ASTM B618/B618M-18e1

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.
´1
Designation: B618/B618M −18
Standard Specification for
Aluminum-Alloy Investment Castings
This standard is issued under the fixed designation B618/B618M; the number immediately following the designation indicates the year
of original adoption or, in the case of revision, the year of last revision.Anumber 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 U.S. Department of Defense.
ε NOTE—Footnote C of Table 3 was revised editorially in August 2018.
1. Scope* 2. Referenced Documents
1.1 This specification covers aluminum-alloy investment
2.1 The following documents of the issue in effect on the
castings designated as shown in Table 1.
date of purchase form a part of this specification to the extent
referenced herein:
1.2 This specification is for aluminum-alloy investment
castings used in general purpose applications. It may not
2.2 ASTM Standards:
address the mechanical properties integrity testing and verifi-
B179Specification for Aluminum Alloys in Ingot and Mol-
cationrequiredforhighlyloadedorsafetycriticalapplications.
ten Forms for Castings from All Casting Processes
1.3 Alloy and temper designations are in accordance with B275PracticeforCodificationofCertainZinc,TinandLead
Die Castings (Withdrawn 2020)
ANSI H35.1/H35.1(M).
B557Test Methods for Tension Testing Wrought and Cast
1.4 Unless the order specifies the “M” specification
Aluminum- and Magnesium-Alloy Products
designation, the material shall be furnished to the inch-pound
B557MTest Methods forTensionTestingWrought and Cast
units.
Aluminum- and Magnesium-Alloy Products (Metric)
1.5 For acceptance criteria for inclusion of new aluminum
B660Practices for Packaging/Packing of Aluminum and
and aluminum alloys and their properties in this specification,
Magnesium Products
see Annex A1 and Annex A2.
B666/B666MPractice for Identification Marking of Alumi-
num and Magnesium Products
1.6 Units—The values stated in either SI units or inch-
B881Terminology Relating toAluminum- and Magnesium-
pound units are to be regarded separately as standard. The
Alloy Products
values stated in each system may not be exact equivalents;
B917/B917MPractice for Heat Treatment of Aluminum-
therefore,eachsystemshallbeusedindependentlyoftheother.
Alloy Castings From All Processes
Combining values from the two systems may result in noncon-
B985Practice for SamplingAluminum Ingots, Billets, Cast-
formance with the standard.
ings and Finished or Semi-Finished Wrought Aluminum
1.7 This standard does not purport to address all of the
Products for Compositional Analysis
safety concerns, if any, associated with its use. It is the
D3951Practice for Commercial Packaging
responsibility of the user of this standard to establish appro-
E29Practice for Using Significant Digits in Test Data to
priate safety, health, and environmental practices and deter-
Determine Conformance with Specifications
mine the applicability of regulatory limitations prior to use.
E34Test Methods for Chemical Analysis of Aluminum and
1.8 This international standard was developed in accor-
Aluminum-Base Alloys (Withdrawn 2017)
dance with internationally recognized principles on standard-
E94Guide for Radiographic Examination Using Industrial
ization established in the Decision on Principles for the
Radiographic Film
Development of International Standards, Guides and Recom-
E155Reference Radiographs for Inspection of Aluminum
mendations issued by the World Trade Organization Technical
and Magnesium Castings
Barriers to Trade (TBT) Committee.
1 2
This specification is under the jurisdiction ofASTM Committee B07 on Light For referenced ASTM standards, visit the ASTM website, www.astm.org, or
Metals and Alloys and is the direct responsibility of Subcommittee B07.01 on contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
Aluminum Alloy Ingots and Castings. Standards volume information, refer to the standard’s Document Summary page on
Current edition approved May 15, 2018. Published May 2018. Originally the ASTM website.
approved in 1977. Last previous edition approved in 2014 as B618/B618M–14. The last approved version of this historical standard is referenced on
DOI: 10.1520/B0618_B0618M-18E01. www.astm.org.
*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
B618/B618M − 18
A,B,C,D
TABLE 1 Chemical Composition Requirements
E
Others
Al.
