Lucas Milhaupt Sil-Fos 5 Brazing Alloy
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Lucas Milhaupt Sil-Fos 5 Brazing Alloy

$105.00
$105.00
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Lucas Milhaupt Sil-Fos 5 Brazing Alloy

 

Sil-Fos 5 is a silver-copper-phosphorus alloy for copper-copper brazing but can also be used to join brass with an appropriate flux (e.g. Handy Flux, Ultra Flux). It is a more cost effective Ag-Cu-P alloy, though it does not penetrate deep joints easily.

  • Joins CU to CU (phosphorus serves as flux)
  • Joins CU to Brass (flux is recommended)
  • Lower cost alternative to higher silver content Ag-Cu-P alloys
  • Medium flow
  • Made in USA
Industry Applications:
HVAC/R Refrigerant systems, air conditioning coils, evaporator coils
  • Name: SIL-FOS 5
  • Nominal Composition: Silver 5.00, Copper 89.00, Phosphorous 6.00
  • Liquidus: 1325 °F °, 718 °C
  • Solidus: 1190 °F °, 643 °C
  • Max Recommended Brazing Temperature: 1500 °F, 816 °C
  • Heating Methods: Controlled Atmosphere, Open Air
  • Industry Specifications: AWS: BCuP-3 
  • ISO 17672: CuP 281
  • Part Number - .0500 X .1250 X 20" X 28 Sticks - #95060
Product Name Dimensions Case Quantity OEM Forms
OEM Range
32299 .050"x.125"x5' length coil 6/box Wire Diameter
32302 .050"x.125"x22' length coil 5/box Wire Diameter
95060 .125"x.050"x20" : 28 rods 25 lbs Strip
Thick x Width
95071 .125"x.050"x20" : bulk 25 lbs Wire Diameter
{"id":8319134662829,"title":"Lucas Milhaupt Sil-Fos 5 Brazing Alloy","handle":"lucas-milhaupt-sil-fos-5-brazing-alloy","description":"\u003ch1\u003eLucas Milhaupt \u003cspan\u003eSil-Fos 5 Brazing Alloy\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cdiv class=\"ProductBenefits\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSil-Fos 5 is a silver-copper-phosphorus alloy for copper-copper brazing but can also be used to join brass with an appropriate flux (e.g. Handy Flux, Ultra Flux). It is a more cost effective Ag-Cu-P alloy, though it does not penetrate deep joints easily.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"ProductBenefits TitanBlock\"\u003e\n\u003cul\u003e\n\u003cli\u003eJoins CU to CU (phosphorus serves as flux)\u003c\/li\u003e\n\u003cli\u003eJoins CU to Brass (flux is recommended)\u003c\/li\u003e\n\u003cli\u003eLower cost alternative to higher silver content Ag-Cu-P alloys\u003c\/li\u003e\n\u003cli\u003eMedium flow\u003c\/li\u003e\n\u003cli\u003eMade in USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"IndustryApplications\"\u003e\n\u003cstrong\u003eIndustry Applications:\u003c\/strong\u003e\n\u003cdiv\u003eHVAC\/R Refrigerant systems, air conditioning coils, evaporator coils\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"Row\"\u003e\n\u003cul\u003e\n\u003cli\u003eName: SIL-FOS 5\u003c\/li\u003e\n\u003cli\u003eNominal Composition: Silver 5.00, Copper 89.00, Phosphorous 6.00\u003c\/li\u003e\n\u003cli\u003eLiquidus: 1325 °F °, 718 °C\u003c\/li\u003e\n\u003cli\u003eSolidus: 1190 °F °, 643 °C\u003c\/li\u003e\n\u003cli\u003eMax Recommended Brazing Temperature: 1500 °F, 816 °C\u003c\/li\u003e\n\u003cli\u003eHeating Methods: Controlled Atmosphere, Open Air\u003c\/li\u003e\n\u003cli\u003eIndustry Specifications: AWS: BCuP-3 \u003c\/li\u003e\n\u003cli\u003eISO 17672: CuP 281\u003c\/li\u003e\n\u003cli\u003ePart Number - \u003cstrong\u003e.0500 X .1250 X 20\" X 28 Sticks - #95060\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable