AL-6XN Alloy Fabrication Manual [Corrosion ... - Rolled Alloys

WELD JOINT DESIGNSRA625 or RA112 nickel weld fillers flow more sluggishly than stainless. For this reason jointsneed to be more open at the root. A J- or U-preparation may be needed with RA625 where aV would suffice with ER 308 stainless. Avoid feather-edge roots--these promote high dilutionand reduced corrosion resistance. The following are a few suggested joint designs, intendedto achieve full penetration welds.JOINT DESIGN 1. Square Butt JointJOINT DESIGN 2. Single "V" JointMaximum t = 1/8" Gap A = 1/16" to 3/32"Gap A - 1/16" to 1/32" Land B = 1/16" to 3/32"Angle C - 60 - 75JOINT DESIGN 3. Double "V" JointJOINT DESIGN 4. Single "U" JointGap A = 1/16" to 1/8" Gap A = 1/16" to 1/8"Land B = 1/16" to 3/32" Land B = 1/16" to 3/32"t = 1/2" or greaterRadius R = 3/8" MinimumAngle C = 60 - 75For single groove welds on heavy plate 3/4"and over. Reduces the amount of time andfiller metal required to complete weld.JOINT DESIGN 5. Double "U" JointJOINT DESIGN 6. "J" Groove JointGap A = 1/16" to 1/8" Gap A = 1/16" to 1/8"Land B = 1/16" to 3/32" Land B = 1/16" to 3/32"Radius R = 3/8" MinimumRadius R = 3/8" MinimumMinimum t = 3/4"For single groove welds on plates thickerthan 3/4". Reduces the amount of time andfiller metal required to complete the weld.9