NASA MSFC SPEC 504 : 1990

1.0 SCOPE
1.1 CLASSIFICATIONS
     1.1.1 WELDING PROCESSES
     1.1.2 WELD CLASSES
2.0 APPLICABLE DOCUMENTS
2.1 DOCUMENTS
     2.1.1 FEDERAL
     2.1.2 MILITARY
     2.1.3 NASA
     2.1.4 AMERICAN WELDING SOCIETY
     2.1.5 AMERICAN SOCIETY FOR TESTING AND MATERIALS
3.0 REQUIREMENTS
3.1 EQUIPMENT
     3.1.1 WELDING EQUIPMENT
     3.1.2 TOOLING AND FIXTURES
3.2 MATERIALS
     3.2.1 BASE METALS
     3.2.2 FILLER METALS
     3.2.3 SHIELDING GAS
     3.2.4 TUNGSTEN ELECTRODES
3.3 WELD PROCEDURE AND PERFORMANCE QUALIFICATION
     3.3.1 WELDER PERFORMANCE QUALIFICATION
     3.3.2 WELD PROCEDURE SPECIFICATION
     3.3.3 WPS QUALIFICATION
     3.3.4 RECORDS
     3.3.5 WELDING PROCEDURE SPECIFICATION APPROVAL
3.4 PREWELD OPERATIONS
     3.4.1 JOINT DESIGN
     3.4.2 PREWELD CLEANING
     3.4.3 INSPECTION
3.5 PRODUCTION WELDING
     3.5.1 EQUIPMENT OPERATIONAL CHECK
     3.5.2 TEMPERATURE CONTROL
     3.5.3 TACK WELDING
     3.5.4 WELDING TECHNIQUE
     3.5.5 WELDING PROCEDURE
     3.5.6 PROCEDURE DEPARTURE
3.6 POST WELD OPERATIONS
     3.6.1 INSPECTION
     3.6.2 GENERAL WORKMANSHIP REQUIREMENTS
     3.6.3 DIMENSIONAL REQUIREMENTS
     3.6.4 WELDMENT STRAIGHTENING
     3.6.5 POST WELD HEAT TREAT REQUIREMENTS
3.7 WELD JOINT STRENGTH REQUIREMENTS
     3.7.1 BUTT JOINTS
     3.7.2 FILLET WELDS
3.8 REPAIR WELDING
     3.8.1 REPAIR WELDING REQUIREMENTS
     3.8.2 MATERIAL REVIEW BOARD
     3.8.3 REINSPECTION OF REPAIRS
3.9 WELDMENT EXTERNAL QUALITY REQUIREMENTS
     3.9.1 FACE AND ROOT SIDE INSPECTION
     3.9.2 REINFORCEMENT REQUIREMENTS
     3.9.3 CLASS I AND III
     3.9.4 CLASSES II AND IV
     3.9.5 CLASS V AND VI
3.10 WELDMENT INTERNAL QUALITY REQUIREMENTS
     3.10.1 INTERNAL QUALITY REQUIREMENTS
     3.10.2 CLASS I
     3.10.3 CLASS II
4.0 QUALITY ASSURANCE
4.1 RESPONSIBILITY FOR PERFORMANCE
4.2 NDE PROCEDURES
4.3 JOINT DESIGN AND WPS QUALITY ASSURANCE
4.4 PREWELD AND WELD INSPECTION
     4.4.1 DOCUMENTATION
     4.4.2 FILLER METALINSPECTION
     4.4.3 INERT SHIELDING GAS INSPECTION
     4.4.4 WELD JOINT AND TOOLING INSPECTION
     4.4.5 EQUIPMENT INSPECTION
     4.4.6 QUALITY ASSURANCE RESPONSIBILITY
4.5 POST WELD INSPECTION
     4.5.1 VISUAL INSPECTION
     4.5.2 DIMENSIONAL INSPECTION
     4.5.3 INTERNAL QUALITY INSPECTION
     4.5.4 SURFACE QUALITY INSPECTION
5.0 NOTES
5.1 INTENDED USE
5.2 ORDERING DATA
5.3 DEFINITIONS
     5.3.1 MATERIAL THICKNESS
     5.3.2 WELD INTERSECTION
     5.3.3 WELDER PERFORMANCE QUALIFICATION
     5.3.4 WELD PROCEDURE SPECIFICATION
     5.3.5 SPECIAL TEST WELDMENTS
     5.3.6 STANDARD TEST WELDMENTS
     5.3.7 PROCEDURE QUALIFICATION RECORD
     5.3.8 QUALIFIED INSPECTOR
     5.3.9 OPTIMUM ANGLE
5.4 SYMBOLS
     5.4.1 WELDING SYMBOLS
5.5 CHANGES

Covers the welding and quality assurance requirements for manual and mechanized welding of aluminium and aluminium alloy materials for flight and support applications.