SENJU SOLDER

Introduction

Lead-Free Initiative

The history of soldering goes back some 5,000 years, but fundamental soldering has always used Sn-Pb series solder that consists of tin and lead. However, lead pollution ground water has been recognized as an environmental problem and complete elimination of the use of lead is called for.

Realizing that protection of our environment is our task in the 21st century, SMIC has earnestly extended our research in this area and developed Lead-Free "ECO SOLDER."

Please contact us for any problem that relates to Lead-Free soldering. We are thoroughly prepared to introduce Lead-Free soldering system as we have a comprehensive technology base and have constructed support systems in various phases with ECO Soldering Solution.

* SMIC, ECO SOLDER, ECO Soldering Solution, ECOtronics and logotypes are trademarks or registered trademarks of Senju Metal Industry Co., Ltd.

JIS Z 3282 / ISO9453: Chemical composition of lead-free solders

Class	Symbol		SMIC Item
Class	1	2	SMIC Item
Sn 96.5 Ag 3 Cu 0.5	Sn 96.5 Ag 3 Cu 0.5	A30C5	M705

Chemical Composition Mass％
Sn	Pb	Sb	Bi	Cu	Au	In	Ag	Al	As	Cd	Fe	Ni	Zn
Remain	0.05 max	0.10 max	0.10 max	0.3 to 0.7	0.05 max	0.10 max	2.8 to 3.2	0.001 max	0.03 max	0.002 max	0.02 max	0.01 max	0.001 max

ECO SOLDER

Lead-Free ECO SOLDER developed by SMIC offers high soldering reliability compared with the Sn-Pb series solder of the past and is available in a wide product lineup
according to the required soldering temperature.E series（antioxident type）and automatic feeding type for solder bath are also available.Product availability may be limited for
certain alloycompositions. Please select the appropriate product from the ECO SOLDER Products Guide below.

ECO SOLDER Products Guide

ECO SOLDER	Alloy composition (wt%)	Temp. (°C)			Form
ECO SOLDER	Alloy composition (wt%)	Solidus line	Peak	Liquidus line	BAR	CORE	BALL	PASTE	PRE FORM
M-series: Solidus line temp. 200 to 250 °C
M705	Sn-3.0Ag-0.5Cu	217	219	220
M30	Sn-3.5Ag	221	223	223
M31	Sn-3.5Ag-0.75Cu	218	219	219
M714	Sn-3.8Ag-0.7Cu	217	219	225
M715	Sn-3.9Ag-0.6Cu	217	219	226
M710	Sn-4.0Ag-0.5Cu	217	219	229
M34	Sn-1.0Ag-0.5Cu	217	219	227
M771	Sn-1.0Ag-0.7Cu	217	219	224
M35	Sn-0.3Ag-0.7Cu	217	219	227
M20	Sn-0.75Cu	227	229	229
M24MT	Sn-0.7Cu-Ni-P-Ge	228	230	230
M24AP	Sn-0.6Cu-Ni-P-Ge	227	228	228
M40	Sn-1.0Ag-0.7Cu-Bi-In	211	222	222
M47	Sn-0.3Ag-0.7Cu-0.5Bi-Ni	216	228	228
M773	Sn-0.7Cu-0.5Bi-Ni	225	229	229
M53	Sn-3.0Ag-3.0Bi-3.0In	198	214	214
M794	Sn-3.4Ag-0.7Cu-3.2Bi-3.0Sb-Ni-x	209	221	221
M731	Sn-3.9Ag-0.6Cu-3.0Sb	221	224	226
M716	Sn-3.5Ag-0.5Bi-8.0In	197	208	214
M10	Sn-5.0Sb	240	243	243
M14	Sn-10Sb	245	248	266
M709	Sn-0.5Ag-6.0Cu	217	226	378
M760	Sn-5.0Cu-0.15Ni	228	229	365
M711	Sn-0.5Ag-4.0Cu	217	226	344
M60	Sn-2.3Ag-Ni-Co	221	222	225
M770	Sn-2Ag-Cu-Ni	218	220	224
M758	Sn-3Ag-3Bi-0.8Cu-Ni	205	215	215
M84	Sn-3.0Ag-0.5Cu-Ni	219	223	324
M85	Sn-0.3Ag-2.0Cu-Ni	218	231	332
M86	Sn-0.3Ag-0.7Cu-Ni	220	232	330
L-series: Solidus line temp. under 200 °C
L20	Sn-58Bi	139	141	141
L23	Sn-57Bi-1.0Ag	138	140	204

- Peak temp. : Max. endothermic reaction point on DSC curve.
- Some alloy compositions may not be available in certain forms with special product size and grade.
- For inquiries regarding alloy compositions not listed above, please contact our sales representative or through our web site