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In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. (For more information: 12 Tables of Code ) Name of Standards Organization: Bureau of Indian Standards (BIS) Division Name: Metallurgical Engineering Section Name: Copper and Copper Alloys (MTD 8) Designator of Legally Binding Document: IS 4667-4 Title of Legally Binding Document: Chemical Analysis of Silver-Copper Brazing Alloys, Part 4: Determination of Silver, Copper, Cadmium and Zinc -Electolytic Method Number of Amendments: 1 Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New --Jawaharlal Nehru Invent a new India using knowledge. --Satyanarayan Gangaram Pitroda

In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. (For more information: 12 Tables of Code ) Name of Standards Organization: Bureau of Indian Standards (BIS) Division Name: Metallurgical Engineering Section Name: Copper and Copper Alloys (MTD 8) Designator of Legally Binding Document: IS 4667-1 Title of Legally Binding Document: Methods of chemical analysis of silver copper brazing alloys, Part 1: Analysis for silver and copper Number of Amendments: Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New --Jawaharlal Nehru Invent a new India using knowledge. --Satyanarayan Gangaram Pitroda

An experimental investigation was made to evaluate two nickel base alloys (Nickel-201 and Inconel-718) in three heat treated conditions. These conditions were: (1) annealed; (2) after thermal exposure simulating a braze cycle; and (3) after a thermal exposure simulating a braze cycle plus one operational lifetime of high temperature service. For the Nickel-201, two different braze cycle temperatures were evaluated. A braze cycle utilizing a lower braze temperature resulted in less grain growth for Nickel-201 than the standard braze cycle used for joining Nickel-201 to Inconel-718. It was determined, however, that Nickel-201, was marginal for temperatures investigated due to large grain growth. After the thermal exposures described above, the mechanical properties of Nickel-201 were degraded, whereas similar exposure on Inconel-718 actually strengthened the material compared with the annealed condition. The investigation included tensile tests at both room temperature and elevated temperatures, stress-rupture tests, and metallographic examination.

An experimental investigation was made to evaluate two nickel base alloys (Nickel-201 and Inconel-718) in three heat treated conditions. These conditions were: (1) annealed; (2) after thermal exposure simulating a braze cycle; and (3) after a thermal exposure simulating a braze cycle plus one operational lifetime of high temperature service. For the Nickel-201, two different braze cycle temperatures were evaluated. A braze cycle utilizing a lower braze temperature resulted in less grain growth for Nickel-201 than the standard braze cycle used for joining Nickel-201 to Inconel-718. It was determined, however, that Nickel-201, was marginal for temperatures investigated due to large grain growth. After the thermal exposures described above, the mechanical properties of Nickel-201 were degraded, whereas similar exposure on Inconel-718 actually strengthened the material compared with the annealed condition. The investigation included tensile tests at both room temperature and elevated temperatures, stress-rupture tests, and metallographic examination.

Brazing tests involving titanium honeycomb core joined to various titanium alloy face plates ranging 0.015 to 0.031 in. thickness with an eutectic composition silver-copper brazing alloy, (BT alloy, 72% silver - 28% copper). Heating the BT alloy to its flow point (1435 F) in contact with the various titanium alloys and in the pres ence of an inert atmosphere showed that lithium additions to the brazing alloy and nickeled plating on the titanium alloys was not necessary to achieve good flows and wetability. This was attributed to the ability of titanium to absorb its own oxide at temperatures above 1300 F, a situation in which titanium alloys appear to possess a certain self-cleaning capability in the presence of inert atmospheres and moderate oxide coatings.

Brazing and brazing alloy data with industrial applications - bibliography

The joining of four types of nickel-base materials is described: (1) high-nickel, nonheat-treatable alloys, (2) solid-solution-hardening nickel-base alloys, (3) precipitation-hardening nickel-base alloys, and (4) dispersion-hardening nickel-base alloys. The high-nickel and solid-solution-hardening alloys are widely used in chemical containers and piping. These materials have excellent resistance to corrosion and oxidation, and retain useful strength at elevated temperatures. The precipitation-hardening alloys have good properties at elevated temperature. They are important in many aerospace applications. Dispersion-hardening nickel also is used for elevated-temperature service.

