Density, specific heat, melting temperature hard solder
Electrovek-steel company offers to purchase at an affordable price solid solders based on silver, copper and zinc. The supplier ensures timely delivery of products to the address specified by the consumer.
Applicability of solid solders
Soldering with solid propolis, which contains predominantly copper, is used in tool manufacture — for attaching carbide inserts to the steel base of the cutting tool for machining, or cut-off knives for cold-pressing machines. For these cases, the melting point of the solder should roughly correspond to the hardening temperature of the steel product. Heating of the instrument is usually performed in salt baths. If they are not available, soldering with ferroalloys is used.
The main brands of refractory solders are self-fluxing solders GFC or 6MM, the supply of which is in the form of plates, chips or powder.
The composition and properties of solid refractory solders are indicated in the table:
|Brand of solder||Si,%||Mn,%||Ni,%||Zn,%||Fe,%||Cu,%||B,%||Mo,%||Cr,%||Melting point, 0 С||Shear strength, MPa|
|GFK||3… 4||5… 6||4… 5||6… 8||5… 7||Ost.||-||-||-||935||400… 460|
|6MM||6… 8||-||Ost.||-||3… 5||5… 15||0,2… 0,5||10… 15||8… 10||1150… 1200||500… 550|
Standard silver-containing solders are also used, which are supplied in accordance with GOST 8190. The most commonly used are:
Solders PSr 72 and PSr 70, which are used for brazing copper, brass and silver. The main advantage of these alloys is the preservation of the high electrical conductivity of the soldered joint;
Solder PSr 50, is used for the same purposes, for soldering steel, copper and its alloys;
Solder PSr 65, which is used for soldering steel tool parts, mainly for band saw blades and similar products;
Solders PSr 45 and PSr 25, whose field of application is the joining of parts that work in a humid environment, as well as with increased shocks and vibrations. The solder of the grade PSr 45 melts at a lower temperature (which reduces the risk of overheating of the blanks to be joined), and also gives the soldered seam higher mechanical performance.
Buy an affordable price of solid refractory solder offers the company Elektrovek-steel. The supplier guarantees the timely delivery of products to the address specified by the customer.
The physical properties of solid solders are given below:
Chemical composition and physical and mechanical properties of silver brazing alloys
|Brand of solder||Density, kg / m³||Crystallization temperature, ° С||Specific electrical resistance, μOhm • m||Limit of mechanical tensile strength, MPa|
Company Electrovek-steel offers to buy solid refractory solders with any assortment and volume. The supplier guarantees the timely delivery of products to the address specified by the customer.