ASTM A297/A297M-97(1998)

NOTICE: This standard has either been superseded and replaced by a new version or withdrawn.
Contact ASTM International (www.astm.org) for the latest information.
An American National Standard
Designation: A 297/A 297M – 97 (Reapproved 1998)
Standard Specification for
Steel Castings, Iron-Chromium and Iron-Chromium-Nickel,
Heat Resistant, for General Application
This standard is issued under the fixed designationA297/A297M; 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 3. General Conditions for Delivery
1.1 This specification covers iron-chromium and iron- 3.1 Material furnished to this specification shall conform to
chromium-nickel alloy castings for heat-resistant service. The the requirements of Specification A 781/A 781M, including
grades covered by this specification are general purpose alloys any supplementary requirements that are indicated in the
and no attempt has been made to include heat-resisting alloys purchase order. Failure to comply with the general require-
used for special production application. ments of Specification A 781/A 781M constitutes nonconfor-
mance with this specification. In case of conflict between the
NOTE 1—For heat-resisting alloys used for special product application,
requirements of this specification and Specification A 781/
reference should be made to SpecificationA 351/A 351M,A 217/A 217M,
A 781M, this specification shall prevail.
and A 447/A 447M.
1.2 The values stated in either inch-pound units or SI units
4. Ordering Information
are to be regarded separately as standard. Within the text, the
4.1 The inquiry and order should include or indicate the
SI units are shown in brackets. The values stated in each
following:
system are not exact equivalents; therefore, each system must
4.1.1 A description of the casting by pattern number or
be used independently of the other. Combining values from the
drawing (dimensional tolerances shall be included on the
two systems may result in nonconformance with the specifi-
casting drawing),
cation.
4.1.2 Grade of steel,
4.1.3 Options in the specification, and
2. Referenced Documents
4.1.4 The supplementary requirements desired including the
2.1 ASTM Standards:
standards of acceptance.
A 217/A217M Specification for Steel Castings, Martensitic
Stainless and Alloy, for Pressure–Containing Parts, Suit-
5. Process
able for High-Temperature Service
5.1 Alloys shall be made by the following processes:
A 351/A351M Specification for Castings, Austenitic, Aus-
electric-arc, electric-induction, or other approved processes.
tenitic–Ferritic (Duplex), for Pressure–Containing Parts
A 370 Test Methods and Definitions for MechanicalTesting
6. Heat Treatment
of Steel Products
6.1 Castings for heat-resistant service may be shipped in the
A 447/A447M Specification for Steel Castings, Chromium-
as-cast condition without heat treatment. If heat treatment is
Nickel-Iron Alloy (25-12 Class), for High-Temperature
required, the treatment shall be established by mutual agree-
Service
ment between the manufacturer and the purchaser and shall be
A 781/A781M Specification for Castings, Steel and Alloy,
so specified in the inquiry, contract, or order.
Common Requirements, for General Industrial Use
7. Chemical Composition
7.1 Alloys shall conform to the requirements as to chemical
1 composition prescribed in Table 1.
This specification is under the jurisdiction of ASTM Committee A-1 on Steel,
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
8. Repair by Welding
A01.18 on Castings.
Current edition approved Nov. 10, 1997. Published October 1998. Originally
8.1 The composition of the deposited weld metal shall be
published as A 297 – 46 T. Last previous edition A 297/A 297M – 89.
similar to the composition of the casting.All weld repairs shall
Annual Book of ASTM Standards, Vol 01.02.
Annual Book of ASTM Standards, Vol 01.03. be subjected to the same inspection standards as the casting.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
A 297/A 297M – 97 (1998)
TABLE 1 Chemical Requirements
Composition, %
Grade Type
Manganese, Silicon, Phosphorus, Sulfur, Molybdenum,
Carbon Chromium Nickel
A
max max max max max
HF 19 Chromium, 9 Nickel 0.20–0.40 2.00 2.00 0.04 0.04 18.0–23.0 8.0–12.0 0.50
HH 25 Chromium, 12 Nickel 0.20–0.50 2.00 2.00 0.04 0.04 24.0–28.0 11.0–14.0 0.50
HI 28 Chromium, 15 Nickel 0.20–0.50 2.00 2.00 0.04 0.04 26.0–30.0 14.0–18.0 0.50
HK 25 Chromium, 20 Nickel 0.20–0.60 2.00 2.00 0.04 0.04 24.0–28.0 18.0–22.0 0.50
HE 29 Chromium, 9 Nickel 0.20–0.50 2.00 2.00 0.04 0.04 26.0–30.0 8.0–11.0 0.50
HT 15 Chromium, 35 Nickel 0.35–0.75 2.00 2.50 0.04 0.04 15.0–19.0 33.0–37.0 0.50
HU 19 Chromium, 39 Nickel 0.35–0.75 2.00 2.50 0.04 0.04 17.0–21.0 37.0–41.0 0.50
HW 12 Chromium, 60 Nickel 0.35–0.75 2.00 2.50 0.04 0.04 10.0–14.0 58.0–62.0 0.50
HX 17 Chromium, 66 Nickel 0.35–0.75 2.00 2.50 0.04 0.04 15.0–19.0 64.0–68.0 0.50
HC 28 Chromium 0.50 max 1.00 2.00 0.04 0.04 26.0–30.0 4.00 max 0.50
HD 28 Chromium, 5 Nickel 0.50 max 1.50 2.00 0.04
...