Sloan candidate

A joining process designated weld brazing which combines resistance spot welding and brazing has been developed. Resistance spot welding is used to position and align the parts as well as to establish a suitable faying surface gap for brazing. Fabrication is then completed by capillary flow of the braze alloy into the joint. The process has been used successfully to fabricate Ti-6Al-4V titanium alloy joints using 3003 aluminum braze alloy. Test results obtained on single overlap and hat-stiffened structural specimens show that weld brazed joints are superior in tensile shear, stress rupture, fatigue, and buckling than joint fabricated by spotwelding or brazing. Another attractive feature of the process is that the brazed joints is hermetically sealed by the braze material.

Brazing tests involving commercially pure titanium honeycomb core joined to various titanium alloy face plates (commercially pure, Ti 5Al 2-1/2 Sn, Ti 6Al-4V, nickel plated Ti 5Al-2-1/2 Sn, nickel plated Ti 6Al-4V, and nickel plated Ti 8Mn) with an eutectic composition silver copper brazing alloy (Handy and Harman Co., BT alloy, 72% silver - 28% copper). Heating the BT alloy to its flow point (1435 F) in contact with the various titanium alloys and in the presence of an inert atmosphere showed that lithium additions to the brazing alloy and nickled plating on the titanium alloys was not necessary to achieve good flows and wetability. This was attributed to the ability of titanium to absorb its own oxide at temperatures above 1300 F, a situation in which titanium alloys appear to possess a certain self-cleaning capability in the presence of inert atmosphere and moderate oxide coatings. The erosion of titanium, especially the 0.002 in. thick honeycomb core material was attributed to its solution in the brazing alloy, a character istic which requires use of minimum brazing time to obtain satisfactory joints.

A report of the results of an investigation of 11 braze alloy systems, 8 of which were developed by the Aerojet-General Corporation, as alternatives for the copper-gold commercial alloy (Nicoro) widely used to vacuum braze large rocket engine tubular thrust chambers.

In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. (For more information: 12 Tables of Code ) Name of Standards Organization: Bureau of Indian Standards (BIS) Division Name: Metallurgical Engineering Section Name: Copper and Copper Alloys (MTD 8) Designator of Legally Binding Document: IS 4646-1 Title of Legally Binding Document: Methods of chemical analysis of copper phosphorus brazing alloys, Part 1 Analysis for silver and copper Number of Amendments: Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New --Jawaharlal Nehru Invent a new India using knowledge. --Satyanarayan Gangaram Pitroda

In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. (For more information: 12 Tables of Code ) Name of Legally Binding Document: 4646 (Part 1): Methods of Chemical Analysis of Copper-Phosphorus Brazing Alloys, Part 1: Analysis for Silver and Copper Name of Standards Organization: Bureau of Indian Standards (BIS) LEGALLY BINDING DOCUMENT

In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. (For more information: 12 Tables of Code ) Name of Standards Organization: Bureau of Indian Standards (BIS) Division Name: Metallurgical Engineering Section Name: Lead, Zinc, Cadmium, Tin, Antimony and their Alloys (MTD 9) Designator of Legally Binding Document: IS 4354-1 Title of Legally Binding Document: Methods of chemical analysis of magnesium, aluminium brazing alloys, Part 1 Analysis of aluminium, manganese, zinc and silicon Number of Amendments: Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New --Jawaharlal Nehru Invent a new India using knowledge. --Satyanarayan Gangaram Pitroda

In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. (For more information: 12 Tables of Code ) Name of Standards Organization: Bureau of Indian Standards (BIS) Division Name: Metallurgical Engineering Section Name: Copper and Copper Alloys (MTD 8) Designator of Legally Binding Document: IS 4667-2 Title of Legally Binding Document: Methods of chemical analysis of silver copper brazing alloys, Part 2: Determination of silver, copper and tin Number of Amendments: Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New --Jawaharlal Nehru Invent a new India using knowledge. --Satyanarayan Gangaram Pitroda

In order to promote public education and public safety, equal justice for all, a better informed citizenry, the rule of law, world trade and world peace, this legal document is hereby made available on a noncommercial basis, as it is the right of all humans to know and speak the laws that govern them. (For more information: 12 Tables of Code ) Name of Standards Organization: Bureau of Indian Standards (BIS) Division Name: Metallurgical Engineering Section Name: Copper and Copper Alloys (MTD 8) Designator of Legally Binding Document: IS 4548-1 Title of Legally Binding Document: Methods of chemical analysis of copper gold brazing alloys, Part 1: Analysis of gold and copper Number of Amendments: Equivalence: Superceding: Superceded by: LEGALLY BINDING DOCUMENT Step Out From the Old to the New --Jawaharlal Nehru Invent a new India using knowledge. --Satyanarayan Gangaram Pitroda