ST AO-41-2019 Niobium foil, sheets and plates. Specifications
ORGANIZATION STANDARD
Joint Stock Company "Ulba Metallurgical Plant"
UDC 669.293 + 621.771 + 006.35 KPVED 24.45.30 |
ISS 77.150.99 I APPROVEFirst Deputy Chairman Board of Directors - Chief Engineer of JSC "UMZ" S.V. Bezhetsky «11» 11 2019 |
NIOBIUM FOIL, SHEETS AND PLATES
Technical conditions
ST AO-41-2019
(Introduced to replace ST AO-41-2014)
Valid from 23.12.2019
until 23.12.2024
Original holder:Joint Stock Company "Ulbinsky metallurgical plant" 070005, Ust-Kamenogorsk, Abay Avenue, 102 tel. 29-81-03 |
DEVELOPEDActing Director of Tantalum manufactured by JSC "UMZ" A.V. Antilevko «08» 11 2019 Quality Director of JSC "UMZ" A.V. Bykov «08» 11 2019 |
Ust-Kamenogorsk city
CT AO-41-2019
1 Scope of application
This standard applies to niobium foil, sheets and plates (hereinafter referred to as foil, sheets, plates, products) intended for the production of electrolytic capacitors, vacuum tubes and other purposes.
Examples of product symbols
1 Niobium foil, 0.20 mm thick, 30 mm wide:
Foil Nb 0.20×30 CT AO-41-2019.
2 Niobium foil, 0.20 mm thick, 30 mm wide, 500 mm long:
Foil Nb 0.20×30×500 CT AO-41-2019
3 Niobium sheets 0.25 mm thick, 50 mm wide:
Sheets Hb 0.25×50 CT AO-41-2019.
4 Niobium sheets 0.25 mm thick, 50 mm wide, 500 mm long:
Sheets Hb 0.25x50x500 CT AO-41-2019.
5 Niobium plates 20.0 mm thick, 50 mm wide, 500 mm long:
Plates Hb 20.0x50x500 CT AO-41-2019.
This organization standard may be distributed only with the permission of Ulba Metallurgical Plant Joint Stock Company.
2 Normative references
The following normative documents are indispensable for the application of this standard. For undated references, the latest edition of the referenced document (including any amendments) applies.
Technical regulations "Requirements for product labeling" (approved by the Decree of the Government of the Republic of Kazakhstan dated 15.10.2016 No. 724).
GOST 8.051 State system for ensuring the uniformity of measurements. Errors allowed when measuring linear dimensions up to 500 mm.
GOST 166 Calipers. Technical conditions.
GOST 427 Measuring metal rulers. Technical conditions.
GOST 6507 Micrometers. Technical conditions.
GOST 14192 Marking of goods.
GOST 26877 Metal products. Methods for measuring shape deviations.
MVI 0306 448 Niobium. Methods for determination of oxygen, hydrogen, and nitrogen impurities.
MVI 0306 508 Tantalum, niobium, titanium and their alloys. Method for determination of oxygen, nitrogen and hydrogen by reducing melting in an inert gas flow.
MVI 0306 518 Tantalum, niobium and their products. Method for determination of carbon and sulfur using an automatic analyzer from LECO.
Note - When using this standard, it is advisable to check the validity of referenced documents.
ST AO-41-2019
3 Technical requirements
3.1 Main indicators and characteristics
3.1.1 Foil, sheets and plates are made from niobium ingots in accordance with the requirements of this standard and the additional set of documents 78.02000.00004 [1].
3.1.2 The chemical composition of foil, sheets and plates must correspond to the chemical composition of ingots manufactured according to GOST 16099 [2].
The niobium content is actual and is defined as the difference between 100% and the sum of the mass fractions of regulated impurities.
Foil is additionally checked for oxygen, hydrogen, nitrogen and carbon content. The content of these impurities must comply with the standards specified in Table 1.
Table 1 - Mass fractions of gas impurities
| Name of the controlled impurity | Mass fraction of impurities, %, not more than | ||
| Foil thickness, mm | |||
| from 0.01 to 0.05 incl. | St. 0.05 to 0.10 incl. | St. 0.10 to 0.20 incl. | |
| Oxygen | 0.06 | 0.04 | 0.02 |
| Hydrogen | 0.025 | 0,015 | 0.0015 |
| Nitrogen | 0.02 | 0,015 | 0.01 |
| Carbon | 0.025 | 0,018 | 0,015 |
| Note - By agreement with the consumer, control of the content of gas impurities in finished products may not be carried out, or the values of mass fractions may differ from those given in the table. | |||
3.1.3 The geometric dimensions of the foil, sheets and plates and the maximum deviations for them must correspond to those specified in Table 2.
