QUALITY
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QUALITY |
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In order to achieve
total customer satisfaction it is important to meet their expectations
in terms of quality and prompt, professional response to their needs.
It is this belief that makes Vardhman fully geared to provide pre and
post sales technical support to it's customers including assistance in
material selection. |
| 1. Spectrometer Atocomp 7000-Jarrell Ash,ARL 4460-Themo Electron S.A. | 9. Image Analyser System. |
| 2. Mobile Spectrometers. | 10. Ultrasonic Flaw Detecors |
| 3.Wet Analytical Laboratory. | 11. Magna Flux Machine |
| 4. Oxygen & Nitrogen determinator-LECO. | 12. Universal Testing Machine. |
| 5. Carbon & Sulphur Determinator-LECO. | 13. Impact Testing Machine . |
| 6. Active O2 determinator in Liquid Steel-CELOX. | 14. Jominy Hardenbility Testing Facility. |
| 7. Total Hydrogen determinator in Liquid Steel-HYDRIS. | 15. Metascope. |
| 8. Metallurgical Microscope with photography arrangements-CARL ZEISS. | 16. Portable Alloy Analyser (XRF). |
| GENERAL REQUIREMENT AND QUALITY PARAMETERS - HOT ROLLED BARS | |||||||||||
| S.NO | GENERAL REQUIREMENT & QUALITY | V.S.S. OFFER | |||||||||
| PARAMETERS | |||||||||||
| 1 | STEEL MELTING AND CASTING | PROCESS ROUTE : | |||||||||
| PROCESS | |||||||||||
| Electric Arc Furnace -- Ladle Refining Furnace -- Vacuum | |||||||||||
| Degassing -- Continuous Casting (AMLC & EMS) -- | |||||||||||
| Hot Rolling -- Annealing (Optional) . | |||||||||||
| CONTINUOUSLY CAST ELECTRO MAGNETICALLY | |||||||||||
| STIRRED BY MOULD " EMS " & LIQUID LEVEL IN MOULD | |||||||||||
| CONTROLLED BY AMLC . | |||||||||||
| 2 | REDUCTION RATIO | UPTO 80 RCS / 90 MM DIAMETER : 1 : 6 MINIMUM | |||||||||
| > 80 RCS / 90 MM DIAMETER & : 1 : 4 MINIMUM | |||||||||||
| < = 100 RCS / 110 MM DIAMETER | |||||||||||
| 3 | CHEMICAL COMPOSITION | AS PER BIS / DIN / IS / BS / ASTM / JIS SPEC'S | |||||||||
| AS SPECIFIED BY CUSTOMER | |||||||||||
| * | TRAMP ELEMENTS : | AS SPECIFIED IN THE RELEVANT STANDARD | |||||||||
| 4 | LENGTH | BARS SHALL BE IN RANDOM / STD. LENGTHS OF | |||||||||
| 4 TO 6 MTRS UPTO 70 MM DIA. & 63 MM RCS AND | |||||||||||
| 3 TO 6 MTRS > 70 MM DIA. & 63 MM RCS | |||||||||||
| WITH MAXIMUM 10% SHORTS DOWN TO 1.0 MTR. ( BY WEIGHT). | |||||||||||
| BARS CAN ALSO BE SUPPLIED IN MULTIPLE LENGTH OR IN FIX | |||||||||||
| LENGTH OR UNIT LENGTH AS SPECIFIED BY CUSTOMER . | |||||||||||
| 5 | SURFACE DEFECTS | MAXIMUM 1.0% OF SECTION DIMENSION OR | |||||||||
| (LIKE SEAMS, SCRATCHES, ROLL MARK, LAPS | 0.5 MM WHICHEVER IS LESS IN CASE OF | ||||||||||
| FOLDS ETC.) | HOT ROLLED OR ANNEALED BARS . | ||||||||||
| REFERENCE : IS 13352 : 1992 | |||||||||||
