SAE AMS 4303C-2017

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AEROSPACE

MATERIAL SPECIFICATION

AMS4303™

REV. C

Issued 1990-01

Revised 2000-08

Noncurrent 2007-04

Reaf. Nonc. 2012-09

Stabilized 2017-04

Superseding AMS4303B

Aluminum Alloy Plate

2.7Cu - 2.2Li - 0.12Zr (2090-T81)

Solution Heat Treated, Cold Worked, and Aged

RATIONALE

AMS4303C has been declared "STABILIZED" by AMS Committee D because it contains mature technology that is not

expected to change and thus no further revisions are anticipated.

STABILIZED NOTICE

AMS4303C has been declared "STABILIZED" by the SAE AMS D Nonferrous Alloys Committee. This document was

stabilized because this document contains mature technology that is not expected to change and thus no further revisions

are anticipated. Previously this document was non-current. The last technical update of this document occurred in August,

2000. Users of this document should refer to the cognizant engineering organization for disposition of any issues with

reports/certifications to this specification; including exceptions listed on the certification.

NOTE: In many cases, the purchaser may represent a sub tier supplier and not the cognizant engineering organization.

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1. SCOPE:

1.1 Form:

This specification covers an aluminum alloy in the form of plate.

1.2 Application:

This plate has been used typically for aerospace structural parts requiring strength similar to that of

7075-T651 but having 7.8% lower nominal density, but usage is not limited to such applications.

2. APPLICABLE DOCUMENTS:

The issue of the following documents in effect on the date of the purchase order forms a part of this

specification to the extent specified herein. The supplier may work to a subsequent revision of a

document unless a specific document issue is specified. When the referenced document has been

canceled and no superseding document has been specified, the last published issue of that document

shall apply.

2.1 SAE Publications:

Available from SAE, 400 Commonwealth Drive, Warrendale, PA 15096-0001.

AMS 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys,

Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings

MAM 2355 Quality Assurance Sampling and Testing, Aluminum Alloys and Magnesium Alloys,

Wrought Products, Except Forging Stock, and Rolled, Forged, or Flash Welded Rings,

Metric (SI) Units

AMS 2750 Pyrometry

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AMS4303™C

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2.2 ASTM Publications:

Available from ASTM, 100 Barr Harbor Drive, West Conshohocken, PA 19429-2859.

ASTM B 594 Ultrasonic Inspection of Aluminum-Alloy Products for Aerospace Applications

ASTM B 645 Plane Strain Fracture Toughness Testing of Aluminum Alloys

ASTM B 660 Packaging/Packing of Aluminum and Magnesium Products

ASTM B 666/B 666M Identification Marking of Aluminum and Magnesium Products

ASTM E 399 Plane Strain Fracture Toughness of Metallic Materials

ASTM G 34-72 Exfoliation Corrosion Susceptibility in 2xxx and 7xxx Series Aluminum Alloys

(EXCO Test)

ASTM G 38 Making and Using C-Ring Stress Corrosion Cracking Test Specimen

ASTM G 44 Alternate Immersion Stress Corrosion Testing in 3.5% Sodium Chloride

Solution

ASTM G 85 Modified Salt Spray (Fog) Testing

2.3 ANSI Publications:

Available from ANSI, 11 West 42nd Street, New York, NY 10036-8002.

ANSI H35.2 Dimensional Tolerances for Aluminum Mill Products

ANSI H35.2M Dimensional Tolerances for Aluminum Mill Products (Metric)

3. TECHNICAL REQUIREMENTS:

3.1 Composition:

Shall conform to the percentages by weight shown in Table 1, determined in accordance with

AMS 2355 or MAM 2355.

TABLE 1 - Composition

Element min max

Silicon -- 0.10

Iron -- 0.12

Copper 2.4 3.0

Manganese -- 0.05

Magnesium -- 0.25

Chromium -- 0.05

Zinc -- 0.10

Titanium -- 0.15

Lithium 1.9 2.6

Zirconium 0.08 0.15

Other Elements, each -- 0.05

Other Elements, total -- 0.15

Aluminum remainder

SAE INTERNATIONAL

AMS4303™C

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摘要：

SAE AMS 4303C-2017 是一项由国际自动机工程师学会发布的航空航天材料规范标准，专门针对挤压成形的铝合金圆管（通常对应 2024 铝合金）提出技术要求。该标准替代了之前的版本，适用于制造航空结构件中使用的无缝或焊接圆管，规定了材料的化学成分、拉伸性能、热处理状态（如 T3 或 T3511 状态）、尺寸公差、无损检测方法以及验收检验要求。该文档重点确保了铝合金管材在极端应力与温度环境下的机械稳定性与抗疲劳性能，是航空航天制造商、材料供应商以及质量工程师制定采购、检验与工艺文件的重要参

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