ASTM-B403 Standard Specification for Magnesium-Alloy Investment Castings

ASTM-B403 - 2012 EDITION - CURRENT
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This specification covers magnesium-alloy investment castings designated as AM100A, AZ81A, AZ91C, AZ91E, AZ92A, EQ21A, EZ33A, K1A, QE22A, ZE41A, and ZK61A. Sufficient stock shall be allowed for shrinkage and, where required, for finishing; but castings of excessive weight shall not be furnished. The castings shall conform to the chemical composition requirements prescribed for magnesium, aluminum, manganese, zinc, zirconium, rare earth elements, copper, nickel, silicon, iron, and other impurities, as determined by chemical analysis, and shall meet the specified requirements for the tensile properties such as tensile strength, yield strength, and elongation. Requirements for heat treatment and tensile test are detailed. The castings shall be of uniform quality and condition, free from cracks and other injurious defects, shall be cleaned before inspection by blasting or other approved process, and shall not be repaired by welding, impregnation, peening, or other method unless it is required.

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Scope

1.1 This specification covers magnesium-alloy investment castings designated as shown in Table 1.

TABLE 1 Chemical Composition LimitsA
Note 1Analysis 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 2The 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.

Alloy Number B

 

Composition, percent

Others
 Each

 ASTM

 UNS

 

 Iron

 Magne-
  sium

 

  Alu-
 minum

 Manga-
  nese

 

  Zinc

Zirconium

  
 Rare Earths

 Thorium

 Copper

 Nickel

Silicon

  TotalC
  Other
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

  ...

AZ91E

M11919

 

0.005D E

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

  ...

EQ21A

M18330

 

...

remainder

 

...

...

 

...

0.40–1.0

1.5–3.0F

...

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

  ...

K1A

M18010

 

...

remainder

 

...

...

 

...

0.40–1.0

...

...

...

...

...

  0.30

  ...

QE22AG

M18220G

 

...

remainder

 

...

...

 

...

0.40–1.0

1.8–2.5F

...

0.10

0.01

...

  0.30

  ...

ZE41A

M16410

 

...

remainder

 

...

0.15

 

3.5–5.0

0.40–1.0

0.75–1.75

...

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 B951.
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 %.

1.2 Alloy designations are in accordance with Practice E527; temper designations are in accordance with Practice B296.

1.3 The values stated in inch-pound units are to be regarded as the standard. The SI values in parentheses are for information only.

Keywords

investment castings; magnesium alloy; ICS Number Code 77.150.20 (Magnesium products)

To find similar documents by ASTM Volume:

02.02 (Aluminum and Magnesium Alloys)

To find similar documents by classification:

77.150.20 (Magnesium products)

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Document Number

ASTM-B403-12

Revision Level

2012 EDITION

Status

Current

Modification Type

Revision

Publication Date

Dec. 1, 2012

Document Type

Specification

Page Count

4 pages

Committee Number

B07.04