Steel

About Us

The Galwalia Ispat Udyog Private Limited (GIUPL), established in 2005, is an iconic Steel Manufacturing Company in the country. GIUPL is a strong contributor towards the country’s ‘Make in India’ effort aimed at making our nation self reliant in manufacturing. Built on ethos and legacy of excellence in what it produces, Galwalia Ispat Udyog Private Limited has a modern & technologically up-to-date manufacturing facility at Kashipur, producing the highest quality TMT bars under the brand name SPNG Group.

WHY INDOSTAR 550D TMT BARS ?

D-grade steel is more frequently utilised in earthquake-prone locations because of how robust it is to seismic activities. According to IS 1786, Fe 550D complies with the chemical requirements with low Carbon, Sulphur, and Phosphorus that enable TMT to gain more ductility that helps the steel to be preserved and resistant to seismic shocks.
TMT manufacturing process results in a steel product with a solid outer shield that gives the TMT steel bar the requisite strength and a soft inner core that gives it the necessary flexibility to survive the destruction caused by an earthquake’s earth-shaking activity.

Chemical Properties

Elements IS 1786:2008 AMEND.NO.
4 Fe 550D
INDOSTAR Fe 550D LEADING BRAND
% C (Max) 0.25 0.24 0.25
% S (Max) 0.04 0.03 0.035
% P (Max) 0.04 0.03 0.035
% (S+P) (Max) 0.075 0.065 0.070
CE (Max) 0.42 0.35 0.42

Mechanical Properties

Product Attributes IS 1786:2008 AMEND.
NO. 4 Fe 550D
INDOSTAR Fe 550D LEADING BRAND
YS (Min) Mpa 550 590 580
UTS (Min) Mpa 600 660 640
(UTS/YS (Min) 1.08 1.11 1.10
%티 (Min) 14.5 20.0 19
% Total El (Min) 5 9 9

Chemical Properties

Elements

IS 1786:2008 AMEND.NO.

4 Fe 550D

INDOSTAR Fe 550DLEADING BRAND
% C (Max)0.250.240.25
% S (Max)0.040.030.035
% P (Max)0.040.030.035
% (S+P) (Max)0.0750.0650.070
CE (Max)0.420.350.42

Mechanical Properties

Product AttributesIS 1786:2008 AMEND.
NO. 4 Fe 550D
INDOSTAR Fe 550DLEADING BRAND
YS (Min) Mpa550590580
UTS (Min) Mpa600660640
(UTS/YS (Min)1.081.111.1
%티 (Min)14.51816
% Total El (Min)586

Chemical Properties

Elements

IS 1786:2008 AMEND.NO.

4 Fe 550D

INDOSTAR Fe 550DLEADING BRAND
% C (Max)0.250.240.25
% S (Max)0.040.030.035
% P (Max)0.040.030.035
% (S+P) (Max)0.0750.0650.070
CE (Max)0.420.350.42

Mechanical Properties

Product AttributesIS 1786:2008 AMEND.
NO. 4 Fe 550D
INDOSTAR Fe 550DLEADING BRAND
YS (Min) Mpa550590580
UTS (Min) Mpa600660640
(UTS/YS (Min)1.081.111.1
%티 (Min)14.51816
% Total El (Min)586

Product Range of Steel

BIS StandardGradeSize
IS 1786:2008Fe6008mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe5508mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe500D8mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe5008mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe415D8mm,10mm,12mm,16mm,20mm,25mm,32mm
E2508mm,10mm,12mm,16mm,20mm,25mm,32mm
IS 2062 : 2011E250 AAngle
Channels
Beam
Square
Round

Product Range of Steel

BIS Standard Grade Size
IS 1786:2008 Fe600 8mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe550D 8mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe550 8mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe500D 8mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe500 8mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe415D 8mm,10mm,12mm,16mm,20mm,25mm,32mm
Fe415 8mm,10mm,12mm,16mm,20mm,25mm,32mm
IS 2062 : 2011 E250 A Angle
Channels
Beam
Square
Round
Detail
*Value Meets the requirement of IS1786:2008 Amnd No.4 however the actual result will have improved values which will be reflected in MTC.

The production process

This is a process that is divided into four stages. Here’s a closer look:

Stage 1
01. SMS (Steel Melting Shop)

The raw materials which are used for making steel are sponge iron, Ferro-Silico-Manganese& deoxidizer. Sponge iron is made by directly reducing the iron ore in the form of lumps, pellets and fines. Sponge iron and recyclable grade steel scrap are charged in appropriate ratio into the induction furnaces in batches.

After the complete melting of charge, the hot liquid metal samples are taken out to analyses the chemical composition i.e. carbon, sulphur, phosphorus, silicon, manganese, etc. In order to balance the chemistry of the metal as per the required grade, silico-manganese and ferro-silicon are added. The temperature of liquid metal is raised up to 1650 degree centigrade for Tapping.


For billet casting, liquid steel is poured into the ladle and the ladle is taken to CCM for billet casting.

