EN 10084:2008

2003-01.Slovenski inštitut za standardizacijo. Razmnoževanje celote ali delov tega standarda ni dovoljeno.Einsatzstähle - Technische LieferbedingungenAciers pour cémentation - Conditions techniques de livraisonCase hardening steels - Technical delivery conditions77.140.10Jekla za toplotno obdelavoHeat-treatable steelsICS:Ta slovenski standard je istoveten z:EN 10084:2008SIST EN 10084:2008en,fr,de01-junij-2008SIST EN 10084:2008SLOVENSKI
STANDARDSIST EN 10084:20001DGRPHãþD

EUROPEAN STANDARDNORME EUROPÉENNEEUROPÄISCHE NORMEN 10084April 2008ICS 77.140.10Supersedes EN 10084:1998
English VersionCase hardening steels - Technical delivery conditionsAciers pour cémentation - Conditions techniques delivraisonEinsatzstähle - Technische LieferbedingungenThis European Standard was approved by CEN on 29 February 2008.CEN members are bound to comply with the CEN/CENELEC Internal Regulations which stipulate the conditions for giving this EuropeanStandard the status of a national standard without any alteration. Up-to-date lists and bibliographical references concerning such nationalstandards may be obtained on application to the CEN Management Centre or to any CEN member.This European Standard exists in three official versions (English, French, German). A version in any other language made by translationunder the responsibility of a CEN member into its own language and notified to the CEN Management Centre has the same status as theofficial versions.CEN members are the national standards bodies of Austria, Belgium, Bulgaria, Cyprus, Czech Republic, Denmark, Estonia, Finland,France, Germany, Greece, Hungary, Iceland, Ireland, Italy, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Norway, Poland, Portugal,Romania, Slovakia, Slovenia, Spain, Sweden, Switzerland and United Kingdom.EUROPEAN COMMITTEE FOR STANDARDIZATIONCOMITÉ EUROPÉEN DE NORMALISATIONEUROPÄISCHES KOMITEE FÜR NORMUNGManagement Centre: rue de Stassart, 36
B-1050 Brussels© 2008 CENAll rights of exploitation in any form and by any means reservedworldwide for CEN national Members.Ref. No. EN 10084:2008: ESIST EN 10084:2008

Options.31 Annex B (informative)
Dimensional standards applicable to products complying with this European Standard.33 Annex C (normative)
Determining the microscopic non-metallic inclusions content.34 Annex D (informative)
Comparison of steel grades specified in this European Standard and
ISO 683-11:1987 and other steel grades previously standardized nationally.35 Annex E (informative) Classification of steel grades according to minimum tensile strength as a function of diameter after hardening and tempering at 200 °C.36 Bibliography.37
EN 10160, Ultrasonic testing of steel flat product of thickness equal to or greater than 6 mm (reflection method) EN 10163-2, Delivery requirements for surface condition of hot-rolled steel plates, wide flats and sections - Part 2: Plates and wide flats EN 10204, Metallic products - Types of inspection documents EN 10221, Surface quality classes for hot-rolled bars and rods - Technical delivery conditions EN 10247:2007, Micrographic examination of the non-metallic inclusion content of steels using standard
pictures prCEN/TR 10261, Iron and steel - Review of available methods of chemical analysis EN 10308, Non destructive testing – Ultrasonic testing of steel bars EN ISO 377, Steel and steel products - Location and preparation of samples and test pieces for mechanical testing (ISO 377:1997) EN ISO 642, Steel - Hardenability test by end quenching (Jominy test) (ISO 642:1999) EN ISO 643, Steels – Micrographic determination of the apparent grain size (ISO 643:2003) EN ISO 6506-1, Metallic materials - Brinell hardness test - Part 1: Test method (ISO 6506-1:2005) 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) (ISO 6508-1:2005) EN ISO 14284, Steel and iron - Sampling and preparation of samples for the determination of chemical com-position (ISO 14284:1996) 3 Terms and definitions For the purposes of this European Standard the terms and definitions given in EN 10020, EN 10021, EN 10052, EN 10079, EN ISO 377 and EN ISO 14284 and the following apply. 3.1 case-hardening steels steels with a relatively low carbon content which are intended for carburising or carbonitriding and subsequent hardening NOTE Such steels, after treatment, are characterised by a high hardness surface layer and a tough core. 4 Classification and designation 4.1 Classification All steels covered by this European Standard are classified according to EN 10020. Steel grades C10E, C10R, C15E, C15R, C16E and C16R are non alloy special steels. All other steels covered by this European Stan-dard are alloy special steels. SIST EN 10084:2008