J
Desig Si Fe Cu Mn Mg Cr Ni Zn Ti Ag Be Pb Sn Zr FNs
F
Min.
Each Total
201.0 0.10 0.15 4.0–5.2 0.20–0.50 0.15–0.55 . . . . . . . . . 0.15–0.35 0.40–1.0 . . . . . . . . . . . . . . . . . . 0.05 0.10 Rem.
204.0 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 Rem.
242.0 0.7 1.0 3.5–4.5 0.35 1.2–1.8 0.25 1.7–2.3 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
295.0 0.7–1.5 1.0 4.0–5.0 0.35 0.03 . . . . . . 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
319.0 5.5–6.5 1.0 3.0–4.0 0.50 0.10 . . . 0.35 1.0 0.25 . . . . . . . . . . . . . . . . . . . . . . . . 0.50 Rem.
328.0 7.5–8.5 1.0 1.0–2.0 0.20–0.6 0.20–0.6 0.35 0.25 1.5 0.25 . . . . . . . . . . . . . . . . . . . . . . . . 0.50 Rem.
G G
355.0 4.5–5.5 0.6 1.0–1.5 0.50 0.40–0.6 0.25 . . . 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
C355.0 4.5–5.5 0.20 1.0–1.5 0.10 0.40–0.6 . . . . . . 0.10 0.20 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
G G
356.0 6.5–7.5 0.6 0.25 0.35 0.20–0.45 . . . . . . 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
A356.0 6.5–7.5 0.20 0.20 0.10 0.25–0.45 . . . . . . 0.10 0.20 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
A443.0 4.5–6.0 0.8 0.30 0.50 0.05 0.25 . . . 0.50 0.25 . . . . . . . . . . . . . . . . . . . . . . . . 0.35 Rem.
B443.0 4.5–6.0 0.8 0.15 0.35 0.05 . . . . . . 0.35 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
514.0 0.35 0.50 0.15 0.35 3.5–4.5 . . . . . . 0.15 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
520.0 0.25 0.30 0.25 0.15 9.5–10.6 . . . . . . 0.15 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
535.0 0.15 0.15 0.05 0.10–0.25 6.2–7.5 . . . . . . . . . 0.10–0.25 . . . 0.003–0.007 . . . . . . . . . 0.005B . . . 0.05 0.15 Rem.
705.0 0.20 0.8 0.20 0.40–0.6 1.4–1.8 0.20–0.40 . . . 2.7–3.3 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
707.0 0.20 0.8 0.20 0.40–0.6 1.8–2.4 0.20–0.40 . . . 4.0–4.5 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
I
710.0 0.15 0.50 0.35–0.6 0.05 0.6–0.8 . . . . . . 6.0–7.0 0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
I H
712.0 0.30 0.50 0.25 0.10 0.50–0.65 0.40–0.6 . . . 5.0–6.5 0.15–0.25 . . . . . . . . . . . . . . . . . . . . . 0.05 0.20 Rem.
713.0 0.25 1.1 0.40–1.0 0.6 0.20–0.50 0.35 0.15 7.0–8.0 0.25 . . . . . . . . . . . . . . . . . . . . . 0.10 0.25 Rem.
771.0 0.15 0.15 0.10 0.10 0.8–1.0 0.06–0.20 . . . 6.5–7.5 0.10–0.20 . . . . . . . . . . . . . . . . . . . . . 0.05 0.15 Rem.
850.0 0.7 0.7 0.7–1.3 0.10 0.10 . . . 0.7–1.3 . . . 0.20 . . . . . . . . . 5.5–7.0 . . . . . . . . . . . . 0.30 Rem.
I
851.0 2.0–3.0 0.7 0.7–1.3 0.10 0.10 . . . 0.3–0.7 . . . 0.20 . . . . . . . . . 5.5–7.0 . . . . . . . . . . . . 0.30 Rem.