data-sheets-baot=\"1\" data-sheets-root=\"1\" border=\"1\" dir=\"ltr\" cellpadding=\"0\" cellspacing=\"0\" xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"901\"\u003e \u003ccol width=\"100\"\u003e \u003ccol width=\"100\"\u003e \u003ccol width=\"100\"\u003e \u003ccol width=\"100\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eCase Quantity\u003c\/td\u003e\n\u003ctd\u003eOEM Forms\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eOEM Range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e32299\u003c\/td\u003e\n\u003ctd\u003e.050\"x.125\"x5' length coil\u003c\/td\u003e\n\u003ctd\u003e6\/box\u003c\/td\u003e\n\u003ctd\u003eWire\u003c\/td\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e32302\u003c\/td\u003e\n\u003ctd\u003e.050\"x.125\"x22' length coil\u003c\/td\u003e\n\u003ctd\u003e5\/box\u003c\/td\u003e\n\u003ctd\u003eWire\u003c\/td\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e95060\u003c\/td\u003e\n\u003ctd\u003e.125\"x.050\"x20\" : 28 rods\u003c\/td\u003e\n\u003ctd\u003e25 lbs\u003c\/td\u003e\n\u003ctd\u003eStrip\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eThick x Width\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e95071\u003c\/td\u003e\n\u003ctd\u003e.125\"x.050\"x20\" : bulk\u003c\/td\u003e\n\u003ctd\u003e25 lbs\u003c\/td\u003e\n\u003ctd\u003eWire\u003c\/td\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e","published_at":"2025-09-17T10:15:08-04:00","created_at":"2025-09-17T10:07:54-04:00","vendor":"Lucas Milhaupt","type":"Silver Solder","tags":["Sil Phos","TEC"],"price":10500,"price_min":10500,"price_max":10500,"available":true,"price_varies":false,"compare_at_price":null,"compare_at_price_min":0,"compare_at_price_max":0,"compare_at_price_varies":false,"variants":[{"id":44919237738669,"title":"Default Title","option1":"Default Title","option2":null,"option3":null,"sku":"LUC-95060","requires_shipping":true,"taxable":true,"featured_image":null,"available":true,"name":"Lucas Milhaupt Sil-Fos 5 Brazing Alloy","public_title":null,"options":["Default Title"],"price":10500,"weight":544,"compare_at_price":null,"inventory_management":"shopify","barcode":null,"requires_selling_plan":false,"selling_plan_allocations":[],"quantity_rule":{"min":1,"max":null,"increment":1}}],"images":["\/\/canadaweldingsupply.com\/cdn\/shop\/files\/LucasSil-Fos595060PS.jpg?v=1758118319","\/\/canadaweldingsupply.com\/cdn\/shop\/products\/LucasMilhauptSIL-FOSLogo.png?v=1758118319"],"featured_image":"\/\/canadaweldingsupply.com\/cdn\/shop\/files\/LucasSil-Fos595060PS.jpg?v=1758118319","options":["Title"],"media":[{"alt":"Lucas Milhaupt Sil-Fos 5 Brazing Alloy","id":29613116719277,"position":1,"preview_image":{"aspect_ratio":1.204,"height":3141,"width":3783,"src":"\/\/canadaweldingsupply.com\/cdn\/shop\/files\/LucasSil-Fos595060PS.jpg?v=1758118319"},"aspect_ratio":1.204,"height":3141,"media_type":"image","src":"\/\/canadaweldingsupply.com\/cdn\/shop\/files\/LucasSil-Fos595060PS.jpg?v=1758118319","width":3783},{"alt":"Lucas Milhaupt Logo","id":7519081758806,"position":2,"preview_image":{"aspect_ratio":2.795,"height":229,"width":640,"src":"\/\/canadaweldingsupply.com\/cdn\/shop\/products\/LucasMilhauptSIL-FOSLogo.png?v=1758118319"},"aspect_ratio":2.795,"height":229,"media_type":"image","src":"\/\/canadaweldingsupply.com\/cdn\/shop\/products\/LucasMilhauptSIL-FOSLogo.png?v=1758118319","width":640}],"requires_selling_plan":false,"selling_plan_groups":[],"content":"\u003ch1\u003eLucas Milhaupt \u003cspan\u003eSil-Fos 5 Brazing Alloy\u003c\/span\u003e\n\u003c\/h1\u003e\n\u003cdiv class=\"ProductBenefits\"\u003e\n\u003cp\u003e \u003c\/p\u003e\n\u003cp\u003e\u003cspan\u003eSil-Fos 5 is a silver-copper-phosphorus alloy for copper-copper brazing but can also be used to join brass with an appropriate flux (e.g. Handy Flux, Ultra Flux). It is a more cost effective Ag-Cu-P alloy, though it does not penetrate deep joints easily.