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Normas ASTM – AENOR
ASTM B686/B686M-14

ASTM B686/B686M-14

Standard Specification for Aluminum Alloy Castings, High-Strength

Fecha:
2018-06-28 /Historical
Superseeded by:
Abstract:

This specification covers aluminum-alloy high-strength castings in the following designations: A12010, A03540, A33550, A13560, and A13570. Castings covered by this specification are intended for use in airframe, missile, and other critical applications where high strength, ductility, and sound castings are required. Castings shall be classified by inspection classes: Class 1, Class 2, Class 3, and Class 4 and shall be specified as Grade A, Grade B, Grade C, or Grade D based on radiographic quality. Requirements for the casting process, chemical composition analysis, preproduction sample, radiographic soundness and mechanical property control (including foundry control and acceptance procedure), heat treatment, tensile testing, and dimensions are detailed. The castings shall conform to the chemical composition prescribed for silicon, iron, copper, manganese, magnesium, zinc, titanium, and aluminum, and to the specified mechanical properties such as tensile strength, yield strength and elongation.

Scope:

1.1 This specification covers aluminum-alloy high-strength castings designated as shown in Table 1.

(A) “Others” includes listed elements for which no specific limit is shown as well as unlisted metallic elements. The producer may analyze samples for trace elements not specified in the specification. However, such analysis is not required and may not cover all metallic “Others” elements. Should any analysis by the producer or the purchaser establish that an “Others” element exceeds the limit of “Each” or that the aggregate of several “Others” elements exceeds the limit of “Total,” the material shall be considered nonconforming.
(B) Other Elements—Total shall be the sum of unspecified metallic elements 0.010 % or more, rounded to the second decimal before determining the sum.
(C) Silver 0.40 to 1.0 %.
(D) Beryllium 0.04–0.07.

1.2 Castings covered by this specification are intended for use in airframe, missile, and other critical applications where high strength, ductility, and sound castings are required.

1.3 Alloy and temper designations are in accordance with ANSI H35.1/H35.1 (M). The equivalent Unified Numbering System alloy designations are in accordance with Practice E527.

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

1.5 For acceptance criteria for inclusion of new aluminum and aluminum alloys and their properties in this specification, see Annex A1 and Annex A2.

1.6 Units—The values stated in either SI units or inch-pound units are to be regarded separately as standard. The values stated in each system may not be exact equivalents; therefore, each system shall be used independently of the other. Combining values from the two systems may result in non-conformance with the standard.

1.7 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 regular limitations prior to use.

Keywords:
aluminum; high strength; sand casting
58,55
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