Tu 48-19-315-89. Molybdenum bands for the electrovacuum industry are unannealed. Technical conditions.
You are interested in TU 48−19−315−89 «Molybdenum bands for the electrovacuum industry. Technical specifications «from the supplier company AvecGlob? Here you will find interesting information on this topic.
Application area
The present technical specifications apply to molybdenum cold-and hot-rolled strips made of molybdenum sintered plates of the MCH brand and intended for the manufacture of parts of electrovacuum devices.
Technical requirements
The nominal dimensions of the strips and the dimensional deviations of the dimensions must meet the requirements * indicated in the table
| Name | Thickness, mm | Width, mm | Length, mm, not less than | ||
| nom. | before. off | nom. | before. off | ||
| Strips cold-rolled | from 0.10 to 0.20 after 0.05 | ± 0.015 | from 50 to 150 through 10 | ± 1.0 | 300 |
| from 0.25 to 0.35 after 0.05 | ± 0.020 | 200 | |||
| from 0.40 to 0.50 after 0.05 | ± 0.030 | 150 | |||
| Hot-rolled strip | 0.60 | ± 0.030 | from 50 to 150 through 10 | ± 5.0 | 150 |
| from 0.70 to 1.00 through 0.10 | ± 0.050 | ||||
| from 1.10 to 2.00 through 0.10 | ± 0.070 | ||||
| from 2.10 to 3.50 through 0.10 | ± 0.120 | 100 | |||
The chemical composition of the poles must meet the requirements specified in the table (molybdenum-base):
| Component name | Mass fraction,% |
| Determined impurities,%, not more than | |
| iron | 0.010 |
| aluminum | 0.004 |
| nickel | 0.005 |
| silicon | 0.010 |
| calcium | 0.003 |
| magnesium | 0.002 |
| carbon | 0.005 |
| oxygen | 0.008 |
Supplier — AvekGlob Company — offers at reasonable prices from the manufacturer a molybdenum strip in a wide range of widths and cross sections that meets the technical requirements of TU 48−19−315−89. The supplier guarantees the timely delivery of products to any address specified by the consumer.
Quality indicators
The edges of the bands should be cut off. Ripples along the edges are not allowed.
The surface of the strips must be degreased. As agreed with the customer, traces of process lubrication are allowed on the surface of the strips. Stratification and oxides are not allowed on the surface of the strips. Warnings are not:
- roll marks, depressed shells, scraping traces that do not lead to strips beyond the allowed thickness deviation, in an amount not exceeding 5 pcs. each defect at a controlled length;
- mechanical damage in the form of scratches, which do not lead to strips beyond the allowed thickness deviations;
- on strips of thickness 0.10 — 0.30 mm, the total waviness disappears when rolled into a roll with a diameter of 50−60 mm.
The roughness parameter R a in accordance with GOST 2789−73 of the surface of cold-rolled strips 0.1 — 0.5 mm thick should not be more than 1.25 μm.
Mechanical characteristics
The mechanical properties of cold-rolled strips with a thickness of 0.1−0.5 mm should meet the requirements specified in the table:
| Thickness, mm | Strength, MPa, not less than | Relative elongation,%, not less than | |
| Along the rolling direction | Across the direction of rolling | ||
| 0.10 | 980 | 2.0 | 2.0 |
| 0,15 | 2.0 | 2.0 | |
| 0.20 | 2.5 | 2.0 | |
| 0.25 | 3.0 | 2.0 | |
| 0.30 | 4.0 | 2.5 | |
| 0.35 | 5.0 | 2.5 | |
| 0.40 | 6.0 | 2.5 | |
| 0.45 | 6.0 | 2.5 | |
| 0.50 | 6.0 | 3.0 | |
Supplier — AvekGlob company — offers to purchase strips of molybdenum, which meet the requirements of TU 48−19−315−89. Products can be bought at a price formed on the basis of European and world standards of production. Implementation is possible in bulk and retail, for regular customers, a flexible system of discounts operates.