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cold drawing norms (downloaded fm net)

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U.D.C.: 669.14-426.

December 1987

Non-alloy steel wire rod for cold drawing and/or cold rollingThis EURONORM replaces EURONORM 16-70 and EURONORM 15-70.

EURONORM

16-87

CONTENTS

SECTION I:

General requirements

2

SECTION II: Specific requirements for basis steel and quality steel wire rod SECTION III: Specific requirements for special steel wire rod

7 11

Only the last edition of the EURONORMS quoted is valid

Copyright by the Standardization Offices of the European Communities' Member States

Non-alloy steel wire rod for cold drawing and/or cold rollingGeneral requirements CONTENTSPage

EURONORM Section I

16

1.1 1.2 1.3 1.4 1.5 1.6

FIELD OF APPLICATION DEFINITION REFERENCES DESIGNATION INFORMATION TO BE SUPPLIED AT THE OF ORDERING MANUFACTURING PROCESS 1.6.1 Steel-making process 1.6.2 Product-making process

3 3 3 3 3 3 3 3 3 4 4 4 4 4 4 4 4 4 4 4 4 5 5 5

1.7 1.8 1.9

CLASSIFICATION DIMENSIONS, MASS AND TOLERANCES REQUIREMENTS 1.9.1 General 1.9.2 Method of delivery 1.9.3 Delivery condition

1.10 INSPECTION 1.10.1 Documents and agreements relating to inspection 1.10.2 Extension of inspections 1.10.3 Inspection unit and number of samples and test pieces 1.10.4 Inspection of chemical composition 1.10.5 Inspection of decarburization, surface defects, non-metallic inclusions and axial segregation 1.10.6 Testing 1.10.7 Re-tests 1.11 1.12 MARKING CLAIMS

Only the last edition of the EURONORMS quoted is valid

Copyright by the Standardization Offices of the European Communities' Member States

Page 3

LI

FIELD OF APPLICATION

1.4.2 Designation of wire rod comprises the following information in order: product (wire rod); cross-section; dimensions; steel grade; reference to this EURONORM. Example of the designation of a wire rod of round crosssection, with a diameter of 16 mm, in 3 CD 55 steel:

1.1.1 This EURONORM applies to non-alloy steel rod (wire rod) for cold drawing and/or cold rolling. The cross-section of the wire rod may be circular, square, rectangular, hexagonal, octagonal, half-round or any other shape and, as a general rule, be of nominal dimension equal to or greater than 5 mm (see EURONORM 17); the surface is smooth. 1.1.2 It does not apply to products for which specific standards already exist, such as: steel wire rod for heat treatment (see EURONORMS 83, 84, 85 and 86); free cutting steel wire rod (see EURONORM 87); steel wire rod for cold heading and cold extrusion (see EURONORM 119); wire rod for the manufacture of electrodes and welding products (see EURONORM 133). 1.1.3 This section applies to general requirements.

Round wire rod 16 3 CD 55 EURONORM 16

1.5 INFORMATION TO BE SUPPLIED AT THE OF ORDERINGThe purchaser shall give the following information at the time of ordering in order to make it possible for the supplier to comply satisfactorily with the requirements of this EURONORM: designation (see 1.4.2); quantity;

1.2

DEFINITION

dimensions and mass of the coils; surface condition (where it would be other than the as-rolled state); where applicable, the type of tying and labelling; where applicable, the type of certificate and inspection (see EU 21); if the wire rod is intended for bright drawing this shall be specified; for information, the type of descaling (chemical or mechanical).

For the definition of'rod' see EURONORM 79.

1.3

REFERENCES

EURONORM 17 Wire rod in general purpose non-alloy steel for cold drawing or bright drawing dimensions and tolerances EURONORM 18 Selection and preparation of samples and test pieces for iron and steel products EURONORM 20 - Definition and classification of the grades of steel EURONORM 21 General technical delivery conditions for steel and iron and steel products EURONORM 27 - Designation of steels EURONORM 79 - Definition and classification of steel products by shape and dimensions EURONORM 104 - Determination of depth of decarburization of non-alloy and low alloy structural steels

1.6

MANUFACTURING PROCESS

1.6.1 Steel-making processThe steel-making process shall be at the discretion of the manufacturer, but it shall be made known to the purchaser on request, except for the basis quality.

1.6.2 Product-making processThe product-making process of the product shall be at the discretion of the manufacturer, but it shall be made known to the purchaser on request.

