MSFC-STD-3029A, MSFC TECHNICAL STANDARD: MULTIPROGRAM/PROJECT COMMON-USE DOCUMENT - GUIDELINES FOR THE SELECTION OF METALLIC MATERIALS FOR STRESS CORROSION CRACKING RESISTANCE IN SODIUM CHLORIDE ENVIRONMENTS (24-FEB-2005)

MSFC-STD-3029A, MSFC TECHNICAL STANDARD: MULTIPROGRAM/PROJECT COMMON-USE DOCUMENT - GUIDELINES FOR THE SELECTION OF METALLIC MATERIALS FOR STRESS CORROSION CRACKING RESISTANCE IN SODIUM CHLORIDE ENVIRONMENTS (24-FEB-2005)., MSFC-STD-3029 evolved from MSFC-SPEC-522B (\"Design Criteria for Controlling Stress Corrosion Cracking\"), which was originated as a tool to control stress corrosion cracking throughout NASA programs. The purpose of this document is to provide guidelines to designers regarding materials selection for stress corrosion resistance and to present the requirements for the approval of materials with moderate or high susceptibility. In this revision of MSFC-STD-3029 the austenitic stainless steels CRES 303 and 303Se (free machining steels of the 300 series) have been removed from Table III. These alloys had been classified as highly susceptible to stress corrosion as a conservative approach to recommendations received during the NASA-wide review of the document. Additional testing indicated that these alloys are not susceptible to stress corrosion cracking in a sodium chloride environment at a neutral pH. Therefore, along with other stainless steels of the 300 series (in the unsensitized condition) they are classified as a group in Table I (highly resistant) in this version of the document.