Title

Steel Aircraft Casings

Description

Alloy steels selected for environmental requirements of 600°F and 900°F were modified to permit production of high strength, precision steel castings for aircraft. Strength on the order of 200,000 psi at room temperature and 170,000 psi at 900°F were obtained with one alloy, and 360,000 psi at room temperature and 245,000 psi at 600°F with a second alloy. The modified alloys were AM-355 and 4340.

Casting designs were developed and foundry techniques established to produce three casting configurations utilizing three different foundry processes. Castings were produced and static and fatigue tests were performed to prove the ability to reproduce the mechanical properties obtained during the alloy development phase.

Problem areas were found to exist whereby increased process control and inspection requirements were necessary to permit the use of high strength precision steel casting in aircraft designs. Utilizing these increased process controls and increased criteria, the castings were proven to be feasible as well as competitive with other fabrication processes.

Date

1961

Index Abstract

Contrails and DTIC truncated

Photo Quality

Incomplete

Report Number

ASD TR 61-7-630

Creator

Elizondo, Y. J.

Turner, C. T.

Vorhes, W. B.

Corporate Author

Chance Vought Corporation, Aeronautics Division

Laboratory

Manufacturing Technology Laboratory

Extent

297

Identifier

AD0264691

AD0264691

Distribution Classification

1

Contract

AF 33(600)-36159

DoD Project

7-360

DoD Task

None Given

DTIC Record Exists

Yes

Distribution Change Authority Correspondence

None

Abstract

Alloy steels selected for environmental requirements of 600°F and 900°F were modified to permit production of high strength, precision steel castings for aircraft. Strength on the order of 200,000 psi at room temperature and 170,000 psi at 900°F were obtained with one alloy, and 360,000 psi at room temperature and 245,000 psi at 600°F with a second alloy. The modified alloys were AM-355 and 4340.

Casting designs were developed and foundry techniques established to produce three casting configurations utilizing three different foundry processes. Castings were produced and static and fatigue tests were performed to prove the ability to reproduce the mechanical properties obtained during the alloy development phase.

Problem areas were found to exist whereby increased process control and inspection requirements were necessary to permit the use of high strength precision steel casting in aircraft designs. Utilizing these increased process controls and increased criteria, the castings were proven to be feasible as well as competitive with other fabrication processes.

Report Availability

Full text available by request

Date Issued

1961-08

Type

report

Provenance

Lockheed Martin Missiles & Fire Control

Subject

Airframes

Steel

Aircraft

Casting

Castings

Degasification

Deoxidation (Metallurgy)

Melting

Nondestructive Testing

Processing

Surface Properties

Publisher

Wright-Patterson Air Force Base, OH : Basic Industry Branch, Manufacturing Technology Laboratory, ASD Aeronautical Systems Division, United States Air Force

Distribution Conflict

No