3.1.4 Foil, sheets and plates are supplied with cleaned surfaces. The presence of visible traces of residual grease, oils and other foreign materials is not allowed.
The plates are usually supplied with an untreated surface. Plates with a mechanically treated surface are supplied upon customer request.
The surface of foil, sheets and plates must not contain any cracks, folds, creases, delamination or through holes.
Minor scratches, marks, cavities, roller marks and pinholes caused by the production method are allowed if their depth does not take the product beyond the maximum thickness deviations after their control cleaning.
It is permissible to eliminate surface defects of sheets and plates on the finished size by etching or mechanical processing, if the geometric dimensions remain within the tolerance field.
For foil widths of 120 mm or more and sheet widths of 150 mm or more, there are no requirements for surface quality.
On the surface of foil 3 m or longer, folds, folds, cracks and through holes are not allowed. In other respects, the surface quality is actual.
A slight waviness is allowed on the surface of the foil, which disappears when the foil is wound onto a cylinder with a diameter of 50 mm.
ST AO-41-2019
3.1.5 The edges of the foil and sheets must be cut evenly; wavy or torn edges are not allowed.
The edges and ends of the plates are milled.
The crescent shape of foil and sheets over a length of 320 mm should not exceed 2 mm.
The warpage of sheets with a thickness of 0.2 to 0.5 mm inclusive should not exceed 3 mm per 300 mm of length.
3.1.6 Products are supplied in unannealed condition. Supply in annealed condition is made by agreement of the parties.
Table 2 - Geometric dimensions of foil and sheets
In millimeters
View products |
Thickness | Width | Length | ||
| nominal | maximum deviation | nominal | maximum deviation | ||
| Foil | from 0.010 to 0.030 incl. | ±0.002 | from 30 to 120 | +1 | not less than 300 |
| sv. 0.030 « 0.090 « | ±0.004 | ||||
| « 0.09 « 0.20 « | ±0.02 | ||||
| Sheets | « 0.20 « 0.40 « | ±0.02 | from 50 to 150 | +2 | |
| « 0.40 « 1.00 « | ±0.04 | ||||
| « 1.0 « 1.5 « | ±0.1 | +3 | |||
| « 1.5 « 3.0 « | ±0.2 | ||||
| « 3.0 « 10.0 « | ±0.3 | +5 | |||
| Plates | « 10.0 « 20.0 « | ±0.5 | no more than 300 | +1 | no more than 600 |
| « 20.0 « 40.0 « | ±0.5 | no more than 200 | no more than 500 | ||
| « 40.0 « 75.0 « | ±0.5 | no more than 400 | |||
Notes 1 By agreement between the manufacturer and the consumer, foil and sheets can be manufactured with geometric dimensions that differ from those given in the table, while the maximum deviations (if not specified by the consumer) in length are +5 mm, and in width: - for sheets: +1 mm, for width less than 50 mm; +5 mm, for width over 150 mm; - for foil: +1 mm, for width less than 30 mm; +2 mm, for width over 120 mm. 2 Length tolerance value for plates of length: - no more than 500 mm incl. - 2 mm; - over 500 mm - 3 mm. | |||||
3.2 Completeness
Package Included:
- a batch (or several batches) of products;
- quality document.
ST AO-41-2019
3.3 Marking
3.3.1 When selling products on the territory of the Republic of Kazakhstan, labeling must comply with the requirements of the technical regulation "Requirements for product labeling".
3.3.2 Each roll (pack) of foil (sheets, plates) is provided with a label containing the following information:
- name of the manufacturer and its trademark;
- contract number and designation of this standard;
- name of product;
- batch number;
- dimensions (thickness, width, length);
- condition of the material;
- net weight;
- date of acceptance by the quality control department;
- quality control stamp.
Note - The batch number is formed from the serial number assigned to each nominal thickness of the product and, separated by a fraction, the batch number of the ingot from which this batch of products is manufactured.
3.3.3 Transport marking according to GOST 14192 with additional indication:
- product names;
- batch numbers;
- inscriptions: "Made in the Republic of Kazakhstan" (when delivering products outside the
Republic of Kazakhstan).
