SOFT-SOLDERING ALLOYS

Alloys based on Tin for Soft-Soldering.
Lead bearing alloys have particular Health and Safety limitations in applications and uses.
Lead-free alloys, compliant to RoHS regulation, are available.
Available as ingots, bars, sticks, wires and flux-cored wires.
Some alloys are also available in paste: see Powders & Pastes.
Flux cored wires are available with different cores for various applications, as follows:

SN1 EN 29454-1 3.1.1 For Stainless Steel
SN35 EN 29454-1 2.1.2 For Aluminium
SN6 EN 29454-1 2.1.3 For Electromechanics
SN61 EN 29454-1 2.1.2 General Use
SN7 EN 29454-1 1.1.2 Electrical Engineering
SN71 EN 29454-1 1.1.3 For Electronics – NO CLEAN
SN72 EN 29454-1 1.1.1 Colophony

Code Composition % Melting Range SOL-LIQ Standard
Sn Pb Ag Cu Sb Zn Cd °C ISO 9453 EN 29453

Tin bearing alloys

Sn100 99.9 232

Tin-Copper alloys

SnCu97/3 97 3 227-310 No. 402 S-Sn97Cu3
Sn99Cu1 99,3 0,7 227 No. 401 S-Sn99Cu1

Tin-Silver alloys

Ag2Sn 98 2 221-225
Ag3,5Sn 96,5 3.5 221 No. 703 S-Sn97Ag3
Ag5Sn 95 5 221-235 No. 704
Ag10Sn 90 10 221-300

Tin-Silver-Copper alloys

Ag1SnCu4 95,6 0,4 4 225-258
Ag3SnCu0,5 96,5 3 0,5 217-220 No. 711
Sn99Cu1Ag 99 0,3 0,7 217-227

Tin-Silver-Lead alloys

Ag1,4SnPb 63 35,6 1.4 178
Ag1,5SnPb 5 93,5 1,5 296-301

Tin-Antimony alloys

SnSb95/5 95 5 230-240 No. 201 S-Sn95Sb5

Tin-Lead alloys

SnPb80/20 80 20 183-205
SnPb63/37 63 37 183 No. 101 S-Sn63Pb37
SnPb60/40 60 40 183-190 No. 103 S-Sn60Pb40
SnPb50/50 50 50 183-215 No. 111 S-Pb50Sn50
SnPb40/60 40 60 183-235 No. 114 S-Pb60Sn40
SnPb33/67 33 67 183-242
SnPb30/70 30 70 183-255 No. 116 S-Pb70Sn30
SnPb8/92 8 92 280-305 S-Pb92Sn8

Tin-Lead-Copper alloys

Sn60Pb38Cu2 60 38 2 183-190 No. 161 S-Sn60Pb38Cu2

Tin-Zinc alloys

SnZn80/20 80 20 200-288

Lead

Pb100 99,9 327

Make-up
Cast ingots, bars and sticks
Solid Wires Ø: 0,5 ÷ 3 mm
Flux-cored wires Ø: 0,8 ÷ 3 mm
Strips
Powder and Paste
Rings
Preforms from Wire and from Strip