ASTM B199-17

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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: B199 − 12 B199 − 17
Standard Specification for
Magnesium-Alloy Permanent Mold Castings
This standard is issued under the fixed designation B199; 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 U.S. Department of Defense.
1. Scope*
1.1 This specification covers magnesium alloy permanent mold casting alloys designated as shown in Table 1.Table 1.
1.2 The values stated in inch-pound units are to be regarded as the standard. The SI values given in parentheses are provided
for information only.
1.3 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.
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.
2. Referenced Documents
2.1 The following documents of the issue in effect on date of order acceptance form a part of this specification to the extent
referenced herein:
2.2 ASTM Standards:
B93/B93M Specification for Magnesium Alloys in Ingot Form for Sand Castings, Permanent Mold Castings, and Die Castings
B296 Practice for Temper Designations of Magnesium Alloys, Cast and Wrought
B557 Test Methods for Tension Testing Wrought and Cast Aluminum- and Magnesium-Alloy Products
B660 Practices for Packaging/Packing of Aluminum and Magnesium Products
B661 Practice for Heat Treatment of Magnesium Alloys
B951 Practice for Codification of Unalloyed Magnesium and Magnesium-Alloys, Cast and Wrought
B953 Practice for Sampling Magnesium and Magnesium Alloys for Spectrochemical Analysis
B954 Test Method for Analysis of Magnesium and Magnesium Alloys by Atomic Emission Spectrometry
E8 Test Methods for Tension Testing of Metallic Materials
E29 Practice for Using Significant Digits in Test Data to Determine Conformance with Specifications
E88 Practice for Sampling Nonferrous Metals and Alloys in Cast Form for Determination of Chemical Composition
E94 Guide for Radiographic Examination
E155 Reference Radiographs for Inspection of Aluminum and Magnesium Castings
E165 Practice for Liquid Penetrant Examination for General Industry
E527 Practice for Numbering Metals and Alloys in the Unified Numbering System (UNS)
2.3 Federal Standards:
Fed. Std. No. 123 Marking for Shipment (Civil Agencies)
2.4 Aerospace Materials Specification:
AMS 2768 Heat Treatment of Magnesium Alloy Castings
This specification is under the jurisdiction of ASTM Committee B07 on Light Metals and Alloys and is the direct responsibility of Subcommittee B07.04 on Magnesium
Alloy Cast and Wrought Products.
Current edition approved Nov. 1, 2012May 1, 2017. Published November 2012May 2017. Originally approved in 1945. Last previous edition approved in 20072012 as
B199 – 07.B199 – 12. DOI: 10.1520/B0199-12.10.1520/B0199-17.
For referenced ASTM standards, visit the ASTM website, www.astm.org, or contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM Standards
volume information, refer to the standard’s Document Summary page on the ASTM website.
Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.
Available from SAE International (SAE), 400 Commonwealth Dr.,Warrendale, PA 15096-0001, http://www.sae.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
B199 − 17
3. Terminology
3.1 Definitions:
3.1.1 permanent mold casting—casting, n—a metal object produced by introducing molten metal by gravity or low pressure into
a mold constructed of durable material, usually iron or steel, and allowing it to solidify.
3.1.2 semipermanent mold casting—casting, n—a permanent mold casting which is made using an expendable core such as
bonded sand.
4. Ordering Information
4.1 Orders for castings under this specification shall include the following information:
4.1.1 Quantity of each casting,
4.1.2 Alloy (Section 7 and Table 1),
4.1.3 Temper (Section 8 and Table 2),
4.1.4 Minimum properties of specimens cut from castings, if required (see section 9.3),
4.1.5 Drawing showing dimensions of the castings (the amount of stock left for machine finish should be indicated),
4.1.6 Surface treatment (see 10.1),
4.1.7 Whether inspection is required at the manufacturer’s works (see section 11.1.1),
4.1.8 Special inspection requirements (see 11.2),
4.1.9 Whether certification is required (see 13.1), and
4.1.10 Whether marking for identification is required (see 14.1).
A
TABLE 1 Chemical Composition Limits
NOTE 1—Analysis shall regularly be made only 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 applies to all specified limits in this table: For purposes of acceptance and rejection, 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.
