TECHNICAL SPECIFICATION ISO/TS 15510 First edition 2003-04-15 Stainless steels Chemical composition Aciers inoxydables Composition chimique Reference number ISO 2003
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Foreword ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies (ISO member bodies). The work of preparing International Standards is normally carried out through ISO technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, governmental and non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization. International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2. The main task of technical committees is to prepare International Standards. Draft International Standards adopted by the technical committees are circulated to the member bodies for voting. Publication as an International Standard requires approval by at least 75 % of the member bodies casting a vote. In other circumstances, particularly when there is an urgent market requirement for such documents, a technical committee may decide to publish other types of normative document: an ISO Publicly Available Specification (ISO/PAS) represents an agreement between technical experts in an ISO working group and is accepted for publication if it is approved by more than 50 % of the members of the parent committee casting a vote; an ISO Technical Specification (ISO/TS) represents an agreement between the members of a technical committee and is accepted for publication if it is approved by 2/3 of the members of the committee casting a vote. An ISO/PAS or ISO/TS is reviewed after three years in order to decide whether it will be confirmed for a further three years, revised to become an International Standard, or withdrawn. If the ISO/PAS or ISO/TS is confirmed, it is reviewed again after a further three years, at which time it must either be transformed into an International Standard or be withdrawn. Attention is drawn to the possibility that some of the elements of this document may be the subject of patent rights. ISO shall not be held responsible for identifying any or all such patent rights. ISO/TS 15510 was prepared by Technical Committee ISO/TC 17, Steel, Subcommittee SC 4, Heat treatable and alloy steels. ISO 2003 All rights reserved iii
Introduction In its meeting held on 6th June 2000, ISO/TC 17/SC 4 decided to issue the revised version of ISO/TR 15510:1997 as a Technical Specification. It was nevertheless also stated that future discussions on ISO/TS 15510 should lead to a full ISO Standard. iv ISO 2003 All rights reserved
TECHNICAL SPECIFICATION Stainless steels Chemical composition 1 Scope This ISO Technical Specification lists the chemical compositions of stainless steels agreed by ISO/TC 17/SC 4 mainly on the basis of a composition of the specifications in existing ISO, ASTM, EN and JIS standards. They apply to all product forms including ingots and semi-finished material. 2 Normative references The following referenced 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. ISO 6929:1987, Steel products Definitions and classification 3 Terms and definitions For the purposes of this document, the terms and definitions given in ISO 6929 as well as the following apply. 