ASTM A447/A447M-10
(Specification)Standard Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service
Standard Specification for Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class), for High-Temperature Service
ABSTRACT
This specification covers iron-base, heat-resisting alloy castings, intended for structural elements, containers, and supports in electric furnaces, petroleum still tube supports, and for similar applications. The alloys shall be electric-furnace processed and heat treated. The castings shall conform to the required chemical compositions of nickel, chromium, carbon, nitrogen, manganese, silicon, phosphorus, sulfur, and iron. The specimens shall undergo tension test after aging and short-time high-temperature tension test and shall conform to the required values of tensile strength and elongation. A stress-rupture test shall also be performed wherein the specimens shall conform to the required values of tensile stress. The specimen shall also conform to the required values of magnetic permeability.
SCOPE
1.1 This specification covers iron-base, heat-resisting alloy castings of the 25 % chromium, 12 % nickel class, intended for structural elements, containers, and supports in electric furnaces, petroleum still tube supports, and for similar applications up to 2000°F [1095°C]. The purchaser should inform the manufacturer when the service temperatures are to exceed 1800°F [980°C].
1.2 In the absence of significant proportions of elements other than those prescribed in Section 4, the two types of alloys covered by this specification may in general be distinguished as follows:
1.2.1 Type I—Alloys characterized by relatively low limiting creep stress at temperatures between 1500 and 2000°F [815 and 1095°C], and relatively high ductility at ordinary temperatures after aging for short periods at temperatures between 1300 and 1500°F [705 and 815°C].
1.2.2 Type II—Alloys having relatively high limiting creep stress but which may develop low ductility at ordinary temperatures when aged for short periods at temperatures between 1350 and 1500°F [730 and 815°C].
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.
1.3.1 Within the text, the SI units are shown in brackets.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.
General Information
Relations
Buy Standard
Standards Content (Sample)
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
Designation: A447/A447M – 10
Standard Specification for
Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class),
1
for High-Temperature Service
This standard is issued under the fixed designationA447/A447M; 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.
1. Scope* priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use.
1.1 This specification covers iron-base, heat-resisting alloy
castings of the 25 % chromium, 12 % nickel class, intended for
2. Referenced Documents
structural elements, containers, and supports in electric fur-
2
2.1 ASTM Standards:
naces, petroleum still tube supports, and for similar applica-
A781/A781M Specification for Castings, Steel and Alloy,
tions up to 2000°F [1095°C]. The purchaser should inform the
Common Requirements, for General Industrial Use
manufacturer when the service temperatures are to exceed
A800/A800M Practice for Steel Casting, Austenitic Alloy,
1800°F [980°C].
Estimating Ferrite Content Thereof
1.2 In the absence of significant proportions of elements
E8 Test Methods for Tension Testing of Metallic Materials
otherthanthoseprescribedinSection4,thetwotypesofalloys
E21 Test Methods for Elevated Temperature Tension Tests
coveredbythisspecificationmayingeneralbedistinguishedas
of Metallic Materials
follows:
1.2.1 Type I—Alloys characterized by relatively low limit-
3. General Conditions for Delivery
ingcreepstressattemperaturesbetween1500and2000°F[815
3.1 Material furnished to this specification shall conform to
and 1095°C], and relatively high ductility at ordinary tempera-
the requirements of SpecificationA781/A781M, including any
tures after aging for short periods at temperatures between
supplementary requirements that are indicated in the purchase
1300 and 1500°F [705 and 815°C].
order. Failure to comply with the general requirements of
1.2.2 Type II—Alloys having relatively high limiting creep
Specification A781/A781M constitutes nonconformance with
stress but which may develop low ductility at ordinary tem-
this specification. In case of conflict between the requirements
peratures when aged for short periods at temperatures between
of this specification and Specification A781/A781M, this
1350 and 1500°F [730 and 815°C].
specification shall prevail.
1.3 The values stated in either SI units or inch-pound units
are to be regarded separately as standard. The values stated in
4. Process
each system may not be exact equivalents; therefore, each
4.1 The alloy for the castings shall be made by the electric-
system shall be used independently of the other. Combining
furnace process or by any other process approved by the
values from the two systems may result in non-conformance
purchaser.
with the standard.
1.3.1 Within the text, the SI units are shown in brackets.
5. Heat Treatment
1.4 This standard does not purport to address all of the
5.1 Except as otherwise agreed upon between the manufac-
safety concerns, if any, associated with its use. It is the
turer and the purchaser, the manufacturer shall not be required
responsibility of the user of this standard to establish appro-
to heat treat the castings.
