Каталог стандартов
+7 (495) 223-46-76
+7 (812) 309-78-59
inform@normdocs.ru
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 применения1.1 This specification covers magnesium-alloy investment castings designated as shown in Table 1.
TABLE 1 Chemical Composition LimitsANote 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
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
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.