3.1 stainless steel steel with at least 10,5 % mass fraction Cr and a maximum of 1,2 % mass fraction C NOTE For the classification of stainless steels according to their structure, composition and application see Annex A. 4 Chemical composition The chemical composition of stainless steels approved by ISO/TC 17/SC 4 is given in Table 1. NOTE If, in special cases, e.g. an ISO committee charged with establishing or revising a standard for a specific product or application of stainless steels, sees the necessity of deviating from the specifications in Table 1 it should inform ISO/TC 17/SC 4 (Secretariat's address: DIN, Postfach 10 51 45, 40042 Düsseldorf, Germany) of the reasons for this and try, before such deviations are considered, to achieve consensus for a corresponding modification to Table 1. 5 Designation of comparable steels In Table 2 are given the designations of stainless steels which are listed in other international, regional or national standards or designation systems and are comparable to the grades in Table 1. NOTE To compare similar grades, it is necessary to check each element before making a substitution. ISO 2003 All rights reserved 1
Table 1 Internationally agreed specifications for the composition of stainless steels (applicable for cast analysis); (mass %) Line Steel designation C Si Mn P S N Cr Mo Ni Others min. max. min. max. min. max. max. min. max. min. max. min. max. min. max. min. max. Element min. max. a) Austenitic steels 1 X2CrNi18-9 0,030 1,00 2,00 0,045 0,030 a 0,11 17,5 19,5 8,0 10,0 b 2 X2CrNi19-11 0,030 1,00 2,00 0,045 0,030a 0,11 18,0 20,0 10,0 12,0 b 3 X2CrNiN18-9 0,030 1,00 2,00 0,045 0,030a 0,12 0,22 17,5 19,5 8,0 10,0 4 X2CrNiN18-7 0,030 1,00 2,00 0,045 0,015 0,10 0,20 16,5 18,5 6,0 8,0 5 X5CrNi17-7 0,07 1,00 2,00 0,045 0,030a 0,11 16,0 18,0 6,0 8,0 6 X5CrNi18-9 0,07 1,00 2,00 0,045 0,030a 0,11 17,5 19,5 8,0 10,5 7 X7CrNi18-9 0,04 0,08 1,00 2,00 0,045 0,030a 0,11 18,0 20,0 8,0 10,5 8 X6CrNi18-12 0,08 1,00 2,00 0,045 0,030a 0,11 17,0 19,0 10,5 13,0 9 X3NiCr18-16 0,04 1,00 2,00 0,045 0,030a 15,0 17,0 17,0 19,0 10 X5CrNiN18-8 0,07 1,00 2,50 0,045 0,030 0,10 0,16 18,0 20,0 8,0 11,0 11 X10CrNi18-8 0,05 0,15 2,00 2,00 0,045 0,030a 0,11 16,0 19,0 0,80 6,0 9,5 12 X1CrNi25-21 0,02 0,25 2,00 0,025 0,010 0,11 24,0 26,0 0,20 20,0 22,0 13 X12CrMnNiN17-7-5 0,15 1,00 5,5 7,5 0,045 0,030a 0,05 0,25 16,0 18,0 3,5 5,5 14 X10CrNiS18-9 0,12 1,00 2,00 0,060 0,15 0,11 17,0 19,0 8,0 10,0 Cu c 15 X3CrNiCu18-9-4 0,04 1,00 2,00 0,045 0,030a 0,11 17,0 19,0 8,0 10,5 Cu 3,0 4,0 16 X6CrNiTi18-10 0,08 1,00 2,00 0,045 0,030a 17,0 19,0 9,0 12,0 b Ti 5 C 0,70 17 X7CrNiTi18-10 0,04 0,08 1,00 2,00 0,045 0,030a 17,0 19,0 9,0 12,0 b Ti 5 C 0,70 18 X6CrNiTiB18-10 0,04 0,08 1,00 2,00 0,035 0,015 17,0 19,0 9,0 12,0 Ti 5 C 0,70 B 0,001 5 0,005 0 19 X6CrNiNb18-10 0,08 1,00 2,00 0,045 0,030a 17,0 19,0 9,0 12,0 b Nb 10 C 1,00 20 X7CrNiNb18-10 0,04 0,08 1,00 2,00 0,045 0,030a 17,0 19,0 9,0 12,0 b Nb 10 C 1,00 21 X2CrNiMo17-12-2 0,030 1,00 2,00 0,045 0,030a 0,11 16,5 18,5 2,00 3,00 10,0 13,0b 22 X2CrNiMo17-12-3 0,030 1,00 2,00 0,045 0,030a 0,11 16,5 18,5 2,50 3,00 10,5 13,0b 23 X2CrNiMo18-14-3 0,030 1,00 2,00 0,045 0,015 0,11 17,0 19,0 2,50 3,00 12,5 15,0 24 X2CrNiMo19-14-4 0,030 1,00 2,00 0,045 0,030a 0,11 17,5 20,0 3,0 4,0 12,0 16,0 25 X2CrNiMoN17-11-2 0,030 1,00 2,00 0,045 0,030a 0,12 0,22 16,5 18,5 2,00 3,00 10,0 12,5b 2 ISO 2003 All rights reserved
