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  • ASTM
    B199-12 Standard Specification for Magnesium-Alloy Permanent Mold Castings
    Edition: 2012
    $93.60
    Unlimited Users per year

Description of ASTM-B199 2012

ASTM B199 - 12

Standard Specification for Magnesium-Alloy Permanent Mold Castings

Active Standard ASTM B199 | Developed by Subcommittee: B07.04

Book of Standards Volume: 02.02




ASTM B199

Abstract

This specification covers magnesium alloy permanent mold casting. 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. 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. The material shall conform to the chemical composition limits prescribed. Any suitable method of chemical analysis may be used. Unless otherwise specified, heat treatment for the applicable tempers designated shall be in accordance with practice B 661 or with Military Specification MIL-M-6857. The tension test specimens representing the castings shall conform to the requirements specified. 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. The tension tests shall be made in accordance with test methods B 557.

This abstract is a brief summary of the referenced standard. It is informational only and not an official part of the standard; the full text of the standard itself must be referred to for its use and application. ASTM does not give any warranty express or implied or make any representation that the contents of this abstract are accurate, complete or up to date.

1. Scope

1.1 This specification covers magnesium alloy permanent mold casting alloys designated as shown in Table 1 .

TABLE 1 Chemical Composition Limits A
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.

Alloy Number B

Composition, %

ASTM

UNS

Iron

Magnesium

Aluminum

Manganese

Zinc

Rare Earths

Zirconium

Silicon

Copper

Nickel

Total C
Other
Impuri-
ties

Others
Each

AM100A

M10100

...

remainder

9.3 to 10.7

0.100.35

0.30

...

...

0.30

0.10

0.01

0.30

...

AZ81A

M11810

...

remainder

7.0 to 8.1

0.130.35

0.40 to 1.0

...

...

0.30

0.10

0.01

0.30

...

AZ91C

M11914

...

remainder

8.1 to 9.3

0.130.35

0.40 to 1.0

...

...

0.30

0.10

0.01

0.30

...

AZ91E

M11919

0.005 D

remainder

8.1 to 9.3

0.170.35

0.40 to 1.0

...

...

0.20

0.015

0.0010

0.30

0.01

AZ92A

M11920

...

remainder

8.3 to 9.7

0.100.35

1.6 to 2.4

...

...

0.30

0.25

0.01

0.30

...

EQ21A E

M18330

...

remainder

...

...

...

1.5 to 3.0 F

0.40 to 1.0

...

0.050.10

0.01

0.30

...

EZ33A

M12330

...

remainder

...

...

2.0 to 3.1

2.5 to 4.0

0.50 to 1.0

...

0.10

0.01

0.30

...

QE22A G

M18220 E

...

remainder

...

...

...

1.8 to 2.5 F

0.40 to 1.0

...

0.10

0.01

0.30

...

A Limits are in weight percent max unless shown as a range or stated otherwise.
B ASTM alloy designations were established in accordance with Practice B951 . UNS designations were established in accordance with Practice E527 .
C Includes 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 content for Alloy EQ21A (M18330) shall be 1.3 to 1.7?%.
F Rare earth elements are in the form of didymium.
G Silver content for Alloy QE22A (M18220) shall be 2.0 to 3.0, inclusive.

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.


2. Referenced Documents (purchase separately) The documents listed below are referenced within the subject standard but are not provided as part of the standard.

ASTM Standards

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)

Federal Standards

Fed.Std.No.123 Marking for Shipment (Civil Agencies) Available from Standardization Documents Order Desk, DODSSP, Bldg. 4, Section D, 700 Robbins Ave., Philadelphia, PA 19111-5098, http://www.dodssp.daps.mil.

Aerospace Materials Specification

AMS2768 Heat Treatment of Magnesium Alloy Castings

Keywords

casting grade; certification; chemical compositions; ductility; gravity die castings; low pressure die castings; ordering information; rejection criteria; strength requirements; tensile properties;


ICS Code

ICS Number Code 77.150.20 (Magnesium products)


DOI: 10.1520/B0199-12

ASTM International is a member of CrossRef.

ASTM B199

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