IS 513 (2008): Cold reduced low carbon steel sheets and strips

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3 1 JULY 2010 TO IS 513 : 2008 cold reduced LOW carbon steel sheet AND STRIP ( Fifth Revision ) (Page 1, clause 3) Insert CR0 , before CR1 . (Page 1, clause ) Substitute the following for the existing first para: sheets and strips of CR2, CR3, CR4 and CR5 grade shall be supplied in annealed and skin passed condition. Grade CR0 shall be supplied in hard condition. sheets and strips of CR1 grade may be supplied in any of the following condition: (Page 2, clause ) Substitute the following for the existing: CR0 and CR1 grade sheets and strips may be supplied rimmed, semi-killed, killed or as agreed between the purchaser and the manufacturer.

4 However, other grades shall be supplied only in fully killed condition. CR4 and CR5 grade sheets and strips shall be supplied only in fully aluminium killed condition. (Page 2, Table 1) Substitute the following for the existing: Table 1 Chemical Composition (Clauses and ) Quality Constituent, Percent, Max Sl No. Designation Name carbon Manganese Sulphur Phosphorus (1) (2) (3) (4) (5) (6) (7) i) CR0 Hard ii) CR1 Commercial iii) CR2 Drawing iv) CR3 Deep Drawing v) CR4 Extra Deep Drawing Aluminium Killed (Non-ageing) vi) CR5 Extra Deep Drawing (Stabilized Interstitial Free) NOTES 1 Restricted chemistry may be mutually agreed between the purchaser and the supplier.

5 2 When the steel is killed by aluminium alone the total aluminium content shall be - percent. When steel is silicon killed, the silicon content shall not be less than percent. When the steel is aluminium-silicon killed, the silicon content shall not be less than percent and total aluminium content shall not be less than percent. 3 The nitrogen content of the steel shall not be more than percent. However for CR0 and CR1, the nitrogen content shall not exceed percent. This shall be ensured by the manufacturer by occasional check analysis. 4 The material may be supplied in the copper bearing quality in which case the copper shall be between and percent on ladle analysis.

6 In case of product analysis, the copper content shall be permissible in between and percent. 5 The steel can be made with micro-alloying elements like niobium, vanadium, titanium and boron either individually or in combination, on mutual agreement in which case the total micro-alloying elements shall not exceed percent in ladle analysis. However, in case of boron, the limit shall be percent. 1 Amend No. 1 to IS 513 : 2008 (Page 5, Table 3) Substitute the following for the existing: Table 3 Mechanical Properties at Room Temperature in as Delivered Condition (Clauses , , , and ) Quality Elongation Percent, A, Min Hardness Max Sl No. Designation Grade Yield Stress Re MPa Tensile Strength Rm MPa Lo = 80 mm Lo = 50 mm HRB HR(30T) Bar, r Min Bar, n Min (1) (2) (3) (4) (5) (6) (7) (8) (9) (10) (11) i) CR0 H See Table 5 O See Table 5 340 260 Min 340 Min 26 29 390 300 Min 390 Min 23 26 ii) CR1 440 350 Min 440 Min 20 23 iii) CR2 D 240 Max 370 Max 30 31 65 60 iv) CR3 DD 220 Max 350 Max 34 35 57 55 v) CR4 EDD 210 Max 350 Max 36 37 50 50 IF 190 Max 350 Max 38 40 IF340 125-225 340 Min 30 34 IF390 165-245 390 Min 27 31 IF440 185-295 440 Min 24 28 BH270 225-345 270 Min 31 35 BH320 150-200 320 Min 28 32 vi)

7 CR5 BH370 180-250 370 Min 25 29 NOTES 1 1 MPa = 1 N/mm2 = 1 MN/m2 = 0 kgf/mm2. 2 For materials up to and including mm in thickness, the elongation values in the table shall be reduced by 1. 3 Equivalent Vickers hardness values are allowed on agreement between the interested parties at the time of ordering. The hardness of sheet thinner than mm shall be measured exclusively in compliance with the HR 30T scale. 4 Mechanical properties are not generally done on Commercial Quality Products and the values in this table are for information only. 5 For CR4 Grade, Bar r can be given based on mutual agreement between the purchaser and the supplier. (Page 6, Table 5, Title) Insert CR0 and before CR1.

8 (Page 6, Table 6, Row 1) Delete. (Page 7, Table 7, Title) Insert CR0 and before CR1 . (MTD 4) Reprography Unit, BIS, New Delhi, India 2 Wrought SteelProductsSectionalCommittee,MTD 4I'OREWORDThis IndianStandard(Fifth Revision) wasadoptedby the BureauofIndianStandards,after the draft finalized bythe Wrought SteelProductsSectionalCommitteehad beenapprovedby 1954 andrevisedin 1963, 1973, 1986 and ,in the lightofexperiencegained during these years, theCommitteedecidedto revise it to bring in linewith thepresentmanufacturingand tradepracticesbeing followed in the country in this ,the followingmodificationshave beenmade:a) [SOdesignationshave beenadopted,b)Table IandTable 3 have beenmodified,c) New grade CR5 Extra Deep Drawing(stabilizedinterstitial free) has been added,d)Corelationofolddesignationswith newdesignationshas been given forinformation(seeAnnexA),e)Anewclauseon referenceshasbeenincorporated,l) beenincorporated,g) IS 8910.]

9 1978 has beenadoptedfor generaltechnicaldeliveryrequirements,h) Clause on retest has been modified,j)Valuestorplasticanisotropy(r) and strainhardeningexponent(n)have beenincorporated,k)Applicableperiodforme chanicaland physicalpropertieshas been included,m)Requirementsofdimensionalands hapetoleranceshavebeenseparatedfromthest andardandadoptedIS/ISO16162:2005'Continu ouslycold-rolledsteel sheetproducts-Dimensionaland shapetolerances',andn)Aclauseforalternat etest method specified in relevant ISOIJECS tandardhas been beenderivedfrom the following:ISO3574:1999BS EN10130:1991 cold -reducedcarbon steel sheetofcommercialanddrawingqualitiesCold rolledlow carbon steel flatproductsfor coldfanning:TechnicaldeliveryconditionsT hecompositionofthe Committeeresponsiblefor formulationofthisstandardis given in Annex C,For thepurposeofdecidingwhethera particularrequirementofthisstandardiscom pliedwith, the finalvalue,observedorcalculated,expressi ngthe result of a test or analysis, shall be roundedoffinaccordancewithIS 2 : 1960'Rulesforroundingoffnumerical values(revised)'.

10 The numberofsignificantplacesretainedinthero undedoffvalue should be the same as thatofthespecifiedvalue in this standard. IS513:2008 IndianStandardCOLDREDUCEDLOWCARBONSTEELS HEETANDSTRIP( FifthRevision)1 SCOPE3 CLASSIFICATIONOFGRADESThis standard covers the requirementsofcold reducedlowcarbonsteelsheets and strips for bending anddrawingpurposeand where the surface sheets and strips up to mmthick, both in coil form and cut and strips shall be classified in theCRI,CR2,CRJ,CR4 and CR5 General requirements relating to the supplyofcoldrolled low carbon steel sheets and strips shall this text, constitute provisionsofthis standard. At the timeofpublication,the editionsindicatedwerevalid.