Soldering Filler Metals

Sn-Pb Solder Alloys

The Sn-Pb series solders had ever been the most popular solder alloys that showed excellent wettability and reliability. In recent years, it has been replaced by the Pb-free solder alloy due to the toxic of Pb, however, in many special applications, for example, the Aerospace equipments, the automotive electronics, the Sn-Pb solder is still adopted.

HUAZHONG could provide many kinds of Sn-Pb solder alloys with the shape of wire, bar, foil and preformed solder.
We can also provide fusible alloys from 58 degrees to 280 degrees.

Specially, the traditional Sn-Pb eutectic solder wires and solder bar alloy products which showed excellent mechanical properties and wett ability.

Alloy Grade	Melting Range		Resistivity Ω·m㎡/m	Products Status			Recommendation
Alloy Grade	Solidus(℃)	Liquidus(℃)	Resistivity Ω·m㎡/m	Wire	Bar	paste	Recommendation
S-Sn65Pb35	183	186	0.122	Ф0.3-3.0mm	△	---
S-Sn63Pb37	183	183	0.141	Ф0.3-3.0mm	△	y(SMT)	Widely used
S-Sn62Pb36Ag2	179	180	---	Ф0.3-3.0mm	△	y(SMT)
S-Sn60Pb40	183	190	0.145	Ф0.5-3.0mm	△	---	Widely used, economical
S-Sn50Pb50	183	215	0.181	Ф0.8-3.0mm	△	---
S-Sn40Pb60	183	238	0.17	Ф1.0-5.0mm	△	---
S-Sn30Pb70	183	258	0.182	Ф1.2-5.0mm	△	---	economical
S-Sn20Pb80	183	279	0.22	Ф1.5-2.0mm	△	---
S-Sn10Pb90	275	302	---	Ф0.5-3.0mm	△	---
S-Sn8Pb92	308	312	---	Ф0.5-3.0mm	△	---	Used for jewelry

The main material of lead free solder is Tin-silver-copper based alloys, it is now widely used currently, it is the best alternative solder of tin lead solder alloys. it has high-purity raw materials and environmentally friendly flux products,There is no damage to sensitive component and no pungent odor. It meets the requirements of RoHS and REACH.

Lead-Free Solder Alloys

Alloy Grade	Melting Range		Resistivity Ω·m㎡/m	Products Status			Recommendation
Alloy Grade	Solidus(℃)	Liquidus(℃)	Resistivity Ω·m㎡/m	Wire	Bar	paste	Recommendation
S-Sn99Cu0.7Ag0.3	216	228	---	Ф0.5-3.0mm	△	Y(SMT)	For general electronic products
S-Sn99.7Cu0.3	227	227	---	Ф0.5-3.0mm	△	---
S-Sn99.3Cu0.7	227	227	---	Ф0.5-3.0mm	△	---	Widely Used,Economical
S-Sn97Cu3	227	275	---	Ф0.5-3.0mm	△	---
S-Sn97Ag3	221	200	---	Ф0.5-3.0mm	△	---
S-Sn96.5Ag3Cu0.5Ce	217	219	---	Ф0.5-3.0mm	△	Y(SMT)	Widely use for high-end electronic products
S-Sn95.5Ag3.5Cu1	218	218	---	Ф0.5-3.0mm	△	---
S- Bi58Sn42	138	138	---	Ф0.5-3.0mm	△	Y(SMT)	Low melting point
S-Sn95Sb5	234	240	---	Ф0.5-3.0mm	△	Y(SMT)