Complete Process route for SMS Section
Charging | Melting | Removal of slag |Adding of Deoxidizer & Alloys|Tapping

Stage 2
02. CCM (CONTINOUS CASTING MACHINE)

We have (9X16) Concast India CCM, that ensure stable metallurgical property of billets at high speed. During casting, we control the operation in such a way the steel Re-oxidation does not take place.

Stage 3
03. Rolling Mill

After  casting of billets in required sizes, they are directly send to the rolling mill through high speed conveyors at temperature (1000 to 950)degree centigrade. Induction heaters are also use to maintain the temperature.

  • We have (1+16’’) stand fully automatic straight rolling mill .we are using HSS Rolls which are being prepared through CNC machine this give smooth physical appearance of our Rebar.

ROLLING PROCESS:-The thoroughly tested billets are hot charged with specified temperature. Billets are rolled by roughing mill and then pass through continuous mill stands which progressively reduce the size of billets in the desired Rebar size. The gradual reduction is an important factor to ensure finer grain structure of the bar.

QUENCHING and NORMALISING PROCESS: The bar after leaving the final rolling stand is fed to a quenching box at a very high speed. In this section, rapid and controlled water quenching is performed by reducing the temperature of the surface drastically from 900 to 420 degree centigrade. Due to higher speed, only the outer portion gets quenched but the inner core remains hot. The outer case due to rapid quenching gets converted into martensitic form. The microstructure is fine grains ferrite and pearlite at the core and martensitic at case. The bar is received on automatic cooling bed, where self tempering process take place and we get tempered martensitic and fine grains  ferrite-pearlite microstructure at core .Due to this the rebar’s are high strength & high ductile.

*To control the quenching process we are using chemically treated soft water.

Stage 4
04. Quality Assurances

During the process of steel making we carry out necessary quality check at different stages of steel manufacturing to ensure the good quality of final product.

  • All Input raw materials are tested in our chemical laboratory to ensure their quality.
  • During the melting process, we take sample of liquid metal & check under Spectrophotometer for chemical composition like C,Mn,Si,S,P,etc and by adding alloys we control the final chemical composition of liquid steel.
  • During billet casting, we control the Billet speed, water flow & billet Temperature to get optimum quality of Billet.
  • During rolling, our Material Passes through Thermo Mechanical Treatment box (designed on TEMPCORE technology). Where the input & output temperature is controlled between 900 to 420 degree centigrade to get desire strength & ductility of our TMT Rebar by controlling the input water temperature, pressure, flow and quality.
  • The finished TMT Rebar handle through automatic rake type cooling bed. Sizing & bundling operation is done through Cold shear & bundling
  • On Cooling bed, samples are drawn at regular interval by the QUALITY ASSURANCE TEAM to ensure physical property (Per meter weight, Rib Area) & Mechanical property (yield strength, tensile strength, elongation )
  • All the mechanical tests are carried out by computerized control UTM machine.
  • The finished TMT rebar analyzed to ensure that it confirms BIS standards IS 1786:2008 for grade Fe550, Fe550D& Fe600.
  • We also carried out Bend & Re-bend testing of Rebar as per IS: 1786.
  • We have NABL approved quality laboratory.

During the process of steel making we carry out necessary quality check at different stages of steel manufacturing to ensure the good quality of final product.

  • All Input raw materials are tested in our chemical laboratory to ensure their quality.
  • During the melting process, we take sample of liquid metal & check under Spectrophotometer for chemical composition like C,Mn,Si,S,P,etc and by adding alloys we control the final chemical composition of liquid steel.
  • During billet casting, we control the Billet speed, water flow & billet Temperature to get optimum quality of Billet.
  • During rolling, our Material Passes through Thermo Mechanical Treatment box (designed on TEMPCORE technology). Where the input & output temperature is controlled between 900 to 420 degree centigrade to get desire strength & ductility of our TMT Rebar by controlling the input water temperature, pressure, flow and quality.
  • The finished TMT Rebar handle through automatic rake type cooling bed. Sizing & bundling operation is done through Cold shear & bundling
  • On Cooling bed, samples are drawn at regular interval by the QUALITY ASSURANCE TEAM to ensure physical property (Per meter weight, Rib Area) & Mechanical property (yield strength, tensile strength, elongation )
  • All the mechanical tests are carried out by computerized control UTM machine.
  • The finished TMT rebar analyzed to ensure that it confirms BIS standards IS 1786:2008 for grade Fe550, Fe550D& Fe600.
  • We also carried out Bend & Re-bend testing of Rebar as per IS: 1786.
  • We have NABL approved quality laboratory.

Commitment

At SPNG, we are committed to provide the highest level of quality of TMT Rebar – “INDOSTAR HD Fe 550D”. Our each Rebar is physically and chemically tested and we provide test reports to ensure 100% customer satisfaction with every dispatch.

We are one of the leading Quality TMT manufacturing companies of India with latest technologies and provide best quality TMT Rebar at affordable prices.

We are committed to provide consistent quality products that fulfilled customer expectations & accomplish their profitable and sustainable growth with our commitment towards social and environmental values.

SPNG is committed to practice highest standards of corporate culture and contribute towards India’s economic growth along with the environmental balance.

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