prEN 10138-4：2000 Prestressing steels Part 4：Bar

EUROPEAN STANDARD NORME EUROPÉENNE EUROPÄISCHE NORMICS 77.140.60 DRAFT prEN 10138-4 September 2000 English version Prestressing steels - Part 4: Bars Armatures de précontrainte - Partie 4: Barres Spannstähle - Teil 4: Stäbe This draft European Standard is submitted to CEN members for enquiry. It has been drawn up by the Technical Committee ECISS/TC 19. If this draft becomes a European Standard, CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this European Standard the status of a national standard without any alteration. This draft European Standard was established by CEN in three official versions (English, French, German). A version in any other language made by translation under the responsibility of a CEN member into its own language and notified to the Central Secretariat has the same status as the official versions. CEN members are the national standards bodies of Austria, Belgium, Czech Republic, Denmark, Finland, France, Germany, Greece, Iceland, Ireland, Italy, Luxembourg, Netherlands, Norway, Portugal, Spain, Sweden, Switzerland and United Kingdom. Warning : This document is not a European Standard. It is distributed for review and comments. It is subject to change without notice and shall not be referred to as a European Standard. EUROPEAN COMMITTEE FOR STANDARDIZATION COMITÉ EUROPÉEN DE NORMALISATION EUROPÄISCHES KOMITEE FÜR NORMUNG Central Secretariat: rue de Stassart, 36 B-1050 Brussels © 2000 CEN All rights of exploitation in any form and by any means reserved worldwide for CEN national Members. Ref. No. prEN 10138-4:2000 E 标准下载网(www.bzxzw.com) com) .bzxzw.Page 2 prEN 10138-4:2000 Contents 1 2 3 4 5 6 7 8 9 Scope Normative references Terms and definitions Designation Manufacture Requirements Evaluation of conformity Test methods Delivery by the manufacturer 4 4 4 4 6 6 9 11 11 标准下载网(www. which is an integral part of Part 1 of this European Standard and by which it becomes a harmonized European Standard. Sweden. Belgium. This European Standard has been prepared under mandate M115 given to CEN by the European Commission and the European Free Trade Association and supports essential requirements of the EU Construction Products Directive (89/106/EEC). Prestressing steels — Part 1: General requirements EN 10138-2. Luxembourg. . the other parts being: EN 10138-1. In accordance with the common rules of CEN/CENELEC the following member countries are obliged to adopt this standard: Austria. Prestressing steels — Part 3: Strand All products placed on the market within the European Union and EFTA must be certificated in accordance with annex ZA of Part 1 of this European Standard. Netherlands. Germany. Greece. Switzerland. Spain. EN 10138 is published in four parts. Portugal. United Kingdom. France. Norway. dimensions. For relationship with the EU Construction Products Directive. Ireland. tolerances and specific tests' of which the Secretariat is held by BSI. Italy. Prestressing steels — Part 2: Wire EN 10138-3. Finland. see informative annex ZA. Czech Republic.Page 3 prEN 10138-4:2000 Foreword This Part of this European Standard has been prepared by SC2 'Prestressing steels' of the Technical Committee ECISS/TC19 'Concrete reinforcing and prestressing steels – Properties. Iceland. Denmark. Steel for the reinforcement and prestressing of concrete — Test methods — Part 3: Prestressing steels 3 Terms and definitions For the purposes of this Part of this European Standard the terms and definitions given in prEN 10138-1 and the following apply. Designation system for steels — Part 1: Steel names. or revisions of. However. constitute provisions of this European Standard. Designation system for steel — Additional symbols prEN ISO 15630-3. plain or ribbed and supplied in either the hot rolled or hot rolled and processed condition. through reference in this text. parties to agreements based on this European Standard are encouraged to investigate the possibility of applying the most recent editions of the normative documents indicated below. For dated references. subsequent amendments to. any of these publications do not apply. the latest editions of the normative document referred to applies. Members of CEN/CENELEC maintain registers of currently valid European Standards. Designation system for steels — Part 2: Steel numbers prEN 10138-1. . EN 10027-1. 4. Prestressing steels — Part 1: General requirements CR 10260. 