ASTM B90/B90M : 12

Standard Specification for Magnesium-Alloy Sheet and Plate

Standard Details

1.1 This specification covers magnesium alloys in sheet and plate form 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 should be rounded to the nearest unit in the last right-hand place of figures used in expressing the specified limit.

	Composition %^A
	Al	Mn	R.E.	Zn	Zr	Ca	Cu	Fe	Ni	Si	Each	Total	Mg
AZ31B	2.5-3.5	0.20-1.0	. . .	0.6-1.4	. . .	0.04	0.05	0.005	0.005	0.10	. . .	0.30	Remainder

^A Limits are in weight percent maximum unless shown as a range.

1.2 The values stated in either inch-pound or SI units are to be regarded separately as StandardDetails. The SI units are shown in brackets or in separate tables or columns. The values stated in each system are not exact equivalents; therefore, each system must be used independent of the other. Combining values from the two systems may result in nonconformance with the specification.

1.3 Unless the order specifies the “M” specification designation, the material shall be furnished to the inch-pound units.

1.4 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.