BS 47-1:1991 download.Fishplates for railway raIlS Part l : Specification for rolled steel fishplates.
1 Scope
This Part of BS 47 specifies the chemical composition and tensile property requirements for the steel used, and the dimensions and tolerances of rolled steel fishplates intended for use with railway rails of linear mass equal to or greater than 24.8 kg/rn (50 Ib/yd).
The provisions of this specification are not restricted to fishplates for use with rails that comply with BS ii and may be applied to fishplates for any rail section of 24.8 kg/rn (50 lb/yd) or greater linear mass.
NOTE 1 Whilst BS 47-1 does not specify requirements for forged or cast fishplates some of its provisions may be applied to such products where appropriate.
NOTE 2 Recommended batch inspection procedures are described in Appendix A. The section properties are given for information in Appendix B. Information to be supplied by the purchaser is given in Appendix C.
NOTE 3 The titles of the publications referred to in this standard are listed on the inside back cover.
2 Manufacture
2.1 Manufacture of steel
The source of the steel and the steelmaking process shall be the responsibility of the manufacturer of the flshplates. If requested by the purchaser at the time of enquiry the manufacturer shall describe the source of steel supply and the steelmaking and casting processes employed. The manufacturer shall not alter these without the agreement of the purchaser.
2.2 Manufacture of fishplates
The fishplates shall be manufactured from a hot rolled section, cut to length and holed in accordance with clause 9.
Sufficient crop shall be taken to ensure that end defects are removed.
The rolling and fishplate finishing processes shall be the responsibility of the manufacturer. If requested by the purchaser at the time of enquiry or order the manufacturer shall describe the rolling and fishplate finishing processes employed. The manufacturer shall not alter these without the areernent of the Durchaser.
3 Chemical composition
When tested in accordance with clause 11 the chemical composition of the steel shall comply with the limits given in Table 1.
In the event of dispute, analyses shall be carried out by the appropriate methods described in BS 6200 and BSI Handbook No. 19.
NOTE The chemical composition and mechanical property requirements of grade 080M40 or grade 00M36 of BS 970.1:1983 may be specified by the purchaser.
4 Dimensions and properties
Dimensions and properties for all fishplates shall be in accordance with Table 2 (see also Figure 1 and Figure 2). In addition, dimensions and properties for all fishplates ordered for use with a BS rail section number shall be in accordance with the values in Table 3 and Table 4 (see also Figure 3) and Figure 4 to Figure 23.
NOTE 1 With the exception of the fishplate for the 1 13A rail, all fishplates were designed in imperial units. The drawings for these fishpiates are therefore shown in imperial units. For the convenience of users some data are also shown in metric units. NOTE 2 The section properties are given for information in Appendix B.
5 Marking
Brand marks shall be rolled in relief in such a position, clear of the bearing of the fishbolt head and nut, that the following information can be seen when the fishplate is fixed in position:
a) the identity of the rail section to which the
fishplate belongs;
b) the identification mark of the manufacturer;
c) the last two figures of the year of manufacture. Each element of the brand mark shall be separated by a hyphen of minimum length 0.7 times the height of the brand letters and numbers.
Example
BS95R—X& Co—90
6 Tensile properties
When tested in accordance with clause 12 the tensile strength and elongation of the steel shall comply with the following.
Tensile strength Minimum elongation
(Gauge length 5.65 !S)
2 OI
N/mm
600± 50 18
where
S0 is the cross-sectional area of the test piece (in mm2).
NOTE Where the purchaser specifies the use of a grade of steel complying with BS 970.1 then the associated tensile property requirements of this grade are applicable (see clause 3).
7 Templates and working gauges
The manufacturer shall make available to the purchaser a set of clearly identified master templates, internal and external, for the section of fishplate ordered and shall obtain the purchaser’s approval of them before rolling of the fishplate section begins. The master templates shall be made available on request for the checking of working gauges.
In addition to the master templates, the manufacturer shall make available go and no-go working gauges incorporating the dimensional tolerances given in Table 2.
NOTE The same master templates may be used by several purchasers (see item b) of Appendix C).
8 Freedom from defects
Fishplates shall be free from manufacturing defects adversely affecting their performance in service.
No manufacturing operations shall be carried out with the object of concealing defects.
NOTE Minor surface defects may be removed using a method approved by the purchaser.
9 Finishing
9.1 Straightness
The straightening operation shall be carried out with gradual pressure and without impact.
9.2 Fishplate length
The significantly rolled bars used shall be cut to length by any suitable method which does not deform the section or change the properties of the steel. Each cut shall be clean and free from burrs.
9.3 Bolt holes
One or more of the following methods shall be used for producing the holes:
drilling;
hot punching; machining.
All necessary precautions shall be taken to ensure that the fishing surfaces are not significantly deformed or the steel impaired. The dimensions of the hole shall remain within the tolerances given in Table 2.
Burrs resulting from these operations shall be removed.
10 Tolerances
The tolerances of rolled bar and finished fishplate
shall comply with Table 2.
11 Chemical analysis
11.1 Ladle analysis
The chemical composition of each cast of steel shall be determined by representative ladle analysis and shall comply with the requirements of clause 3. If the result of the ladle analysis does not comply, all fishplates from that cast or part cast shall be deemed not to comply with this standard, subject to the provisions of 11.2.
NOTE Determination may be made chemically. spectrographically or by other accepted modern instrumental methods.
11.2 Product analysis
Should the result of the ladle analysis fail to comply with the requirements of clause 3. or should the purchaser require it (see item d) of Appendix C) the manufacturer shall make tests on two separate product samples from the cast or part cast.
If the results of these tests comply with the product analysis requirements in clause 3 the cast or part cast shall be accepted. If one or both of the test pieces fail, the cast or part cast shall be rejected.
12 Tensile tests
12.1 Method of test
The manufacturer shall determine the tensile properties of the steel in accordance with BS 18 using a standard circular cross section tensile test piece.
12.2 Number of tests
One tensile test shall be carried out on each type of fishplate per cast for casts of 50 tonnes or less. For larger casts, one test shall he carried out for each additional 50 tonnes or part thereof.
14 Inspection
The manufacturer shall inspect all batches of fishplates and ensure that they comply with this Part of BS 47. All non-conforming batches shall be clearly marked.
NOTE I Recommended inspection procedures are described in Appendix A.
The inspection or quality assurance system to he applied shall be defined at the time of enquiry or order (see item e) of Appendix C) and shall be based on one of the following.
a) The purchaser shall require the manufacturer to take responsibility for quality assurance based on a procedure in compliance with BS 5750.
b) Alternatively, the purchaser shall be advised in advance by the manufacturer of the dates of rolling, of sample selection and of mechanical testing of the test pieces to enable the purchaser to witness these procedures. The purchaser shall also be advised by the manufacturer of the availability of the finished product for inspection.
The purchaser shall have access during working hours to observe the manufacturing process and to inspect the finished product.
NOTE 2 Any batches which do not comply should be sorted before submission for the purchaser’s inspection.