13.10/2023
POLEMA presented at the“BIOTECHMED” its innovative medical products
11.07/2023
POLEMA at INNOPROM in Ekaterinburg
Powder and grit made from electrolytic chromium
JSC POLEMA produces powders and grit from electrolytic chromium with various chemical compositions and particle size.
Powders and grit are produced through mechanical pulverization of refined electrolytic chromium material of the appropriate purity, with subsequent screening in order to achieve the needed particle size.
Powders made from refined electrolytic chromium are meant for use in manufacturing.
Grit made from refined electrolytic chromium is used as evaporable sources during vacuum application of chromium coatings.
Powder made from high-purity refined electrolytic chromium containing the base element 99.99 % Cr and 99.98 % Cr
Brand |
Cr, % (mass)* |
Admixtures, ppm, maximum | |||||
Total content of metallic admixtures |
C | N | O | S | |||
for fraction 56-280 microns (-50 mesh) |
for fraction 56-160 microns (-100 mesh) |
||||||
MP-ERCr 99,99 | 99,99 min | 100 | 50 | 40 | 120 | 130 | 20 |
MP-ERCr 99,98 | 99,98 min | 200 | 70 | 50 | 140 | 150 | 20 |
*Metallic purity. The mass percentage of Cr is determined as the difference between 100% and the total content of metallic admixtures, determined using the ICP-MS method |
MP – Milled Powder
Particle size: 56-280 microns (-50 mesh), 56-160 (-100 mesh) with base fraction content of at least 93.5%. Other particle sizes are possible based on client request.
Powder of refined electrolytic chromium with a purity of 99.95 % Cr
Brand, fraction | Cr, % (mass) * | Admixtures, ppm, maximum | |||||||||
Al | Fe | Cu | Ni | Si | C | N | O | S | Other | ||
MP-ERCr-1 |
99,95 min | 15 | 150 | 30 | 50 | 100 | 80 | 30 | 120 | 20 | - |
MP-ERCr-1 |
99,95 min | 15 | 200 | 30 | 50 | 100 | 80 | 30 | 200 | 20 | - |
MP-ERCr-4 |
99,95 min | 50 | 200 | 30 | 50 | 150 | 100 | 50 | From 10000 to 30000** | 80 |
P 20 Pb 10 |
*Metallic purity **In MP-ERCr-4 (oxidized) powder, oxygen is not classified among admixtures, and its content in the amounts shown above is set based on individual contracts |
MP – Milled Powder
Powder of low-purity refined electrolytic chromium containing the base element 99.9 % Cr and 99.6 % Cr
Brand | Cr, % (mass.)* | Admixtures, ppm, maximum** | |||||||||
Al | Fe | Cu | Ni | Si | Total content of metallic admixtures | C | N | O | S | ||
MP-ERCr 99,9 | 99,9 min | 70 | 500 | 40 | 100 | 100 | 1000 | 200 | 100 | 350 | 30 |
MP-ERCr 99,6 | 99,6 min | 70 | 1500 | 50 | 100 | 350 | 4000 | 200 | 100 | 1500 | 30 |
*Metallic purity **Admixture norms are shown for powders MP-ERCr 99.9 of the fraction 56-280 microns (-50 mesh) and MP-ERCr 99.6 of the fraction 0-63 microns (-250 mesh). For powders of other fractions, admixtures norms are determined in the specifications |
MP – Milled Powder
Particle size: 56-280 microns (-50 mesh) for the brand MP-ERCr 99.9 with base fraction particle content of at least 85 %; 0-63 microns (-250 mesh) for the brand MP-ERCr 99.6 with base fraction particle content of at least 95 %; other dimensions are possible at the client's request.
Grit from refined electrolytic chromium with a purity of 99.95% Cr and 99.9 % Cr for evaporable sources
Brand | Cr, % (mass.)* | Admixtures, ppm, maximum | |||||||||
Al | Fe | Cu | Ni | Si |
Other admixtures, total** |
C | N | O | S | ||
ERCr 99,95-PM | 99,95 min | 30 | 250 | 30 | 40 | 50 | 100 | 100 | 50 | 200 | 20 |
ERCr 99,9-PM | 99,9 min | 70 | 500 | 40 | 100 | 100 | 190 | 200 | 100 | 350 | 30 |
*Metallic purity **K+Li+Mg+Mn+Mo+Na+V+W |
Grit particle size: from 2.5 to 5.9 mm, with base fraction content of at least 88 %, as well as other sizes based on the client's request.