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LEAD
FREE SOLDER
In response
to global environmental demand for lead-free products
including lead free
solder, P. Kay offers standard and IPC recomended
lead-free alloys. Alternative lead-free alloys are also
available.
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PURETRONIX SOLDER PURITY LEVELS
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Alloy Compostion
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Celsius
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Fahrenheit
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SOL
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LIQ
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SOL
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LIQ
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In52Sn48
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118
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e
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244.4
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e
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Sn42Bi58
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138
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e
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280.4
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e
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Sn95.5Ag3.8Cu0.7
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217
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e
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422.6
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e
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Sn95.8Ag3.5Cu0.7
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217
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e
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422.6
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e
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Sn95Ag4Cd1
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216
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219
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420.8
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426.2
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Sn95Ag5
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221
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245
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429.8
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473.0
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Sn95Sb5
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235
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240
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455.0
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464.0
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Sn96Ag2.5Cu0.5Bi1
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214
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218
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417.2
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424.4
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Sn96.3Ag2.5Cu0.7Sb0.5
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210
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216
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410.0
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420.8
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Sn96.3Ag3.7
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221
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e
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429.8
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e
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Sn96.4Ag3.2Cu0.4
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217
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e
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422.6
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e
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Sn96.5Ag3.5
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221
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e
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429.8
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e
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Sn97Cu3
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227
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300
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440.6
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572.0
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Sn99.3Cu0.7
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227
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e
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440.6
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e
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Sn99.9
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232
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mp
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449.6
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mp
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-
The Solidus (SOL) and Liquidus LIQ) temperature values
are provided for information only and are not intended
to be a requirement in the formulation of the alloys.
In the "LIQ" columns, an "e" indicated
eutectic alloys and an "mp" indicated the
tabulated solidus temperature represents the melting
point for the elements. Although efforts have been
made to document the correct solidus and liquidus
temperatures for each alloy, users of this standard
are advised to verify these temperature values before
use.
- Sn95Sb5
has a nominal antimony (Sb) mass percentage of 5.0%
and an allowable antimony percentable range of 4.0%
to 6.0%.
- Sn99.9
is included in this standard for use in replenishing
tin in wave soldering baths and is NOT suitable for
use as a stand-alone solder because of potential performance
and reliability problems.
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