MRO Products: Pre-Sintered Preforms

Pre-sintered preforms are a customised blend of superalloy and braze powders in either a plate form or specific shape allows selective build-up of worn surfaces to be achieved quickly and efficiently offering savings in time and cost. Extrudable paste allows for application in difficult to reach areas and a brushable paint form is used for sealing deep or narrow cracks or micro-cracks.

With our PSP™ technology, low porosity eliminates braze repair shrinkage. The porosity of custom performs is less than 2%, so little or no shrinkage occurs–this is a major advantage of MTC Wesgo^® Metals' PSPs™ over traditional brazing pastes and green tapes. These braze methods present several problems, primarily with uncontrollable shrinkage and multiple re-brazing cycles. Unlike pastes and green tapes, PSP™ components require minimal post-braze grinding or machining to restore a part to its original dimensions. PSPs™ are available in a flat plate, cut preforms, tapered and curved preforms and a 3-Dimensional bushing, which is used to restore worn holes or bores.

Typical superalloys used in pre-sintered preforms:

• Inco 939
• T800
• SA650 (GE only)
• Hastelloy X
• Haynes 188
• MarM 247
• René 142

Typical braze alloys used in pre-sintered preforms:

• AD914
• AMS 4776
• AMS 4778
• DF-3
• DF-4B
• DF-5
• DF-6
• Inco 718B
• MarM 509B
• S57B
• Custom OEM alloys

Find out more on our braze alloys by clicking the links below:

• Brazing alloys
• Active Brazing Alloys
• Precious brazing filler metals
• Non-precious brazing filler metals
• Melt spun foil