Tu 48-19-472-90. Measured billets of molybdenum grades MCh and MCVP. Technical conditions.
Technical requirements Tu 48-19-472-90.
1.1 Measured billets of molybdenum of MCh and MCVP grades (hereinafter - Billets) must comply with the requirements of these technical specifications.
1.2 They must be made of powdered molybdenum billets of MCh grade and vacuum-melted molybdenum ingots of MCVP grade.
1.3 The parameters of the blanks must comply with those specified below.
| Thickness, mm | Basic deviations | MF Width, mm | MF Length, mm | MFVP Width, mm | MSRP Length, mm |
| 0.10 to 0.2 in 0.05 | ± 0,03 | from 100 to 200 | 400 to 600 | 100 to 200 | 400 to 600 |
| 0.25 to 0.35 over 0.05 | ± 0,04 | --- "--- | from 350 to 600 | --- "--- | from 400 to 600 |
| 0.40 to 0.60 in 0.05 | ± 0,06 | --- "--- | from 400 to 600 | --- "--- | from 400 to 600 |
| 0.70 to 0.90 in 0.1 | ± 0,07 | 200 to 300 | 200 to 600 | 200 to 300 | 200 to 600 |
| 1.0 to 2.0 in 0.2 | + 0,1 - 0,2 |
100 to 400 | 100 to 900 | 100 to 300 | 200 to 600 |
| 2.1 to 3.0 in 0.3 | + 0,1 - 0,2 |
--- "--- | 100 to 700 | --- "--- | 200 to 500 |
| 3.5 to 4.0 in 0.5 | + 0,2 - 0,5 |
--- "--- | from 100 to 500 | --- "--- | 200 to 300 |
| 4.5 to 6.0 in 0.5 | + 0,2 - 0,5 |
100 to 400 | 100 to 400 | 100 to 200 | 200 to 300 |
| 6.5 to 10.0 in 0.5 | + 0,2 - 0,5 |
from 100 to 300 | 100 to 300 | - | - |
| 11.0 to 20.0 in 1.0 | ± 0,9 | 50 to 200 | --- "--- | - | - |
1.4 Chemical composition.
| Mass fraction, %. | alloy grade MTF | grade MFVP |
| aluminum | 0,004 | 0,004 |
| iron | 0,010 | 0,010 |
| nickel | 0,005 | 0,005 |
| silicon | 0,010 | 0,010 |
| calcium and magnesium (in total) | 0,005 | 0,005 |
| carbon | 0,010 | 0,030 |
| oxygen | 0,008 | 0,005 |
| nitrogen | - | 0,005 |
| hydrogen | - | 0,0008 |
| Molybdenum | basis | basis |
1.5 The edges of the blanks must be chopped or trimmed. Flaking on the edges of blanks, arising after trimming, allowed for the width of 2.5 mm, the length - 5.0 mm, and is not a defective feature. By agreement with the consumer blanks thickness over 2.0 mm delivered without chipping edges. 1.6.
1.6 The surface of the blanks must be cleaned from the oxide film or degreased. As agreed with the customer, traces of technological grease are allowed on the surface of workpieces.
1.7 Cracks and splitting on the surface of the workpieces are not allowed. Impressions rolls, pricks, indentations, scratches, traces of scraping, not withdrawing the thickness beyond the allowable deviations, etching tints are not a defective feature.
1.8 Billets shall be manufactured with the following flatness tolerances: the deviation from flatness along the rolling direction (deflection) shall be not more than 10% of the measured billet length; the deviation from flatness across the rolling direction (corrugation) shall be not more than 5% of the measured billet width. The overall waviness of the billets is not a rejection feature.
1.9 Mechanical properties of billets along the rolling direction.
| Thickness, mm | ultimate strength, MPa (kgf/mm2), not less | Relative elongation, not less, %, 0,10 |
|---|---|---|
| 0,10 | 882 (90) | 1,5 |
| 0,15 | 882 (90) | 1,5 |
| 0,20 | 882 (90) | 1,5 |
| 0,25 | 882 (90) | 1,5 |
| 0,30 | 980 (100) | 2,0 |
| 0,35 | --- "--- | 2,0 |
| 0,40 | 980 (100) | 2,0 |
| 0,45 | --- "--- | 2,0 |
| 0,50 | 980 (100) | 2,0 |
| 0,55 | --- "--- | 2,0 |
| 0,60 | 980 (100) | 2,0 |
Furnizor
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