GOST 4121-96

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  ГОСТ 4121-96

GOST 4121−96 crane Rails. Specifications

GOST 4121−96

Group B22

INTERSTATE STANDARD

CRANE RAILS

Specifications

Crane rails. Specifications

ISS 45.080
OKP 09 2130

Date of introduction 2002−07−01

Preface

1 DEVELOPED by Ukrainian research Institute (MTC 327)

SUBMITTED to the State Committee of Ukraine for standardization, Metrology and certification

2 ADOPTED by the Interstate Council for standardization, Metrology and certification (Protocol No. 9 dated April 12, 1996)

The adoption voted:

The name of the state	The name of the national authority for standardization
The Republic Of Azerbaijan	Azgosstandart
The Republic Of Belarus	Gosstandart Of The Republic Of Belarus
The Republic Of Kazakhstan	Gosstandart Of The Republic Of Kazakhstan
The Republic Of Moldova	Moldovastandart
Russian Federation	Gosstandart Of Russia
The Kyrgyz Republic	Kyrgyzstandard
The Republic Of Tajikistan	Tajikstandart
Turkmenistan	The MDCSU «Turkmenstandartlary"
The Republic Of Uzbekistan	Standards
Ukraine	Gosstandart Of Ukraine

3 Resolution of the State Committee of the Russian Federation for standardization and Metrology dated December 18, 2001 N 536-St interstate standard GOST 4121−96 introduced directly as state standard of the Russian Federation from July 1, 2002

4 REPLACE GOST 4121−76

5 REISSUE. September 2009

1 Scope

This standard applies to steel crane rails of special types of profiles KR70, KR80, KR100, KR120, KR140, used to the ways of cranes.

Requirements of 3.4, 3.6 and the last paragraph of 4.4 are recommended.

2 Normative references

The present standard features references to the following standards:

GOST 1497−84 (ISO 6892−84) Metals. Test methods tensile

GOST 7565−81 (ISO 377−2-89) Iron, steel and alloys. Sampling method for determination of chemical composition

GOST 7566−94 metal Products. Acceptance, marking, packing, transportation and storage

GOST 9012−59 (ISO 410−82, ISO 6506−81) Metals. Method of measuring hardness Brinell hardness

GOST 12359−99 (ISO 4945−77) Steels carbon, alloyed and high alloy. Methods for determination of nitrogen

GOST 22536.0−87 carbon Steel and unalloyed cast iron. General requirements for methods of analysis

GOST 22536.1−88 carbon Steel and unalloyed cast iron. Methods for determination of total carbon and graphite

GOST 22536.2−87 carbon Steel and unalloyed cast iron. Methods of determining sulphur

GOST 22536.3−88 carbon Steel and unalloyed cast iron. Methods for determination of phosphorus

GOST 22536.4−88 carbon Steel and unalloyed cast iron. Methods for determination of silicon

GOST 22536.5−87 (ISO 629−82) carbon Steel and unalloyed cast iron. Methods for determination of manganese

GOST 22536.6−88 carbon Steel and unalloyed cast iron. Methods for determination of arsenic

GOST 22536.7−88 carbon Steel and unalloyed cast iron. Methods for determination of chromium

GOST 22536.8−87 carbon Steel and unalloyed cast iron. Methods for determination of copper

GOST 22536.9−88 carbon Steel and unalloyed cast iron. Methods for determination of Nickel

3 Main parameters and dimensions

3.1 Cross-section of rails shall be those specified in figure 1.

Figure 1

3.2. The dimensions of rails, the cross-sectional area, reference values and weight of 1 m shall be as specified in tables 1 and 2.


Table 1

In millimeters

Type of rails
KR70	70,0	75,6	120,0	21,0	23,0	120,0	28,0	24,0	6,0	9,00	21,375	400,0	25,0	25,0	6	6	1,5
KR80	80,0	87,0	130,0	26,0	28,0	130,0	35,0	26,0	10,0	9,75	22,750	400,0	30,0	30,0	8	6	1,5
KR100	100,0	108,0	150,0	32,0	34,0	150,0	40,0	30,0	11,5	11,25	22,250	450,0	35,0	35,0	8	8	2,0
KR120	120,0	129,0	170,0	38,0	40,0	170,0	45,0	35,0	13,0	13,75	31,150	500,0	40,0	48,0	8	8	2,0
KR140	140,0	150,0	170,0	56,0	58,0	170,0	50,0	40,0	14,0	18,75	35,000	700,0	40,0	50,0	10	10	3,0

