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In
Response to global environmental demand for lead-free products,
P. Kay offers standard and IPC recomended lead-free alloys. Alternative
lead-free alloys are also available.
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LEAD-FREE SOLDER ALLOYS
Composition and Temperature Characteristics
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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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Sn99.3Cu3
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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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1. 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. 2. Sn95Sb5 has a nominal antimony (Sb) mass percentage of 5.0% and an allowable antimony percentable range of 4.0% to 6.0%. 3. 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. |