I
852.0 0.40 0.7 1.7–2.3 0.10 0.6–0.9 . . . 0.9–1.5 . . . 0.20 . . . . . . . . . 5.5–7.0 . . . . . . . . . . . . 0.30 Rem.
A
When single units are shown, they indicate the maximum amounts permitted.
B
Analysis shall be made for the elements for which limits are shown in this table.
C
The following applies to all specified limits in this table: For purposes of determining conformance to these limits, an observed value or a calculated value obtained from analysis shall be rounded to the nearest unit
in the last right-hand place of figures used in expressing the specified limit in accordance with the rounding-off method of Practice E29.
D
In case of discrepancy between the values listed in Table 1 and those listed in the “Designations and Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (known as the ‘Pink Sheets’),” the
composition limits registered with the Aluminum Association and published in the “Pink Sheets” shall be considered the controlling composition.
E
“Others” includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in the specification. However, such analysis
is not required and may not cover all metallic “Others” elements. Should any analysis by the producer or the purchaser establish that an “Others” element exceeds the limit of “Each” or that the aggregate of several “Others”
elements exceeds the limit of “Total,” the material shall be considered nonconforming.
F
Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.
G
If iron exceeds 0.45 %, manganese content shall not be less than one half of the iron content.
H
The Aluminum Association ruling on the number of decimal places to which Mg percent is expressed is exempted for some long standing alloys. See A2.2.6.
I
710.0 formerly A712.0, 712.0 formerly D712.0, 851.0 formerly A850.0, 852.0 formerly B850.0.
J
For a cross reference of current and former alloy designations see the Aluminum Association’s “Designations and Chemical Composition Limits for Aluminum Alloys in the Form of Castings and Ingot (The Pink Sheets).”

´1
B618/B618M − 18
E165Practice for Liquid Penetrant Testing for General after which the pattern is removed through the use of heat, and
Industry thenfillingtheresultingcavitywithmoltenmetalandallowing
E607 Test Method for Atomic Emission Spectrometric it to solidify.
Analysis Aluminum Alloys by the Point to Plane Tech-
nique Nitrogen Atmosphere (Withdrawn 2011)
4. Ordering Information
E716Practices for Sampling and Sample Preparation of
4.1 Ordersformaterialunderthisspecificationshallinclude
Aluminum and Aluminum Alloys for Determination of
the following information (1.4 and 1.6):
Chemical Composition by Spark Atomic Emission Spec-
4.1.1 This specification designation (which includes the
trometry
number, the year, and the revision letter, if applicable),
E1251Test Method for Analysis of Aluminum and Alumi-
NOTE 1—For inch-pound application, specify Specification B618 and
num Alloys by Spark Atomic Emission Spectrometry
for metric application specify Specification B618M. Do not mix units.
E2422Digital Reference Images for Inspection of Alumi-
4.1.2 Alloy (Section 7 and Table 1),
num Castings
4.1.3 Temper (Section 10 and Table 2 [Table 3]),
IEEE/ASTM SI 10Standard for Use of the International
System of Units (SI): The Modern Metric System 4.1.4 Applicable drawing or part number, and
