ASTM A476/A476M-00(2022)

Standard Specification for Ductile Iron Castings for Paper Mill Dryer Rolls

ABSTRACT
This specification covers ductile iron castings for use in pressure containing paper mill dryer rolls. The castings shall be stress relieved through heat treatment and shall undergo chemical analysis and conform to the required chemical composition in total carbon, silicon, phosphorus, and sulfur. Tension test specimens shall be obtained from test coupons poured from the same iron as the castings represented and shall conform to the prescribed mechanical properties such as yield strength, tensile strength, and elongation. Hardness test shall be conducted on the material and shall meet the required Brinell hardness value.
SCOPE
1.1 This specification covers ductile iron castings for use in pressure-containing paper mill dryer rolls at temperatures up to 450 °F [230 °C].  
1.2 No precise quantitative relationship can be stated between the properties of the iron in various locations of the same casting or between the properties of a casting and those of a test specimen cast from the same iron (see Appendix X1).  
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 nonconformance with the standard.  
1.3.1 Exception—Within the text, the SI units are shown in brackets.  
1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.

General Information

• Status: Published
• Publication Date: 30-Sep-2022
• ICS: 77.140.80 - Iron and steel castings
• Technical Committee: A04 - Iron Castings
• Drafting Committee: A04.02 - Malleable and Ductile Iron Castings

Standards Content (Sample)

This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the
Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.
Designation: A476/A476M −00 (Reapproved 2022)
Standard Specification for
1,2
Ductile Iron Castings for Paper Mill Dryer Rolls
This standard is issued under the fixed designationA476/A476M; 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 E446 Reference Radiographs for Steel Castings Up to 2 in.
(50.8 mm) in Thickness
1.1 This specification covers ductile iron castings for use in
pressure-containing paper mill dryer rolls at temperatures up to
3. Terminology
450 °F [230 °C].
3.1 Definitions for many terms common to iron castings are
1.2 No precise quantitative relationship can be stated be-
found in Terminology A644.
tweenthepropertiesoftheironinvariouslocationsofthesame
castingorbetweenthepropertiesofacastingandthoseofatest
4. Ordering Information
specimen cast from the same iron (see Appendix X1).
4.1 Ordersformaterialpurchasedtotherequirementsofthis
1.3 The values stated in either SI units or inch-pound units
specification should include the following information:
are to be regarded separately as standard. The values stated in
4.1.1 Quantity,
each system may not be exact equivalents; therefore, each
4.1.2 Specification number and date of issue,
system shall be used independently of the other. Combining
4.1.3 Description of casting by pattern number or drawing,
values from the two systems may result in nonconformance
4.1.4 Heat treatment, if required (see 5.1),
with the standard.
4.1.5 Type of test coupon (see 9.2),
1.3.1 Exception—Within the text, the SI units are shown in
4.1.6 Certification, if required (see 13.1),
brackets.
4.1.7 Marking location (see 14.1), and
1.4 This international standard was developed in accor-
4.1.8 Additional requirements.
dance with internationally recognized principles on standard-
ization established in the Decision on Principles for the
5. Heat Treatment
Development of International Standards, Guides and Recom-
mendations issued by the World Trade Organization Technical 5.1 The castings may be stress relieved at a temperature not
Barriers to Trade (TBT) Committee. to exceed 1200 °F [650 °C].
2. Referenced Documents
6. Chemical Requirements
3
2.1 ASTM Standards:
6.1 The castings shall conform to the following chemical
A644 Terminology Relating to Iron Castings
requirements:
E8/E8M Test Methods for Tension Testing of Metallic Ma-
Total carbon, min, % 3.0
terials
Silicon, max, % 3.0
Phosphorus, max, % 0.08
E10 Test Method for Brinell Hardness of Metallic Materials
Sulfur, max, % 0.05
E94/E94M Guide for Radiographic Examination Using In-
6.2 The castings shall have a carbon equivalent of 3.8 to 4.5
dustrial Radiographic Film
inclusive.
NOTE 1—The carbon content equivalent is calculated as follows:
1
Total carbon + 0.3 (silicon + phosphorus)
This specification is under the jurisdiction of ASTM Committee A04 on Iron
Castings and is the direct responsibility of Subcommittee A04.02 on Malleable and
6.3 The chemical analysis for total carbon shall be made on
Ductile Iron Castings.
either chilled cast pencil-type specimens or on thin wafers
Current edition approved Oct. 1, 2022. Published October 2022. Originally
1
approved in 1962. Last previous edition approved in 2018 as A476/A476M – 00
approximately ⁄32 in. [0.8 mm] thick, cut from test coupons.
(2018). DOI: 10.1520/A0476_A0476M-00R22.
Drillings shall not be used due to attendant loss of graphite.
2
For ASME Boiler and Pressure Vessel Code Applications, see related Specifi-
cations SA-467 in Section II of that Code.
3
For referenced ASTM standards, visit the ASTM website, www.astm.org, or 7. Mechanical Properties
contact ASTM Customer Service at [e-mail]. For Annual Book of ASTM
7.1 The iron represented by test coupons shall conform to
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website. tensile requirements prescribed in Table 1.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
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A476/A476M − 00 (2022)
TABLE 1 Tensile Requirements
Test Coupon Section Thickness 1 in. [25 mm] 3 in. [75 mm]
Tensile strength, min, ksi [MPa] 80 [555] 80 [555]
Yield strength, min, ksi [MPa] 60 [415] 60 [415]
Elongation in 2 in. [50 mm], min, % 3.0 [3.0] 1.0 [1.0]
7.2 The yield strength prescribed in Table 1 may be deter-
mined by any of the approved procedures described in 7.3 of
Test Methods E8/E8M.
7.3 The Brinel
...