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Cold Rolled Coils and Sheets
Thickness (mm) Width (mm)
0.27, 0.30, 0.35 900, 905, 910, 914, 9200.40, 0.45 900, 905, 910, 914, 920, 1000, 1005, 1010, 10200.5 900, 905, 910, 914, 920, 1000, 1005, 1010, 1020, 1105, 11200.55, 0.58 900, 905, 910, 914, 920, 1000, 1005, 1010, 1020, 11050.60 900, 905, 910, 914, 920, 1000, 1005, 1010, 1020, 1100,1105, 11200.63 900, 905, 910, 914, 920, 1000, 1005, 1010, 1020, 1100, 1105, 1120, 1219, 1250, 12700.70 900, 905, 910, 914, 920, 1000, 1005, 1010, 1020, 1105, 1219,1250, 12700.8, 0.9 900, 914, 920, 1000, 1020, 1120, 1219, 1250, 1270, 14201.00 900, 914, 920, 1000, 1020, 1120, 1219, 1250, 1270, 1320, 1420, 1520, 1580, 16201.25 900, 914, 920, 1000, 1020, 1120, 1219, 1250, 1270, 1320, 1420, 1520, 1580, 16201.5, 1.6, 1.85 900, 914, 920, 1000, 1020, 1120, 1219, 1250, 1270, 1320, 1420, 1520, 1580, 16202.00 900, 914, 920, 1020, 1120, 1219, 1250, 1270, 1320, 1420, 1520, 1580, 1620
0.20, 0.22 and 0.25 mm thicknesses of CR material are rationalized in respect of Full Hard Quality CR Coils only– 900, 920 mm as rationalized width.Bitumen Barrel Size0.63 876, 896, 1120(Barrel Size) :0.9 914, 920, 1225, 13201, 1.2, 1.25 914, 920, 1225, 1320, 1580
Note : 914 width in barrel thickness may be available as dimension out of barrel production
Coil Dimension : Outer diameter : 2200 mm, maximum. Internal diameter : 510 mm (thickness 0.63 mm andbelow and width up to 1020 mm) and 600 mm (for other sizes) and Coil weight: 6-23 tonnes (as per size)Tolerance as per IS /ISO – 16162/2005Common Grades : IS 513/2008 (O, D, DD & EDD), IRSM 41, SAILCOR, Copper Bearing, HSCR - 26/35. BokaroSteel Plant also produces cold rolled coils and sheets to the following foreign specifications : ASTM A 568/366,BS-1449-Pt-1, JIS G 3141 SPCC/CD, DIN-1623 St 12.3 or equivalent, if sufficient orders are available.
Rourkela Steel Plant : Rationalised Sizes of CR CoilsThickness (mm) Width (mm)
0.35, 0.4 9000.5, 0.63 900/10000.8, 1.0, 1.25 900/1000/12501.85, 2.0 1250
Coil weight : 3 to 15 tonnes for width above 1100 mm and 3 to 10 tonnes up to 1100 mm width.Coil Internal Diameter : 610 mm (CR-1 route) and 510 mm (Tandem Mill route).Common Grades : IS 513/2008 GradeNote : Some quantity may be available in mixed thicknesses of 0.3 - 0.5 mm and mixed widths of750-1000 mm
Bokaro Steel PlantRationalised sizes of CR Coils
Bokaro Steel Plant
Thickness (mm) Width (mm) Length (mm)
0.60, 0.63, 0.70 900, 1000, 1100, 1250 2000, 2500, 3000, 3600
0.80, 0.90 900, 1000, 1100, 1250, 1400 2000, 2500, 3000, 3600
1.00, 1.25, 1.50, 900, 1000, 1100, 1250, 2000, 2500, 3000, 36001.60, 1.85, 2.00 1400, 1500
Barrel Size
1.0/1.25 915, 920 1815
1.0/1.25 1315, 1320 1970, 2000
Common grades : IS 513/2008 (O, D, DDK, EDB), IRSM 41, SAILCOR, Copper Bearing
CR coils/sheets are supplied in oiled/unoiled condition as per customers’ requirements.
Tolerance as per IS - 513/IS/ISO/16162 (2005)
Rourkela Steel PlantRationalised sizes of Cold Rolled SheetsThickness (mm) Width (mm) Length (mm)
1.0, 1.25, 1.6 1250 2500
Common grades : IS 513/2008 Grade
Tolerances as per IS 513/IS/ISO 16162 (2005)
Packaging : CR CoilsCoils are first packed with paper and high-density polythene and then secured with steelstrapping. A coil is strapped with three eye and two circumferential straps. For identification,one sticker and one metallic tag with a sticker are provided. These are then loaded into wagonswith the eye of the coil in horizontal position. Coils are then unitised by strapping.
Packaging : CR SheetsThese are packed in packets of 3 - 10 tonnes each and covered with high density polythene andpaper. Thereafter, these are bound with steel straps. They also have stickers inside the packetsand metal tags attached to the strips.