4.1.5 The quantity in either pieces or pounds [kilograms].
2.3 ANSI Standard:
H35.1/H35.1 (M)-2006American National Standard Alloy
4.2 Additionally, orders for material to this specification
and Temper Designation Systems for Aluminum
shall include the following information when required by the
purchaser:
2.4 Military Standards:
4.2.1 Whether chemical analysis and tensile property re-
MIL-STD-129Marking for Shipment and Storage
ports are required (Table 1 and Table 2 [Table 3]),
MIL-STD-276Impregnation of Porous Nonferrous Metal
4.2.2 Whether castings, test specimens, or both may be
Castings
supplied in the artificially aged − T5 temper for alloys 705.0,
2.5 Federal Standard:
707.0, 712.0, and 713.0 (10.2),
Fed. Std. No. 123Marking for Shipment (Civil Agencies)
4.2.3 Whether test specimens cut from castings are required
2.6 AMS Standard:
in addition to or instead of separately cast specimens (10.3 and
AMS 2771Heat Treatment of Aluminum Alloy Castings
11.2),
2.7 NAVSEA Standard:
4.2.4 Whether heat treatment is to be performed in accor-
S9074-AR-GIB-010/278 Requirements for Fabrication
dance with AMS 2771 (Section 15),
Welding and Inspection, and Casting Inspection and
4.2.5 Whether repairs are permissible (16.1),
Repair for Machinery, Piping, and Pressure Vessels
4.2.6 Whether inspection is required at the producer’s
2.8 Aluminum Association Standard:
works (18.1),
Designations and Chemical Composition Limits forAlumi-
4.2.7 Whether surface requirements shall be checked
num Alloys in the Form of Castings and Ingot (The Pink
against observational standards where such standards are
Sheets)
established (19.1),
2.9 Other Standards: 4.2.8 Whetherliquidpenetrantinspectionisrequired(19.3),
4.2.9 Whetherradiographicinspectionisrequiredand,ifso,
CEN EN 14242 Aluminum and Aluminum Alloys—
Chemical Analysis—Inductively Coupled Plasma Optical the radiographic grade of casting required (19.4 and Table 4),
4.2.10 Whether certification is required (21.1),
Emission Spectral Analysis
4.2.11 Whether foundry control is required (Section 9),
3. Terminology
4.2.12 WhetherPracticesB660applyand,ifso,thelevelsof
preservation, packaging, and packing required (24.4), and
3.1 Definitions—Refer to Terminology B881 for definitions
4.2.13 Whether marking in accordance with
of product terms used in this specification.
Fed.Std.No.123, Practice D3951, or MIL-STD129 applies
3.2 Definitions of Terms Specific to This Standard:
(24.4).
3.2.1 investment casting, n—a metal object produced by
surrounding (investing) an expendable pattern (usually wax or
5. Responsibility for Quality Assurance
plastic) with a refractory slurry that sets at room temperature,
5.1 Responsibility for Inspection and Tests—Unless other-
wise specified in the contract or purchase order, the producer
4 shall be responsible for the performance of all inspection and
Available from Aluminum Association, Inc., 1400 Crystal Drive Suite 430
Arlington, VA 22202, http://www.aluminum.org.
test requirements specified herein. Except as otherwise speci-
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4,
fied in the contract or order, the producer may use his own or
Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://
any other suitable facilities for the performance of the inspec-
www.dodssp.daps.mil.
tion and test requirements specified herein, unless disapproved
Available from Society of Automotive Engineers (SAE), 400 Commonwealth
Dr., Warrendale, PA 15096-0001, http://www.sae.org.
by the purchaser.The purchaser shall have the right to perform
Available from Naval Sea Systems Command (NAVSEA), 1333 Isaac Hull
any of the inspections and tests set forth in this specification
Ave., SE, Washington, DC 20376, http://www.navsea.navy.mil.
where such inspections are deemed necessary to confirm that
Available from European Committee for Standardization (CEN), 36 Rue de
Stassart, B-1050, Brussels, Belgium, http://www.cenorm.be. material conforms to prescribed requirements.
´1
B618/B618M − 18
A,B
TABLE 2 Tensile Requirements (Inch-Pound Units)
Elongation in
Typical
Tensile Yield Strength
2 in. or 4×
E C Brinell
Designation Temper Strength, (0.2 % offset)
D
diameter,
Hardness,
min, ksi min, ksi
500 kgf, 10 mm
min, %
201.0 T6 60.0 50.0 5.0 . . .
T7 60.0 50.0 3.0 . . .
204.0 T4 45.0 28.0 6.0 . . .
FF
T6 30.0 115
G FF
242.0 O 23.0 70
F
T61 32.0 20.0 105
295.0 T4 29.0 13.0 6.0 60
T6 32.0 20.0 3.0 75
F
T62 36.0 28.0 95
T7 29.0 16.0 3.0 70
319.0 F 23.0 13.0 1.5 70
T6 31.0 20.0 1.5 80
328.0 F 25.0 14.0 1.0 60
T6 34.0 21.0 1.0 80
355.0 T6 32.0 20.0 2.0 80
F
T51 25.0 18.0 65
F
T71 30.0 22.0 75
C355.0 T6 36.0 25.0 2.5 . . .
