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 :