SOFT SOLDERING

We are a family business which was established 30 years ago and has been based on fundamental shared values inculcated by our founder Mr. José Luis Senra Abadín.

Our most important goals are the development, production and distribution of non-ferrous alloys, mainly tin based, for different sectors as the electronics, antifriction, plumbing & heating and industrial field.

In keeping up with the entrepreneurial spirit of our founder, we carry out a constant innovation in all our areas, counting for this purpose with a group of responsible, involved and committed professionals who have a high tea-mworking capacity and a shared goal: customer satisfaction.

Currently we manufacture alloys for customers in more than 40 different countries, with verified quality due to the outstanding work of our staff who share a high level of training and experience.

SOFT SOLDERING

HARD SOLDERING

ACCESSORIES

Aenor rangeGolden rangePlatinum rangeSilver rangeBrusol rangeLead Free rangeTin-Lead rangeFlux

Copper – Phosphorus alloysCopper – Silver alloysSpecial alloys – Aluminium/BrassFlux

StearinSponges and brushesProtection blanket

The flexibility in our production and our commitment to quality are our best introduction and explains our recent internationalisation.

SENRA GROUPYOUR SN BRAND

4 5

Sn 97%

Sn 96.5%

Sn 96%

PLATINUM RANGE / TIN – INDIUM ALLOYS

AENOR RANGE / CERTIFIED ALLOYS GOLDEN RANGE / TIN – SILVER ALLOYS

Alloy: 402 Cu 3

Sn 95%

Sn 94%

Sn 92%

SOFT SOLDERING

The Aenor alloy range is recommended for use in sanitary, heating and low-pressure gas sanitary facilities.These alloys are approved by the Aenor certificate.Recommended products for sanitary facilities up to a maximum temperature of 110 °C.

The contribution of Indium to silver alloys provides a lower melting point and improves the mechanical resistance.Recommended products for sanitary facilities up to a maximum temperature of 110 °C.

SOFT SOLDERING

Alloy: 704

6 Indium

6%

8 Indium

8%

Sn 93.85%

Sn 91,85%

Alloy: 702

Alloy: 703

SOFT SOLDERING

These alloys with a higher silver content provide greater fluidity and mechanical resistance in soft soldering products. They are ideal for the copper soldering of drinking water facilities, heating and low-pressure gas installations.Recommended products for sanitary facilities up to a maximum temperature of 110 °C.

Melting temperature227 - 310 ºCNormISO 9453Format100g, 200g, 250g, 500g, 1000g. Diameter0.3mm - 8.00mm.

Melting temperature221 - 224 ºC NormISO 9453Format100g, 200g, 250g, 500g, 1000g. Diameter0.3mm - 8.00mm.

Melting temperature221ºCNormISO 9453Format100g, 200g, 250g, 500g, 1000g. Diameter0.3mm - 8.00mm.


Melting temperature 221 - 260 ºCNorm CERTIFIEDFormat 100g, 200g, 250g, 500g, 1000g. Diameter 0.3mm - 8.00mm.




Ag 3.5

Ag 4

Ag 5

Ag 6

Ag 8

Ag 6In 0.15

Ag 8In 0,15

6 7

Sn 95%

SOFT SOLDERING

SILVER RANGE / TIN SILVER ALLOYS SENRA SILVER 3.5 - 6 – 8The Silver range includes tin – based alloys with silver and copper according to the norm ISO 9453. The contribution of silver improves the mechanical resistance and fluidity of the soldering, which implies an improvement on the Brusol range.Recommended products for sanitary facilities up to a maximum temperature of 110 °C.

6

SOFT SOLDERING

Alloy: 401

Alloy: 401Alloy: 502

Alloy: 503

Alloy: 711 Sn 99%Alloy: 501

Sn 92%

Sn 96.5%

BRUSOL RANGE / TIN – COPPER ALLOYSBRUSOL type 3.5 – 6 – 8

The Brusol range includes alloys with a low melting point. Recommended for use in sanitary, heating and low-pressure gas sanitary facilities, it is also recommended for copper pipe soldering.Recommended products for sanitary facilities up to a maximum temperature of 110 °C.