F
356.0 F 19.0 2.0 55
T6 30.0 20.0 3.0 70
FF
T7 31.0 75
F
T51 23.0 16.0 60
T71 25.0 18.0 3.0 60
A356.0 T6 34.0 24.0 3.5 80
443.0 F 17.0 7.0 3.0 40
B443.0 F 17.0 6.0 3.0 40
514.0 F 22.0 9.0 6.0 50
520.0 T4 42.0 22.0 12.0 75
535.0 F 35.0 18.0 9.0 70
H I J
705.0 T1 and T5 30.0 17.0 5.0 65
H J
707.0 T1 33.0 22.0 2.0 85
J
T7 37.0 30.0 1.0 80
K H
710.0 T1 32.0 20.0 2.0 75
K H I J
712.0 T1 and T5 34.0 25.0 4.0 75
H I
713.0 T1 and T5 32.0 22.0 3.0 75
771.0 T5 42.0 38.0 1.5 100
T51 32.0 27.0 3.0 85
T52 36.0 30.0 1.5 85
T6 42.0 35.0 5.0 90
T71 48.0 45.0 2.0 120
F
850.0 T5 16.0 5.0 45
K F
851.0 T5 17.0 3.0 45
K F
852.0 T5 24.0 18.0 60
A
If agreed upon by the producer and the purchaser, other mechanical properties may be obtained by other heat treatments such as annealing, aging, or stress relieving.
B
For purposes of determining conformance with this specification, each value for tensile strength and yield strength shall be rounded to the nearest 0.1 ksi and each value
for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding method of Practice E29.
C
Refer to ANSI H35.1/H35.1 (M) for description of tempers.
D
For information only, not required for acceptance.
E
ASTM alloy designations are in Practice B275.
F
Not required.
G
Formerly designated 222.0-T2 and 242.0-T21.
H
Aged 21 days at room temperature.
I
Artificially aged in accordance with Practice B917/B917M.
J
Yield strength to be determined only when specified in the contract or purchase order.
K
710.0 formerly A712.0, 712.0 formerly D712.0, 851.0, formerly A850.0, 852.0 formerly B850.0.
6. Materials and Manufacture 6.1.1 Unless otherwise specified, only aluminum alloy con-
forming to the requirements of Specification B179 or produc-
6.1 Theresponsibilityoffurnishingcastingsthatcanbelaid
er’s foundry scrap (identified as being made from alloy
out and machined to the finished dimensions within the
conforming to Specification B179) shall be used in the remelt-
permissible variations specified, as shown on the blueprints or
ing furnace from which molten metal is taken for pouring
drawings, shall rest with the producer, except where pattern
equipment is furnished by the purchaser.
´1
B618/B618M − 18
A,B,C
TABLE 3 Tensile Requirements (SI Units) [Metric]
Typical
Yield Strength
Tensile Strength, Elongation in
Brinell
G D
Designation Temper (0.2 % offset)
E
F
min, MPa 5D, min, % Hardness,
min, MPa
500 kgf, 10 mm
201.0 T6 415 345 4.0 . . .
T7 415 345 3.0 . . .
204.0 T4 310 195 5.0 . . .
HH
T6 205 115
I HH
242.0 O 160 70
H
T61 220 140 105
295.0 T4 200 90 5.0 60
T6 220 140 3.0 75
H
T62 250 195 95
T7 200 110 3.0 70
319.0 F 160 90 1.5 70
T6 215 140 1.5 80
328.0 F 170 95 1.0 60
T6 235 145 1.0 80
355.0 T6 220 140 2.0 80
H
T51 170 125 65
H
T71 205 150 75
C355.0 T6 250 170 2.5 . . .
