Стандарт ASTM B403-12

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.

Область применения

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

TABLE 1 Chemical Composition Limits^A

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.

Alloy Number ^B		Composition, percent												Others Each
ASTM	UNS	Iron	Magne- sium	Alu- minum	Manga- nese	Zinc	Zirconium	Rare Earths	Thorium	Copper	Nickel	Silicon	Total^C Other Impurities	Others Each
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	0.005^D ^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	1.5–3.0^F	...	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	...
QE22A^G	M18220^G	...	remainder	...	...	...	0.40–1.0	1.8–2.5^F	...	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.

Ключевые слова:

investment castings; magnesium alloy

Взамен:

ASTM B403-07

Заменен на:

ASTM B403-20

Ссылочные документы:

ASTM B660ASTM B557ASTM B296ASTM B666/B666MASTM B951ASTM B953ASTM D3951ASTM E94ASTM E155ASTM B661ASTM B954ASTM E88ASTM E165ASTM E29ASTM E527

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