ASTM A297/A297M-97(2003)

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Designation: A 297/A 297M – 97 (Reapproved 2003)
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/
referenceshouldbemadetoSpecificationA 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/A 217M 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/A 351M 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/A 447M Specification for Steel Castings,
as-cast condition without heat treatment. If heat treatment is
Chromium-Nickel-Iron Alloy (25-12 Class), for High-
required, the treatment shall be established by mutual agree-
Temperature Service
ment between the manufacturer and the purchaser and shall be
A 781/A 781M 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
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
composition prescribed in Table 1.
Stainless Steel, and RelatedAlloys and is the direct responsibility of Subcommittee
A01.18 on Castings.
8. Repair by Welding
Current edition approved April 10, 2003. Published April 2003. Originally
approved in 1946. Last previous edition approved in 1998 as A 297/A 297M – 97
8.1 The composition of the deposited weld metal shall be
(1998).
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.
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A 297/A 297M – 97 (2003)
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 0.04 26
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