3. NOTE General requirements are given in Part 1 of this European Standard.2 The designation shall consist of : a) the number of this Part of this European Standard. principal symbols EN 10027-2. the steel numbers shall be allocated in accordance with EN 10027-2. For undated references. 2 Normative references The following normative documents contain provisions which.Page 4 prEN 10138-4:2000 1 Scope This Part of this European Standard gives the specific requirements for preferred sizes of round steel bar in straight lengths.1 For the steel grades covered by this Part of this European Standard the steel names are allocated in accordance with EN 10027-1 and CR 10260.1 unit of product 15 tonnes of bars of a single diameter coming from the same cast of steel 4 Designation 4. e.1380-26-R.EN 10138-4-1. . the letter H for hot-rolled bar .e. the nominal tensile strength in MPa. d) where necessary R for ribbed.EN 10138-4-Y1030H-26-R NOTE The steel number may be used instead of the steel name i. Example EN 10138-4 Y 1030 H 26 R Number of this Part of this European Standard Prestressing steel Nominal tensile strength (MPa) Hot rolled bar Nominal diameter (mm) Ribbed i. c) the nominal diameter of the bar in mm.Page 5 prEN 10138-4:2000 b) the steel name consisting of: 1) 2) 3) the letter Y for prestressing steel. 1 Manufacture General The bar shall be manufactured from steel in accordance with prEN 10138-1 :2000. 5. 5. 5.Page 6 prEN 10138-4:2000 5 5.8 d where d is the nominal bar diameter. The ribs shall have a generally uniform spacing of not more than 0. 6.2 Processing The steel shall be hot rolled into bars. 6. Where subsequent processing is required to achieve the specified mechanical properties. c) additional tempering.4 Welds There shall be no welds in the bar as supplied to the purchaser.3 mm in depth. . 2 and 3. 5.3 Ribs When ribbed bars are supplied.3 Longitudinal defects Longitudinal defects shall not exceed 0.1. the design of the ribs shall be agreed between the manufacturer and purchaser. such processing shall take the following forms either singly or in combination: a) accelerated cooling. 6 6. 6. b) cold stretching.5 Scale Bars covered with a layer of scale shall be acceptable.2 Straightness The deviation from straightness for any length of bar shall not exceed 4 mm/m length.1 Requirements General Nominal and specified properties are given in Tables 1. 1382 1. Fm. is approximately 81 % of the specified characteristic maximum force.ribbed.1381 1. for 1100 MPa and 1030 MPa nominal tensile strength bar and approximately 88 % of the specified characteristic maximum force .1380 1.1380 1.1382 R R P P R P P R P R P R P P R P R P R P R 15 20 25. max kN 224 397 605 629 653 678 953 953 1206 1206 1488 1488 2326 730 760 1110 1110 1400 1400 1730 1730 177 314 511 531 552 573 804 804 1018 1018 1257 1257 1964 531 552 804 804 1018 1018 1257 1257 a The nominal modulus of elasticity may be taken as 205 GPa (kN/mm ) for as rolled and as rolled stretched and tempered bars and the secant 2 modulus between 5 % and 70 % of the specified characteristic maximum force may be taken as 165 GPa (kN/mm ) for as rolled and stretched bars. For ribbed bars the cross-sectional area does not include the non-bearing portion of the ribs.1381 1.1380 1.1380 1.1380 1. 2 f g .1382 1. 3 2 b c d e The specified characteristic 0. for 1230 MPa nominal strength bar.1.5 32 32 36 36 40 40 Rm MPa 1100 1100 1030 1030 1030 1030 1030 1030 1030 1030 1030 1030 1030 1230 1230 1230 1230 1230 1230 1230 1230 Sn mm 2 M g/m 1440 2560 4009 4168 4480 4495 6313 6530 7990 8270 9865 10250 15386 4168 4480 6313 6530 7990 8270 9865 10205 -2% to + 6% Fm kN 194 346 526 547 568 590 828 828 1048 1048 1294 1294 2022 653 678 989 989 1252 1252 1546 1546 Fp0.5 27 32 32 36 36 40 40 50 26 26.5 26 26. R .1 % proof force .85 kg/dm . For ribbed bars the mass includes the ribs and may vary according to the rib profile.Page 7 prEN 10138-4:2000 Table 1 — Dimensions and properties of hot rolled and processed bars Steel Designation Bar surface Diameter f Nominal a Specified Steel Name Steel number Tensile strength g Crosssectional area d Mass b c Permitted deviation on nominal mass Characteristic Characteristic value of maximum force value of 0. P .1380 1.Fp0.1382 1.1380 1.plain. For plain bars the mass is calculated from the nominal cross-sectional area and a density value of 7.1380 1. Fm.1380 1.1 % proof force e Maximum value of maximum force d mm Y1100H Y1100H Y1030H Y1030H Y1030H Y1030H Y1030H Y1030H Y1030H Y1030H Y1030H Y1030H Y1030H Y1230H Y1230H Y1230H Y1230H Y1230H Y1230H Y1230H Y1230H 1.1382 1.1382 1.1382 1.1 kN 159 283 426 443 461 478 672 672 850 850 1049 1049 1640 573 596 869 869 1099 1099 1357 1357 Fm.1380 1.1380 1.1382 1. 1 MPa = 1 N/mm . Agt. Fup. Fr. is 70 % of Fm Number of cycles without fracture = or 6 > 2 x 10 Plain bars Ribbed bars 200 MPa 180 MPa a a a 1 MPa = 1 N/mm 2 .Page 8 prEN 10138-4:2000 Table 2 — Additional requirements for bars Property Minimum elongation at maximum force. where the upper limit.5 % Constriction at break Fatigue force range. with Lo