\u003c\/span\u003e\u003c\/p\u003e\n\u003cdiv class=\"ProductBenefits TitanBlock\"\u003e\n\u003cul\u003e\n\u003cli\u003eJoins CU to CU (phosphorus serves as flux)\u003c\/li\u003e\n\u003cli\u003eJoins CU to Brass (flux is recommended)\u003c\/li\u003e\n\u003cli\u003eLower cost alternative to higher silver content Ag-Cu-P alloys\u003c\/li\u003e\n\u003cli\u003eMedium flow\u003c\/li\u003e\n\u003cli\u003eMade in USA\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003cdiv class=\"IndustryApplications\"\u003e\n\u003cstrong\u003eIndustry Applications:\u003c\/strong\u003e\n\u003cdiv\u003eHVAC\/R Refrigerant systems, air conditioning coils, evaporator coils\u003c\/div\u003e\n\u003cdiv\u003e\n\u003cdiv class=\"Row\"\u003e\n\u003cul\u003e\n\u003cli\u003eName: SIL-FOS 5\u003c\/li\u003e\n\u003cli\u003eNominal Composition: Silver 5.00, Copper 89.00, Phosphorous 6.00\u003c\/li\u003e\n\u003cli\u003eLiquidus: 1325 °F °, 718 °C\u003c\/li\u003e\n\u003cli\u003eSolidus: 1190 °F °, 643 °C\u003c\/li\u003e\n\u003cli\u003eMax Recommended Brazing Temperature: 1500 °F, 816 °C\u003c\/li\u003e\n\u003cli\u003eHeating Methods: Controlled Atmosphere, Open Air\u003c\/li\u003e\n\u003cli\u003eIndustry Specifications: AWS: BCuP-3 \u003c\/li\u003e\n\u003cli\u003eISO 17672: CuP 281\u003c\/li\u003e\n\u003cli\u003ePart Number - \u003cstrong\u003e.0500 X .1250 X 20\" X 28 Sticks - #95060\u003c\/strong\u003e\n\u003c\/li\u003e\n\u003c\/ul\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/div\u003e\n\u003ctable data-sheets-baot=\"1\" data-sheets-root=\"1\" border=\"1\" dir=\"ltr\" cellpadding=\"0\" cellspacing=\"0\" xmlns=\"http:\/\/www.w3.org\/1999\/xhtml\"\u003e\n\u003ccolgroup\u003e \u003ccol width=\"901\"\u003e \u003ccol width=\"100\"\u003e \u003ccol width=\"100\"\u003e \u003ccol width=\"100\"\u003e \u003ccol width=\"100\"\u003e \u003c\/colgroup\u003e\n\u003ctbody\u003e\n\u003ctr\u003e\n\u003ctd\u003eProduct Name\u003c\/td\u003e\n\u003ctd\u003eDimensions\u003c\/td\u003e\n\u003ctd\u003eCase Quantity\u003c\/td\u003e\n\u003ctd\u003eOEM Forms\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eOEM Range\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e32299\u003c\/td\u003e\n\u003ctd\u003e.050\"x.125\"x5' length coil\u003c\/td\u003e\n\u003ctd\u003e6\/box\u003c\/td\u003e\n\u003ctd\u003eWire\u003c\/td\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e32302\u003c\/td\u003e\n\u003ctd\u003e.050\"x.125\"x22' length coil\u003c\/td\u003e\n\u003ctd\u003e5\/box\u003c\/td\u003e\n\u003ctd\u003eWire\u003c\/td\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e95060\u003c\/td\u003e\n\u003ctd\u003e.125\"x.050\"x20\" : 28 rods\u003c\/td\u003e\n\u003ctd\u003e25 lbs\u003c\/td\u003e\n\u003ctd\u003eStrip\u003c\/td\u003e\n\u003ctd\u003e\n\u003cdiv\u003e\n\u003cdiv\u003eThick x Width\u003c\/div\u003e\n\u003c\/div\u003e\n\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003ctr\u003e\n\u003ctd\u003e95071\u003c\/td\u003e\n\u003ctd\u003e.125\"x.050\"x20\" : bulk\u003c\/td\u003e\n\u003ctd\u003e25 lbs\u003c\/td\u003e\n\u003ctd\u003eWire\u003c\/td\u003e\n\u003ctd\u003eDiameter\u003c\/td\u003e\n\u003c\/tr\u003e\n\u003c\/tbody\u003e\n\u003c\/table\u003e"}