TU 48-21-92-89 (replaces TU 48-21-92-80)

OKP 18 4610 AGREED: Deputy Head enterprises P.O. Box A-1981 V.L. Happy «4» 08 1989

UDC 669.35'6-412 Group B 53 I APPROVE: Chief Engineer of NPO "Tsvetmetobrabotka" G.I. Sarul «1» 09 1989

BRONZE PLATES AND CYLINDRICAL BLANKS OF BRNBT GRADE

TECHNICAL SPECIFICATIONS

TU 48-21-92-89

(replaces TU 48-21-92-80)

Valid from 01/01/90 to 01/01/95

Deputy Head Enterprises P.O. Box B-2775 Yu.P. Gorodnichev «02» 08 1989 Head of State Acceptance at the Moscow OCM plant Yu.A. Rykov «14» 08 1989

Acting Chief Engineer Moscow Non-ferrous Metals Plant V.I. Yanin «23» 05 1989 Deputy Director of the Institute "Giprotsvetmetobrabotka" M.M. Fedorov «22» 08 1989

1989

These technical conditions apply to cast and hot-rolled plates and cast cylindrical blanks made of BrNBT grade bronze, intended for the manufacture of contact welding machines:

Examples of symbols:

Cast plate (L), rectangular section (PR), 70 mm thick, 265 mm wide, 1400 mm long, made of BrNBT bronze:

Slab LPR 70x265x1400 BrNBT TU 48-21-92-89

Hot-rolled plate (G), rectangular section (PR), 24 mm thick, 415 mm wide, 405 mm long made of BrNBT bronze:

Slab GPR 24x415x405 BrNBT TU 48-21-92-89

Cast blank (L), cylindrical (C), 100 mm in diameter, 1500 mm in length, made of BrNBT grade bronze:

LC blank Ø100x1500 BrNBT TU 48-21-92-89.

1. TECHNICAL REQUIREMENTS.

1.1. ASSORTMENT.

1.1.1. The dimensions of the slabs and their maximum deviations must comply with the requirements specified in Table 1.

mm Table 1

Thickness	Maximum thickness deviations	Width	Maximum deviations in width	Length	Maximum deviations in length for finished size
1	2	3	4	5	6
10 10 10	+2	340 390 340	±10	Multiple of 80 Multiple of 80 330	+10

					TU 48-21-92-89
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Developer.		Grechanikov			BRONZE PLATES AND CYLINDRICAL BLANKS OF BRNBT GRADE	Lit.	Sheet		Sheets
Prov.		Sarul				A		2		9
Hand.						MOSCOW PLANT OF NON-FERROUS MATERIALS
N. counter.
Approved.

mm Table 1 (continued)

1	2	3	4	5	6
14 14 16 16 16 20 20 20 20 20 20 24 24 24 24 29 29 29 33	+2	330 270 270 420 335 330 340 420 265 335 415 420 265 335 415 265 335 415 200	±10	Multiple of 105 Multiple of 130 Multiple of 130 205 325 Multiple of 105 165 205 255 325 405 205 255 325 405 255 325 405 Multiple of 50	+10
35 40 40 43 46 48	+2	335 355 385 500 345 525	±10	325 335 355 180 185 180	+10 -5
50 55 67 68 70 70 77 77 80 120 190	+5 +5 +5 ±2 ±2 ±2 +5 +5 ±2 ±5 ±5	100 155 142 148 265 265 93 93 98 120 110	±5	Not less than 150 1200-2200 440 440 1400 1600 690 1600 1600 1600 1600	+20 +20 ±10 ±10 +20 ±50 +20 ±50 ±50

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Notes: 1. Plates with a thickness of 55 mm and more are manufactured as castings. 2. By agreement between the manufacturer and the consumer, it is permitted to manufacture plates and cylindrical blanks with other dimensions and maximum deviations specified in the work order.

1.1.2. The dimensions of cast cylindrical blanks and their maximum deviations must comply with the requirements specified in Table 2.

mm Table 2

Diameter	Maximum deviations in diameter	Length
1	2	3
100 120 125 145 200	±5	50-2200 120-900 - " - - " - 50-1500

1.2. Plates and cylindrical blanks are manufactured in accordance with the requirements of these technical conditions according to the technological regulations approved in the established manner.

1.3. The chemical composition of slabs and cylindrical blanks made of BrNBT bronze must correspond to that specified in Table 3.

Main components				Impurities, no more than
Beryllium	Nickel	Titanium	Copper	Lead	Tin	Zinc	Aluminum	Total
0.2-0.4	1.4-1.8	0.005-0.15	Rest	0.005	0,1	0.2	0.15	0.7

1.4. Minor defects in the form of scratches, dents, pores, films and cracks, as well as deviations from the plane within the circumference corresponding to the roller diameter, which can be removed by turning to the nominal size of the electric rollers, are allowed on the surface of the plates and cylindrical blanks. It is allowed to check the surface quality of the plates and cylindrical blanks using standard samples agreed upon between the manufacturer and the consumer in the established manner.