Table 1 (continued) Line Steel designation C Si Mn P S N Cr Mo Ni Others min. max. min. max. min. max. max. min. max. min. max. min. max. min. max. min. max. Element min. max. a) Austenitic steels 26 X2CrNiMoN17-12-3 0,030 1,00 2,00 0,045 0,030a 0,12 0,22 16,5 18,5 2,50 3,00 10,5 13,0b 27 X2CrNiMoN18-12-4 0,030 1,00 2,00 0,045 0,030a 0,10 0,20 16,5 19,5 3,00 4,00 10,5 14,0b 28 X2CrNiMoN18-15-5 0,030 1,00 2,00 0,045 0,030a 0,12 0,22 17,0 20,0 4,0 5,0 13,0 17,0 29 X1CrNiMoN25-22-2 0,020 0,70 2,00 0,025 0,010 0,10 0,16 24,0 26,0 2,00 2,50 21,0 23,0 30 X5CrNiMo17-12-2 0,07 1,00 2,00 0,045 0,030a 0,11 16,5 18,5 2,00 3,00 10,0 13,0 31 X3CrNiMo17-12-3 0,05 1,00 2,00 0,045 0,030a 0,11 16,5 18,5 2,50 3,00 10,5 13,0b 32 X6CrNiMoTi17-12-2 0,08 1,00 2,00 0,045 0,030a 16,5 18,5 2,00 2,50 10,5 13,5b Ti 5 C 0,70 33 X6CrNiMoNb17-12-2 0,08 1,00 2,00 0,045 0,030a 16,5 18,5 2,00 2,50 10,5 13,5 Nb 10 C 1,00 34 X1CrNiMoCuN20-0,020 0,70 1,00 0,035 0,015 0,18 0,25 19,5 20,5 6,0 7,0 17,5 18,5 Cu 0,50 1,00 18-7 d 35 X1NiCrMoCu25-20-5 0,020 0,75 2,00 0,035 0,015 0,15 19,0 22,0 4,0 5,0 23,5 26,0 Cu 1,20 2,00 36 X1NiCrMoCu31-27-4 0,020 0,70 2,00 0,030 0,010 0,11 26,0 28,0 3,0 4,0 30,0 32,0 Cu 0,70 1,50 37 X1NiCrMoCuN25-20-7 0,020 0,75 2,00 0,035 0,015 0,15 0,25 19,0 21,0 6,0 7,0 24,0 26,0 Cu 0,50 1,50 38 X1CrNiMoCuN24-22-8 0,020 0,50 2,0 4,0 0,030 0,005 0,45 0,55 23,0 25,0 7,0 8,0 21,0 23,0 Cu 0,30 0,60 39 X8CrMnNiN18-9-5 0,05 0,10 0,30 0,60 9,0 10,0 0,035 0,030 0,25 0,32 17,5 18,5 0,50 5,0 6,0 Cu 0,40 40 X8CrMnCuN17-8-3 0,10 2,00 6,5 8,5 0,040 0,030 0,15 0,30 16,0 18,0 1,00 2,00 Cu 2,00 3,50 41 X1CrNiMoCuNW24-22-6 0,020 0,70 2,0 4,0 0,030 0,010 0,35 0,50 23,0 25,0 5,5 6,5 21,0 23,0 Cu 1,00 2,00 W 1,50 2,50 42 X2CrNiMnMoN25-18-6-5 0,030 1,00 5,0 7,0 0,030 0,015 0,30 0,60 24,0 26,0 4,0 5,0 16,0 19,0 Nb 0,15 43 X11CrNiMnN19-8-6 0,07 0,15 0,50 1,00 5,0 7,5 0,030 0,015 0,20 0,30 17,5 19,5 6,5 8,5 44 X6CrNiCuS18-9-2 0,08 1,00 2,00 0,045 0,15 0,11 17,0 19,0 0,60 8,0 10,0 Cu 1,4 1,8 45 X6CrNiCu17-8-2 0,08 1,70 3,00 0,045 0,030 15,0 18,0 6,0 9,0 Cu 1,0 3,0 46 X12CrNiSi18-9-3 0,15 2,00 3,00 2,00 0,045 0,030 17,0 19,0 8,0 10,0 ISO 2003 All rights reserved 3
Table 1 (continued) Line Steel designation C Si Mn P S N Cr Mo Ni Others min. max. min. max. min. max. max. min. max. min. max. min. max. min. max. min. max. Element min. max. b) Austenitic-ferritic (duplex) steels 51 X2CrNiN23-4 d 0,030 1,00 2,00 0,035 0,015 0,05 0,20 22,0 24,0 0,10 0,60 3,5 5,5 Cu 0,10 0,60 52 X2CrNiMoN22-5-3e 0,030 1,00 2,00 0,035 0,015 0,10 0,22 21,0 23,0 2,5 3,5 4,5 6,5 53 X2CrNiMoCuN25-6-3 0,030 0,70 2,00 0,035 0,015 0,15 0,30 24,0 26,0 2,5 4,0 5,0 7,5 Cu 1,00 2,50 54 X2CrNiMoN25-7-4d 0,030 1,00 2,00 0,035 0,015 0,24 0,35 24,0 26,0 3,0 4,5 6,0 8,0 55 X3CrNiMoN27-5-2 0,050 1,00 2,00 0,035 0,015 0,05 0,20 25,0 28,0 1,30 2,00 4,5 6,5 56 X2CrNiMoCuWN25-7-4 0,030 1,00 1,00 0,035 0,015 0,20 0,30 24,0 26,0 3,0 4,0 6,0 8,0 Cu W 0,50 0,50 1,00 1,00 c) Ferritic steels 61 X2CrNi12 0,030 1,00 1,50 0,040 0,015 0,030 10,5 12,5 0,30 1,10 62 X2CrTi12 0,030 1,00 1,00 0,040 0,030a 10,5 12,5 0,50 Ti 6 (C+N) 0,65 63 X6CrTi12 0,08 1,00 1,00 0,040 0,030f 10,5 12,5 0,50 Ti 6 (C+N) 0,65 64 X6CrNiTi12 0,08 1,00 1,00 0,040 0,015 10,5 12,5 0,50 1,50 Ti 0,05 0,35 65 X6Cr13 0,08 1,00 1,00 0,040 0,030a 11,5 14,0 0,75 66 X6CrAl13 0,08 1,00 1,00 0,040 0,030a 11,5 14,0 Al 0,10 0,30 67 X6Cr17 0,08 g 1,00 1,00 0,040 0,030a 16,0 18,0 68 X7CrS17 0,09 1,50 1,50 0,040 0,15 16,0 18,0 0,60 69 X6CrMo17-1 0,08 1,00 1,00 0,040 0,030a 16,0 18,0 0,90 1,40 70 X3CrTi17 0,05 1,00 1,00 0,040 0,030a 16,0 19,0 Ti 4 (C + N) + 0,20 0,75 71 X6CrMoNb17-1 0,08 1,00 1,00 0,040 0,015 0,040 16,0 18,0 0,80 1,40 Nb 5 C 1,00 72 X2CrMoTi18-2 0,025 1,00 1,00 0,040 0,015 0,025 17,0 20,0 1,80 2,50 Ti+Nb 4 (C + N) + 0,20 0,80 73 X3CrNb17 0,05 1,00 1,00 0,040 0,015 16,0 18,0 Nb 12 C 1,00 74 X2CrMoTiS18-2 0,03 1,00 0,50 0,040 0,15 17,5 19,0 2,00 2,50 Ti 0,30 0,80 (C + N) 0,040 4 ISO 2003 All rights reserved