FEB 1 4 1969

NATIONAL BUREAU OF STANDARDS REPORT

9990

Progress Report

STRESS CORROSION BEHAVIOR

OF HIGH STRENGTH CORROSION RESISTANT MATERIALS

To

Materials Division

Naval Air Systems Command

Department of the Navy

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS
NATIONAL BUREAU OF STANDARDS

The National Bureau of Standards 1 was established by an act of Congress March 3, 1901. Today, in addition to serving as the Nation’s central measurement laboratory,

the Bureau is a principal focal point in the Federal Government for assuring maximum application of the physical and engineering sciences to the advancement of technology in industry and commerce. To this end the Bureau conducts research and

provides central national services in three broad program areas and provides central national services in a fourth. These are: (1) basic measurements and standards,

(2) materials measurements and standards, (3) technological measurements and

standards, and (4) transfer of technology.

The Bureau comprises the Institute for Basic Standards, the Institute for Materials

Research, the Institute for Applied Technology, and the Center for Radiation Research.

THE INSTITUTE FOR BASIC STANDARDS provides the central basis within the

United States of a complete and consistent system of physical measurement, coor- dinates that system with the measurement systems of other nations, and furnishes

essential services leading to accurate and uniform physical measurements throughout

the Nation’s scientific community, industry, and commerce. The Institute consists

of an Office of Standard Reference Data and a group of divisions organized by the

following areas of science and engineering:

Applied Mathematics—Electricity—Metrology—Mechanics—Heat—Atomic Physics—Cryogenics2—Radio Physics2 —Radio Engineering2—Astrophysics2—Time

and Frequency.2 THE INSTITUTE FOR MATERIALS RESEARCH conducts materials research leading to methods, standards of measurement, and data needed by industry, commerce,

educational institutions, and government. The Institute also provides advisory and

research services to other government agencies. The Institute consists of an Office of

Standard Reference Materials and a group of divisions organized by the following

areas of materials research:

Analytical Chemistry—Polymers—Metallurgy — Inorganic Materials — Physical

Chemistry.

THE INSTITUTE FOR APPLIED TECHNOLOGY provides for the creation of appropriate opportunities for the use and application of technology within the Federal Government and within the civilian sector of American industry. The primary functions

of the Institute may be broadly classified as programs relating to technological meas- urements and standards and techniques for the transfer of technology. The Institute

consists of a Clearinghouse for Scientific and Technical Information,3 a Center for

Computer Sciences and Technology, and a group of technical divisions and offices organized by the following fields of technology

:

Building Research—Electronic Instrumentation — Technical Analysis — Product

Evaluation—Invention and Innovation— Weights and Measures —Engineering

Standards—Vehicle Systems Research.

THE CENTER FOR RADIATION RESEARCH engages in research, measurement,

and application of radiation to the solution of Bureau mission problems and the

problems of other agencies and institutions. The Center for Radiation Research consists of the following divisions

:

Reactor Radiation—Linac Radiation—Applied Radiation—Nuclear Radiation.

1 Headquarters and Laboratories at Gaithersburg, Maryland, unless otherwise noted ; mailing address Washington, D. C. 20234.

2 Located at Boulder, Colorado 80302.

3 Located at 5285 Port Royal Road, Springfield, Virginia 22151.
NATIONAL BUREAU OF STANDARDS REPORT

MBS PROJECT

3120410

FEB 1 4 1969

NBS REPORT

9990

Progress Report

on STRESS CORROSION BEHAVIOR

OF HIGH STRENGTH CORROSION RESISTANT MATERIALS

By

W. F. Gerhold

Engineering Metallurgy Section

To

Materials Division

Naval Air Systems Command

Department of the N avy

IMPORTANT NOTICE NATIONAL BUREAU OF STAh

for use within the Government. B( and review. For this reason, the p whole or in part, is not authorize Bureau of Standards, Washington,

the Report has been specifically pr

Approved for public release by the

Director of the National Institute of

Standards and Technology (NIST) on October 9, 2015

accounting documents intended

bjected to additional evaluation

sting of this Report, either in

Office of the Director, National

the Government agency for which

ies for its o.vn use.

U.S. DEPARTMENT OF COMMERCE

NATIONAL BUREAU OF STANDARDS

Progress Report

on Stress Corrosion Behavior

of High Strength Corrosion Resistant Materials

W. F. Gerhold

Engineering Metallurgy Section

Results to date in the investigation of the stress-corrosion behavior

of high strength corrosion-resistant materials (authorized under RRMA 2007 ) are included herein.

The materials that are being studied in this investigation include

the fol lowi ng:

Alloy Stee 1

s

Ph 14-4 Mo, "C"-rings

Ph 14-8 Mo, sheet

17"4 PH, sheet

17-4 PH, forging

PH 15-7 Mo, sheet

AM 350, sheet

AM 355> sheet

AM 355 , wi re AM 357> sheet

17-7 PH, sheet

17-7 PH, wire

Thermeno 1 , sheet

A 286, sheet

HNM, sheet

17 Cr-5 Ni , foil

Ti tani um A1 loys

6 AV-4V

C105 VA

A 1 10 AT

Cl 15 VA

B 120 VCA

The tests are being conducted in the marine atmosphere at the 80' and 800 1 lots at Kure Beach, N. C. Table 1 and Table 2 contain the results obtained

from tests conducted at the 80 ' lot and the 800 ' lot, respectively.

These tests are continuing.

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2.

Stress

Corrosion

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