Designation
| Name |
The value |
| Designation GOST Cyrillic |
ВПр4 |
| Designation GOST Latin |
BPp4 |
| Transliteration |
VPr4 |
| By chemical elements |
ВPr4 |
Description
Solder ВПр4 applies: for soldering of parts and assemblies from high temperature alloys and stainless steels.
Standards
| Name |
Code |
Standards |
| Sheets and strips |
В53 |
OST 1 90082-88 |
Chemical composition
| Standard |
P |
Mn |
Si |
Ni |
Fe |
Cu |
B |
Co |
| OST 1 90082-88 |
0.1-0.2 |
27-30 |
0.8-1.2 |
28-30 |
1-1.5 |
Rest |
0.15-0.25 |
4-6 |
Cu is the basis.
According to OST 1 90082-88 the total content of impurities is not more than 0.50%.
Technological properties
| Name |
The value |
| Macrostructure and pollution |
Surface bands on OST 1 90082-88 should be bright, clean with no bubbles, sunsets, cracks, cavities, metallic and non-metallic inclusions and delaminations, and to meet the standards of VIAM. There may be dents, injections, removalist, prints from the rolls, if in the control the sweep depth of these defects does not display bands for the limit deviation on thickness. Allowed the presence of traces of etching strips of alloys, tint, copper plating, local darkening and stains from water. The edges and ends of the strips of solder should be smooth. Presence of cracks on the edge of edge no deeper than 2 mm. in not more than 10 PCs for one meter length of the strip. |
| Particularities of production of goods |
Band of solders on OST 1 90082-88 supplied in cold-worked condition. |
