1 Rationalised sizes of Blooms, Billets and SlabsSemisItemSizeSectional WeightMillmm kg/mBloomsBhilai Steel Plant150 x x x x x x x x Steel Plant200 x x x x x x x x x x x x x x x x Steel Plant280 x Steel Plant 90 x 90 x 100 x 110 Steel Plant100 x 100 x Steel Plant150 x used :BCCS:Bhilai Continuous Casting ShopBBLM:Bhilai Blooming MillBBM:Bhilai Billet MillBMM:Bhilai Merchant MillDBLM:Durgapur Blooming MillDBCP:Durgapur Bloom Caster PlantDBM:Durgapur Billet MillDCCP:Durgapur Continuous Casting PlantIBCP:ISP Bloom Caster PlantICCP:ISP Continuous Casting PlantItemSizeSectional WeightMillmm kg/mSlabs Bhilai Steel Plant200 x x x x x x x x x x Steel Plant160 x x x x x x grades : IS 2830, IS 2831, SAE 1070, EN 8,EN 9, SAIL Tower, SAILMA, 20 Mn Cr 5, IS 1875, SWR-14, SAIL HCRC hemical CompositionSpecificationGradeC% Mn%P% maxS% maxIS 2830/2012C15 maxIS 2831 TowerGrade 6 (DSP) 350 *20Mn Steel55 Si ( ) ( )SUP : , Cr: , Cu+8Sn: maxSUP , Cr , B min, Cu+8Sn: maxHigh CarbonSAE 1080* will be supplied only on the basis of chemical analysis in case of SemisNotes :IS 2830/2012: (1) Min Si content not less than in Silicon killed Steel .
2 (2) Total micro alloying elementslike Nb, V and Ti not to exceed (3) Copper content shall be between and , if agreed.(4) All types of Steel in above specification may be supplied in three grades A, B, & C, having Sulphur,Phosphorous (ladle analysis) and Carbon equivalent as follows: Grade A - Sulphur and Phosphorus max, CE max; Grade B - Sulphur and Phosphorus each max, CE max; Grade C - Sulphurand Phosphorus each max, CE 2831/2012: (1) Semi finished Steel products - such as Blooms, Billets, Slabs which are fit for furtherprocessing. The dimension and tolerances for this product shall be as per mutual agreement. (2) Microalloying may be allowed subject to mutual agreement between the purchaser and the manufacturer. Microalloying elements like Nb, V or Ti when used individually or in combination, the total content shall notexceed per cent. (3) While placing order the Steel should be designated by designation.
3 (4) Coppermay be present between to per cent as mutually agreed to between the purchaser and themanufacturer. The copper bearing quality Steel shall be designed with a suffix Cu, for example, C15 Cu. (5)For grade C22, other requirements shall be as per relevant finished products standard. (6) In order to getdesired properties, the chemical composition may be mutually agreed to between the manufacturer andthe purchaser conforming to stipulation IS MaxMn% MaxP% MaxS% MaxIS 1875 Class : , Cr : maxASTM (Cu-P) : min50 * will be supplied only on the basis of chemical analysis in case of across ThicknessTolerancesFlat (mm)(mm)(mm)IS:2830 BilletsUp to 75 75 3 BloomsUp to 150 + , - 150 + , - to 300 Over 150+ , - to 150+ , - 300Up to 150+ , - 2830Re-rolling into structurals, rounds and rebarsIS 2831 Commercial grade for re-rolling into structurals and 1070 Manufacture of tractor discsEN 8, EN 9 Forging purposesIS 1875 SAIL TowerRe-rolling into structurals for TLT segmentSAILMA 350Re-rolling into high tensile structurals20 Mn Cr 5 Case hardening Steel for automobile gearSWR-EQ (IS.)
4 2879)Welding electrodes, welding m/c wiresSWR-14Re-rolling into wire rodsSWR-10Re-rolling into wire meshSAIL HCRRe-rolling into high corrosion resistant rebarsSAIL HCR-EQRRe-rolling into high corrosion and earthquake resistant rebarsSAIL BoronTractor discSpring Steel /Sup 11A/Sup-9 Helical/Leaf Springs, Rail ClipsChain SteelChain linksHigh CarbonWire rope, cycle spoke, Tyre bead A 105 Pipe FlangesSAE 1070:Si 8, EN 9:Si Tower:(for grades 4, 5 & 6) : Nb/V min. CE - Gr-1 ,Gr-2 & 3 , Gr-4 , Gr-5 , Gr-6 :Nb+V+Ti max20 Mn Cr 5:Cr 1875:Si HCR:Content of corrosion resistant elements will be min,S+P = maxHigh Carbon:Si = * SAIL Boron, SAIL spring & high carbon Billet produced from DSP with EMS