1、July 2012 Translation by DIN-Sprachendienst.English price group 13No part of this translation may be reproduced without prior permission ofDIN Deutsches Institut fr Normung e. V., Berlin. Beuth Verlag GmbH, 10772 Berlin, Germany,has the exclusive right of sale for German Standards (DIN-Normen).ICS 7
2、7.140.65!%)“2069729www.din.deDDIN 17115Steels for welded round link chains and chain components Technical delivery conditions,English translation of DIN 17115:2012-07Sthle fr geschweite Rundstahlketten und Ketten-Einzelteile Technische Lieferbedingungen,Englische bersetzung von DIN 17115:2012-07Acie
3、rs pour chanes maillons en acier rond fabriques par soudage et composants pourchanes Conditions techniques de livraison,Traduction anglaise de DIN 17115:2012-07SupersedesDIN 17115:1987-02www.beuth.deDocument comprises 25 pagesIn case of doubt, the German-language original shall be considered authori
4、tative.03.14 DIN 17115:2012-07 2 A comma is used as the decimal marker. Contents Page Foreword . 3 1 Scope . 4 2 Normative references . 4 3 Terms and definitions 5 4 Classification and designation 5 4.1 Classification . 5 4.2 Designation . 5 5 Ordering details 5 5.1 Required details 5 5.2 Optional d
5、etails . 6 5.3 Examples of orders. 6 6 Requirements 7 6.1 Steelmaking process 7 6.2 Condition on delivery (heat treatment condition and surface finish) . 7 6.3 Chemical composition . 7 6.4 Hardenability . 7 6.5 Mechanical properties 7 6.6 Technological properties . 8 6.7 Grain size . 8 6.8 Non-metal
6、lic inclusions . 8 6.9 Internal defects . 8 6.10 Surface condition 8 6.11 Dimensions and tolerances, and mass 9 7 Testing . 9 7.1 Type of testing 9 7.2 Types of inspection document 9 7.3 Scope of tests . 9 8 Sampling 9 8.1 Test unit . 9 8.2 Sampling and preparation of specimens and test pieces 9 9 T
7、est methods . 11 9.1 Chemical analysis . 11 9.2 Tensile testing . 11 9.3 Charpy pendulum impact testing 11 9.4 Bend testing 11 9.5 Hardness testing . 11 9.6 Verification of hardenability 12 9.7 Grain size . 12 9.8 Non-metallic inclusions . 12 9.9 Depth of decarburization . 12 9.10 Checking dimension
8、s and visual checks . 12 9.11 Retests, sorting and reprocessing 12 10 Marking 12 10.1 Mandatory marking . 12 10.2 Additional marking . 12 DIN 17115:2012-07 3 Foreword This standard has been prepared by Subcommittee NA 021-00-05-01 UA Legierte und unlegierte Maschinenbausthle of the Normenausschuss E
9、isen und Stahl (FES) (Iron and Steel Standards Committee) in DIN and by Subcommittee NA 085-00-01-01 UA Werkstoffe of the Normenausschusses Rundstahlketten (NRK) (Round Steel Link Chains Standards Committee) in DIN. Attention is drawn to the possibility that some elements of this document may be the
10、 subject of patent rights. DIN shall not be held responsible for identifying any or all such patent rights. Amendments This standard differs from DIN EN 17115:1987-02 as follows: a) steel grades USt 35-2 and RSt 35-2 have been deleted, the three unalloyed quality steels 18Mn4, 21MnSi5, 24MnSi6 and o
11、ne special steel 15CrNi6 have been added; b) steel names have been changed; c) chemical compositions have been changed (particularly, the maximum mass fractions of P and S have been lowered); d) mechanical properties have been changed; e) hardenability limit values have been changed; f) symbols for
12、treatment conditions and special requirements have been changed; g) the standard has been fully revised both in structure and editorially, particularly as regards the reference documents; h) the title has been changed. Previous editions DIN 1613-2: 1943x-04 DIN 17115: 1965-12, 1972-08, 1987-02 DIN 1
13、7115:2012-07 4 1 Scope This standard applies to the alloyed and unalloyed steels listed in Table 2 which are intended for use in tested welded round link chains and chain components. Such steels are normally supplied in the form of rod, bars or billets. 2 Normative references The following reference
14、d documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the referenced document (including any amendments) applies. DIN 685-1:1981-11, Tested round steel link chains Part 1: Terms and defi
15、nitions DIN 1599, Identification markings for steel DIN 17021-1, Heat treatment of ferrous metals Material selection Part 1: Selection according to hardenability DIN 50125, Testing of metallic materials Tensile test pieces DIN EN 10017, Steel rod for drawing and/or cold rolling Dimensions and tolera
16、nces DIN EN 10020:2000-07, Definition and classification of grades of steel DIN EN 10021:2007-03, General technical delivery conditions for steel products DIN EN 10025-3, Hot rolled products of structural steels Part 3: Technical delivery conditions for normalized/normalized rolled weldable fine gra
