.
4.3 Heat Treatment:
4.3.1 The bars shall be normalized and tempered.
4.3.2 Austenitizing temperature shall be within the range from 1700 to 1800°F (927 to 982°C).
4.3.3 Cooling from the austenitizing temperature may be accomplished by cooling in still air or moving air, at the producer’s
option. When permitted by the purcha
...
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