Cu 4Ag 1

Cu 6

Cu 0.5

Ag 2

Ag 3

Sn 99.3%


Cu 0.7

Ag 0.3Cu 0.7

8 9

The Lead-Free range includes alloys that were designed for the international market. All alloys follow international standards as ASTM B-32, American standard for plumbing, or the ASTM B-23 for babbits.Our experience enables us to design alloys according to our customers’ needs or different international standards adapting ourselves to the legislation of each country. Designs can be personalized according to customer requirements.

LEAD FREE RANGE

SOFT SOLDERING

Sn 95%SN 95

Sn 99.3%

Sn 97%

SN 99Melting temperature227 ºCNormISO 9453Format100g, 200g, 250g, 500g, 1000g. Diameter0.3mm - 8.00mm.


Melting temperature233 - 240 ºCNormASTM B32Format100g, 200g, 250g, 500g, 1000g. Diameter0.3mm - 8.00mm.

SN 97

TIN LEAD RANGE SnPbThe Tin – Lead range is manufactured according to the standard ISO 9453, and there are appropriate materials for those solderings which require a low melting temperature, as for example zinc ribbon, gutters, reparations of lead pipes, lead ribbon, etc.

Format range

Weights 100g, 250g, 500g, 800g, 1000g.

Applications: Industrial / Gutter / Electro-mechanics / Automotive sector

• Solid solder wire: Ø0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.5mm, 2mm, 3mm, 4mm, 6mm, 8mm• Flux-cored wire: Ø0.3mm, 0.5mm, 0.8mm, 1.0mm, 1.5mm, 2mm, 3mm, 4mm, 6mm, 8mm• Round rod: 3mm, 4mm, 6mm, 8mm• Bar / Ingot

Alloy Nominal composition Melting temperatureSn Pb

Norm

SENRA30SENRA33SENRA35SENRA40SENRA50SENRA60SENRA63

30%33%35%40%50%60%63%

70%67%65%60% 50% 40% 37%

183 - 255ºC183 - 250ºC183 - 245ºC183 - 238ºC183 - 215ºC183 - 190ºC183°C

ISO9453ISO9453ISO9453ISO9453ISO9453ISO9453ISO9453

Cu 0.7

Cu 3

Sb 5

Just like the tin soldering, we manufacture alloys with lead according to international market requirements. Our experience enables us to design alloys according to our customers’ needs or different international standards adapting ourselves to the legislation of each country. Designs can be personalized by customer’s requirement. Weights can be adapted to different formats: pound, half a pound, quarter of a pound.

SOFT SOLDERING

Weights can be adapted to different formats: pound, half a pound, quarter of a pound.

10 11

FLUX FOR SOFT SOLDERING

Senra Flux Gel100ml

It remains inert in a copper tube up to 24 hours and its special texture avoids spillage. It includes a paintbrush to facilitate the product application.

Senra Liquid Flux100ml

It remains inert in a copper tube up to 24 hours, with a more acid content than the gel flux. It includes a paintbrush to facilitate the product application.

Tin Paste Sn97Cu3 / Sn97Ag3 250g

Lead free solder paste with a paintbrush for its application in copper tube, heating and drinking water facilities. Extremely resilience and great fluidity.

Alloys

S-Sn97Cu3 y S-Sn97Ag3 according to ISO 9453 and flux according to 3.1.1.C EN 29454 – 1 norm.

HARD SOLDERING

COPPER- PHOSPHORUS ALLOYS CuP

All the alloys are available in rod formats of 1.50, 2.00 and 3.00mm, as well as in a wide range of formats such as wire, ribbon or rings, among others.Please, check available measurements.