17、in structural steels DIN EN 10027-1, Designation systems for steels Part 1: Steel names DIN EN 10027-2, Designation systems for steels Part 2: Numerical system DIN EN 10052:1994-01, Vocabulary of heat treatment terms for ferrous products DIN EN 10060, Hot rolled round steel bars Dimensions and toler
18、ances on shape and dimensions DIN EN 10079:2007-06, Definition of steel products DIN EN 10204, Metallic products Types of inspection documents DIN EN 10218-2, Steel wire and wire products General Part 2: Wire dimensions and tolerances DIN EN 10221, Surface quality classes for hot rolled round bars a
19、nd rods Technical delivery conditions CEN/TR 10261, Iron and steel European standards for the determination of chemical composition DIN EN ISO 148-1, Metallic materials Charpy pendulum impact test Part 1: Test method DIN EN ISO 377, Steel and steel products Location and preparation of samples and te
20、st pieces for mechanical testing DIN EN ISO 642, Steel Hardenability test by end quenching (Jominy test) DIN EN ISO 643, Steel Micrographic determination of the apparent grain size DIN EN ISO 3887, Steel Determination of depth of decarburization DIN EN ISO 6506-1, Metallic materials Brinell hardness
21、 test Part 1: Test method DIN EN ISO 6507-1, Metallic materials Vickers hardness test Part 1: Test method DIN 17115:2012-07 5 DIN EN ISO 6508-1, Metallic materials Rockwell hardness test Part 1: Test method (scales A, B, C, D, E, F, G, H, K, N, T) DIN EN ISO 6892-1, Metallic materials Tensile testin
22、g Part 1: Method of test at room temperature DIN EN ISO 7438, Metallic materials Bend test DIN EN ISO 14284, Steel and iron Sampling and preparation of samples for the determination of chemical composition DIN EN ISO 18265:2004-02, Metallic materials Conversion of hardness values ISO 4967, Steel Det
23、ermination of content of non-metallic inclusions Micrographic method using standard diagrams SEP 1664 Beiblatt, Derivation of equations by multiple regression for the calculation of hardenability in the Jominy end quench test on the basis of the chemical composition of steels 3 Terms and definitions
24、 For the purposes of this document, the terms and definitions given in DIN 685-1:1981-11, DIN EN 10020:2000-07, DIN EN 10021:2007-03, DIN EN 10052:1994-01 and DIN EN 10079:2007-06 apply. 4 Classification and designation 4.1 Classification The steel grades specified in this standard are unalloyed qua
25、lity steels (grades 15Mn4, 18Mn4, 21Mn4, 21Mn5, 21MnSi5, 24MnSi5 and 27MnSi6, and steel grade S355N (see footnote a in Table 2) in accordance with DIN EN 10020:2000-07, 4.1.1, and alloyed special steels (grades 15CrNi6, 20MnNiCrMo3-2, 20MnNiCrMo3-3, 23MnNiCrMo5-2, 23MnNiCrMo5-3 and 23MnNiMoCr5-4) in
26、 accordance with DIN EN 10020:2000-07, 4.3.2. 4.2 Designation Steel grade names as in this standard are in accordance with those laid down in DIN EN 10027-1, while the material numbers are in accordance with DIN EN 10027-2. 5 Ordering details 5.1 Required details The purchaser shall include the foll
27、owing details in queries and orders: a) amount ordered (number or mass); b) product form; c) relevant dimensional standard and nominal sizes with tolerances; d) number of this standard (DIN 17115); e) steel name or material number; f) designation for “type 3.1” inspection certificate, or where requi
28、red, “type 3.2” inspection certificate as in DIN EN 10204 (see 7.2). DIN 17115:2012-07 6 5.2 Optional details Below are several optional details laid down in the present standard. If the purchaser does not make use of these optional details, the products are to be delivered in accordance with the ma
29、ndatory details as laid down in this standard (see 5.1). 1) Any particular heat treatment methods and/or surface finishes (see 6.2.1, 6.2.2 and Table 1); 2) Proof of suitability for hot dip galvanizing (see Table 2, footnote c); 3) Heat treatment for improving cold formability (see Table 4, footnote
30、 f); 4) Deviating hardness values in delivery condition “treated for shearability” (see Table 4, footnote e); 5) Individual characteristic hardenability values (see Table 7, footnote b); 6) Additional tests (see 7.3 and Table 11); 7) Verification of mechanical properties in simulated heat treated co
31、nditions (see 6.5.3 and Tables 5 and 6); 8) Verification of notch impact energy values at 40 C (see 6.5.4); 9) Charpy pendulum impact test for products with a diameter smaller than 16 mm (see 6.5.4, 8.2.3.2, 9.3.1 and Table 6); 10) Verification of non-metallic inclusions (see 6.8); 11) Special surfa
32、ce conditions (see 6.10.1); 12) Permissible depth of decarburization (see 6.10.2 and Table 10); 13) Special provisions regarding checking of dimensions (see 6.11.1 and 9.10.1); 14) Special provisions regarding visual checks (see 9.10.2); 15) Additional marking (see 10.2). 5.3 Examples of orders EXAM
