Accession Number:

AD0600899

Title:

THE INVESTIGATION OF STRESS CORROSION CRACKING OF HIGH STRENGTH STEELS

Descriptive Note:

Informal monthly rept. for Apr 1964

Corporate Author:

AEROJET-GENERAL CORP AZUSA CA

Personal Author(s):

• Brelant, S.

Report Date:

1964-06-03

Pagination or Media Count:

6.0

Abstract:

Stress corrosion susceptibility of maraging steel increases with strength level. Complete immunity to failure can be obtained with the conventional martensitic steels by employing a sufficiently high tempering temperature. The addition of 3 NaCl to distilled water lessens the susceptibility of the test alloys to stress corrosion failure. In distilled water environments controlled to 120 and 160 F, all specimens failed except for a low alloy steel tempered at 1100 F. Environmental temperature was found to have a great effect on the failure time of maraging steel with the susceptibility doubling for every 18 F increase in temperature. By application of the proper amount of cathodic current, stress corrosion cracking of maraging steel may be stopped. However, if the current is increased over this critical amount, no protection is furnished.

Descriptors:

• *STRESS CORROSION
• *MARAGING STEELS
• TEMPERATURE
• STEEL
• FRACTURE(MECHANICS)
• MARTENSITE
• CORROSIVE LIQUIDS
• FAILURE(MECHANICS)
• NICKEL ALLOYS
• CATHODIC PROTECTION

Subject Categories:

• Properties of Metals and Alloys

Distribution Statement:

APPROVED FOR PUBLIC RELEASE