HARD SOLDERING – COPPER PHOSPHORUSAlloy Nominal Composition Melting temperature ºC

EN 1044 ISO17672Ag Cu P Solides LiquidesSARGET Phos 18SARGET Phos 15SARGET Phos 6SARGET Phos 5SARGET Phos 2SARGET Phos 04SARGET P6SARGET P7SARGET P8

18.0156520.4---

74.98086.78991.793.693.89392.2

7.157,366.366.277.8

645800720815825740890820770

645645645645645710710710710

CP101CP102 -CP104CP105 -CP203CP202CP201

CuP 286CuP 284CuP 283CuP 281CuP 279 - CuP 179CuP 180CuP 182

Norm

Phosphorous rods are alloys with a melting point above 450 °C and they are characterized by being self-cleaners. The use of flux is not required, since phosphorus acts as a flux when soldering.

They have a great mechanical resistance and good thermal and electrical conductivity. They are appropriate for industrial sectors, copper soldering with copper, brass, bronze, electrical applications, refrigeration, gas, air conditioning and heat industry in general.

CuP alloys are not suitable for welding materials containing nickel, iron, including carbon or stainless steel. They are also not suitable situations where there is an exposure to sulphurous gases at high temperatures.

All brazing products are presented under the trade mark SARGET. It is as a brand created within the SENRA group to differentiate brazing from soft soldering products.

12 13

When selecting a CuP brazing material, it is important to consider the relationship between ductility and fluidity which different products provide. In this regard, silver and phosphorus are key elements. Silver is used to improve ductility and phosphorus to increase fluidity. On the other hand, a higher phosphorus content increases fluidity, but reduces ductility.

In applications where optimum mechanical resistance or vibration resistance is required, alloys with low phosphorus content are needed.

CuP ALLOYS APPLICATIONS

Senra Phos 6 / Senra P8 are not recommended for joints that are under strong vibrations, impact force or deformations after welding, due to their low ductility.

Alloys with phosphorus content should not be used to join iron or nickel based materials, because the resulting welds can be brittle.

HARD SOLDERING - COPPER PHOSPHORUSAlloy Properties Working

temperature Use

SARGET Phos 15SARGET Phos 6SARGET Phos 5SARGET Phos 2SARGET P6SARGET P8

High ductility/ Medium fluidityLow ductility / High fluidity Medium ductility / Medium fluidity Medium ductility / Low fluidity Medium ductility / Low fluidity Low ductility / Medium fluidity

700ºC700ºC710ºC740ºC760ºC720ºC

Excellent electrical conduction. HVAC, gas and refrigeration.HVAC, refrigeration, heat exchanger.HVAC and refrigeration.Refrigeration and air conditioning.HVAC, refrigeration, heat exchanger.

These alloys offer the user the main advantages of silver brazing for industrial applications. Among its main features are the fluidity, low melting temperature and resistance. The silver alloys manufactured in Senra are suitable for a wide range of technical solutions, providing a high resistance weld.

Available in rod formats of 1.50, 2.00 and 3.00mm both coated and non-coated, as well as in a wide range of formats such as wire, ribbon or rings, among others. Please, check available measurements.

HARD SOLDERING

SILVER ALLOYS CuAg

HARD SOLDERING – SILVER Alloy Nominal Composition Melting temperature ºC

EN 1044 ISO17672Ag Cu SiZn Sn Solids LiquidsSARGET 560AgSARGET 550AgSARGET 450AgSARGET 440AgSARGET 400AgSARGET 380AgSARGET 340AgSARGET 330AgSARGET 300AgSARGET 250AgSARGET 200SiAgSARGET 180SiAgSARGET 120SiAg

Fluidity range: Maximum =1 /Medium = 2 / Low = 3

56554544403834333025201812

22212730303236

33.5364044

45.7548

----------

0.150.250.15

1722

25.5262828

27.533.53233363640

52

2.5-22

2.5-22---

655660680735710720730740755760810816830

620630640675650660630700665680690784800

Ag 102Ag 103Ag 104Ag 203Ag 105

- Ag 106

- Ag 107Ag 108Ag 206

-Ag 207

Ag 156Ag 155Ag 145Ag 244Ag 140Ag 138Ag 134

- Ag 130Ag 125

--

Ag 212

1111222123323

Norm Fluidity range

14 15

These type of materials are suitable for copper joints, including brass, bronze, nickel-silver, aluminium-bronze, copper-nickel and stainless steel. For silver non-coated brazing products, it is necessary to use the corresponding flux, which can be applied in powder format, coated rods or soldering paste containing flux.