Rationalised sizes of Cold Rolled Sheets
Dimentions and tolerances in millimetres
Specified Thickness tolerances a, b
width for specified thicknesses c
≤ 0.4 >0.4 ≤0.6 >0.6 ≤0.8 >0.8 ≤1.0 >1.0 ≤1.2 >1.2 ≤1.6 >1.6 ≤2.0 >2.0 ≤2.5 >2.5 ≤3.0 >3.0 ≤4.0
600≤1200 ±0.04 ±0.05 ±0.07 ±0.08 ±0.09 ±0.11 ±0.13 ±0.15 ±0.18 ±0.20
>1200 ±0.50 ±0.06 +0.08 ±0.09 ±0.10 ±0.12 ±0.14 ±0.16 ±0.19 ±0.21≤1500
>1500– ±0.08 ±0.09 ±0.10 ±0.12 ±0.14 ±0.16 ±0.18 ±0.21 ±0.23≤1800
a. The thickness tolerances for sheet in coil form are the same as for sheet supplied in cut lengths but, in caseswhere welds are present, the tolerances shall be double those given over a length of 15 m in the vicinity of theweld.
b. For specified strength levels of Re = 360 N/mm2 and greater, increase the thickness tolerances by 10%, applyingnormal rounding-off proceedures.
c. Thickness is measured at any point on the sheet not less than 25 mm from a side edge.
Table 1 : Normal thickness tolerances for coils and sheets
Table 2 : Width tolerances for coils and sheetsDimensions and tolerances in millimetres
Specified width Tolerance
≤1200 +3 0
>1200 ≤1500 +5 0
> 1500 +5 0
Note : For resquared material, more restrictive tolerances are subject to negotiation.
Table 3 : Length tolerances for sheetsDimensions and tolerances in millimetres
Specified width Tolerance
≤2000 +10 0
>2000 ≤8000 +0.5% X length 0
> 8000 +40 0
Note : For resquared material, more restrictive tolerances are subject to negotiation.
Chemical Composition
Mechanical PropertiesDesignation Grade SAIL Name YS, UTS, % EI min Hardness
MPa min MPa min LO=80 LO=50 HR B HR 30T
mm mm
CRO H
CR1 O
340 HSCR 26 260 340 26 29
390 HSCR 30 300 390 23 26
440 HSCR 35 350 440 20 23
CR2 D 240 370 30 31 65 60
CR3 DD 220 350 34 35 57 55
CR4 EDD 210 350 36 37 50 50
Designation Grade SAIL Name C max Mn max S max P max
CRO H 0.25 1.7 0.45 0.050
CRI O
340 HSCR 26
390 HSCR 300.15 0.60 0.040 0.050
440 HSCR 35
CR2 D 0.12 0.50 0.035 0.040
CR3 DD 0.10 0.45 0.030 0.025
CR4 EDD 0.08 0.40 0.030 0.020
Al : 0.02-0.07% if Al-killed, Si>0.1% if Si killed, Si>0.03% and Al>0.01% if Si-Al killed.MAE (Nb, V, Ti, B) <0.20% either singly or in combination.If only B is added it should be <0.006%.
IS 513 : 2008
Specification Grade C max Min max S max P max Al min Si max MAE max
Super EDD 0.04 0.15 0.015 0.015 0.025 - 0.030.06
SAIL RIM IS 0.07 - 0.35 - 0.04 0.04 0.0615391:2003 0.11 0.45
Semi Processed 0.05 0.25 - 0.02 0.025 0.08 - 0.5 -Electrical Steel 0.50 0.12 0.7
SAILCOR IRSM-41 0.1 0.25 - 0.03 0.075 - 0.08 0.28 - Ni : 0.2 - 0.470.45 0.140 max 0.72 Cu : 0.3 - 0.6
Cr : 0.35 - 0.6
Specification Grade YS, MPa UTS, MPa % El min n bar r bar80 mm GL
Super EDD 190 max 300 max 40 1.7 min 0.22 min
SAILCOR IRSM-41 300 440 min 26
Output from the new CRM mill at Bokaro
Thickness - 0.25 – 2.0 mmWidth - 800 – 1560 mmCoil ID - 500 mmCoil OD - 1000 – 2000 maxCoil weight - 31 tonnes maxSpecific Coil weight - 20 kg / mm (max)
Applications
Specification Size Application
Full Hard IS 513 O 0.27 to 0.60 mm Coated Sheetsun-annealed thickness
SAILNOXIS: 513 O (Sk)/D (K) Bitumen and Barrel sizes Packaging
SAIL PRESS Household applicationsIS: 513 D/DD/EDD All sizes Automobile
IS: 513 O (Sk)/D (K) 0.8 to 2 mm thickness Precision tubes
SAILCOR (IRSM41) 1.25 to 2 mm thickness Railway Coaches/Wagons
IS: 513 O/D with Cu 0.63 to 2 mm thickness Corrosion resistanceapplications
SAILRIM, SAILHUB 0.56 to 0.9 mm thickness Cycle manufacturingSAILMUDGUARD
SEMI PROCESSED 0.5 to 0.63 Fractional Horse PowerELECTRICAL Motors & ElectricalSTEEL, SAIL LEC Applications
HSCR 26/30/35 0.8 to 2.0 Load bearing componentsIS:513 CRI for automobiles,340/390/440 Roll formed sections,
Industrial storagesystems, Drums,Barrels etc.