Table 2

		Reference data for the axes X-X and y-y
Type Rel — owls	The cross-sectional area of rail, cm	Distance to center of gravity cm		The moments of inertia, cm			Moments of resistance, cm				Weight of 1 m Rel — sa kg
KR70	58,72	5,77	6,23	1040,18	281,71	1321,89	180,26	166,95	46,95	160,00	46,10
KR80	76,19	6,42	Of 6.58	1504,57	438,96	1943,53	234,35	228,65	67,53	214,18	59,81
KR100	105,85	7,55	Of 7.45	2768,43	858,99	3627,42	366,67	371,60	114,53	343,83	83,09
KR120	144,54	8,65	8,35	4754,83	1596,08	6350,91	549,69	569,43	187,76	527,92	113,47
KR140	180,51	8,70	8,30	5486,19	2484,75	7970,94	630,59	660,98	292,32	662,04	141,70
Note — the Area of cross section and reference values calculated based on nominal sizes. When calculating the mass of 1 m of rail, the density of steel is taken equal to 7850 kg/m.

3.3 Rails are made of-length:

— dimensional — 9,0; 9,5; 10,0; 10,5; 11,0; 11,5; 12,0 m;

— random — from 4,0 up to 12,0 m.

The length of the rails stipulate in the order.

In coordination with the consumer the rails are made of a different size.

3.4 Rails are made without bolt holes. In coordination with the consumer the rails are made with holes on one or both ends.

3.5 tolerances for the dimensions of the rails shall not exceed those specified in table 3.


Table 3

In millimeters

Type of rails	Maximum deviations in the accuracy of rolling
	the width of the head	the width of the sole		the height of the rail		the length of the measuring rail
		high	normal	high	normal
KR70	+1,0	+1,0	+1,0	±0,8	±1,0	+50
KR80	To 2.0	-2,5	Is 3.0
KR100
KR120	+1,0	+1,0	+1,0	±0,8	±1,2	+50
KR140	-2,5	Is 3.0	-3,5
Notes
1 Sizes which are not indicated limit deviations, given to construct calibers and controlled during cutting.
2 allowed reducing the size and 2%, when cutting calibers on the rolls.

3.6 Deviation from the symmetry of the cross section of the rail relative to the vertical axis shall not exceed in the sole 2 mm, head 0.6 mm.

3.7 designation of the rails must contain the name of products, type of rail, the degree of accuracy of rolling (A — conventional, B — increased) and the designation of the standard.

Example of designation of the rail with a nominal width of head = 100 mm normal accuracy of rolling:

Rail KR100-AND-GOST 4121−96.

4 Technical requirements

4.1 Rails shall be made of carbon steel grade 63, the chemical composition of which plavonia analysis should be those specified in table 4.


Table 4

Percentage

Steel grade	Mass fraction of elements
	Carbon	Manganese	Silicon	Sulfur	Phosphorus	Arsenic	Chrome	Nickel	Copper
				no more
63	0,53−0,73	0,60−1,00	0,15−0,35	0,050	0,050	0,08	0,30	0,30	0,30
Notes 1. Mass fraction of chromium, Nickel, copper and arsenic in steel is provided by the manufacturer and is determined by the requirement of the user. 2. In coordination with the consumer the mass fraction of carbon should be in the range of 0.54−0.72 percent, mass fraction of sulfur and phosphorus shall not exceed 0,045% (of each element).

4.2 tolerances for chemical composition of steel rails is ready from the limits specified in table 4 shall be %:

	carbon —	+0,03 -0,02
	manganese —	+0,03 -0,03
	silicon	+0,03 -0,02
	phosphorus	+0,005
	sulfur	+0,005

4.3 Mass fraction of nitrogen in the finished steel rails shall not exceed 0.008%.

4.4 Mechanical properties of rails shall be as specified in table 5.


Table 5

Temporary resistance , N/mm(kgf/mm)	Yield strength , N/mm(kgf/mm)	Elongation , %	The hardness of the running surface of rail head,
not less than
730 (75)	370 (38)	6,0	212

Mechanical properties including hardness, determined by the condition that the mass fraction of carbon in the melt at the lower limit and (A+¼MP)<0.72%, and also at the request of the consumer.

When the mass fraction of carbon in the melt above the lower limit and (A+¼MP)to 0.72% of the mechanical properties in accordance with the standards specified in table 5 provided by the manufacturer without testing.

At the customer’s request surface hardness of rail head should be between 321 to 390 without standardization of elongation.