H
356.0 F 130 2.0 55
T6 205 140 3.0 70
HH
T7 215 75
H
T51 160 110 60
T71 170 125 3.0 60
A356.0 T6 235 165 3.5 80
443.0 F 115 50 3.0 40
B443.0 F 115 40 3.0 40
514.0 F 150 60 5.0 50
520.0 T4 290 150 10.0 75
535.0 F 240 125 8.0 70
J K L
705.0 T1 and T5 205 115 4.0 65
J L
707.0 T1 230 150 2.0 85
L
T7 255 205 1.0 80
M J
710.0 T1 220 140 2.0 75
M J K L
712.0 T1 and T5 235 170 4.0 75
J K
713.0 T1 and T5 220 150 3.0 75
771.0 T5 290 260 1.5 100
T51 220 185 3.0 85
T52 250 205 1.5 85
T6 290 240 5.0 90
T71 330 310 2.0 120
H
850.0 T5 110 4.0 45
M H
851.0 T5 115 3.0 45
M H
852.0 T5 165 125 60
A
If agreed upon by the producer and the purchaser, other mechanical properties may be obtained by other heat treatments such as annealing, aging, or stress relieving.
B
Guidelines for metric conversion from the “Tempers for Aluminum and Aluminum Alloys, Metric Edition” (Tan Sheets) Appendix A, were used to convert the tensile and
yield values to SI units.
C
For purposes of determining conformance with this specification, each value for tensile strength and yield strength shall be rounded to the nearest 1 MPa and each value
for elongation shall be rounded to the nearest 0.5 %, both in accordance with the rounding method of Practice E29.
D
Refer to ANSI H35.1/H35.1 (M)-2006 for description of tempers.
E
For explanation of SI unit ” Mpa” see Appendix X2.
F
For information only, not required for acceptance.
G
ASTM alloy designations are in Practice B275.
H
Not required.
I
Formerly designated 222.0-T2 and 242.0-T21.
J
Aged 21 days at room temperature.
K
Artificially aged in accordance with Practice B917/B917M.
L
Yield strength to be determined only when specified in the contract or purchase order.
M
710.0 formerly A712.0, 712.0 formerly D712.0, 851.0, formerly A850.0, 852.0 formerly B850.0.
directly into castings.Additions of small amounts of modifiers 7. Chemical Composition
and grain refining elements or alloys are permitted.
7.1 The product shall conform to the chemical composition
6.1.2 Pure materials, recycled materials, and master alloys
limits prescribed in Table 1. Conformance shall be determined
may be used to make alloys conforming to this specification, by the producer by taking samples at the time castings are
provided chemical analysis can be taken and adjusted to
poured in accordance with Practices E716 and analyzed in
conform to Table 1 prior to pouring any castings. accordance with Test Methods E34, E607,or E1251,or
´1
B618/B618M − 18
TABLE 4 Discontinuity-Level Requirements for Aluminum Castings in Accordance with Film Reference Radiographs E155 or Digital
Reference Radiographs E2422
Grade A Grade B Grade C Grade D
Discontinuity Radiograph Section Thickness, in.
1 3 1 3 1 3 1 3
⁄4 ⁄4 ⁄4 ⁄4 ⁄4 ⁄4 ⁄4 ⁄4
Gas holes 1.1 none 1 1 2 2 5 5
Gas porosity (round) 1.21 none 1 1 3 3 7 7
Gas porosity (elongated) 1.22 none 1 1 3 4 5 5
A A
Shrinkage cavity 2.1 none 1 1 2 3
Shrinkage porosity or sponge 2.2 none 1 1 2 2 4 3
Foreign material (less dense material) 3.11 none 1 1 2 2 4 4
Foreign material (more dense material) 3.12 none 1 1 2 1 4 3
Segregation 3.2 none none none none
Cracks . none none none none
Cold shuts . none none none none
Surface irregularity . not to exceed drawing tolerance
Core shift . not to exceed drawing tolerance
A
Not available. Use ⁄4-in. [6-mm] for all section thicknesses.