200 mm Maximum relaxation at 1000 hours For initial force corresponding to 70 % actual maximum force Nominal bar dia Nominal bar dia  15mm > 15mm 6% 4% Ductile break visible to the unaided eye Specification 3. 1% proof force Elongation at maximum force Bend test on a former of diameter 10 d Straightness 1 test per 50 tonnes 1 test per unit of product .1. 7.1 The requirements in prEN 10138-1 :2000. 7.Page 9 prEN 10138-4:2000 Table 3 — Additional requirements for NH4SCN stress corrosion test Diameter d in mm individual tests d = 15 15 <d  25 25 < d  50 20 60 100 median of all tests 50 250 400 Minimum lifetime to fracture in hours 7 7.1 shall be met.1 Sampling and testing of finished products Frequency of sampling and testing The manufacturer shall sample and test in accordance with Table 4.2 7.1.2.1.1. Table 4 — Frequency of sampling and testing for factory production control Cross sectional area Maximum force Reduction in area Rib height 0.1 Evaluation of conformity Factory production control General 7. The mean value of the three individual results shall be calculated.2 Initial type testing The requirements in prEN 10138-1:2000. Otherwise.Page 10 prEN 10138-4:2000 7. the mean value of the individual results from the test unit shall be calculated.2.2 Evaluation of test results of a test unit A test unit shall be deemed to conform to the requirements of this Part of this European Standard if all the results are greater than or equal to the specified value for the mechanical properties (except maximum value of maximum force) and within the tolerances for the maximum force and the geometrical properties.3 shall be met. two additional samples shall be taken from the test unit concerned by each failed result.3 Continuous surveillance The requirements in prEN 10138-1:2000. 7. the test unit shall be deemed to conform to the requirements of this Part of this European Standard and no further check is needed. 7. The test unit shall be deemed to conform to the requirements of this Part of this European Standard if this mean value is greater than or equal to the specified value. 7. . c) when results for properties specified by a minimum and/or a maximum value are not in accordance with the requirements. two additional samples shall be taken. 7.1. Otherwise. The test unit shall be deemed to conform to the requirements of this Part of this European Standard if this mean value is greater than or equal to the specified value. the test unit shall be rejected and the manufacturer shall immediately take the measures to rectify the fault.2 shall be met. the following procedure shall be applied: a) when at least one result for the maximum force is lower than the specified value.2.2 shall be met.3 Assessment of long term quality level The requirements in prEN 10138-1: 2000. These samples shall be submitted to tensile tests. the concerned unit of product shall be rejected. All units of product with non conforming results shall be rejected and the producer shall immediately take the measures to rectify the fault. If at least one of the two additional results does not conform to the specifications.1.1. the test unit shall be rejected and the producer shall immediately take the measures to rectify the fault.2. 7. 7.1 % proof force is lower than the specified value. If the two additional results conform to the requirements. If this condition is not met. b) when a result for the 0. 9 Delivery by the manufacturer Delivery conditions shall be in accordance with clause 9 of prEN 10138-1:2000 and the following requirements: a) b) bars shall be supplied in straight lengths. the manufacturer shall give adequate protection against damage to threaded ends.Page 11 prEN 10138-4:2000 8 Test methods The test methods shall be in accordance with prEN ISO 15630-3. until delivered to the purchaser. .