4.5 Cracks, sunsets, rolling films, flaws and rolled out contamination on the surface of the rails is not permitted. Remove defects shallow cutting or Stripping if the cutting depth, measured from the actual size, does not exceed:

— for rails and types KR70 KR80 — 1.5 mm, and in the middle third of the width of the sole — 0.7 mm;

— types of rails KR100, KR120 and KR140 — 2 mm, and in the middle third of the width of the sole — 1 mm.

Cross-cutting, welding defects are not allowed. Rolled bubble, risks, dents and Rabina permitted without Stripping, if the depth does not exceed half of tolerance specified for the depth of cut.

4.6 End surface of the rail should not have traces of shrinkage, delamination and cracks.

4.7 the Flocs in the rails is not permitted.

4.8 Local deformation to the rail should not exceed 1 mm in length by 0.5 m.

4.9 Deviation from straightness of the rail must not exceed: in the horizontal plane — 0,08%, in the vertical plane, 0.06% in length.

4.10 Torsion of the rail is not allowed. Rails twisted think, if the measurements at the test rack they have at the ends of the gaps between the rail and the rack (measured diagonally) more than 1.5 mm.

4.11 the Curvature of the rail ends to a length of 1 m must not exceed 2 mm in the horizontal and vertical planes.

4.12 Sole rails must not be concave. The General convexity of the sole and convexity in the middle part of the sole, equal to the width of the head shall not exceed the values given in table 6.


Table 6

In millimeters

Type of rails	The bulge in the accuracy of rolling and in agreement with the consumer
	common			in the middle part of the sole
	high	normal	by agreement between manufacturer and consumer	high	normal	by agreement between manufacturer and consumer
	no more
KR70	1,20	1,25	1,20	0,40	0,50	0,40
KR80	1,45	1,50	1,45	0,50	0,60	0,50
KR100	1,70	1,75	1,70	0,70	0,80	0,70
KR120	1,95	Of 2.00	1,95	0,80	0,90	0,80
KR140	2,45	2,50	2,45	0,90	Of 1.00	0,90

4.13 the rail Ends should be trimmed evenly. The deviation from perpendicularity of the end planes relative to the longitudinal axis shall not exceed 5 mm in any direction. Burrs larger than 4 mm are not allowed.

4.14 In agreement with the consumer, the rails having on the ends of the ledges and nodules, is subjected to milling or other processing ends.

4.15 Labeling and packaging

4.15.1 On the neck of each rail in a hot condition must be wakatani convex letters and numbers, meaning:

— the symbol of the manufacturer;

— rail type.

Additionally needs to be embossed: at the end of the sole of each rail — room trunks, and at the end of the head — stamp confirming the acceptance of products by the technical control.

4.15.2 Rails indelible mark with white paint by the stroke of the stigma of the contour of the end face of the rail head.

4.15.3 In coordination with the consumer the rails can be shipped both individually and tightly associated into bundles with cross metal strapping tape or steel wire in five places.

5 acceptance Rules

5.1 the Rails take parties. The party believe the rails are of one type and one swimming trunks, on which issue one document about quality.

5.2 To check the quality of rails from the party taken:

— for chemical analysis — one sample;

— mechanical test — one rail;

— to test the hardness of one rail;

— to check on the flocs — one sample from each fiftieth heat.

Check the appearance and dimensions are subjected to each rail.

If unsatisfactory results at least one indicator of a re-test is carried out on a sample selected according to GOST 7566. The results of the validation control tests the flocs are final after the first test.

5.3 a quality document additionally indicate the accuracy of rolling.

6 test Methods

6.1 determination of the chemical composition of the steel according to GOST 12359, GOST 22536.0 to GOST 22536.9.

6.2 Sampling to determine the chemical composition of the steel according to GOST 7565.

6.3 For tensile testing and hardness from each selected rail cut on the same model.

6.4 the tensile Test is carried out according to GOST 1497 on the round samples with a diameter of 10 mm and the estimated length of 50 mm. a blank for the sample cut from the upper corner of the rail head of one of the rolls of the tested party.

6.5 the Hardness is determined on the surface of the rail according to GOST 9012.

6.6 the dimensions of the rails and a local deformation on the rail check of the measuring tool necessary accuracy.

6.7 surface Quality of rails is determined visually.

6.8 inspection of rails, revealing the absence placenow, conducted by the method of the manufacturer.

6.9 the Presence of bundles on the ends of test cutting with a chisel, chip, split which is a sign of stratification.

7 Transportation and storage

7.1 Transportation and storage rails, documentation — GOST 7566.