ASTM B108/B108M-12e1
(Specification)Standard Specification for Aluminum-Alloy Permanent Mold Castings
Standard Specification for Aluminum-Alloy Permanent Mold Castings
ABSTRACT
This specification covers aluminum-alloy permanent mold castings. The responsibility of furnishing castings that can be laid out and machined to the finished dimensions within the permissible variations specified shall rest with the producer, except where mold equipment is furnished by the purchaser. Samples for chemical analysis shall be taken by sawing, drilling, or milling the casting or test specimens in such a manner as to be representative of the material. Unless otherwise specified, only aluminum or producers foundry scrap shall be used in the re-melting furnace from which molten metal is taken for pouring directly into castings. Pure materials, recycled materials, and master alloys may be used to make alloys conforming to this specification. Foundry control shall consist of examination of castings by radiographic or other approved methods for determining internal discontinuities until the gating, pouring, and other foundry practices have been established to produce castings meeting the quality standards furnished by the purchaser or agreed upon by the purchaser and the producer. Separately cast test specimens shall be cast in iron molds. If the castings are to be heat treated and separately cast specimens are to be used, the specimens representing such castings shall be heat treated with the castings they represent. If castings are to be heat treated and tests are to be obtained on the castings, the test specimens shall be taken from the castings after heat treatment. One per melt-heat combination shall be tested when tensile properties of castings are to be determined. The finished castings shall be uniform in composition and free of blowholes, cracks, shrinks, and other discontinuities.
SCOPE
1.1 This specification covers aluminum-alloy permanent mold castings designated as shown in Table 1.
1.2 This specification is for aluminum-alloy permanent mold castings used in general purpose applications. It may not address the mechanical properties, integrity testing, and verification required for highly loaded or safety critical applications.
1.3 Alloy and temper designations are in accordance with ANSI H35.1/H35.1(M). The equivalent unified numbering system alloy designations are in accordance with Practice E527.
1.4 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.
1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex A1 and Annex A2.
1.6 Units—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.
1.7 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.
TABLE 1 Chemical Composition LimitsA,B,C Alloy Composition, % ANSID UNSAluminumSiliconIronCopper Manga-
nese Magne-
sium ChromiumNickelZincTitaniumTinOther
ElementsE EachTotalF 204.0 A02040remainder0.200.354.2–5.0 0.100.15–0.35... 0.05 0.100.15–0.300.050.05 0.15 242.0 A02420remainder 0.71.03.5–4.5 0.351.2–1.8 0.25 1.7–2.3 0.350.25...0.050.15 296.0remainder 2.0–3.01.24.0–5.00.350.05 ... 0.35 0.500.25 ......0.35 308.0remainder 5.0–6.01.04.0–5.00.500.10 ... ... 1.00.25 ......0.50 319.0 A03190remainder5.5–6.51.03.0–4.00.500.10 ... 0.35 1.00.25 ......0.50 332.0GA03320 remainder8.5–10.51.22.0–4.00.50 0.50–1.5 ... 0.50 1.0 0.25 ......0.50 333.0 A03330remainder8.0–10.01.03.0–4.00.500.05–0.50 ... 0.50 1.00.25 ......0.50 336.0GA03360 remainder11.0–13.01.2 0.50–1.50.350.7–1.3 ...2.0–3.0 0.350.25 ...0.05... 354.0 A...
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Designation:B108/B108M −12
StandardSpecification for
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Aluminum-Alloy Permanent Mold Castings
This standard is issued under the fixed designation B108/B108M; 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.
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´ NOTE—Section 10.2 was corrected editorially in July 2012.
1. Scope* 2. Referenced Documents
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2.1 The following documents of the issue in effect on the
1.1 This specification covers aluminum-alloy permanent
date of casting purchase form a part of this specification to the
mold castings designated as shown in Table 1.
extent referenced herein:
1.2 This specification is for aluminum-alloy permanent
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2.2 ASTM Standards:
mold castings used in general purpose applications. It may not
B179 Specification for Aluminum Alloys in Ingot and Mol-
address the mechanical properties, integrity testing, and veri-
ten Forms for Castings from All Casting Processes
fication required for highly loaded or safety critical applica-
B275 Practice for Codification of Certain Nonferrous Metals
tions.
and Alloys, Cast and Wrought
B557 Test Methods for Tension Testing Wrought and Cast
1.3 Alloy and temper designations are in accordance with
Aluminum- and Magnesium-Alloy Products
ANSI H35.1/H35.1(M). The equivalent unified numbering
B557M Test Methods for Tension Testing Wrought and Cast
system alloy designations are in accordance with Practice
Aluminum- and Magnesium-Alloy Products (Metric)
E527.
B660 Practices for Packaging/Packing of Aluminum and
1.4 Unless the order specifies the “M” specification
Magnesium Products
designation, the material shall be furnished to the inch-pound
B881 Terminology Relating toAluminum- and Magnesium-
units.
Alloy Products
B917/B917M Practice for Heat Treatment of Aluminum-
1.5 For acceptance criteria for inclusion of new aluminum
Alloy Castings from All Processes
and aluminum alloys and their properties in this specification,
D3951 Practice for Commercial Packaging
see Annex A1 and Annex A2.
E29 Practice for Using Significant Digits in Test Data to
1.6 Units—The values stated in either SI units or inch-
Determine Conformance with Specifications
pound units are to be regarded separately as standard. The
E34 Test Methods for Chemical Analysis of Aluminum and
values stated in each system may not be exact equivalents;
Aluminum-Base Alloys
therefore,eachsystemshallbeusedindependentlyoftheother. E94 Guide for Radiographic Examination
Combining values from the two systems may result in non-
E155 Reference Radiographs for Inspection of Aluminum
conformance with the standard. and Magnesium Castings
E165 Practice for Liquid Penetrant Examination for General
1.7 This standard does not purport to address all of the
Industry
safety concerns, if any, associated with its use. It is the
E527 Practice for Numbering Metals and Alloys in the
responsibility of the user of this standard to establish appro-
Unified Numbering System (UNS)
priate safety and health practices and determine the applica-
E607 Test Method for Atomic Emission Spectrometric
bility of regulatory limitations prior to use.
Analysis Aluminum Alloys by the Point to Plane Tech-
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nique Nitrogen Atmosphere (Withdrawn 2011)
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This specification is under the jurisdiction of ASTM Committee B07 on Light
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Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Aluminum Alloy Ingots and Castings. contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Current edition approved May 1, 2012. Published June 2012. Originally Standards volume information, refer to the standard’s Document Summary page on
approved in 1936. Last previous edition approved in 2011 as B108/B108M – 11. the ASTM website.
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DOI: 10.1520/B0108_B0108M-12. The last approved version of this historical standard is referenced on
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For ASME Boiler and Pressure Code application see related SB-108. www.astm.org.
*A Summary of Changes section appears at the end of this standard
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B108/B108M−12
A,B,C
TABLE 1 Chemical Composition Limits
Alloy Composition, %
Other
Manga- Magne- E
D
Elements
ANSI UNS Aluminum Silicon Iron Copper Chromium Nickel Zinc Titanium Tin
nese sium
F
Each Total
204.0 A02040 remainder 0.20 0.35 4.2–5.0 0.10 0.15–0.35 . 0.05 0.10 0.15–0.30 0.05 0.05 0.15
242.0 A02420 remainder 0.7 1.0 3.5–4.5 0.35 1.2–1.8 0.25 1.7–
...
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