1.5. Cast plates and cylindrical blanks are supplied without thermomechanical treatment.

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1.6. Hot rolled plates are supplied heat treated and straightened.

1.7. The hardness of hot-rolled plates must be at least 170 HB.

2. ACCEPTANCE RULES

2.1. Plates and cylindrical blanks are accepted in batches. A batch must consist of plates or cylindrical blanks of the same size and condition. The mass of a batch must not exceed 1000 kg.

2.2. To determine the chemical composition, 3 samples are taken from the batch. The manufacturer takes samples from the molten metal of each heat.

2.3. Each plate and cylindrical workpiece is subject to quality control according to paragraphs 1.1.1, 1.1.2, 1.4.

2.4. To determine the hardness of hot-rolled plates, two plates are selected from a batch.

2.5. If unsatisfactory control results are obtained for at least one of the indicators, repeat tests are carried out on a double sample.

The results of the retests apply to the entire batch.

3. CONTROL METHODS

3.1. To determine whether the quality of slabs and cylindrical blanks meets the requirements of these technical conditions, the control methods specified below must be used.

3.2. Surface quality control according to paragraph 1.4 is carried out visually.

3.3. Quality control of slabs and cylindrical blanks according to paragraphs 1.1.1 and 1.1.2 is carried out using a caliper in accordance with GOST 166-80, a metal ruler in accordance with GOST 427-75 and a tape measure in accordance with GOST 7502-80.

The thickness of the slabs is measured at a distance of at least 100 mm from the end and at least 10 mm from the edge.

The measurement of the geometric dimensions of slabs with a thickness of 14 to 55 mm is carried out without taking into account uneven ends formed due to uneven metal drawing across the width of the strip during rolling.

It is permissible to determine the dimensions of slabs and cylindrical blanks using other measuring instruments that provide

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the necessary precision.

3.4. Analysis of chemical composition is carried out according to GOST 20068.1-79 - GOST 20068.2-79.

If disagreements arise in the assessment of the chemical composition, the analysis is carried out in accordance with GOST 15027.5-77, GOST 15027.13-77, GOST 15027.14-77.

Sampling for determination of chemical composition is carried out in accordance with GOST 24231-80.

3.5. The hardness of hot-rolled plates is determined according to GOST 9012-59 on heat-treated plates with a ball of 10 mm in diameter with a test load of 3 tons and a duration of 20 ±5 sec: quenching from a temperature of 900-950 °C in water, holding time for quenching is 2 hours; tempering at a temperature of 400-450 °C, holding for 2-3 hours, cooling in air.

3.6. The batch weight control is carried out on scales with a weighing limit of up to 1000 kg in accordance with GOST 23676-79 with an acceptable measurement error of ±1%.

4. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

4.1. Plates and cylindrical blanks are supplied without packaging.

4.2. Each plate and cylindrical blank must be marked with stamp paint:

- trademark or name of the manufacturer;

- quality control stamp.

4.3. Each batch of slabs or cylindrical blanks must be provided with a quality document containing:

- trademark or name of the manufacturer;

- conventional designation of plates or cylindrical blanks;

- results of hardness measurements of hot-rolled plates;

- result of chemical analysis (at the consumer's request);

- batch number;

- the mass of the batch.

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4.4. Plates and cylindrical blanks are transported by all types of transport in covered vehicles in accordance with the rules for the transportation of goods in force for the given type of transport.

4.5. During storage, slabs and cylindrical blanks must be protected from moisture, dust and exposure to active chemical reagents.

4.6. If the specified storage conditions are met, the consumer properties of this product do not change during storage.

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Appendix 1

SCROLL

documents referenced in TU 48-21-92-89

GOST 166-80 GOST 427-75 GOST 7502-80 GOST 9012-59 GOST 15027.5-77 GOST 15027.13-77 GOST 15027.14-77 GOST 20068.1-79 GOST 20068.2-79 GOST 23676-79 GOST 24231-80

Calipers. Technical conditions. Measuring metal rulers. Technical conditions. Measuring metal tape measures. Technical conditions. Metals. Test methods. Brinell hardness measurement. Tin-free bronzes. Methods for determination of nickel. Tin-free bronzes. Method for determination of beryllium. Tin-free bronzes. Methods for determination of titanium. Tin-free bronzes. Method of spectral analysis using metallic standard samples with photographic recording of spectra. Tin-free bronzes. Method of spectral analysis using metallic standard samples with photoelectric recording of spectra. Scales for static weighing. Weighing limits. Metrological parameters. Non-ferrous metals and alloys. General requirements for sampling and preparation of samples for chemical analysis.

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