bids are invited for chemical compositions:- 1) al2o₃+tio₂ min. 41%, fe₂o₃, max 1.5%, tio₂, max 2.0% 2) refractoriness (pce) 1750°c 3) apparent porosity (max.) 16% 4) c.c.s, 500kg/cm2 (min.), 5) refractoriness under load (rul) ta 1440°c at 2 kg/cm2 load (min.) 6) p.l.c, (max) ±0.3%at 1450˚c for 4 hours. , chemical compositions: - 1) al2o₃+tio₂ min. 32%, fe2o3, max. 2.5%, tio2, max. 2% 2) refractoriness (pce) min. 1670°c 3) apparent porosity (max) 22% 4) cold crushing strength (c.c.s), 250kg/cm² min. 5) refractories under load(rul) at 2kg/cm² load min ta 1350˚c. 6) p.l.c, (max) ±0.6% at 1350˚c for 4hrs. 7) reversible thermal expansion (rte) max. 0.68% at 1000°c 8) spalling resistance (min.) 20 cycles. , 1) alumina+titania 37% min., titania 2% max., ferric oxide 2.5%max. 2) refractoriness shall not be less than orton cone 32 3) apparent porosity shall not be more than 20% 4) cold crushing strength (c.c.s), shall not be less than 200kg/cm² 5) refractories under load(rul) shall not be less than ta 1350˚c at 2kg/cm² load . 6) p.l.c, shall not be more than ±0.4% at 1350˚c for 4hrs. 7) spalling resistance shall not be less than 20 cycles. 8) reversible thermal expansion shall not be more than (rte) 0.68% at 1000°c 9) bulk density should not be less than 2gm/cc. total quantity : 22350