GOST 8851-75
GOST 8851−75 Strip of steel grades 11kp and 11JUA. Technical specifications (with Changes 1−3 N)
GOST 8851−75
Group B34
MIODARONE STANDARD
STRIP OF STEEL GRADES 11kp and 11JUA
Specifications
Strip of steel grades 11kp and 11JUA. Specifications
OKP 12 3100
Date of introduction 1978−01−01
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR
2. APPROVED AND promulgated by the Decree of the State Committee of standards of Ministerial Council of the USSR from
Change No. 3 adopted by the Interstate Council for standardization, Metrology and certification
The adoption voted:
| The name of the state |
The name of the national authority for standardization |
| The Republic Of Belarus |
Gosstandart Of Belarus |
| The Republic Of Moldova |
Moldovastandart |
| Russian Federation |
Gosstandart Of Russia |
| Turkmenistan |
The main state inspection of Turkmenistan |
| Ukraine |
Gosstandart Of Ukraine |
3. REPLACE GOST 8851−58
4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced |
Item number |
| GOST 503−81 |
2.5 |
| GOST 803−81 |
2.1 |
| GOST 1050−88 |
2.1 |
| GOST 1778−70 |
4.4 |
| GOST 2789−73 |
4.3 |
| GOST 3282−74 |
5.2 |
| GOST 3560−73 |
5.2 |
| GOST 7564−97 |
4.6 |
| GOST 7566−94 |
3.1, 5.1 |
| GOST 8273−75 |
5.2 |
| GOST 9569−79 |
5.2 |
| GOST 10354−82 |
5.2 |
| GOST 11701−84 |
4.6 |
| GOST 14192−96 |
5.1 |
| GOST 15846−79 |
5.5 |
| GOST 20799−88 |
5.2 |
5. Limitation of actions taken by Protocol No. 2−93 of the Interstate Council for standardization, Metrology and certification (ICS 2−93)
6. EDITION with Amendments No. 1, 2, 3, approved in February 1983, June 1987 and December 1995 (IUS 5−83, 9−87, 3−96)
This standard applies to cold rolled strip in coils and lengths of carbon steel grades 11kp and 11JUA, intended for the manufacture of parts by means of deep drawing.
(Changed edition, Rev. N 1).
1. ASSORTMENT
1.1. The tape is manufactured with a thickness from 1.37 to 2.2 mm; width from 53 to 181 mm; length: in coil not less than 20 m; in segments — 900−1300 mm.
Limit deviations of the dimensions must not exceed:
| thickness: minus 0.07 mm, at a thickness of 1.37 mm; |
|||
| minus 0,13 mm when the thickness St of 1.37 to 2.2 mm; | |||
| width: minus 1.0 mm. | |||
Tape in segments is made by agreement between manufacturer and consumer.
(Changed edition, Rev. N 1, 2).
1.2. The tape shall be manufactured with obraznymi edges.
(Changed edition, Rev. N 1).
1.3. Camber strips shall not exceed 2.0 mm per 1 m length.
(Changed edition, Rev. N 2).
1.4. The coil should consist of one piece of belt. Allowed up to 10% of coils, consisting of two or three lengths of at least 10 m.
1.5. The ends of the strips should be cut at right angle. Allowed cut end Squareness, mm, not more than 5 mm.
Example of designation strips of steel grades 11kp with a width of 160 mm:
Tape 11kp — 160 GOST 8851−75
1.4, 1.5. (Changed edition, Rev. N 1).
2. TECHNICAL REQUIREMENTS
2.1. Tape shall be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner, of steel grades 11kp with the chemical composition according to GOST 1050 and brand 11JUA with the chemical composition according to GOST 803.
2.2. The ribbon segments produced in the annealed condition, tape in rolls — in dressirovka condition. Annealing is done to protect from oxidation environment or an oxidizing environment, followed by etching of the ribbon.
(Changed edition, Rev. N 1).
2.3. The mechanical properties of the tape must conform to the standards specified in the table.
| Steel grade |
Temporary resistance |
Elongation after rupture in |
| 11kp |
260−360 (27−37) |
27 |
| 11JUA |
290−410 (30−42) |
28 |
, %, not less
(Changed edition, Rev. N 1, 2).
2.4. Edge tapes must not have cracks, flaws and delaminations. Not allowed burrs are bigger than the limit deviation on thickness.
2.5. The surface of the tape should correspond to the third group according to GOST 503, roughness class 1.25 to 2.0 micrometers. By agreement with the consumer allowed the color of the tint.
2.6. (Deleted, Rev. N 3).
2.7. The contamination of steel 11JUA non-metallic inclusions shall not exceed:
the oxides of stroke (OS) — score 3;
the sulphides (A) — 3 points.
Allowed on a single sample contamination by sulfides no more than 4 points.
3. ACCEPTANCE RULES
3.1. The ribbon take parties. The party should consist of tape one melting, one species of manufacture (rolls or segments), one annealing and accompanied by a quality document, issued in accordance with GOST 7566.
The mass of the party must be at least 2 t
(Changed edition, Rev. N 1).