Galvanised Plain Sheets/Coils & Galvanised Corrugated SheetsGalvanised steel sheets/coils are produced as per IS: 277/2003.
Rationalised sizes of Galvanised Plain Coils
Thickness (mm) Width (mm)
0.3, 0.35, 0.4, 0.45 900, 1000
0.5, 0.55, 0.6 900, 1000,1100
0.63, 0.7, 0.8, 1.0, 1.25, 1.4, 1.6 900, 1000, 1100, 1200, 1220
Rationalised sizes of Galvanised Plain SheetsThickness (mm) Width (mm) Length (mm)
0.3, 0.35, 0.4, 0.45 900, 1000 2500, 3000
0.5, 0.55, 0.6 900, 1000, 1100 2500, 3000
0.63, 0.7, 0.8, 1.0, 1.25, 1.4, 1.6 900, 1000, 1100, 1200, 1220 2500, 3000
Width 1250 mm can be supplied on negotiation
Rationalised sizes of Galvanised Corrugated SheetsThickness (mm) Width (mm) Length (mm)
0.3, 0.35, 0.4, 0.45, 0.5, 0.55, 0.6, 800, 880, 885 2500, 3000, 36000.63, 0.7, 0.8, 1.0, 1.25, 1.4, 1.6
GP Coil and Sheets in 0.30 (30) can be supplied by mutual agreement
Rationalised sizes of Galvanised Plain SheetsThickness (mm) Width (mm) Length (mm)
1.25, 1.0, 0.8, 0.63, 0.5 900, 1000 2500
0.4, 0.35 900 2500
Bokaro Steel Plant
Rourkela Steel Plant
Rationalised sizes of Galvanised Corrugated Sheets
Thickness (mm) Width (mm) Length (mm)
1.25 (18), 1.00 (20), 0.8 (22), 0.63 (24), 0.50 (26) 810, 910 2500, 3000
GC Sheets in 0.40 (28) and 0.45 (27) can be supplied by mutual agreement
Plant GP sheets GC sheets
BSL 5 - 11 tonnes 5 -11 tonnes
RSP 3 - 10 tonnes 3 -9 tonnes
Special Coated Products from Bokaro Steel Plant
(i) Galbo GP coils : Base Material is CRCA Grade ‘O’ (Sk) which is Skin Passed and stretcherlevelled. Sheets will have normal spangles.
(ii) Galbo MSS GP coils : The base material is same as in (i). Sheets will have virtually noobservable spangles.
Various zinc coatings available from BSL and RSP, as per specificationIS: 277/2003 (with revision I of 2008) are as follows :
Class of coating Zinc wt g/m2 Plant
CL II 450 RSP
CL III 350 RSP
CL IV 275 RSP/ BSL
CL V 220 RSP/ BSL
CL VI 200 RSP/ BSL
CL VII 180 RSP/ BSL
CL VIII 120 RSP/ BSL
CL IX 100 RSP/ BSL
CL X 80 RSP/ BSL
Note : GP/GC sheets from Bokaro Steel Plant are supplied under the Brand Name “SAIL JYOTI”.
Applications
Material Application
GP Panelling, door frames, shutters, AC ducts,coolers, storage bins, auto sector, ice box,drums, buckets, tubs, tanks, trunks etc.
GC Roofing, Industrial sheds etc.
Packet Weight of GP/GC Sheets
Applications
Material Application
GP Panelling, door frames, shutters, AC ducts,coolers, storage bins, auto sector, ice box,drums, buckets, tubs, tanks, trunks etc.
GC Roofing, Industrial sheds etc.
SI. No. Quality Yield Tensile ElongationStress, Strength Percent
Re, MPa Rm, MPa A Min.
Designation Name Lo=80 Lo=50mm mm
i) GP Ordinary - - - -
ii) GPH Ordinary-Hard 400, Min. - - -
iii) GC Corrugated ordinary - - - -
iv) GPL Drawing 350, Max. 450, Max. 24 25(Lock Forming)
v) GPD* Deep Drawing 280, Max. 430, Max. 26 27
vi) GPED* Extra deep drawing 260, Max. 430, Max. 28 31
vii) GPIF* Interstitial Free 240, Max. 370, Max. 34 36(Stabilized)
* Can be supplied after commissioning of New Galvanizing Line in CRM-III
Mechanical Properties
Plain Galvanized sheets and coils available from BSL, conforming to mechanical properties requirementsas per IS 277:2003 (amendment No.4, 2011), are as follows :
Recommended