20 round bars with nominal diameter 40 mm and the nominal length of 8 000 mm according to EN 10060 made of steel grade 20MnCr5 (1.7147) according to EN 10084 in the heat treatment condition +A with surface condition +BC, test report 2.2 as specified in EN 10204 20 round bars EN 10060 - 40x8000 EN 10084 - 20MnCr5+A+BC EN 10204 -2.2 or 20 round bars EN 10060 - 40x8000 EN 10084 - 1.7147+A+BC EN 10204 - 2.2 6 Manufacturing process 6.1 Melting process The type of melting process shall be left to the discretion of the manufacturer. 6.2 Deoxidation All steels shall be killed. 6.3 Manufacture of the product The manufacturing process route of the product shall be at the manufacturer’s discretion. For minimum reduction ratio or minimum thickness deformation ratio of rolled and forged products see A.5. 6.4 Heat-treatment condition and surface finish at the time of delivery 6.4.1 Normal condition at delivery Unless otherwise agreed at the time of enquiry and order, the products shall be delivered in the untreated, i.e. hot formed, condition. 6.4.2 Particular heat-treatment condition If so agreed at the time of enquiry and order, the products shall be delivered in one of the heat-treatment con-ditions given in Table 1, line 3 to line 8. SIST EN 10084:2008

For non alloy steels, the hardness requirements given in Table 1, column 8, sub-clause 2, shall be verified (see also Table 7 and Table 9).
8.2.2 Verification of hardenability For alloy steels as far as available the manufacturer has the option to verify the hardenability by calculation. The calculation method is left to the discretion of the manufacturer. If agreed at the time of enquiry and order the manufacturer shall give sufficient information about the calculation for the customer to confirm the result. If for certain steel grades a calculation formula is not available or in the case of dispute an end quench harde-nability test shall be carried out in accordance with EN ISO 642 and Table 9. The temperature for quenching shall comply with Table 8 of this document. The hardness values shall be determined in accordance with EN ISO 6508-1, method C. 8.2.3 Verification of austenitic grain size If the verification of fine grain structure is agreed at the time of enquiry and order, the verification of the aus-tenitic fine grain size shall be made according to A.4. 8.2.4 Visual and dimensional inspection A sufficient number of products shall be inspected to ensure compliance with the specification. 8.2.5 Retests See EN 10021. 9 Marking The manufacturer shall mark the products or the bundles or boxes in a suitable way so that it is possible to determine the cast, the steel grade and the origin of the delivery (see A.6).SIST EN 10084:2008

1 2 3 4 5 6 7 8 9 10 x = Applicable for Applicable requirements for Non alloy steel grades Alloy steel grades 1 Heat-treatment condition at
delivery Symbol Semi- finished products Bars Rod Flat products Hammer and
drop for-gings 1. 2. 1. 2. 3. Remarks 2 Untreated None or + U x x x x x - 3 Treated to im-prove sheara-bility + S x x - - - Column+ S 4 Soft annealed
+ A x x x x x Column+ A 5 Treated to hardness range + TH - x x x x Column+ TH 6 Treated to fer-rite-pearlite structure and hardness range + FP - x - - x Column+ FP 7 Normalizeda
+N - - - x - Chemical com-position accord-ing to Tables 3 and 4 Brinell
hardness according to
Table 7
Column+ N As in column 8 (see footnote b to Table 3) Hardenability
values according to Table 5 or Table 6 Observe also options given in Annex A. 8 Others Other treatment conditions, for example certain annealing conditions to achieve a certain structure, may be agreed at the time of enquiry and order. The condition "annealed for spheroidal carbides (+AC) ", as required for cold heading and cold extrusion, is covered by EN 10263-4. a Normalizing may be replaced by normalizing forming. SIST EN 10084:2008