| 6 | DECARBURIZATION | TOTAL ( FULL + PARTIAL ) < = 1.0 % OF SECTION OR 0.5 MM | |||||||||
| WHICHEVER IS LESSER , IN CASE OF HOT ROLLED BARS. | |||||||||||
| REFERENCE : IS 6396 : 2000 | |||||||||||
| TOTAL ( FULL + PARTIAL ) < = 1.5 % OF SECTION | |||||||||||
| IN CASE OF ANNEALED BARS . | |||||||||||
| AS PER CUSTOMER 'S REQUIREMENT & MUTUALLY AGREED | |||||||||||
| AT THE TIME OF ORDER IN CASE OF ANNEALED CONDITION. | |||||||||||
| 7 | INTERNAL SOUNDNESS | UPTO 80 RCS / 90 MM DIAMETER : C2 R1 S1 MAX. | |||||||||
| REFERENCE : ASTM E-381 :1994 | > 80 RCS / 90 MM DIAMETER & : C2 R2 S2 MAX. | ||||||||||
| < = 100 RCS / 100 MM DIAMETER | |||||||||||
| 8 | INCLUSIONS RATING (AS PER IS - 4163) | NORMAL STEEL (SULPHER <= 0.035 %) . | |||||||||
| REFERENCE: IS 4163 OR ASTM E 45A:97 | A | B | C | D | |||||||
| THIN | 2.5 | 1.0 | 1.0 | 2.0 | |||||||
| THICK | NIL | NIL | NIL | NIL | |||||||
| HOWEVER , IN CASE OF SULPHER > 0.035 % , SEMI | |||||||||||
| FREE CUTTING STEEL AND FREE CUTTING STEELS | |||||||||||
| " A " TYPE INCLUSIONS COULD BE HIGHER THAN ABOVE. | |||||||||||
| 9 | GRAIN SIZE | ||||||||||
| REFERENCE : IS 4748 OR ASTM E-112 | ASTM 5 OR FINER FOR "AL" KILLED STEELS | ||||||||||
| 10 | JOMINY HARDENABILITY | AS SPECIFIED BY CUSTOMER AND MUTUALLY AGREED | |||||||||
| UPON AT THE TIME OF ORDER | |||||||||||
| REFERENCE : IS 3848 : 1981 | |||||||||||
| TESTING ERROR FROM ONE LABORATORY TO ANOTHER | |||||||||||
| REFERENCE : IS 1586 : 2000 | MAY BE + / - 1.5 HRC | ||||||||||
| 11 | DIMENSIONAL TOLERANCE / OVALITY . | IS 3739 : GRADE I . | |||||||||
| 12 | STRAIGHTNESS | 6 mm / Mtr max. - | IN HOT ROLLED BARS. | ||||||||
| 3 mm / Mtr max. - | IN MACHINE STRAIGHTENED | ||||||||||
| ( UPTO 70 MM DIAMETER ) | |||||||||||
| 13 | MACRO INCLUSIONS | THERE MAY BE FINE INDICATIONS - 2 NO'S MAXIMUM | |||||||||
| OF CUMULATIVE LENGTH 10 MM IN 1 / 10 SAMPLES | |||||||||||
| CHECKED ON MAGNETIC PARTICLE TESTING MACHINE . | |||||||||||
| REFERENCE : IS 4075 : 1985 | |||||||||||
| 14 | GAS CONTENT | ||||||||||
| CASE CARBURIZING STEEL | OXYGEN = 20 PPM MAX. | ||||||||||
| NITROGEN = 100 PPM MAX. | |||||||||||
| HYDROGEN = 1.5 PPM MAX. | |||||||||||
| THE GAS CONTENTS CAN ACHIEVE EVEN ON LOWER SIDE AS | |||||||||||
| POSSIBLE WITH MUTUAL AGREEMENT WITH CUSTOMER AT THE | |||||||||||
| TIME OF ORDER | |||||||||||
| THROUGH HARDENING STEELS / BEARING | OXYGEN = 15 PPM MAX. | ||||||||||
| STEELS . | |||||||||||
| NITROGEN = 100 PPM MAX. | |||||||||||
| HYDROGEN = 1.5 PPM MAX. | |||||||||||
| THE GAS CONTENTS CAN ACHIEVE EVEN ON LOWER SIDE AS | |||||||||||
| POSSIBLE WITH MUTUAL AGREEMENT WITH CUSTOMER AT THE | |||||||||||
| TIME OF ORDER | |||||||||||
| 15 | PACKAGING & BUNDLING | HOT ROLLED BARS : | |||||||||
| APPROX. WEIGHT OF BUNDLE - 2.0 MT | |||||||||||
| STEEL STRAP OR WIRE BINDING AT TWO PLACES | |||||||||||