33、PLE 1 2 t of wire with nominal diameter 13 mm, tolerance class 1, as in DIN EN 10218-2 of steel grade 21Mn5 (1.0495) as in DIN 17115, untreated (+AR), with inspection certificate 3.1 as in DIN EN 10204:2005-01 2 t Wire EN 10218-2 13 T1 DIN 17115 21Mn5 or 2 t Wire EN 10218-2 13 T1 DIN 17115 1.0495 EX
34、AMPLE 2 50 round bars with nominal diameter 20 mm, manufactured length (M) 8 000 mm as in DIN EN 10060 of steel grade 20MnNiCrMo3-2 (1.6522) as in DIN 17115, soft annealed (+A), with inspection certificate 3.2 as in DIN EN 10204:2005-01 50 round bars EN 10060 20 x 8000 M DIN 17115 20MnNiCrMo3-2+A In
35、spection certificate 3.2 or 50 round bars EN 10060 20 x 8000 M DIN 17115 1.6522+A Inspection certificate 3.2 DIN 17115:2012-07 7 6 Requirements 6.1 Steelmaking process The steel shall be made according to the electric arc furnace process or the oxygen converter process. The steel shaping process is
36、at the manufacturers discretion. 6.2 Condition on delivery (heat treatment condition and surface finish) 6.2.1 Products shall be supplied in the “as rolled” (+AR) condition, if no other delivery condition as in Table 1 has been agreed at the time of enquiry and ordering. 6.2.2 Other heat treatment c
37、onditions and/or surface finishes with the relevant requirements may be agreed at the time of enquiry and ordering. 6.3 Chemical composition 6.3.1 Table 2 specifies the chemical composition for the various steel grades. NOTE The Al content specified in Table 2 ensures sufficient resistance to ageing
38、 for all steel grades. 6.3.2 Table 3 specifies the tolerances for product analysis values deviating from the limit values of the cast analysis specified in Table 2. 6.4 Hardenability The hardenability requirements and limit values specified in Table 7 apply to products made of special steel. The har
39、dness values in this table can also be obtained from Figures 1 a) to 1 f). 6.5 Mechanical properties 6.5.1 Tables 4, 5 and 6 specify mechanical properties at room temperature. 6.5.2 The values specified in Tables 4 to 7 apply for the corresponding heat treatment temperatures as in Table 8. 6.5.3 For
40、 any condition on delivery, the verification of the mechanical properties for a simulated heat treatment condition (normalized or quenched and tempered) may be agreed at the time of enquiry and ordering. In this case the mechanical properties specified in Tables 5 and 6 shall be verified for the rel
41、evant test pieces. 6.5.4 For special steels, the manufacturer and purchaser may agree at the time of ordering on the verification of low temperature impact resistance by subjecting reference test pieces from the same cast to the Charpy pendulum impact test at 40 C. The mean notch impact energy value
42、 shall be at least 40 J. The heat treatment of specimens, the yield stress, tensile strength, elongation after fracture and reduction in cross-section on fracture are subject to agreement. DIN 17115:2012-07 8 6.6 Technological properties 6.6.1 Formability In the bend test, products with a diameter u
43、p to 26 mm shall withstand bending through 180 without incipient cracks forming on the tension and compression sides when the products are bent in the cold condition around a mandrel having a diameter as specified in Table 4 as a function of the treatment condition (untreated, annealed or spheroidiz
44、ed), depending on the steel grade. Confirmation of this may be agreed at the time of enquiry and ordering. For larger diameters, products in accordance with this standard shall only be bent in the hot condition. 6.6.2 Weldability All steel grades as in this standard are suitable for flash butt weldi
45、ng, for products having smaller diameters also for resistance butt welding. 6.6.3 Shearability For products of steel grades 21MnSi5, 24MnSi6, 27MnSi6, 15CrNi6, 20MnNiCrMo3-2, 20MnNiCrMo3-3, 23MnNiCrMo5-2, 23MnNiCrMo5-3 and 23MnNiMoCr5-4 if the delivery condition “treated for shearability condition”
46、(+S) has been ordered, the hardness value shall not exceed the values specified for this condition in Table 4. NOTE Under suitable conditions, the relevant steel grades are also shearable in the annealed condition (+A) or spheroidized (+AC), see Table 4, while unalloyed steels are shearable in the n
47、ormalized condition (+N), see Table 5; steel grades 15Mn4, 18Mn4, 21Mn4 and 21Mn5 are also shearable in the untreated condition. 6.7 Grain size Steels as in Table 2 shall be fine-grained, i.e. they shall have an austenitic grain size (as-quenched grain size) no greater than grain size index 6 when t
48、ested as in DIN EN ISO 643. 6.8 Non-metallic inclusions Requirements regarding non-metallic inclusions apply to special steels and are to be met in the case of special steels; however confirmation of this shall be agreed separately (see 5.2, option 10). 6.9 Internal defects Products shall not have any internal defects likely to adversely affect their performance to any significant extent. 6.10 Surface condition 6.10.1 Products shall have a smooth surfac