1 2 3 4 5 6 7 8 9 X = in general applicable for 1 Surface condition at delivery Symbol Semi-finished products such as blooms, billets bars rods flat products hammer and drop forgings (see 1.1,
Note 2) Notes 2 Unless otherwise agreed Hot worked None or + HW x x x x x - 3 Unformed con-tinuously cast +CC x - - - - - 4 Hot worked and pickled + PI - - x x - a 5 Hot worked and blast cleaned + BC x x x x x a 6 Hot worked and
rough ma-chined + RM - x x - x a 7 Particular conditions supplied by agreement Others - - x x x x - a In addition certain surface treatments like oiled or limed or phosphated may be agreed.
Name Number C Si max. Mn P max. S Cr Mo Ni B C10E 1.1121 0,07 to 0,13 0,40 0,30 to 0,600,035 ≤ 0,035 - - - - C10R 1.1207 0,07 to 0,13 0,40 0,30 to 0,600,035 0,020 to 0,040 - - - - C15E 1.1141 0,12 to 0,18 0,40 0,30 to 0,600,035 ≤ 0,035 - - - - C15R 1.1140 0,12 to 0,18 0,40 0,30 to 0,600,035 0,020 to 0,040 - - - - C16E 1.1148 0,12 to 0,18 0,40 0,60 to 0,900,035 ≤ 0,035 - - - - C16R 1.1208 0,12 to 0,18 0,40 0,60 to 0,900,035 0,020 to 0,040 - - - - 17Cr3 1.7016 ≤ 0,035 17CrS3 1.7014 0,14 to 0,20 0,40 0,60 to 0,900,025 0,020 to 0,040 0,70 to 1,00 - - - 28Cr4 1.7030 ≤ 0,035 28CrS4 1.7036 0,24 to 0,31 0,40 0,60 to 0,900,025 0,020 to 0,040 0,90 to 1,20 - - - 16MnCr5 1.7131 ≤ 0,035 16MnCrS5 1.7139 0,14 to 0,19 0,40 1,00 to 1,300,025 0,020 to 0,040 0,80 to 1,10 - - - 16MnCrB5 1.7160 0,14 to 0,19 0,40 1,00 to 1,300,025 ≤ 0,035 0,80 to 1,10 - - 0,0008 to 0,0050d
20MnCr5 1.7147 ≤ 0,035 20MnCrS5 1.7149 0,17 to 0,22 0,40 1,10 to 1,400,025 0,020 to 0,040 1,00 to 1,30 - - - 18CrMo4 1.7243 ≤ 0,035 18CrMoS4 1.7244 0,15 to 0,21 0,40 0,60 to 0,900,025 0,020 to 0,040 0,90 to 1,20 0,15 to 0,25 - - 22CrMoS3-5 1.7333 0,19 to 0,24 0,40 0,70 to 1,000,025 0,020 to 0,040 0,70 to 1,00 0,40 to 0,50 - - 20MoCr3 1.7320 ≤ 0,035 20MoCrS3 1.7319 0,17 to 0,23 0,40 0,60 to 0,900,025 0,020 to 0,040 0,40 to 0,70 0,30 to 0,40 - - 20MoCr4 1.7321 ≤ 0,035 20MoCrS4 1.7323 0,17 to 0,23 0,40 0,70 to 1,000,025 0,020 to 0,040 0,30 to 0,60 0,40 to 0,50 - - 16NiCr4 1.5714 ≤ 0,035 16NiCrS4 1.5715 0,13 to 0,19 0,40 0,70 to 1,000,025 0,020 to 0,040 0,60 to 1,00 - 0,80 to 1,10 - 10NiCr5-4 1.5805 0,07 to 0,12 0,40 0,60 to 0,900,025 ≤ 0,035 0,90 to 1,20 - 1,20 to 1,50 - 18NiCr5-4 1.5810 0,16 to 0,21 0,40 0,60 to 0,900,025 ≤ 0,035 0,90 to 1,20 - 1,20 to 1,50 - 17CrNi6-6 1.5918 0,14 to 0,20 0,40 0,50 to 0,900,025 ≤ 0,035 1,40 to 1,70 - 1,40 to 1,70 - 15NiCr13 1.5752 0,14 to 0,20 0,40 0,40 to 0,700,025 ≤ 0,035 0,60 to 0,90 - 3,00 to 3,50 - 20NiCrMo2-2 1.6523 ≤ 0,035 20NiCrMoS2-2 1.6526 0,17 to 0,23 0,40 0,65 to 0,950,025 0,020 to 0,040 0,35 to 0,70 0,15 to 0,25 0,40 to 0,70 - 17NiCrMo6-4 1.6566 ≤ 0,035 17NiCrMoS6-4 1.6569 0,14 to 0,20 0,40 0,60 to 0,900,025 0,020 to 0,040 0,80 to 1,10 0,15 to 0,25 1,20 to 1,50 - 20NiCrMoS6-4 1.6571 0,16 to 0,23 0,40 0,50 to 0,900,025 0,020 to 0,040 0,60 to 0,90 0,25 to 0,35 1,40 to 1,70 - 18CrNiMo7-6 1.6587 0,15 to 0,21 0,40 0,50 to 0,900,025 ≤ 0,035 1,50 to 1,80 0,25 to 0,35 1,40 to 1,70 - 14NiCrMo13-4 1.6657 0,11 to 0,17 0,40 0,30 to 0,600,025 ≤ 0,035 0,80 to 1,10 0,20 to 0,30 3,00 to 3,50 - 20NiCrMo13-4 1.6660 0,17 to 0,22 0,40 0,30 to 0,600,025 ≤ 0,035 0,80 to 1,20 0,30 to 0,50 3,00 to 3,50 - a Elements not quoted in this table shall not be intentionally added to the steel without the agreement of the purchaser, other than for the purpose of finishing the heat. All reasonable precautions shall be taken to prevent the addition of such elements from scrap or other material used in manufacture which affect the hardenability, mechanical properties and applicability. b Where requirements are made on hardenability (see Table 5 and Table 6), slight deviations from the limits for the cast analysis are permitted, except for phosphorus and sulphur; these deviations shall, however, not exceed in the case of carbon ± 0,01 % and in all other cases the values acc. to table 4. c Steels with improved machinability as a result of the addition of higher sulphur contents up to around 0,10 % S (including resulphurized steels with con-trolled inclusion content (e.g. Ca-treatment)) (modern method) or lead may be supplied on request. In the first case the upper limit for the manganese con-tent may be increased by 0,15 %. d Boron is in this
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