0715-ANCORBRAZE 72-DASP-2
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Ancorbraze® 72
Ancorbraze 72 is the premiere sinterbraze
material for the joining of ferrous P/M parts to
each other, or ferrous P/M parts to wrought
substrates. Successful brazing can be done in
the green or sintered condition. The chemical
composition of the Ancorbraze 72 material –
which can be utilized in the "as-atomized" or
fluxed forms — effectively limits the penetration
of the braze compound to the area immediately
adjoining the desired interface. Each brazing
application has unique characteristics due to
variations in part composition and
processing/sintering parameters. The typical
Ultimate Tensile Strength of a brazed joint is
55,000 – 60,000 psi.
Nominal Chemical Composition (w/o)
Copper
Nickel
Silicon
Manganese
Boron
Other
40
41
1.8
15.0
1.5
1% max
AB72
Apparent Density (g/cm3)
Virgin (40/200)
2.00
Operating Temperature ( ˚C / ˚F )
Solidus
899/1650
Liquidus
982/1800
Sieve Distribution (w/o)
Micrometers
+400
-75
U.S. Standard Mesh
(+40)
(-200)
5 maximum
5 maximum
5.50
25
30
Compressibility of Ancorbraze 72
Compaction Pressure (tsi)
35
40
45
0.5% Acrawax C
0.5% Acrawax C+3% Fluxing Agent
0.5% Acrawax C+5% Fluxing Agent
50
Green Strength of Ancorbraze 72
55
5.40
5.30
Green Strength (MPa)
Green Density (g/cm3)
800
5
5.20
5.10
5.00
4.90
700
600
4
500
3
400
300
2
200
1
4.80
Green Strength (psi)
Key:
100
0
4.70
350
415
480
550
620
690
860
Compaction Pressure (MPa)
NORTH AMERICA Cinnaminson, NJ: +1-856-829-2220, tim.hale@hoeganaes.com
EUROPE Meerbusch, Germany: +49-2132-6598-20, klaus.vossen@hoeganaes.com
4.7
4.8
4.9
5.0
5.1
5.2
5.3
5.4
5.5
Green Density (g/cm3)
ASIA Seoul, Korea: +82-2-3486-4471, jongsik.na@hoeganaes.com
Pudong Shanghai, China: +86-21-2037-3950, oliver.he@hoeganaes.com
0715-ANCORBRAZE 72-DASP-2
Data Sheet
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Key Design Benefits:
• Ancorbraze 72 can be tailored to meet each customer’s requirements. For example, it can be utilized in the
"As-atomized" form, or blended with a fluxing agent, depending upon the specific sintering conditions.
• Ancorbraze 72 is primarily utilized in a powder form, which facilitates ease of use, and enhances lot-to-lot
consistency.
• Sinterbrazing can build mechanical strength into assemblies by utilizing overlaps, interlocks and flanges.
• P/M technology provides the ability to design parts with stand-off projections, and knurled diameters, channels,
and chamfers to assist material flow. All of which can optimize braze performance.
Key Processing Considerations
• To ensure optimal metal flow into a joint, it is important to reduce oxides during the sintering cycle. Therefore,
oil, dirt or free graphite on the surface may result in a less than optimal results.
• During the sinterbraze cycle, it is imperative to maintain uniform part temperature.
• It is important to recognize:
The joint fill is related to capillary action and surface tension.
Gap distance influences joint strength. Optimum gap distance for PM is typically 0.05–0.15 mm
• When designing a braze joint, it is necessary to consider the thermal expansion of the base materials utilized
to maintain proper gap distance.
• It is necessary to utilize a sufficient amount of filler metal, as well as position the filler on shoulders, ledges or
access hole for security and to maximize flow over the entire joint surface.
• Filler material should be placed on the thicker, slower heating component to ensure complete melting and flow
toward thinner member.
Key Function / Requirements of Flux Agents:
• Incorporation of a fluxing agent enhances the sinterbond quality for specialized applications.
• Fluxing agents promote wetting, and support heat transfer, which enhances the "robustness" of the process.
• "Fluxed" brazing alloys tend to be less affected by natural processing variability — primarily variations in
sintering temperature and atmospheres.
• The flux for Hoeganaes Corporation premixes has an active
range of 100˚F below solidus — (1550˚F/ 843˚C), and
200˚F above liquidus — (2000˚F/ 1093˚C) of the filler.
• Residual flux should be removed by tumbling or equivalent.
The information provided is general in nature, please contact your Hoeganaes Corporation representative to discuss your specific application and needs. Copyright 2015 Hoeganaes Corporation.
NORTH AMERICA Cinnaminson, NJ: +1-856-829-2220, tim.hale@hoeganaes.com
EUROPE Meerbusch, Germany: +49-2132-6598-20, klaus.vossen@hoeganaes.com
ASIA Seoul, Korea: +82-2-3486-4471, jongsik.na@hoeganaes.com
Pudong Shanghai, China: +86-21-2037-3950, oliver.he@hoeganaes.com