ENTITY RELATIONSHIP DIAGRAM
STEEL MAKING PROCESS
Presented By:
Gaurav Gupta - 33
Gitesh Agarwal - 35

Steel Making Process
Raw Materials : Iron Ore, Coal, Limestone, Manganese Ore
Major Processes:
 Coke Oven : Coal  Coke
 Blast Furnace : Raw Materials  Hot Metal
 LD Converter : Hot Metal  Crude Steel
 Secondary Refining : Crude Steel  Finished Steel
 Casting : Liquid Steel Slabs, Plates, Ingots
 Rolling Mills : Slabs  Coils, Structural etc.

Lime stone Iron ore
SINTER PLANT
Coal
COKE OVENS
BLAST FURNACE
PIG CASTING M/C PIG IRON
BOF
INGOT
CC Slabs
Rolled Slab
SLABBING MILL
HR CF HR plates/Sheet
HR Coils for sale
HOT STRIP MILL
ANNEALING LINES
CRM
CR COILS/SHEET
PICKLING LINES
GPGC GALVANALISING LINES
TMBP COILS

Entities and their attributes
Vendor
vendor IN(PK)
vendor Name
vendor Addr.
vendor Class
supplies
rate
/amount

Entities and their attributes
Raw Materials
Coal Iron Ore Limestone
lot Number (PK) lot Number (PK) lot Number (PK)
vendor Details vendor Details vendor Details
date date date
quantity quantity quantity
composition composition composition

Entities and their attributes
Finished Steel
heat Number (PK)
composition
weight
grade

Entities and their attributes
Products
Slabs Bars Coils
lot No (PK) lot No (PK) lot No (PK)
heat Number heat Number heat Number
no Of Slabs grade grade
weight weight weight
dimensions dimensions dimensions
grade coating Details

Entities and their attributes
Customer
Customer IN(PK)
customer Name
customer Addr.
customer Status
quantity Ordered
price
/amount

Relationship between Entities
“ A vendor can supply many raw materials”
“ A raw material can be supplied by many vendors”
“ Raw material of different lot number can produce finished
steel of single heat number”
“ A single finished steel can be casted into many slabs/ bars/
coils”
“ A single slab/ bar/ coil can be casted only from one single
finished steel”
“ A single customer can purchase many slabs/ bars/ coils”
“ A single slab/ coil/ bar can be purchased by only one
customer”

Entity Relationship Diagram
Coal
1..*
1..* 1..*
Vendor Supplies Limestone
1..* Iron Ore

Entity Relationship Diagram
Coal
1..*
1..* 1..1
Limestone Produces Finished Steel
Iron Ore 1..*

Entity Relationship Diagram
Slab
0..*
1..1 0..*
Finished Steel produces Bars
0..* Coils

Entity Relationship Diagram
Slabs
0..*
0..* Shipped 1..1
Bars Customer
to
Coils 0..*

Final Entity Relationship Diagram
Vendor 1..* 1..* Raw Material
supplies
Vendor IN (PK) lot Number (PK)
1..*
Finished Steel 1..1
produces
Heat Number (PK)
Customers
Customer IN (PK)
1..1
0..* Products 1..1
produces 0..*
Lot number (PK) shipped