GOST 808-70
GOST 808−70 flattened steel Strip for wound rollers. Technical specifications (with Changes 1−3 N)
GOST 808−70
Group В73*
INTERSTATE STANDARD
FLATTENED STEEL STRIP FOR WOUND ROLLERS
Specifications
Flattened steel strip for wound rollers. Specifications
OKP 12 3100
Date of introduction 1971−01−01
INFORMATION DATA
1. DEVELOPED AND INTRODUCED by the Ministry of ferrous metallurgy of the USSR
2. APPROVED AND put INTO EFFECT by Decision of the Committee of standards, measures and measuring devices under Council of Ministers of the USSR from
3. REPLACE GOST 808−49
4. REFERENCE NORMATIVE AND TECHNICAL DOCUMENTS
| The designation of the reference document referenced |
Item number |
| GOST 427−75 |
3.7 |
| GOST 3118−77 |
3.2 |
| GOST 3282−74 |
4.2, 4.4 |
| GOST 3560−73 |
4.2, 4.4 |
| GOST 6507−90 |
3.2 |
| GOST 8273−75 |
4.4 |
| GOST 8828−89 |
4.4 |
| GOST 9013−59 |
3.6 |
| GOST 9569−79 |
4.4 |
| GOST 10354−82 |
4.4 |
| GOST 11701−84 |
3.5 |
| GOST 12344−88 |
3.4 |
| GOST 12345−2001 |
3.4 |
| GOST 12346−78 |
3.4 |
| GOST 12347−77 |
3.4 |
| GOST 12348−78 |
3.4 |
| GOST 12350−78 |
3.4 |
| GOST 12352−81 |
3.4 |
| GOST 12355−78 |
3.4 |
| GOST 14192−96 |
4.5 |
| GOST 15150−69 |
4.7 |
| GOST 16272−79 |
4.4 |
| GOST 20799−88 |
4.3 |
| GOST 21650−76 |
4.6 |
| GOST 24597−81 |
4.6 |
| OST 38.01436−87 |
4.3 |
5. Limitation of actions taken by Protocol No. 4−93 of the Interstate Council for standardization, Metrology and certification (ICS 4−94)
6. EDITION with Amendments No. 1, 2, 3 approved in December 1982, June 1987, February 1992 (IUS N 3−83, 11−87, 5−92)
This standard applies to the steel strip, manufactures wire and intended for the manufacture of twisted roller bearings.
(Changed edition, Rev. N 2, 3).
1. ASSORTMENT
1.1. Tape dimensions and limit deviations shall be as specified in table.1.
Table 1
mm
| The thickness of the strip |
Tape width | ||
| Nomin. |
Pred. off. | Nomin. | Pred. off. |
| 1,5 |
±0,10 | 5 | ±0,13 |
| 1,6 |
5 | ||
| 1,75 |
6 | ||
| 1,85 |
6 | ||
| 2,1 |
6 | ||
| 2,5 |
5 | ||
| 2,6 |
7 | ||
| 3,0 |
±0,10 | 9 | ±0,18 |
| 3,5 |
10 | ||
| 4,0 |
10 | ||
| 4,8 |
12 | ||
| 5,0 |
12 | ||
| 5,2 |
±0,13 | 12 | |
| 5,7 |
15 | ||
| 6,5 |
15 | ||
| 7,6 |
±0,18 | 15 | |
Example of designation of strip size 4x10 mm:
Tape 4x10 GOST 808−70
2. TECHNICAL REQUIREMENTS
2.1. Flattened steel strip for wound rollers must be manufactured in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.
(Added, Rev. N 2).
2.1. The tape shall be manufactured of steel grade SHKH10 the following chemical composition:
| carbon |
0,32−0,42% |
| manganese |
0,40−0,70% |
| silicon |
0,17−0,37% |
| chrome |
0,80−1,20% |
| sulfur, not more than |
0,030% |
| phosphorus, not more than |
0,030% |
| Nickel, not more than |
0,20% |
| copper, no more |
0,25% |
2.2. The tape is manufactured in the annealed condition. The color of the surface tapes do not agree.
2.3. The mechanical properties of the tape shall be as specified in table.2.
Table 2
| Tape thickness, mm | Tensile strength, |
Elongation ( |
| To 2.5 |
570−810 (58−83) | 7 |
| SV. 2,5 |
510−760 (52−77) | 12 |
(Changed edition, Rev. N 2).
2.4. The hardness of the strip after quenching and tempering should not be below a 46.5 (45 HRC).
(Changed edition, Rev. N 1, 2, 3).
2.5. The tape surface should be smooth without captured, pinches, scratches, rust.
Allowed local dents, shells, tubercles, risk size of not more than 0.05 mm for tape up to 4,8x12 mm, inclusive, and the value of not more than 0,08 mm for strips of large dimensions.
The strip edges have natural rounding and can have a roughness obtained as a result of flattening.
2.6. Camber strips shall not exceed 15 mm per 1 m length of the tape.
2.7. Tapes are made in rolls weighing 40 to 100 kg with an internal diameter of 300 to 600 mm. Coil shall consist of one segment. The entanglement of the turns of tape are not allowed.
Allowed to make tape in rolls weighing not less than 25 kg not more than 10% of the party.
(Changed edition, Rev. N 1).
2.8. (Deleted, Rev. N 1).
2A. ACCEPTANCE RULES
2A.1. The ribbon take parties. The party should consist of strips of one and bottoms of the same size, one batch in the oven, or a single mode of heat treatment in continuous furnaces and be accompanied by a document about quality that contains:
trademark and (or) the name of the manufacturer;
the symbol of the tape;
grade of steel;
the number of melt with the chemical composition;
the results of the tests;
the number of coils and the weight of the party.