1
This specification is under the jurisdiction of ASTM Committee A01 on Steel,
Stainless Steel and Related Alloys and is the direct responsibility of Subcommittee
2
A01.18 on Castings. For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Current edition approved Oct. 1, 2010. Published November 2010. Originally contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
approved in 1944. Redesignated asA447 in 1961. Last previous edition approved in Standards volume information, refer to the standard’s Document Summary page on
2007 as A447/A447M – 93 (2007). DOI: 10.1520/A0447_A0447M-10. the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
A447/A447M – 10
6. Chemical Composition
6.1 The castings shall conform to the requirements of Table
1 as to chemical composition.
7. Sampling
7.1 MaterialforthetestsspecifiedinSections10,12,and13
may be taken from separately cast test blocks of a form such as
that shown in Fig. 1, from another type of test block, from the
castings, or from coupons attached to the castings, as may be
agreed upon between the manufacturer and the purchaser.
7.2 Material for the magnetic permeability test specimen
(Section 11) may be taken, prior to heat treatment, from th
...
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:A447/A447M–93 (Reapproved 2007) Designation: A447/A447M – 10
Standard Specification for
Steel Castings, Chromium-Nickel-Iron Alloy (25-12 Class),
1
for High-Temperature Service
This standard is issued under the fixed designationA447/A447M; 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.
1. Scope*
1.1 This specification covers iron-base, heat-resisting alloy castings of the 25 % chromium, 12 % nickel class, intended for
structural elements, containers, and supports in electric furnaces, petroleum still tube supports, and for similar applications up to
2000°F [1095°C]. The purchaser should inform the manufacturer when the service temperatures are to exceed 1800°F [980°C].
1.2 IntheabsenceofsignificantproportionsofelementsotherthanthoseprescribedinSection4,thetwotypesofalloyscovered
by this specification may in general be distinguished as follows:
1.2.1 Type I—Alloys characterized by relatively low limiting creep stress at temperatures between 1500 and 2000°F [815 and
1095°C], and relatively high ductility at ordinary temperatures after aging for short periods at temperatures between 1300 and
1500°F [705 and 815°C].
1.2.2 Type II—Alloys having relatively high limiting creep stress but which may develop low ductility at ordinary temperatures
when aged for short periods at temperatures between 1350 and 1500°F [730 and 815°C].
1.3The 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.
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.
1.3.1 Within the text, the SI units are shown in brackets.
1.4 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility
of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory
limitations prior to use.
2. Referenced Documents
2
2.1 ASTM Standards:
A781/A781M Specification for Castings, Steel and Alloy, Common Requirements, for General Industrial Use
A800/A800M Practice for Steel Casting, Austenitic Alloy, Estimating Ferrite Content Thereof
E8 Test Methods for Tension Testing of Metallic Materials
E21 Test Methods for Elevated Temperature Tension Tests of Metallic Materials
3. General Conditions for Delivery
3.1 Material furnished to this specification shall conform to the requirements of Specification A781/A781M, including any
supplementary requirements that are indicated in the purchase order. Failure to comply with the general requirements of
SpecificationA781/A781Mconstitutesnonconformancewiththisspecification.Incaseofconflictbetweentherequirementsofthis
specification and Specification A781/A781M, this specification shall prevail.
4. Process
4.1 The alloy for the castings shall be made by the electric-furnace process or by any other process approved by the purchaser.
1
This specification is under the jurisdiction ofASTM CommitteeA01 on Steel, Stainless Steel and RelatedAlloys and is the direct responsibility of SubcommitteeA01.18
on Castings.
Current edition approved Nov.Oct. 1, 2007.2010. Published December 2007.November 2010. Originally approved in 1944. Redesignated asA447 in 1961. Last previous
edition approved in 20032007 as A447/A447M – 93 (20037). DOI: 10.1520/A0447_A0447M-93R07.10.1520/A0447_A0447M-10.
2
For referencedASTM standards, visit theASTM website, www.astm.org, or contactASTM Customer Service at service@astm.org. For Annual Book ofASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
*A Summary of Changes section appears at the end of this standard.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
1
---------------------- Page: 1 ----------------------
A447/A
...
Questions, Comments and Discussion
Ask us and Technical Secretary will try to provide an answer. You can facilitate discussion about the standard in here.