Surface treatment of precision alloys
Roughness parameter values
Values of roughness height Ra and Rz for specified surface finish classes (in theory - the use of Ra parameter is preferable to the use of Rz parameter).
| Roughness class | Base length l, mm | Ra preferable, μm | Ra allowable, μm | Rz, μm |
| 1 | 8,0 | 50 | 80; 63; 40 | 320; 250; 200; 160 |
| 2 | 8,0 | 25 | 40; 32; 20 | 160; 125; 100; 80 |
| 3 | 8,0 | 12,5 | 20;16,0;10,0 | 80; 63; 50; 40 |
| 4 | 2,5 | 6,3 | 10; 8; 5 | 40; 32; 25; 20 |
| 5 | 2,5 | 3,2 | 5; 4; 2,5 | 20; 16; 12,5; 10,0 |
| 6 | 0,8 | 1,6 | 2,5; 2; 1,25 | 10,0; 8,0; 6,3 |
| 7 | 0,8 | 0,80 | 1,25; 1; 0,63 | 6,3; 5,0, 4,0; 3,2 |
| 8 | 0,8 | 0,40 | 0,63; 0,5; 0,32 | 3,2; 2,5; 2,0; 1,60 |
| 9 | 0,25 | 0,20 | 0,32; 0,25; 0,16 | 1,60; 1,25; 1,00; 0,80 |
| 10 | 0,25 | 0,10 | 0,16; 0,125; 0,08 | 0,80; 0,63; 0,50; 0,40 |
| 11 | 0,25 | 0,05 | 0,08; 0,063; 0,04 | 0,40; 0,32; 0,25; 0,20 |
| 12 | 0,25 | 0,025 | 0,040; 0,032; 0,02 | 0,20; 0,16; 0,125; 0,10 |
| 13 | 0,08 | 0,012 | 0,02; 0,016; 0,01 | 0,10; 0,08; 0,063; 0,05 |
| 14 | 0,08 | 0,012 | 0,01; 0,008 | 0,05; 0,040; 0,032 |
Vendor
We offer to buy precision alloys from specialized warehouses of the supplier Evek GmbH with delivery in any city. Full compliance with modern quality standards. Timely delivery is ensured by representatives in Eastern European cities.
Buy, low price
We offer precision alloys, the price - determined by the technological features of production without the inclusion of additional costs. The company's website displays information on the latest arrivals of products. Products with non-standard parameters can be ordered. We have the best price-quality ratio for the whole range of products. Evek GmbH is a profitable supplier in the precision steel segment.