By agreement between manufacturer and consumer, the party may consist of ribbons of different heats.
(Changed edition, Rev. N 2, 3).
2A.2. The inspection of appearance and dimensions should be subjected to this kind of party ribbon.
2A.3. From the party of the ribbon should be selected:
to check strength and elongation — 5% skeins, but not less than three coils;
to check the camber and chemical composition — 2% skeins, but at least two;
to test the hardness of not less than three skeins of the party.
Party tape consisting of a bundle of different heats of steel, is subjected to 100% testing of tensile and hardness.
(Changed edition, Rev. N 2).
2A.4. If unsatisfactory test results of at least one of the indicators it is carried out re-tests on twice the number of coils not being tested.
The results of repeated tests apply to the entire party.
Sec. 2A. (Added, Rev. N 1).
3. TEST METHODS
3.1. (Deleted, Rev. N 1).
3.2. The thickness and width of ribbon, size of defects is measured by using micrometers (GOST 6507) and other means of measuring the respective accuracy.
The size of the defects is determined by the destruction of its sweep, followed by a comparative measurement in the stripped and unstripped areas.
The quality of the surface and the edges checked visually without the use of magnifying devices. The differences in the assessment of control is carried out visually on the samples taken from the two ends of a coil after hot pickling them in a 50% aqueous solution of hydrochloric acid (GOST 3118) at a temperature of 60−70 °C for 5−10 min or other solutions and conditions with obtaining of identical results.
If necessary, use magnifying glass with five times magnification.
(Changed edition, Rev. N 2, 3).
3.3. From each coil selected for definition of mechanical properties and hardness, must be taken one sample from both ends of a coil.
Check Rebrovo curvature produced in any place of a coil, but not closer than 2 m from the ends.
Note. Party tape consisting of a bundle of different heats of steel, is subjected to a 100% tensile test and hardness.
(Changed edition, Rev. N 1).
3.4. Chemical composition of steel must verify the certificate of the manufacturer of the metal. Chemical composition shall be determined in accordance with GOST 12344, 12345 GOST, GOST 12346, 12347 GOST, GOST 12348, 12350 GOST, GOST and GOST 12352 12355 or other methods providing the required accuracy.
______________
* On the territory of the Russian Federation GOST 12344−2003. — Note the manufacturer’s database.
(Changed edition, Rev. N 3).
3.5. Test of rupture strength is carried out according to GOST 11701.
3.6. Hardness test according to GOST 9013 on samples with a length of 50−70 mm after quenching and tempering on the site, stripped to a depth of no more than 0.1 mm, in the middle of the flat surface of the tape.
For quenching samples heated to 840−860 °C and after holding at this temperature for 1.5 min for each millimeter of thickness of the tape is quenched in oil. Hardened samples are subjected to release at 180 °C delayed at least 2 hours.
(Changed edition, Rev. N 1).
3.7. Camber shall be checked by combining the edges of the sample tape with a length of 1 m with a straight line. The measurement is performed in the place of the greatest curvature of the ruler according to GOST 427или other means of measurement, corresponding to the accuracy.
(Changed edition, Rev. N 2).
3.8, 3.9. (Deleted, Rev. N 1).
4. PACKING, MARKING, TRANSPORTATION AND STORAGE
4.1. (Deleted, Rev. N 2).
4.2. Every roll of ribbon should be tied in at least three places by a flexible wire or tape according to GOST 3282, GOST 3560, or other regulatory-technical documentation.
(Changed edition, Rev. N 1).
4.3. The tape is coated with a thin layer of rustproof oil: a mixture of GSD and industrial oil-12A AND I-20A GOST 20799 in the ratio of 1:1 mixture of the preservative oil NG-or NG 203A-203B for OST 38.01436 and industrial oil-12A AND I-20A GOST 20799 in 1:1 ratio. Allowed other types of preservative oils that protect the strips from corrosion.
(Changed edition, Rev. N 2, 3).
4.4. Coils of tape should be wrapped with a layer of paper, then a layer of polymeric film or fabric and tied with a soft wire or tape according to GOST 3282, GOST 3560, or other regulatory-technical documentation.
The quality of packaging materials used:
the waxed paper according to GOST 9569*;
______________
* On the territory of the Russian Federation GOST 9569−2006. — Note the manufacturer’s database.
paper double-layered wrapping according to GOST 8828;
the waxed paper according to GOST 8273 or the other, providing protection from corrosion — according to normative-technical documentation;
the polymeric film according to GOST 10354, GOST 16272 or the other according to normative-technical documentation;
container holstoproshivny canvas — according to normative-technical documentation and other types of packing fabrics that do not deteriorate the quality of the packaging (except for cotton and linen fabrics), — according to normative-technical documentation, as well as stitched flap from the waste of the textile industry.
(Changed edition, Rev. N 1, 2, 3).
4.4. Each ball must be attached to the label, which indicate:
trademark and (or) the name of the manufacturer;
the symbol of the tape;
grade of steel;
stamp of technical control.
(Added, Rev. N 2, 3).
4.5. Transport marking under GOST 14192.
While in transport the marking is allowed the gross weight and net weight per package (coil, box etc.) to the gross weight of the party.
(Changed edition, Rev. N 1, 3).
4.6. The tape is transported by all kinds of transport in accordance with cargo carriage regulations applicable to transport of this species.
Consolidation packages in overpacks shall be conducted in accordance with the requirements of GOST 24597 and GOST 21650.
(Changed edition, Rev. N 1, 2, 3).
4.7. Storage tape should be conducted in accordance with conditions 2 GOST 15150.
(Changed edition, Rev. N 1, 3).
