DIN-17230-1980-Ball-and-Roller-Bearing-Steels

UDC669.14.018.2:621.822.6/.8:001.4:620.1September 1980Ball and Roller Bearing SteelsD瓜Technical Conditions of Delivery17230Walzlagerstahle;Technische LieferbedingungenFor connection with the International Standard ISO 683/XVII-1976 issued by the International Organization forStandardization (ISO)and with the EURONORM 94-73 issued by the European Coal and Steel Community,seeExplanations.The sections marked with a dot()contain details of arrangements which either must be made or can be made at thetime of placing the purchase order.1 ScopeStahl-Eisen-Prifblatt 1570 Beiblatt 1(Steel-Iron TestThis Standard encompasses the steels generally used forSheet 1570 Suppl.1)1)Microscopicball and roller bearing components(balls,rollers,needles.examination of high grade steels inraces and discs).It applies to the steel grades listed inrespect of narrow elongated non.Table 1 and to the product shapes and heat treatmentmetallic inclusionsconditions and surface conditions featured in Table 2.Handbuch fur das Eisenhuttenlaboratorium (Handbookfor the Ferrous Metallurgy Labor.atory)1):Vol.2:Die Untersuchungder metallischen Stoffe (The examin-2 Other relevant Standards and documentsation of metals);Dusseldorf,1966:DIN 1605 Part 1 Testing of materials;mechanicalVol.5(Erganzungsband)(Suppl.testing of metals;general andVol.):A4.1 -Aufstellung empfohacceptancelener Schiedsverfahren (List of re-DIN 5401Rolling bearing components,ballscommended arbitration methods),D1N50049Certificates on material testingsB-Probenahmeverfahren (Sam-pling procedures),C-Analysenver.DIN50115Testing of metallic materials,fahren (Analyses procedures);refernotched bar impact bending testto the most recent edition in each caseDIN 50 133 Part 1 Testing of metallic materials;In addition,see the dimensional Standards in Appendix A.Vickers hardness testing;test loadrange:49 to 980 N(5 to 100 kp)3 TermsD1N50145Testing of metallic materials;tensiletest3.1 Ball and roller bearing steelsDIN50191Testing of ferrous materials;endBall and roller bearing steels are steels for components ofquench test,sample lengthball and roller bearings which are subjected during opera-100 mm,sample diameter 25 mmtion first and foremost to high local alternating stressesDIN50192Determination of decarburizingand are exposed to abrasive wear.In the worn conditiondepththey exhibit hard spots,at least in the surface zone.DIN50351Testing of metallic materials:Brinell3.2 Product shapehardness testingThe definitions of EURONORM 79 apply to the productEURONORM 79Nomenclature and classification ofshapes.steel products in accordance withshapes and dimensions3.3 Heat treatmentEURONORM 103-71 Microscopic determination of theThe definitions and technical terms of DIN 17 014 Part 1ferrite or austenite grain size ofapply to the types of heat treatment mentioned in thissteelsStandard.Stahl-Eisen-Prufblatt 1520(Steel-Iron Test Sheet 1520)1)Microscopic examination of the car-4 Dimensions and permissible dimensionalbide configuration in steels w