EN14242 (ICP method). If the producer has determined the ties until the gating, pouring, and other foundry practices have
composition of the material during casting, they shall not be been established to produce castings meeting the quality
required to sample and analyze the finished product. standards furnished by the purchaser or agreed upon between
7.1.1 Asample for the determination of chemical composi- the purchaser and the producer. When foundry practices have
tion shall be taken to represent the following: been so established, the production method shall not be
7.1.1.1 Not more than 500 lb [225 kg] of clean castings significantly changed without demonstrating to the satisfaction
(gates and risers removed) or a single casting poured from one of the purchaser that the change does not adversely affect the
furnace and using only one melt charge. quality of the castings. Minor changes in pouring temperature
7.1.1.2 Castings poured continuously from one furnace for of 650°F [628°C] from the established nominal temperature
not more than eight consecutive hours from a single master are permissible.
heat. A master heat is defined as all the metal of a single
10. Tensile Requirements
furnace charge without subsequent additions after chemical
10.1 Theseparatelycasttensiontestspecimensrepresenting
composition has been determined.
the castings shall meet the mechanical properties prescribed in
7.2 If it becomes necessary to analyze castings for confor-
Table 2.
mance to chemical composition limits, the method used to
10.2 Although alloys 705.0, 707.0, 712.0, and 713.0 are
sample castings for the determination of chemical composition
most frequently used in the T1 naturally aged temper, by
shall be in accordance with Practice B985. Analysis shall be
agreement of the producer and purchaser, the castings may be
performed in accordance with Practices E716, Test Methods
supplied in the T5 artificially aged temper. The producer and
E34, E607,or E1251, or EN14242 (ICP method).
thepurchasermayalsoagreetobasetheacceptanceofcastings
8. Material Requirements—Castings Produced for
on artificially aged test bars. The conditions of artificial aging
Governmental and Military Agencies
showninPracticeB917/B917Mshallbeemployedunlessother
conditions are accepted by mutual consent.
8.1 Unless otherwise specified, only aluminum alloy con-
forming to the requirements of Specification B179 or produc-
10.3 Whenspecified,thetensilestrength,yieldstrength,and
er’s foundry scrap (identified as being made from alloy
elongation values of specimens cut from castings shall be not
conforming to Specification B179) shall be used in the remelt-
less than 75% of the tensile and yield strength values and not
ing furnace from which molten metal is taken for pouring
less than 25% of the elongation values specified in Table 2
directly into castings.Additions of small amounts of modifiers
[Table 3]. The measurement of elongation is not required for
and grain refining elements or alloys are permitted.
test specimens cut from castings if 25 % of the specified
8.1.1 Pure materials, recycled materials, and master alloys
minimum elongation value published in Table 2 is 0.5 % or
may be used to make alloys conforming to this specification,
less. If grade D quality castings as described in Table 4 are
provided chemical analysis can be performed and the compo-
specified, no tensile tests shall be specified nor tensile require-
sition of the melt adjusted to conform to Table 1 prior to
ments be met on specimens cut from castings.
pouring any castings.
11. Test Specimens
9. Foundry Control—Castings Produced for
11.1 The tension test specimens shall be cast to size in
Governmental or Military Agencies, or Both
refractory molds of the same material as used for the castings
9.1 When specified, castings shall be produced under in accordance with the dimensions of the 0.250-in. [6-mm]
foundry control approved by the purchaser. Foundry control diameter specimen shown in Fig. 8 of Test Methods B557
shall consist of examination of castings by radiographic or [B557M]. They shall not be machined prior to test except to
other approved methods for determining internal discontinui- adaptthegripendsinsuchamannerastoassureaxialloading.
´1
B618/B618M − 18
11.2 When properties of castings are to be determined, with the replacement tests and retest provisions of Test
tension test specimens shall be cut from the locations desig- Methods B557 [B557M], and the results of retests shall
nated on the drawing unless otherwise negotiated. If no conform to the requirements as to mechanical properties
locations are designated, one or more specimens shall be taken specified in Table 2 [Table 3].
to include locations having significant var
...