American Fairfield Inc.
Brazing Alloys Containing Phosphorous
Brazing Alloys Containing Phosphorous
Brazing alloys containing phosphorus are a popular choice in the industry due to their excellent fluidity, low melting point, and high ductility. Prince & Izant offers a range of copper and silver-based brazing alloys containing phosphorus, including:
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Phoscopper 0 Technical Data
Phoscopper 0 is a copper rich, intermediate temperature, brazing filler metal that is free flowing. This alloy is extremely fluid when heated rapidly to its flow point and will penetrate joints with very little clearance. Phoscopper 0 can withstand moderate vibration and is not very ductile. Best results are obtained with joint clearances of 0.001in-0.003in. (0.025mm – 0.075mm). Phoscopper 0 liquates (separates into high and low melting constituents) if heated slowly through its melting range. The self-fluxing property of Phoscopper 0 is effective on copper only. Copper base alloys, such as brass or bronze, may be brazed with the use of flux. Phoscopper 0 should not be used on ferrous metals or nickel base alloys, since the phosphorus produces brittle iron or nickel phosphides at the joint interface.
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Specifications
- Brazing Temperature Range High: 1560 F / 849 C
- Brazing Temperature Range Low: 1510 F / 821 C
- Liquidus: 1460 F / 793 C
- Solidus: 1310 F / 710 C
- Cu: 92.75%
- P: 7.25%
Properties of Brazed Joints
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal. Joints made with Phoscopper 0 ae entirely satisfactory on copper and copper alloys if good fit-up and adequate shear area are maintained. If poor fit-up prevails, or shear area is marginal, a lower phosphorus content silver-copper-phosphorus filler metal may be preferred.
The corrosion resistance of Phoscopper 0 is comparable to that of copper except when exposed to sulfur compounds and sulfur-containing gas or oil, especially at elevated temperatures. Under this conditions Phoscopper 0 undergoes progressive corrosive deterioration, and should not be used.
Forms:
Wire, powder and paste
NOTES
Phoscopper 0 is not suitable for larger gaps and should be used only where good fitup can be maintained.
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Silverphos 15 Technical Data
Silverphos 15 is a copper rich, filler metal that is self-fluxing on copper by virtue of its phosphorus content. The self-fluxing property of this filler metals is effective on copper only. With copper-base alloys, such as brass or bronze, the joints should be fluxed. Silverphos 15 should not be used on nickel-base and iron-base alloys, as the phosphorus reacts with the nickel or iron to form brittle compounds at the interface of the joints.
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More Data
Silverphos 15 has a strong tendency to liquate (separation into low and high melting constituents) if heated slowly through its melting range, as normally occurs in furnace brazing. The results in leaving a “skull” of un-melted alloy behind may objectionable from the standpoint of appearance. In furnace brazing it is preferable to pre-place the alloys inside the joint where the skull is not visible.
Normally the corrosion resistance of Silverphos 15 is of the same order as copper, but under certain conditions it may corrode more rapidly. Silverphos 15 should not be used where the joints are exposed to sulfur compounds, especially in gasses or oils at temperatures above normal room temperature. As the corrosion by sulfur is cumulative, even very small percentages will eventually cause failure of the joint by disintegration. Exposure to pressured steam can also result in accelerated corrosion.
Specifications
- Brazing Temperature Range High: 1575 F / 857 C
- Brazing Temperature Range Low: 1525 F / 829 C
- Liquidus: 1475 F / 802 C
- Solidus: 1190 F / 643 C
- Cu: 80%
- Ag: 15%
- P: 5%
Properties of Brazed Joints
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal.
Forms:
Wire, engineered preforms, specialty preforms per customer specification, powder and paste
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Silverphos 18 Technical Data
Silverphos 18 is a ternary eutectic, low temperature brazing filler metal that is free flowing and self-fluxing on copper and some high copper and copper alloys by virtue of its phosphorus content. Brasses and most bronzes require the use of a flux for good wetting. This alloy becomes extremely fluid above its melting point. With most joint designs a clearance of 0.001in. to 0.003in. (0.025mm – 0.075mm) is desirable. Silverphos 18 should not be used on ferrous metals or nickel base alloys, since the phosphorus diffuses and produces brittle iron or nickel phosphides at the joint interface.
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More Data
Silverphos 15 has a strong tendency to liquate (separation into low and high melting constituents) if heated slowly through its melting range, as normally occurs in furnace brazing. The results in leaving a “skull” of un-melted alloy behind may objectionable from the standpoint of appearance. In furnace brazing it is preferable to pre-place the alloys inside the joint where the skull is not visible.
Normally the corrosion resistance of Silverphos 15 is of the same order as copper, but under certain conditions it may corrode more rapidly. Silverphos 15 should not be used where the joints are exposed to sulfur compounds, especially in gasses or oils at temperatures above normal room temperature. As the corrosion by sulfur is cumulative, even very small percentages will eventually cause failure of the joint by disintegration. Exposure to pressured steam can also result in accelerated corrosion.
Specifications
- Brazing Temperature Range High: 1330 F / 721 C
- Brazing Temperature Range Low: 1280 F / 693 C
- Liquidus: 1230 F / 666 C
- Solidus: 1190 F / 643 C
- Cu: 75.75%
- Ag: 18%
- P: 6.25%
Properties of Brazed Joints
The properties of a brazed joint are depended upon numerous factors including base metal properties, joint design metallurgical interaction between the base metal and the filler metal. Joints made with Silverphos 18 are entirely satisfactory on copper and soft copper alloys if good fit-up and adequate shear area are maintained. If poor fit-up prevails, or shear area is marginal, a lower phosphorus content silver-copper-phosphorus alloy may be preferred, particularly if the joints are to be subjected to impact or vibration in service.
