Sn97Cu3 is a standard soft solder alloy for the EMS area or for soldering of Copper or Copper alloys, which consists of Tin and Copper. This soft solder is referred to in the technical field as SC3 or fitting solder and is one of the most common consumable solders in the field of cable assembly and Copper pipe installation.
Delivery forms
Ingots with and without suspension
Rods type 3K & 4K
Solid and flux-filled wires
Pellets
Sticks®
Other formats or products not listed here may be possible upon request.
Applications
Lead-free soft solder, which has been developed primarily for general use in the following applications and soldering processes.
Copper Pipes- / Sanitary Installations
Iron soldering systems
Air conditioning technology
Plasma and evaporation systems
Hand soldering
Dip tinning
Products
Rods made from Sn97Cu3 (SC3)
9222
pressed
none
without
square cut
Rods
400 mm
11 mm
7 mm
3175
pressed
none
without
square cut
Rods
400 mm
6 mm
4 mm
9216
pressed
none
without
triangular
Rods
400 mm
7 mm
9200
pressed
none
without
circular
Rods
400 mm
4 mm
9199
pressed
none
without
circular
Rods
400 mm
3 mm
9198
pressed
none
without
circular
Rods
400 mm
2 mm
1325
pressed
none
without
triangular
Rods
400 mm
10 mm
The products shown are only a selection from our product range. Please contact us for your desired configuration of Rods from Sn97Cu3 (SC3).
Ingots made from Sn97Cu3 (SC3)
9404
molded
open
with
Ingots Type O
Ingots
485 mm
50 mm
20 mm
9104
molded
open
with
Ingots Type O
Ingots
485 mm
50 mm
20 mm
3043
molded
none
without
Ingot Type H
Ingots
420 mm
115 mm
30 mm
The products shown are only a selection from our product range. Please contact us for your desired configuration of Ingots from Sn97Cu3 (SC3).
Solid solder wire made from Sn97Cu3 (SC3)
2105
2 mm
4,000 g
no
5744
3 mm
4,000 g
no
9245
2.5 mm
4,000 g
no
The products shown are only a selection from our product range. Please contact us for your desired configuration of Solid solder wire from Sn97Cu3 (SC3).
Sticks made from Sn97Cu3 (SC3)
2859
molded
none
without
square cut
Sticks
340 mm
30 mm
20 mm
1324
molded
none
without
triangular
Sticks
400 mm
10 mm
10 mm
The products shown are only a selection from our product range. Please contact us for your desired configuration of Sticks from Sn97Cu3 (SC3).
Studs made from Sn97Cu3 (SC3)
3025
molded
none
without
Studs
Studs
172 mm
71 mm
9195
molded
none
without
Studs
Studs
180 mm
55 mm
The products shown are only a selection from our product range. Please contact us for your desired configuration of Studs from Sn97Cu3 (SC3).
Material properties
| Melting temperature °C | 227-310 |
| Solder wave temperature °C | > 350 |
| Density g/cm³ | 7,3 |
| Hardness HB | 11 |
| Tensile strength N/mm² | 50 at Copper |
| Stretching % | n.s. |
| Specific heat of fusion J/g | n.s. |
| Electrical conductivity µΩcm | n.s. |
This alloy can be stored for at least 48 months if properly stored in a clean and dry environment. For massive formats, further processing is usually possible after the specified storage period has expired, but should be technically checked and approved in advance.
Chemical composition in accordance with ISO 9453
(Data in percent by weight)
| Element | Formular | Composition |
|---|---|---|
| Tin | Sn | Residue |
| Copper | Cu | 2.5-3.5 |
| Antimony | Sb | < 0.1 |
| Bismuth | Bi | < 0.1 |
| Indium | In | < 0.1 |
| Silver | Ag | < 0.1 |
| Lead | Pb | < 0.07 |
| Gold | Au | < 0.05 |
| Arsenic | As | < 0.03 |
| Iron | Fe | < 0.02 |
| Nickel | Ni | < 0.01 |
| Cadmium | Cd | < 0.002 |
| Aluminium | Al | < 0.001 |
| Zinc | Zn | < 0.001 |
The data given in the table is based on the standardisation data from ISO 9453.
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