B
Alloy Number Composition, %
C
Total
Magne- Manga- Rare Nickel Others
Other
ASTM UNS Iron Aluminum Zinc Zirconium Silicon Copper
Impuri-
sium nese Earths Each
ties
C
Total
Magne- Manga- Rare Zirco- Others
ASTM UNS Aluminum Copper Iron Nickel Silicon Zinc Other
sium nese Earths nium Each
Impurities
AM100A M10100 . remainder 9.3 to 0.10–0.35 0.30 . . 0.30 0.10 0.01 0.30 .
10.7
AM100A M10100 remainder 9.3–10.7 0.10 . . . 0.10–0.35 0.01 . . . 0.30 0.30 . . . . . . 0.30
AZ81A M11810 . remainder 7.0 to 0.13–0.35 0.40 to . . 0.30 0.10 0.01 0.30 .
8.1 1.0
AZ81A M11810 remainder 7.0–8.1 0.10 . . . 0.13–0.35 0.01 . . . 0.30 0.40–1.0 . . . . . . 0.30
AZ91C M11914 . remainder 8.1 to 0.13–0.35 0.40 to . . 0.30 0.10 0.01 0.30 .
9.3 1.0
AZ91C M11914 remainder 8.1–9.3 0.10 . . . 0.13–0.35 0.01 . . . 0.30 0.40–1.0 . . . . . . 0.30
D
AZ91E M11919 0.005 remainder 8.1 to 0.17–0.35 0.40 to . . 0.20 0.015 0.0010 0.30 0.01
9.3 1.0
D
AZ91E M11919 remainder 8.1–9.3 0.015 0.005 0.17–0.35 0.0010 . . . 0.20 0.40–1.0 . . . 0.01 0.30
AZ92A M11920 . remainder 8.3 to 0.10–0.35 1.6 to 2.4 . . 0.30 0.25 0.01 0.30 .
9.7
AZ92A M11920 remainder 8.3–9.7 0.25 . . . 0.10–0.35 0.01 . . . 0.30 1.6–2.4 . . . . . . 0.30
E
EQ21A M18330 . remainder . . . 1.5 to 0.40 to . 0.05–0.10 0.01 0.30 .
F
3.0 1.0
E F
EQ21A M18330 remainder . . . 0.05–0.10 . . . . . . 0.01 1.5–3.0 . . . . . . 0.40–1.0 . . . 0.30
EZ33A M12330 . remainder . . 2.0 to 3.1 2.5 to 4.0 0.50 to . 0.10 0.01 0.30 .
1.0
EZ33A M12330 remainder . . . 0.10 . . . . . . 0.01 2.5–4.0 . . . 2.0–3.1 0.50–1.0 . . . 0.30
G E
QE22A M18220 . remainder . . . 1.8 to 0.40 to . 0.10 0.01 0.30 .
F
2.5 1.0
G E F
QE22A M18220 remainder . . . 0.10 . . . . . . 0.01 1.8–2.5 . . . . . . 0.40–1.0 . . . 0.30
A
Limits Limits are in weight percent max unless shown as a range or stated otherwise.
B
ASTM ASTM alloy designations were established in accordance with Practice B951. UNS designations were established in accordance with Practice E527.
C
IncludesIncludes listed elements for which no specific limit is shown.
D
If iron exceeds 0.005 %, the iron to manganese ratio shall not exceed 0.032.
E
Silver Silver content for Alloy EQ21A (M18330) shall be 1.3 to 1.7 %.
F
Rare earth elements are in the form of didymium.
G
Silver Silver content for Alloy QE22A (M18220) shall be 2.0 to 3.0, inclusive.
B199 − 17
TABLE 2 Tensile Requirements
NOTE 1—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.
Elongation in
Alloy Number
B
Tensile Strength, min.
Yield Strength (0.2 %
A
Temper 2 in., (50.8 mm)
offset) min. ksi (MPa)
ksi (MPa)
ASTM UNS
min., %
C
AM100A M10100 F 20.0 (138) 10.0 (69)
T4 34.0 (234) 10.0 (69) 6
T6 34.0 (234) 15.0 (103) 2
C
T61 34.0 (234) 17.0 (117)
AZ81A M11810 T4 34.0 (234) 11.0 (76) 7
C
AZ91C M11914 F 23.0 (158) 11.0 (76)
T4 34.0 (234) 11.0 (76) 7
T5 23.0 (158) 12.0 (83) 2
T6 34.0 (234) 16.0 (110) 3
AZ91E M11919 T6 34.0 (234) 16.0 (110) .