| ON EACH BUNDLE | |||||||||||
| TAG ON EACH BUNDLE INDICATING HEAT NO. | |||||||||||
| GRADE , SECTION , NO. OF BARS , HEAT CODE . | |||||||||||
| GENERAL REQUIREMENT AND QUALITY PARAMETERS - BRIGHT BARS | |||||||||||
| PARAMETERS | |||||||||||
| 1 | SUPPLY CONDITION | ||||||||||
| * | HOT ROLLED -- ANNEALED (OPTIONAL) -- COLD DRAWN | ||||||||||
| * | HOT ROLLED -- ANNEALED (OPTIONAL) -- COLD DRAWN -- | ||||||||||
| CENTRELESS GROUND . | |||||||||||
| * | HOT ROLLED -- ANNEALED (OPTIONAL) -- PEELED . | ||||||||||
| * | HOT ROLLED -- ANNEALED (OPTIONAL) -- PEELED -- | ||||||||||
| CENTRELESS GROUND . | |||||||||||
| SUPPLY CONDITION SHALL BE AS SPECIFIED BY | |||||||||||
| CUSTOMER . | |||||||||||
| 2 | SURFACE DEFECTS | MAXIMUM 0.75% OF DIAMETER OR | |||||||||
| (LIKE SEAMS, SCRATCHES, ROLL MARK, LAPS | 0.3 MM WHICHEVER IS HIGHER IN CASE OF | ||||||||||
| FOLDS ETC.) | DRAWN BARS | ||||||||||
| REFERENCE : IS 13352 : 1992 | DRAWN & GROUND BARS - MAXIMUM 0.5 % OF THE DIAMETER | ||||||||||
| OR 0.20 MM WHICH EVER IS HIGHER . | |||||||||||
| PEELED / PEELED & GROUND BARS SHALL HAVE ZERO | |||||||||||
| SURFACE DEFECTS | |||||||||||
| FOR PEELED & GROUND BARS SURFACE ROUGHNESS LEVEL | |||||||||||
| SHALL BE Ra - 2.5 MICRONS MAX. | |||||||||||
| 3 | DECARBURIZATION | TOTAL ( FULL + PARTIAL ) < = 0.75 % OF DIAMETER | |||||||||
| IN CASE OF HOT ROLLED & DRAWN CONDITION . | |||||||||||
| REFERENCE : IS 6396 : 2000 | |||||||||||
| DECARBURIASATION - 1 % IN CASE OF ANNEALED & | |||||||||||
| DRAWN CONDITION . | |||||||||||
| DECARBURIASATION - NIL IN CASE OF PEELED | |||||||||||
| OR PEELED & GROUND CONDITION . | |||||||||||
| AS PER CUSTOMER 'S REQUIREMENT MUTUALLY AGREED | |||||||||||
| AT THE TIME OF ORDER IN CASE OF ANNEALED CONDITION. | |||||||||||
| 4 | DIMENSIONAL TOLERANCE : | ||||||||||
| (STANDARD) | * | DRAWN BARS | : h 11 | ||||||||
| * | DRAWN AND GROUND BARS | : h10 | |||||||||
| * | PEELED BARS | : h 11 | |||||||||
| * | PEELED AND GROUND BARS | : h10 | |||||||||
| 5 | STRAIGHTNESS | 1.0 mm / Mtr max. - | |||||||||
| 6 | PACKAGING & BUNDLING | ||||||||||
| COLD FINISHED BARS : | |||||||||||
| APPROX. WEIGHT OF BUNDLE - 1.0 MT | |||||||||||
| RUST PREVENTIVE OIL COATING ON 100 % BARS | |||||||||||
| IF REQUIRED FOR END APPLICATION . | |||||||||||
| IN CASE IF MPI TESTED BARS THE RESIDUAL MAGNTIZATION | |||||||||||
| LEVEL SHALL BE 0.3 GAUSS MAXIMUM. | |||||||||||
| EACH BAR WILL HAVE ONE END BANDSAW CUT & WILL | |||||||||||
| BE PASTED WITH STICKER SHOWING HNO, GRADE, SECTION . | |||||||||||
| PACKAGING OF BARS SHALL BE AS SPECIFIED BY CUSTOMER AND | |||||||||||
| MUTUALLY AGREED AT THE TIME OF ORDER . | |||||||||||
| TAG ON EACH BUNDLE INDICATING HEAT NO. | |||||||||||
| GRADE , SECTION , NO. OF BARS , | |||||||||||
