DIN-17210-1986-Case-hardening-steels

UDC669.14.018.298.2:620.1September 1986Case hardening steelsDINTechnical delivery conditions17210Einsatzstahle:technische LieferbedingungenSupersedes December 1969 edition.In keeping with current practice in standards published by the International Organization for Standardization (ISO).a commahas been used throughout as the decimal marker.See Explanatory notes for connection with ISO/DIS 683/11-1985 published by the International Organization for Stand-ardization (ISO)and EURONORM 84-70 published by the European Coal and Steel Community (ECSC).The clauses and subclauses marked with a single dot give specifications which are to be agreed upon at the time ofordering.The subclauses marked with two dots give specifications which are optional and may be agreed upon at thetime of ordering.1 Field of application2.2 Product forms1.1 This standard applies toThe definitions given in EURONORM 79 shall apply for thesemi-finished products,e.g.blooms,slabs,billets.produet forms.hot rolled wire.-hot rolled or forged steel bars (round,square.hexagonal,2.3 Types of heat treatmentoctagonal and fiat steel bars).The terminology used in DIN 17014 Part 1 shall apply for thehot rolled wide flats,types of heat teatment reterred to in this standard.-hot or cold rolted plate.sheet and strip.andhammer forgings and drop forgings3.Dimensions,permissible dimensionalmade from the case hardening steels listed in table 2.deviations and deviations of formThe heat treatment conditions in which the various productforms concerned can be supplied are shown in table 1,andThe nominal sizes,the permissible dimensional deviationsthe possible particular surface finishes are given in suband deviations of form for the products shall be agreed atclause 7.2.2.the time of ordering,reference being made,if possible.tothe appropriate dimensional standards(see Appendix B).Note 1.DIN Standards covering steels which are to meetthe same requirements regarding chemical composition as given in table 2.but are supplied in other4Massesproduct forms or other treatment conditions.intended for particular applications,and also DINThe masses of the steels covered by this standard havebeen calculated taking the density as 7,85 kg/dm3Standards covering similar steel grades are listed inthe "Other relevant standards"clause.Note 2.Hammer forged semi-finishedproducts.for5Designation and orderingexample biooms,slabs,billets and hammer forged5.1steel bars are referred to in this standard as"semi-The standard designation for steel complying with thisfinished products"and"steel bars"and not as"ham-standard.shall give in the following order:mer forgings and drop forgings".the name of product(steel);the number of this standard:1.2 In addition to the requirements specified in this stand-ard.the general technical delivery conditions for steel andthe symbol or material number identifying the steelgrade (see table 2)*):steel products given in DIN 17010 shall apply unless other.wise specified in this standard.where applicab