GOST 8319.0−75

Group B22

INTERSTATE STANDARD

STEEL SECTIONS HOT-ROLLED
LONGITUDINAL ROLLING

Specifications

Hot-rolled steel periodical lengthwise-rolled sections. Specifications

OKP 09 3001

Date of introduction 1977−01−01

The decision of the State Committee of standards of Ministerial Council of the USSR from December 29, 1975 N 4063 date of introduction is established 01.01.77

The expiration time limit is removed by the Resolution of Gosstandart from 20.05.91 N 709

REPLACE GOST 8319−57

EDITION with Change No. 1, approved in December 1986 (IUS 3−87)

This standard applies to hot-rolled steel periodic profile longitudinal rolling, to be used as blanks for the production of car axles, trailer axles, automobile crankshaft, front arm lining coal mining complex and similar in configuration details.

Indicators of technical level established by this standard are intended for the highest quality.

The quality is determined based on the quality of the steel used for the manufacture of profiles.

(Changed edition, Rev. N 1).

1. TECHNICAL REQUIREMENTS

1.1. The periodic profiles are produced in accordance with the requirements of this standard for technological regulations approved in the prescribed manner.

(Changed edition, Rev. N 1).

1.1. Periodic profiles are made of carbon steel and alloy structural steel grades specified in table.1.

Table 1

1.1 b. Chemical composition of steel and allowable deviation for chemical composition shall conform to the standards GOST 4543−71 and GOST 1050−88.

1.1 V. the yield strength and ultimate strength shall conform to the standards specified in table.2.

Table 2

1.1 a-1.1 (Introduced later, Rev. N 1).

1.2. Periodic profiles of the heat treatment is not subjected.

1.3. The hardness of periodic structures shall not exceed 241 HB.

1.4. The dimensions of the profiles and limit deviations according to him — according to GOST 8319.2−75, GOST 8319.4−75 — GOST 8319.6−75, GOST 8319.8−75, GOST 8319.11−75 — GOST 8319.13−75.

1.5. Profiles are produced in the form of bars of length equal to the length of one or more periods. The maximum number of periods in the rod must conform to the GOST 8319.2−75,GOST 8319.4−75 — GOST 8319.6−75, GOST 8319.8−75, GOST 8319.11−75 — GOST 8319.13−75.

1.4, 1.5. (Changed edition, Rev. N 1).

1.6. Each period in the profile of the rod shall be separated by transverse dividing mark in the form of a protrusion or depression.

1.7. Incomplete the length of the periods at the ends of the profiles must be cut at separation mark.

Allowed 15% of the periods of the party with an allowance of 20 to 100 mm from the separation mark.

10 per cent of the periods of the party with an allowance of 20 to 50 mm from the separation marks on the profile for the front axle of the GAZ-53−12.

1.8. The profiles used for cold machining, the size of burrs shall not exceed 10 mm.

The profiles are intended for hot forming, burrs are removed at the request of the consumer.

1.7, 1.8. (Changed edition, Rev. N 1).

1.9. At the ends of the profiles should not be bundles, traces of shrinkage, mihloti and internal non-metallic inclusions that are visible without using the magnifying devices.

1.10. Cocina cutting profiles should not display the total length of the period beyond the negative maximum deviations.

1.11. The ultimate width and thickness of the whisker on the profile is specified in GOST 8319.2−75, GOST 8319.4−75 — GOST 8319.6−75, GOST 8319.8−75, GOST 8319.11−75 — GOST 8319.13−75.

(Changed edition, Rev. N 1).

1.12. Moustache, surface defects and burrs of the profile ends should be removed by mechanical means.

1.13. On the surface profiles is intended for hot forming, defects in rolled out view of bubbles, cracks, rolling shells, sunsets and non-metallic inclusions are not allowed.

1.14. On the surface profiles designed for cold mechanical processing, allowed a single, rolled, bubbles, shells, footprints and risks, the depth of which does not show the size of the profile beyond the negative deviations.

1.15. Surface defects on profiles should be removed by gentle cutting or Stripping.

The width of the cutting or Stripping shall be not less than five times the depth.

