ASTM B403-96

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Designation: B 403 – 96
AMERICAN SOCIETY FOR TESTING AND MATERIALS
100 Barr Harbor Dr., West Conshohocken, PA 19428
Reprinted from the Annual Book of ASTM Standards. Copyright ASTM
Standard Specification for
Magnesium-Alloy Investment Castings
This standard is issued under the fixed designation B 403; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope * 2.3 Federal Standards:
Fed. Std. No. 123 Marking for Shipping (Civil Agencies)
1.1 This specification covers magnesium-alloy investment
Fed. Std. No. 184 Identification Marking of Aluminum,
castings designated as shown in Table 1.
Magnesium, and Titanium
NOTE 1—The values stated in inch-pound units are to be regarded as the
2.1.3 Military Standards:
standard. The SI values in parentheses are for information only.
MIL-STD-129 Marking for Shipment and Storage (Military
1.2 Alloy designations are in accordance with Practices
Agencies)
B 275 and E 527; temper designations are in accordance with
MIL-STD-649 Preparation for Storage and Shipment of
Practice B 296.
Aluminum and Magnesium Products
2. Referenced Documents
3. Ordering Information
2.1 The following documents of the issue in effect on the
3.1 Orders for castings under this specification shall include
date of order acceptance form a part of this specification to the
the following information:
extent referenced herein:
3.1.1 Quantity of each casting,
2.2 ASTM Standards:
3.1.2 Alloy (Section 6 and Table 1),
B 275 Practice for Codification of Certain Nonferrous Met-
3.1.3 Temper (see 5.1 and Table 2),
als and Alloys, Cast and Wrought
3.1.4 Casting drawing giving all necessary dimensions and
B 296 Practice for Temper Designations of Magnesium
showing amount of finish left for machining,
Alloys, Cast and Wrought
3.1.5 Surface treatment (see 10.1),
B 557 Test Methods of Tension Testing Wrought and Cast
3.1.6 Whether certification is required (see 11.1),
Aluminum- and Magnesium-Alloy Products
3.1.7 Whether inspection is required at the manufacturer’s
B 661 Practice for Heat Treatment of Magnesium Alloys
works (see 12.1), and
E 29 Practice for Using Significant Digits in Test Data to
3.1.8 Special inspection requirements (see 12.3).
Determine Conformance with Specifications
4. Materials and Manufacture
E 35 Test Methods for Chemical Analysis of Magnesium
and Magnesium Alloys
4.1 The responsibility for furnishing castings that can be
E 88 Practice for Sampling Nonferrous Metals and Alloys
laid out and machined to the finished dimensions within the
in Cast Form for Determination of Chemical Composition
permissible variations specified, as shown on the drawings,
E 94 Guide for Radiographic Testing
shall rest with the manufacturer, except where mold equipment
E 155 Reference Radiographs for Inspection of Aluminum
is furnished by the purchaser. Sufficient stock shall be allowed
and Magnesium Castings
for shrinkage and, where required, for finishing; but castings of
E 165 Practice for Liquid Penetrant Examination
excessive weight shall not be furnished.
E 527 Practice for Numbering Metals and Alloys (UNS)
5. Treatment
5.1 The castings may be subjected to such heat treatment as
This specification is under the jurisdiction of ASTM Committee B-7 on Light
the manufacturer desires to produce material that will conform
Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on
to the requirements specified. Heat treatment shall be per-
Magnesium Alloy Cast and Wrought Products.
Current edition approved April 10, 1996. Published June l996. Originally
formed on the whole of the casting, never on a part only, and
published as B 403 – 63 T. Last previous edition B 403 – 90.
shall be applied in a manner that will produce uniformity.
Annual Book of ASTM Standards, Vol 02.02.
Annual Book of ASTM Standards, Vol 14.02.
Annual Book of ASTM Standards, Vol 03.05.
5 7
Annual Book of ASTM Standards, Vol 03.03. Available from Standardization Documents Order Desk, Bldg. 4 Section D700
Annual Book of ASTM Standards, Vol 01.01. Robbins Ave., Philadelphia, PA 19111-5094, Attn: NPODS.
*A Summary of Changes section appears at the end of this standard.
B 403
A
TABLE 1 Chemical Composition Limits
NOTE 1—Analysis shall regularly be made for the elements specifically mentioned in this table. If, however, the presence of other elements is suspected
or indicated in amounts greater than the specified limits, further analysis shall be made to determine that these elements are not present in excess of the
specified limits.
NOTE 2—The following applied to all specified limits in this table: For purposes of acceptance and rejection, an observed value or a calculated value
obtained from analysis should be rounded off to the nearest unit in the last right-hand place of figures used in expressing the specified limit.
B
Alloy Number Composition, percent
C
Others
Total
Magne- Alu- Manga-
Each
ASTM UNS Iron Zinc Zirconium Rare Thorium Copper Nickel Silicon Other
sium minum nese
Earths Impurities
AM100A M10100 . remainder 9.3–10.7 0.10–0.35 0.30 . . . 0.10 0.01 0.30 0.30 .
AZ81A M11810 . remainder 7.0–8.1 0.13–0.35 0.40–1.0 . . . 0.10 0.01 0.30 0.30 .
AZ91C M11914 . remainder 8.1–9.3 0.13–0.35 0.40–1.0 . . . 0.10 0.01 0.30 0.30 .
DE
AZ91E M11919 0.005 remainder 8.1–9.3 0.17–0.35 0.40–1.0 . . . 0.015 0.0010 0.20 0.30 0.01
AZ92A M11920 . remainder 8.3–9.7 0–0.35 1.6–2.4 . . . 0.10 0.01 0.30 0.30 .
F
EQ21A M18330 . remainder . . . 0.40–1.0 1.5–3.0 . 0.05–0.10 0.01 . 0.30 .
EZ33A M12330 . remainder . . 2.0–3.1 0.50–1.0 2.5–4.0 . 0.10 0.01 . 0.30 .
HK31A M13310 . remainder . . 0.30 0.40–1.0 . 2.5–4.0 0.10 0.01 . 0.30 .
K1A M18010 . remainder . . . 0.40–1.0 . . . . . 0.30 .
G G F
QE22A M18220 . remainder . . . 0.40–1.0 1.8–2.5 . 0.10 0.01 . 0.30 .
ZK61A M16610 . remainder . . 5.5–6.5 0.6–1.0 . . 0.10 0.01 . 0.30 .
A
Limits are in weight percent maximum unless shown as a range or stated otherwise.
B
These alloy designations were established in accordance with Practice B 275.
C
Includes listed elements for which no specific limit is shown.
D
If iron content exceeds 0.005 %, the iron to manganese ratio shall not exceed 0.032.
E
Silver content for Alloy EQ21A shall be 1.3 to 1.7 %.
F
Rare earth elements are in the form of didymium.
G
Silver content for Alloy QE22A shall be 2.0 through 3.0 %.
Unless otherwise specified, treatment shall be in accordance 0.250-in. (6.35-mm) diameter round specimen shown in Fig. 8
with Practice B 661. of Test Methods B 557. They shall not be machined prior to test
except to adapt the grip ends to the holders of the testing
6. Chemical Composition
machine to assure axial loading.
6.1 The castings shall conform to the chemical composition 7.3.2 If any tension test specimen is improperly machined
limits in Table 1.
or shows flaws upon testing, it may be discarded and another
6.2 The chemical analysis shall be made in accordance with specimen from the same heat or melt used instead. If no
Test Methods E 35, or by any other
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