1.4

DESIGNATION

1.7

CLASSIFICATION

1.4.1 The designation of the steels covered by this EURONORM is in accordance with EURONORM 27.

Classification of the steel grades covered by this standard into non-alloy steels on the basis of the chemical composi-

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tion and the subdivision into basis steels and quality steels (see Section II) and special steels (see Section III) are in accordance with the requirements of EURONORM 20-74.

1.10.1.4 When it is agreed to supply an acceptance certificate, the requirements for quality steels (see Section II) or special steels (see Section III) are applied for the acceptance tests. The manufacturer shall also inform the inspection representative of the results of the ladle analysis, keeping to the elements given in Tables II. 1 and III. 1 _

1.8 DIMENSIONS, MASS AND TOLERANCESFor the dimensions, mass and tolerances, see EURONORM17.

1.10.2 Extension of inspectionsWhen the order is accompanied by a request for an inspection certificate the inspection shall be carried out in accordance with Table 1.1.

1.9

REQUIREMENTS

1.9.1 GeneralIn addition to the requirements of this EURONORM, the general technical delivery conditions for steel and steel products (see EURONORM 21) are applicable, in the absence of other requirements specified in this EURONORM.

1.10.3 Inspection unit and number of samples and test piecesThe inspection unit is composed of all wire rod of the same diameter or equivalent dimension, originating from the same cast. For the number of samples and test pieces the requirements of Table 1.2 apply.

1.9.2 Method of deliveryProducts made of 1 CD 9 steel are only delivered in lots. Products of other steel grades are delivered in casts.

1.10.4 Inspection of chemical compositionWhen verification of the product analysis has been agreed upon, the samples shall be taken and prepared in accordance with EURONORM 18.

1.9.3 Delivery conditionWire rod is delivered in the as-rolled condition, in irregularly wound coils, but which can be unwound in a regular manner during subsequent transformation. Wire rod shall be delivered properly cropped at least at one end.

1.10.5 Inspection of decarburization, surface defects, non-metallic inclusions and axial segregation1.10.5.1 The test pieces shall be taken at an adequate distance from the ends of the coil for the inspection of surface defects, decarburization, non-metallic inclusions and axial segregation. If any re-tests have to be carried out, this distanc shall be at least 5 m for wire rod of diameter or equivalent dimension equal to or less than 7 mm and at least 4 m for wire rod of diameter or equivalent dimension greater than 7 mm. 1.10.5.2 For the determination of decarburization, polished transverse metallographic test pieces are taken for microscopic examination from the wire rod in the as-rolled state and then prepared and etched. For the determination of non-metallic inclusions and axial segregation, the tests shall be carried out on the wire rod in the as-rolled state and in accordance with Sub-clause III.2.5 and III.2.6.

1.10

INSPECTION

1.10.1 Documents and agreements relating to inspection1.10.1.1 Setting aside the limitation specified in Sub-clause 1.10.1.2, the purchaser may request that one of the following documents be supplied to him amongst the documents specified in EURONORM 21. certificate of compliance with the order; test report; inspection certificate. 1.10.1.2 For 1 CD 9 steel, only the certificate of compliance with the order is supplied. 1.10.1.3 When it is agreed to supply a test report, this document shall indicate the results of the ladle analysis, which do not necessarily correspond to the results from the goods supplied, keeping to the elements indicated in Tables II.1 and III.I.

1.10.6 Testing1.10.6.1 Inspection of chemical composition The methods to be applied for verifying the product analysis shall be agreed at the time of ordering by referring to existing EURONORMS where available. For arbitration analyses, the methods shall be agreed at the time of ordering.

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1.10.6.2 Inspection of surface defects 1.10.6.2.1 General Unless otherwise stated at the time of ordering, the selection of methods from the following is left to the discretion of the producer for revealing surface defects. pickling test (see 1.10.6.2.2); magnetic particle test (see 1.10.6.2.3); compression test (see 1.10.6.2.4); alternating torsion test (see 1.10.6.2.5). The specification in Clauses 1.10.6.2.4 and 1.10.6.2.5 shall be taken into account for the field of use of the compression test and the alternating torsion test. The depth of the defects shall be determined on the wire rod in the as-rolled state by means of a filed test piece or by microscopy. In the case of arbitration, microscopic inspec tion shall be carried out. 1.10.6.2.2 Pickling test In the pickling test, a 200 mm length of wire rod in the as-rolled state is immersed as a test piece intended to reveal any surface defects in a sulphuric acid or hydrochlo ric aqueous solution composed, respectively, of 1 volume of sulphuric acid = 1.84 kg/1) and 9 volumes of water; 1 volume of hydrochloric acid (p = 1.19 kg/1) and 1 volum