3.4 Packaging
3.4.1 Foil with a thickness of 0.05 mm or less is supplied on cores with a winding diameter of (34±5) mm. The length of the core should be greater than the width of the foil by a value of 5 to 20 mm.
3.4.2 Foil with a thickness of more than 0.05 mm and sheets with a thickness of 0.5 mm or less are supplied in rolls and packs. Sheets with a thickness of more than 0.5 mm are supplied in packs.
3.4.3 Each roll or pack contains products of the same batch and the same nominal thickness and width.
3.4.4 Rolls or packs of foil (sheets, plates) are wrapped in paper, packed in wooden boxes made according to the manufacturer's drawings, and reinforced in such a way (using gaskets made of corrugated cardboard, sponge rubber, foam plastic, cotton wool, felt, polyethylene, paper) as to exclude the possibility of their movement inside the box.
3.4.5 The net weight of the box (case) must not exceed 50 kg.
3.4.6 The weight of one roll (pack) of foil must not exceed 10 kg. Delivery of larger weights is permitted upon agreement with the consumer or at the consumer's request.
4 Acceptance Rules
4.1 Products are accepted in batches. A batch must consist of sheets (plates, foil) of the same size (thickness), made from one ingot, heat-treated at the same time, and be accompanied by one quality document indicating:
name of the manufacturer and its trademark;
contract number and designation of this standard;
product name;
ST AO-41-2019
- batch number;
- dimensions (thickness, width, length);
- chemical composition (at the request of the consumer);
- condition of the material;
- net weight;
- date of issue of the quality document;
- quality control department conclusion.
It is permitted to issue one quality document for several batches of products from one delivery.
4.2 The chemical composition of foil, sheets and plates (except for the mass fractions of oxygen, hydrogen, nitrogen and carbon in the foil) is taken from the chemical composition of ingots manufactured in accordance with GOST 16099 [2].
The mass fractions of oxygen, hydrogen, nitrogen and carbon are determined on samples taken from each batch of foil.
4.3 Each piece of foil and each sheet and plate are subject to control of geometric dimensions, surface quality, quality of cut edges and ends, crescent shape and warping.
4.4 Individual pieces of foil, sheets or plates rejected by the consumer as not meeting the requirements of 3.1.3-3.1.5 of this standard shall not be grounds for rejecting the entire lot. Such products may be returned to the manufacturer for replacement.
4.5 If unsatisfactory test results are obtained for the chemical composition of the foil specified in Table 1, repeat tests are carried out on a double sample weight (at least 40 g) taken from the same sample. The results of the repeat tests are final.
5 Control methods
5.1 Inspection of the product surface is carried out without the use of magnifying devices.
5.2 The warpage of sheets with a thickness from 0.2 to 0.5 mm inclusive and the crescent shape of foil and sheets are checked according to GOST 26877.
5.3 To determine the mass fraction of oxygen, hydrogen, nitrogen and carbon, one roll is selected from each batch of foil, from which a section weighing at least 20 g is taken, wiped with calico, cut into plates no larger than 3.0 × 3.0 mm in size, washed with alcohol and dried.
Determination of mass fractions of oxygen, hydrogen, nitrogen and carbon is carried out according to MVI 0306 448, MVI 0306 508, MVI 0306 518.
5.4 The following measuring instruments are used to control the geometric dimensions of products:
- micrometer MK 25 according to GOST 6507;
- metal measuring rulers according to GOST 427.
- ShTs caliper according to GOST 166.
It is permitted to control the geometric dimensions of products using other measuring instruments that ensure the required accuracy in accordance with GOST 8.051.
5.5 The completeness, marking and packaging of the products are checked by inspection for compliance with the requirements of 3.2-3.4.
ST AO-41-2019
6 Transportation and storage
6.1 Transportation of products is carried out in packaged form by all types of transport in covered vehicles in accordance with the rules for the transportation of goods in force for this type of transport.
6.2 Products are stored in closed premises under conditions that exclude mechanical damage and exposure to moisture and active chemicals.
7 Manufacturer's Warranties
7.1 The manufacturer guarantees that the products comply with the requirements of this standard provided that the consumer complies with the transportation and storage conditions.
7.2 The guaranteed shelf life of the product is five years from the date of acceptance by the quality control department of the manufacturing plant.
ST AO-41-2019
Bibliography
[1] 78.02000.00004 Additional set of documents on technological processes for the production of ingots, capacitor powders, flat and round rolled products from tantalum and niobium.
[2] GOST 16099-80* Niobium in ingots. Technical conditions.
