The Harris Safety-Silv 5 (SKU: 5520R1) is a copper-phosphorus-silver brazing filler metal designed for the joining of copper and copper-alloy base metals. Formulated with 5% silver, 6% phosphorus, and a copper balance, this alloy meets the AWS A5.8 classification for BCuP-3. The inclusion of silver in the matrix significantly improves the mechanical properties of the joint, specifically ductility and fatigue resistance, compared to BCuP-2 (0% silver) alternatives. This makes it a standard specification for HVAC and refrigeration piping systems where thermal cycling and vibration are operational factors.<\/p>\n
Thermodynamically, Safety-Silv 5 exhibits a solidus temperature of 1190\u00b0F (643\u00b0C) and a liquidus temperature of 1500\u00b0F (816\u00b0C). This 310\u00b0F melting range provides the alloy with a “plastic” or semi-solid state during heating. This characteristic is technically advantageous when dealing with loose fit-ups or non-concentric joints, as it allows the operator to manipulate the alloy to bridge gaps that free-flowing eutectic alloys (like BCuP-5) cannot manage effectively. The alloy has a specific gravity of 8.25 and an electrical conductivity of approximately 9.6% IACS.<\/p>\n
Fluxing Requirements:<\/strong> Due to the phosphorus content, Safety-Silv 5 is self-fluxing on copper base metals; the phosphorus reacts with copper oxides to form a fluid slag, eliminating the need for external flux. However, when brazing brass, bronze, or other copper alloys, a reactive flux such as Stay-Silv\u00ae White or Black is required to dissolve surface oxides and ensure wetting. Warning:<\/strong> This alloy must never be used on ferrous metals (steel, iron) or nickel-based alloys, as the phosphorus will react with iron\/nickel to form brittle intermetallic phosphides, leading to joint embrittlement and failure.<\/p>\n This product is supplied in a 1 lb rigid tube containing 3\/32″ (2.4mm) diameter rods, each 20 inches in length. The packaging ensures moisture protection and physical integrity of the rods during storage and transport.<\/p>\n","protected":false},"excerpt":{"rendered":"Technical Specification: Harris Safety-Silv 5 (BCuP-3) The Harris Safety-Silv 5 (SKU: 5520R1) is a copper-phosphorus-silver brazing filler metal designed for the joining of copper and copper-alloy base metals. Formulated with 5% silver, 6% phosphorus, and a copper balance, this alloy meets the AWS A5.8 classification for BCuP-3. The inclusion of silver in the matrix significantly… View Article<\/a>","protected":false},"featured_media":0,"template":"","meta":{"_acf_changed":false},"product_brand":[],"product_cat":[1966,1959],"product_tag":[],"class_list":{"0":"post-1761555","1":"product","2":"type-product","3":"status-publish","5":"product_cat-silver-wires","6":"product_cat-welding-wires-and-electrodes","7":"pa_diameter-mm-2-4mm","8":"pa_diameter-mm-2-5mm","9":"pa_packaging-description-1-lb-tube-1-lb-tube","10":"pa_packaging-description-1-of-1","11":"pa_silver-content-5-5","12":"pa_silver-content-1315","14":"first","15":"onbackorder","16":"taxable","17":"shipping-taxable","18":"purchasable","19":"product-type-simple"},"acf":[],"_links":{"self":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product\/1761555","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/types\/product"}],"wp:attachment":[{"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/media?parent=1761555"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_brand?post=1761555"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_cat?post=1761555"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/josefgases.com\/stage\/wp-json\/wp\/v2\/product_tag?post=1761555"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}