C
AZ92A M11920 F 23.0 (158) 11.0 (76)
T4 34.0 (234) 11.0 (76) 6
C
T5 23.0 (158) 12.0 (83)
C
T6 34.0 (234) 18.0 (124)
EQ21A M18330 T6 34.0 (234) 25.0 (172) .
EZ33A M12330 T5 20.0 (138) 14.0 (96) 2
QE22A M18220 T6 35.0 (241) 25.0 (172) 2
A
These temper designations were established in accordance with Practice B296.
B
See X1.3.
C
Not required.
5. Manufacture
5.1 The responsibility of furnishing castings that can be laid out and machined to the finished dimensions within the permissible
variations specified, as shown on the blueprints or drawings, shall rest with the supplier, except when molds are furnished by the
purchaser. Sufficient stock shall be allowed for shrinkage, and where requested, for finishing; castings of excessive weight shall
not be furnished.
5.2 The castings may be subjected to the heat treatment necessary to produce material that will conform to the requirements
specified. Heat treatment shall be performed on the whole of a casting, never on a part only, and shall be applied in a manner that
will produce the utmost uniformity.
6. General Quality
6.1 The castings shall be of uniform quality and condition, free of cracks or other injurious defects, and shall be well cleaned
by sand blasting or any other approved process before inspection.
7. Chemical Composition
7.1 Limits—The material shall conform to the chemical composition limits prescribed in Table 1. Conformance shall be
determined by analyzing samples taken when the castings are poured, or by analyzing samples taken from the finished product.
If the chemical composition has been determined during the course of manufacture, sampling and analysis of the finished product
is not necessary.
7.2 Number of Samples—The number of samples taken for determination of chemical composition shall be as follows:
7.2.1 When samples are taken at the time the castings are poured, at least one sample shall be taken from each melt of 2000
lb (907 kg) or fraction thereof.
7.2.2 When samples are taken from the castings or test bars, a sample shall be taken to represent each 2000 lb (907 kg) or
fraction thereof in the shipment except that not more than one sample shall be required per casting.
7.3 Methods of Sampling—Samples for determination of chemical composition shall be taken in accordance with one of the
following methods:
7.3.1 Samples for chemical analysis shall be taken from the material by drilling, sawing, milling, turning, or clipping a
representative piece or pieces to obtain a weight of prepared sample not less than 75 g. Sampling shall be in accordance with
Practice E88.
7.3.2 Samples for spectrochemical analysis shall be in accordance with Practice B953, or other methods of analysis shall be
taken by methods suitable for the form of material being analyzed and the type of analytical method used.
7.4 Methods of Chemical Analysis—Any suitable method of chemical analysis may be used. In case of dispute, the analysis shall
be made by methods given in Test Method B954 or any other standard methods of analysis approved by ASTM unless some other
method is agreed upon.
B199 − 17
8. Heat Treatment
8.1 Unless otherwise specified, heat treatment for the applicable tempers designated in Table 2 shall be in accordance with
Practice B661 or with AMS 2768.
9. Tensile Requirements
9.1 Limits—The tension test specimens representing the castings shall conform to the requirements of Table 2.
9.2 Number of Tests—At least one tension test specimen shall be cast from each melt of 2000 lb (907 kg) or fraction thereof
to represent the castings poured from the same melt. If the castings are to be heat treated, the specimens shall be heat treated with
production castings of the same alloy and in the same temper as the specimens. The specimens shall then be tested to judge the
response of their corresponding melts to the type of heat treatment to which the specimens were subjected.
9.2.1 Each heat-treating furnace charge shall include at least one tension test specimen poured from a production melt. Such
specimens shall be of the same alloy and in the same temper as the castings, and shall be tested to judge the quality of the
heat-treating operation given the furnace charge.
9.3 If test bars are cut from castings, the number and location shall be as agreed upon between the supplier and the purchaser.
Depending on the radiographic quality specified (see 11.4), test bars cut from casting may not meet the requirements of Table 2.
Mechanical property limits from cut bars shall be agreed to by the supplier and purchaser.
9.4 Test Specimens—The tension test specimens shall be separately cast in a permanent mold and shall be cast to size in
accordance with the dimensions shown in Fig. 89 of Test Method B557. T
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