The width of the cutting or Stripping the profile for the front axle of the GAZ-53−12 should be not less than six times depth.

The depth of Stripping defects on the profiles used for hot forming, should not exceed the half-sum of limiting deviations of the corresponding size.

The cleaning depth of defects measured from the actual size of the profile.

The depth of Stripping defects on the profile for the front axle of the GAZ-53−12 should take the size of the profile beyond the negative deviations.

The depth of Stripping defects on the profiles used for cold machining, should take the size of the profile beyond the negative deviations.

On the surface of the profiles allowed individual risks, the prints and Rabina within half the tolerance, as well as single rolled bubbles, not exceeding the tolerance, but not more than 0.20 mm.

1.16. Profiles are not subjected to editing.

The curvature of one period should not exceed 0,015 length.

1.17. Allow the execution of cross sections and longitudinal contour of the profile in accordance with GOST 8319.2−75, GOST 8319.4−75 — GOST 8319.6−75, GOST 8319.8−75, GOST 8319.11−75 — GOST 8319.13−75.

1.18. Limit values of longitudinal and transverse displacements of the contours shall be as specified in GOST 8319.2−75, GOST 8319.4−75 — GOST 8319.6−75, GOST 8319.8−75, GOST 8319.11−75 — GOST 8319.13−75.

1.19. Profile for the front axle of the GAZ-53−12 shall be tested for sediment in the hot state.

1.15−1.19. (Changed edition, Rev. N 1).

1.20. The macrostructure of the etched on templeto should not have shrinkage, rychlosti, bubbles, delaminations, internal cracks, internal non-metallic inclusions and placenow visible without using the magnifying devices.

2. ACCEPTANCE RULES

2.1. Profiles accepted by the parties. The party must consist of a profile made of steel in one melting-ladle.

Allowed by agreement between manufacturer and user delivery profiles of the same size in batches.

The national party can consist of a profile made of no more than four heats. The difference in carbon content in trunks team of the party of not more than 0.03%, manganese content of 0.15% by bucket sample.

2.2. To check the quality of profiles taken from the party:

for tensile tests — two rods;

testing the hardness of five bars;

to test hot upset — three rods;

to control the microstructure of the two rods;

to check the quality of the surface and size — all bars.

2.3. 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 the same batch. The results of repeated tests are final and apply to the entire party.

3. TEST METHODS

3.1. From each selected rod cut off:

for tensile tests — two samples;

testing the hardness of one sample;

to control the macrostructure of two sample;

to test hot upset — two samples.

3.2. Selection of samples for mechanical tests according to GOST 7564−97.

Samples taken at the portion of the profile having the largest cross-sectional area.

3.3. The tensile test is carried out according to GOST 1497−84.

3.4. The hardness is determined according to GOST 9012−59.

3.5. Test hot upset is carried out according to GOST 4543−71.

3.6. Control of macrostructure by etching is produced according to GOST 10243−75. Allowed to apply the methods of ultrasonic testing according to GOST 12503−75 the original billet for rolling of profile taken from the head and bottom parts of one of the bars of each tray.

3.7. The surface quality of the profiles checking without the use of magnifying devices.

To determine the depth of the defects produce a control cutting or Stripping.

3.8. The size of the profile check of the measuring tool necessary accuracy.

3.9. Control of the height profile is produced on plots of constant cross section to length of the middle part.

Control the width of the profiles is produced in sections that do not have a mustache.

4. MARKING, PACKAGING, TRANSPORTATION AND STORAGE

4.1. Marking, packaging, transportation and storage is carried out according to GOST 7566−94.

(Changed edition, Rev. N 1).

4.2. Profiles are Packed in bundles weighing up to 5 tons.

By agreement between the manufacturer and the consumer packaging profiles in bundles weighing up to 10 tons Each bundle shall consist of sections of one party.

4.3. Profiles in bundles must be tightly and firmly tied with wire in the transverse direction in at least two places.

Allowed packing in one set of profiles with different number of periods.

Profiles with an allowance should be tied in separate bundles by the ends with the seam allowance to one side.

4.4. The profile ends must be marked with indelible ink. The paint color is set by the manufacturer.