The corrosion resistance of Silverphos 18 is comparable to that of copper except when exposed to Sulphur-containing compounds, especially at elevated temperature. Under these conditions, Silverphos 18 undergoes progressive deterioration. Exposure to pressurized steam can result in accelerated corrosion.
Forms:
Wire, strip, limited engineered preforms, limited specialty preforms per customer specification, powder and paste.
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Silverphos 2 Technical Data
Silverphos 2 is a copper-rich, intermediate temperature, brazing filler metal that is free flowing and self-fluxing on copper by virtue of its phosphorus content. This alloy is extremely fluid when heated rapidly to its flow point and will penetrate joints with very little clearance. Best results are obtained with joint clearances of 0.001in. – 0.003in. (0.025mm – 0.075mm). Silverphos 2 liquates (separates into high and low melting constituents) if heated slowly through its melting range. The self-fluxing property of Silverphos 2 is effective on copper only. Copper base alloys, such as brass or bronze, may be brazed with Silverphos 2 but cannot be used on ferrous metals or nickel base alloys, cince the phosphorus produces brittle iron or nickel phosphorus at the joint interface.
Collapsible content
Specifications
- Brazing Temperature Range High: 1550 F / 843 C
- Brazing Temperature Range Low: 1500 F / 816 C
- Liquidus: 1450 F / 788 C
- Solidus: 1190 F / 643 C
- Cu: 91%
- P: 7%
- Ag: 2%
Properties of Brazed Joints
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal. Joints made with Silverphos 2 are entirely satisfactory on copper and soft copper alloys if good fit-up and adequate shear area are maintained. If poor fit-up prevails, or shear area is marginal, a lower phosphorus content silver-copper-phosphorus alloy may be preferred, particularly if the joints are to be subjected to impact or vibration in service.
Forms:
Wire, rod, limited engineered preforms, limited specialty preforms per customer specification, powder and paste
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Silverphos 5 Technical Data
Silverphos 5 is a copper rich, filler metal that is self-fluxing on copper by virtue of its phosphorus content. The self-fluxing property of this filler metals is effective on copper only. With copper-base alloys, such as brass or bronze, the joints should be fluxed. Silverphos 5 should not be used on nickel-base and iron-base alloys, as the phosphorus reacts with the nickel or iron to form brittle compounds at the interface of the joints. Silverphos 5, because of its higher phosphorus content, is more when heated rapidly to its flow point. Silverphos has less tendency to form large fillets or to fill poorly fitted joints.
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More Data
Silverphos has a strong tendency to liquate (separation into low and high melting constituents) if heated slowly through its melting range, as normally occurs in furnace brazing. The results in leaving a “skull” of un-melted alloy behind may objectionable from the standpoint of appearance. In furnace brazing it is preferable to pre-place the alloys inside the joint where the skull is not visible.
Normally, the corrosion resistance of Silverphos 5 is of the same order as copper, but under certain conditions may corrode more rapidly. Silverphos 5 should not be used where the joints are exposed to sulfur compounds, especially in gasses or oils at temperatures above normal room temperature. As the corrosion by sulfur is cumulative, even very small percentages will eventually cause failure of the joint disintegration. Exposure to pressured steam can also result in accelerated corrosion.
Specifications
- Brazing Temperature Range High: 1595 F / 868 C
- Brazing Temperature Range Low: 1545 F / 841 C
- Liquidus: 1495 F / 813 C
- Solidus: 1190 F / 643 C
- Cu: 89%
- P: 6%
- Ag: 5%
Properties of Brazed Joints
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal.
Forms:
Wire, engineered preforms, specialty preforms per customer specification, powder and paste
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Silverphos 6HP Technical Data
Silverphos 6HP is a copper-rich, intermediate temperature, brazing filler metal
Collapsible content
Specifications
- Brazing Temperature Range High: 1425 F / 774 C
- Brazing Temperature Range Low: 1375 F / 746 C
- Liquidus: 1325 F / 718 C
- Solidus: 1190 F / 643 C
- Cu: 86.75%
- P: 7.25%
- Ag: 6%
Properties of Brazed Joints
The properties of a brazed joint are dependent upon numerous factors including base metal properties, joint design, metallurgical interaction between the base metal and the filler metal.
Forms:
Wire, strip, limited engineered preforms, limited specialty preforms per customer specification, powder and paste.
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Cu-P-Ag Brazing Alloys: These alloys contain copper, phosphorus, and silver as the primary components and offer excellent fluidity and corrosion resistance in applications such as air conditioning and refrigeration.
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Cu-P Brazing Alloys: These alloys contain copper and phosphorus as the primary components, and they have a lower melting temperature than most other brazing alloys, making them an ideal choice for joining copper, brass, and bronze materials.
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Ag-Cu-P Brazing Alloys: These alloys contain silver, copper, and phosphorus as the primary components and are suitable for joining copper, brass, and bronze materials.
Brazing alloys containing phosphorus are an excellent choice for various industrial applications due to their unique properties. Prince & Izant offers a range of high-quality phosphorus-containing brazing alloys that can be customized to specific customer requirements.