Braze 9-4 Tinless relates to a deformable bronzes and copper alloy, aluminum (8 - 10%), iron (2 - 4%) at a density of 7500 kg / cu. m and the initial melting temperature of 1040 degrees. Not subject to corrosion from the weather and sea water, resistant to organic acids, solutions, salts of sulfuric acid and alkalis. It has high strength and durability that allows the use of bronze Braze 9-4 for the manufacture of gears, valves, nuts, jackscrews, transporters plain bearings and other mechanisms.
Harvesting for the production of these items is a bronze circle Braze 9-4, produced by pressing. GOST 1628 provides for the release of the rod diameter from 16 mm to 160 mm. Circle 9-4 bronze Braze increased precision and diameter respectively allowed to produce 16 - 50 mm 16 - 30 mm. In this circle Braze 9-4 has the following characteristics:
- Tensile strength - 55 kgf / mm2;
- Elongation - 15%
- Brinell hardness (HB) - 110 - 180.
It produces a range of bronze Braze 9-4 as random length pieces:
- From 5 to 40 mm - 2 - 5 m;
- From 40 to 80 mm - 1 - 4 m;
- From 80 to 120 mm - 1 - 3 m;
- Over 120 mm - 0.5 - 2 m.
The parties unmeasured rods allowed the presence of truncated products, but not more than 10% of the batch weight. Thus unacceptable length less than 1 m at a rod diameter of 40 mm and less than 0.5 m at a diameter greater than 40 mm.
Ready for shipment bronze circle must not contain non-metallic inclusions, delaminations and voids have. The curvature of the rod to each meter length should not exceed diameters:
- From 5 to 40 mm - 4.0 mm;
- From 40 to 120 mm - 6.0 mm;
- More than 120 mm - 10 mm.
For delivery circle with a diameter up to 35 mm it is tied in bundles weighing up to 80 kg, but in agreement with consumer packs of weight can be increased up to 500 kg.