| Lloyds Steel - Wardha |
| Quality Policy |
| Internal & External Customer Satisfaction Through Value Addition And Continued Targeted Improvement |
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| Quality Control |
| • Laboratory |
| • Laboratory (Detailed) |
| • Hot Rolled Product Process Control & Inspection |
| • Process Control in CRM Complex |
| • Inspection in CRM Complex (SGS & Internal) |
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| Laboratory |
SPECTRO/LECO LABORATORY
- An automated laboratory for analyzing in-process samples from the melt shop and caster within a few minutes.
- 2 Spectrometers for Steel composition analysis
- 1 Spectrometer for zinc analysis
- LECO Carbon/Sulphur analyser
- LECO Oxygen/Nitrogen analyser
- LECO Hydrogen analyser
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PHYSICAL TESTING LABORATORY
- 3 nos universal Tensile Testing Machines of upto 100 tonnes for properties like yield strength, ultimate tensile strength, percent elongation
- Impact testing machine : Impact strength can be checked at minus 40 deg C to room temperature
- Erichsen Cupping Test Machine check the limiting dome height and other cupping characteristics
- Rockwell hardness testing machine
- Brinel hardness testing machine
- Study of microstructures are done on an image analysis system in a metallurgical microscope with magnification upto 1500X
- Drop Weight Tear Testing machine
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| Laboratory (Detailed) |
MECHANICAL/METALLOGRAPHIC
Universal Testing Machine – 20/40/100 T
Bending Cum Folding Machine
Rockwell Cum Superficial Hardness Tester
Vickers Hardness Tester
Brinel Hardness Tester
Portable Ultrasonic Flaw Detector
Portable Magnetic Flaw Detector
Erichsen Cupping Machine- Manual
Erichsen Cupping Machine – Hydraulic
Portable Hardness Tester (EQUOTIP)
Impact Testing Machine
Ultrasonic Thickness Gauge (0.1 - 200.0mm)
Module – R Tester
Metallurgical Microscope (X 1500)
Zoom Stereo Microscope (X 45) |
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CHEMICAL/PROCESS CONTROL
Emission spectrometer for steel (19
Channel)
Emission spectrometer for steel (24
Channel)
Emission spectrometer for zinc
(8channel)
Atomic absorption spectrophotometer
Carbon- Sulphur analyzer
Oxygen- Nitrogen analyzer
Hydrogen analyser
Infrared optical pyrometer
(400-1600 deg C)
Surface roughness tester |
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| Hot Rolled Product Process Control & Inspection |
Raw Material
- Scrap - Inspected at source by third party
- Check Analysis /Supplier Test Certificate
- DRI - Internally tested (Sample checked)
- Ferro Alloys Supplier Test Certificate. Samples checked [all lots random basis]
- Limestone / Lime Sample checked, analysed regularly
- Other additions - sample checked
SMS
- EAF /Ladle Sample
Batch Chemistry [Checked for all heats]
Temperature and oxygen level
Ladle Sample 4-6 samples at intervals
Chemistry
Temperature of liquid steel
- Tundish Sample
Chemistry (Elements and Gases)
Temperature
Slab Quality
- Dimensional check
- Surface Quality – visual
- Reconditioning by manual scarfing
- Random slabs checked by QA based on steel grade & quality
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HRM
- Reheating Temperature
- Rolling Temperature
- Coiling Temperature
- Coil- Gauge, Profile , Width
- Visual inspection for HR coil
Laboratory Testing
- Physical & mechanical testing
- Frequency of test – As per requirement of relevant specifications and agreed technical delivery conditions (TDC)
- Normally the tests are Yield Strength, Tensile Strength, percentage elongation,
- Bend test, Charpy impact test, Sheet metal ductility test, Hardness test, Microstructure
- Third party inspection, if required
HR Sheets/ Coils/Plates
- Visual Inspection
- Dimension
- Mechanical Test
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| Process Control in CRM Complex |
Pickling
- Acid Temperature
- Acid Concentration
- Iron Concentration in acid bath.
Cold Rolling
- Roll Coolant parameters
- Coil Surface
- Coil Dimension
Galvanizing
- Furnace temperature
- Zinc bath chemistry
- Chromic acid parameters
- Visual inspection of coil/sheet
- Dimension of Coil/Sheet
- Mechanical properties of coil/sheet
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| Inspection in CRM Complex (SGS & Internal) |
| Stage |
Parameter Measured |
Acceptance Critetria |
| HR Pickling |
Visual inspection for Visual Defects |
Reasonably free from all defects |
| Cold Rolling |
Physical inspection Dimensions
Visual inspection for Visual Defects |
Reasonably free from all defects |
| CR Trimming |
Physical inspection |
Width |
| Raw Material Hi Grade Zinc, |
Chemical Characteristics |
Zn = 99.95 % Min. |
| Zinc Bath Chemistry |
Chemical Characteristics |
Different criteria for Normal spangle & Mini Spangle |
| Continuous Galvanizing |
Physical inspection
1]Zn coating,
2]Zn Adherence
3]Mech Prop.
4] hardness
5] Visual inspection for Visual Defects
6] Dimensional Characteristics
7] Anti Fluting Test |
As per specification / TDC
As per specification / TDC
As per specification / TDC
As per specification / TDC
As per specification / TDC
As per specification / TDC
As per TDC |
| a) Coil |
| b) GP Sheet |
| c) GC Sheet |
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