FLUX FOR HARD SOLDERING

CuAg ALLOYS APPLICATIONS

HARD SOLDERING (without Cadmium)Alloy Working

temperature Resistance Use

SARGET 560Ag

SARGET 550Ag

SARGET 450Ag

SARGET 440Ag

SARGET 400Ag

SARGET 380Ag

SARGET 340Ag

SARGET 330Ag

SARGET 300Ag

SARGET 250Ag

SARGET 200SiAg

SARGET 180SiAg

SARGET 120SiAg

630ºC

660ºC

670ºC

730ºC

690ºC

700ºC

710ºC

725ºC

750ºC

780ºC

810ºC

815ºC

825ºC

430Mpa

430Mpa

430Mpa

545Mpa

430Mpa

430Mpa

480Mpa

-

480Mpa

480Mpa

430Mpa

430Mpa

-

Naval Industry / Machinery for Food Sector (Cd-free).

Naval and aerospace Industry General applications, copper, bronze, stainless steel, machinery for food sector (Cd free).Naval Industry ( resistance to dezincification ).

Inox, HVAC and refrigeration, general applications.

Identical properties to Senra 400Ag.Steel, stainless steel, copper, brass, cold, electrical applications. Normally used in coated format.

Excellent fluidity.Steel, copper, accessories, HVAC, refrigeration, automotive sector.

Equivalent applications to Senra 300Ag.

Copper, brass, bronze and refrigeration,

Equivalent to Senra 200SiAg.

-

Special alloys designed to weld both at high temperatures (bronze or brass alloys) and at low temperatures (alloys developed for automotive sector).

Aluminium alloys are recommended for welding when it is necessary to use materials with a low melting point. They are indicated for welding aluminium with copper or aluminium and brass with excellent results.

HARD SOLDERING

HARD SOLDERING - BRASS

HARD SOLDERING -ALUMINIUM

SPECIAL ALLOYS – ALUMINIUM/BRASS

Alloy

Alloy

Nominal Composition

Nominal Composition

Melting temperature °C

Température de fusion °C

EN 1044

EN 1044

ISO17672

ISO17672

Cu

Al

Si

Zn

Zn

Si

Solids

Solides

Liquids

Liquides

SARGET Cu58

SARGET Cu60

SARGET Cu59

SARGET Al12

SARGET Al5

58

60

59

88

95

0,3

0,3

0,3

-

-

40.7

39.7

40.7

12

5

870

895

890

585

630

850

875

870

575

570

-

CU301

-

AL 104

AL 101

-

CU470A

-

AL 112

AL 105

Norm

Norm

STEARIN/SPONGES/PROTECTION BLANKETACCESSORIES

Complementary products and accessories are available to assist in the soldering process:

Stearin: Additive for soft soldering in lead pipe and sheet metal installations.

Sponges and brushes: For external and internal cleaning of the pipe.

Blankets for protection: Fine, flexible and soft fabric, coated with polinitroacrylic fibers that can be adapted to any surface between the piece to be heated and the surface to be protected. It can be used on both sides.

Powder flux with very fine granulometry, with an excellent heat resistance and an optimal wetting action which improves the fluidity and capillarity of the alloy.In accordance with the EN1045 FH10 standard.

Recommended for welding non-ferrous metals and with ternary and quaternary high percentage of silver alloys.

Temperature range 550ºC - 850ºC for silver alloys with a melting temperature up to 850 °C.

Estaños y Soldaduras Senra SLUPl Industrial San Cibrao das Viñas, calle 9 32901 Ourense (Spain)

Phone : + 34 988 25 69 66 / Fax : + 34 988 25 69 68www.gruposenra.com

Documents

SOFT SOLDERING