3.2. The appearance inspection, surface roughness and size shall be subjected to each roll or segment of the tape, and when the automatic flow control — two rolls of ribbon from the party.
From the party of the ribbon should be selected:
to check strength and relative elongation after rupture — two rolls (upper and lower row — after annealing of the ribbon) or six segments of the tape (from lower, middle and upper range after annealing of the tape) — from the manufacturer; any two of a coil or two cut strips from each ton of the party — the consumer;
for inspection of non-metallic inclusions — two rolls (upper and lower range after annealing of the tape), or three pieces of ribbon (from the upper, middle and lower row — after annealing of the tape) — from the manufacturer; any two roll from the party or one segment of the tape from each ton of tape — the consumer.
(Changed edition, Rev. N 1, 2, 3).
3.3. For cutting and compression caps across the width of the tape taken by two segments of length 2 m from the two rolls of each batch or two cut strips from tons. Produce cutting across the width of the tape. Convolution of caps produced by the instrument made by the manufacturer.
(Changed edition, Rev. N 1).
3.4. If unsatisfactory test results of at least one of the indicators it is carried out re-tests on twice the number of samples taken from other bands of the same party.
The results of repeated tests apply to the entire party.
4. TEST METHODS
4.1. The measurement of the thickness of the tape is produced automatically in the stream or on the second or third turns of the coil and on all segments of the tape with a micrometer with an accuracy of at least 0,01 mm at a distance of not less than 50 mm from the end and not less than 10 mm from the side edge. Produce measurements at three points along the length and at two points in width. The measurement of the width of the tape produces a stepped bracket with a limiting size. When checking thicknesses, the consumer party is considered to be appropriate to the requirements of this standard if 20 of the measurements made in 1 m of the roll, one result has a tolerance of ±0.01 mm.
4.2. Quality control of the surface and the edges of the belt is carried out visually on the second and third coils of the roll and on all segments of the tape.
4.1, 4.2. (Changed edition, Rev. N 1).
4.3. Surface roughness is determined according to GOST 2789 by profilometer-profilograph periodically by agreement between the consumer and the manufacturer.
4.4. Check on the contamination of non-metallic inclusions is carried out by ø2 churchyard 1778.
(Changed edition, Rev. N 3).
4.5. (Deleted, Rev. N 3).
4.6. The mechanical properties determined according to GOST 11701 on the sample cut along the direction of rolling according to GOST 7564.
4.7. The tape test for felling and convolution caps. The number of defective caps should not exceed 0.4% of all deforested caps batch-annealing. Bundles are not allowed.
The specified test may be omitted if the manufacturer guarantees that the quality of the tape in accordance with the requirements of this standard.
(Changed edition, Rev. N 3).
4.8. To check the microstructure of each of the selected roll or cut the tape cut along the direction of rolling one sample from the middle of the width of the tape. Size of samples for micro-sections should be 30x40 mm with a thickness equal to the thickness of the tape. Side of the sample, equal to 30 mm, should be located along the direction of rolling.
(Changed edition, Rev. N 1).
4.9. To check for the presence of non-metallic inclusions are selected six samples from the middle part in the width of the tape. Allowed to make the test on samples selected for evaluation of the microstructure.
5. MARKING, PACKAGING, TRANSPORTATION AND STORAGE
5.1. Marking, packaging, transportation and storage — by GOST 7566. Transport marking under GOST 14192.
5.2. The surface of the tape rolls and cuts should be covered with oil according to GOST 20799. The tape should be wound in coils with outer diameter 600 to 900 mm.
Segments of the tape have to be stacked in bundles weighing from 2 to 5 tons size 1300х750х500 mm each. Coils and bundles must be tied with wire according to GOST 3282 diameter not less 3 mm or tape according to GOST 3560 size 1х30 mm.
Rolls transporterowych in specialized metal containers.
Bundles prior to strapping tape or wire is wrapped on all sides with sheets of black plate with a thickness of 0.5 mm. Bundles tied with three strips in the two transverse and longitudinal directions.
Packaging rolls in bundles weighing up to 3 tons every 3−5 rolls in a bundle. The bond rolls are made in conjunction with tape in three places.
A bunch of coils wrapped in waterproof according to GOST 9569* or wax paper according to GOST 8273 or polymer film according to GOST 10354.
______________
* On the territory of the Russian Federation GOST 9569−2006. — Note the manufacturer’s database.
(Changed edition, Rev. N 3).
5.3. Tape should be stored in warehouses in the enclosed space, protected from exposure to moisture and active chemical reagents.
5.4. The coils in the containers and sections in bundles transportyour transport of all types in open and closed vehicles, rolls in bales in covered vehicles in accordance with cargo carriage regulations applicable to transport of this type, the technical conditions of loading and fastening of cargoes, approved by the Ministry of Railways of the USSR.
5.5. When transporting the tape in the far North and remote areas of the packing is made according to GOST 15846*.
_______________
* On the territory of the Russian Federation GOST 15846−2002. — Note the manufacturer’s database.
(Changed edition, Rev. N 1).
