Company Profile

About Our New Branch

We, Super Heat Treatment Plant have recently opened an additional branch at Howrah to meet the growing need of heat treatment service in the Howrah industrial area.

Response from local industries is very encouraging already.

Commissioned in 2014, our Howrah plant is expected to become a full fledged heat treatment service centre - like our Lake Town and Doltala units - in a short period of time.

About Our Sister Concerns

We have two sister concerns under the same management which support our plant in various activities.

Tool Tech Industries

Tool Tech Industries is an engineering unit engaged in the manufacturing of tools, dies, HSS cutters and chasers, metal segmental saws, rolls, leather cutting knives and various other Components against specific requirements.

We tap the technical resources of TTI for fabrication of our furnace shells, tailor-made insulated cages, jigs and fixtures etc.

SAS Engineering 

SAS Engineering is a sand-blasting service unit. Materials heat treated at our plant are sand blasted here as per specific order or necessity. Sand blasting makes the components free from dirt, scale and contamination to give them a clean finish. This is particularly required for threaded tools and many other engineering components where no post-heat treatment operations are prescribed in the drawing.

Our requirements apart, SAS take up many other sand blasting jobs also on their own commercial terms.

Our Services

  • General Heat Treatment Processes
    • Stress Relieving
    • Annealing (Full Annealing, Process Annealing, Isothermal Annealing)
    • Normalising
    • Spheroidising
    • Hardening (Water / Oil / Polymer Quenching)
    • Tempering
    • Austempering
    • Martempering
    • Flame Hardening
    • Solution Treatment
    • Precipitation Hardening (Natural / Artificial Ageing)
    • In-situ Stress Relieving (With Time-Temperature recorder Arrangements)
  • Special Heat Treatment Processes
    • Gas Carburizing
    • Nitriding (Liquid / Gas)
    • Induction Hardening
    • Cryogenic Cold Treatment

Gas Carburizing


  • Optimum combination of high wear resistance and surface hardness (over 60 Rc) with tough core
  • Control of carbon potential in the process to ensure proper case microstructure free from carbide network
  • Case/core refining treatment to achieve fine-grained structure throughout the mass
  • Improved endurance limit in fatigue

Case Depth:

  • 0 0.5-3 mm using conventional carburizing fluid
  • 0.1-0.5 mm using special carbonitriding fluid

Various engineering components demanding above-mentioned properties.

Nitriding (Liquid/Gas)


  • Niriding improves hardness and wear resistance on steel surface. Hardness achieved is 300-350 HV for carbon steels and 600-900 HV for alloy steels depending on grades and pre-nitriding heat treatment parameters. For special nitriding steels containing chromium, molybdenum, vanadium, aluminium etc. as alloying elements surfaces hardness becomes well above 900 HV after nitriding.
  • Nitriding is a no-quench surface hardening process. So along with high hardness this process ensures good dimensional stability also.
  • Nitriding is recommended as a finishing treatment after final grinding / machining etc.
  • Improved endurance limit in fatigue
  • Good atmospheric and aqueous corrosion resistance
  • Improved heat resistance : surface hardness is retained upto 500oC

Case Depth: From a few microns to 0.4 mm Applications: Automobile components, crankshafts, gears, hot working dies, plastic moulds, HSS cutting tools, gauges, valves, bushes, flanges, shafts etc.

Induction Hardening


  • Induction Hardening involves progressive heating of the component within suitably designed inductor coil generating alternating current of desired frequency - quick soaking and immediate quenching by pressure jets of water / polymer solution.
  • "Quick Heat - Quick Cool " method ensures very fine surface microstructure.
  • Alternating current through inductor coil generates electromagnetic field inducing eddy current on the surface area of the job. The skin current produces skin heating only which excludes the possibility of mass effect in quenching So induction-hardened jobs always achieve more hardness than volume hardened jobs, particularly for big masses. In volume - hardened jobs the surface hardness decreases by self-tempering due to evolution of enormous core-heat during martensitic transformation in quenching
  • Quick processing means minimum time of soaking at the elevated temperature. So no scale is formed on the work surface.
  • Improved endurance limit in fatigue.

Case Depth:

  • Up to 12 mm (Different ranges)
    • 0.8 - 2.2 mm with 450 Khz - machine
    • 1 - 3  mm with 30 Khz - machine
    • 2 - 5  mm with 10 Khz - machine
    • 4 - 8  mm with 3 Khz - machine
    • 8 - 12  mm with 1 Khz - machine

Automobile components, rolls, piston rods, gears, shafts, spindles etc.

Cryogenic Cold Treatment


  • Cryogenic cold treatment is a deep-freeze super-cold treatment at -300oF (-184oC) carried out on various tools, dies and plenty of other engineering components.
  • The treatment effects extraordinary improvement in performance. The service life of tools /components enhances by 100 - 400 % by this treatment.
  • Cryogenic cold treatment is a one-time Surface-to-core treatment and its effect is not removed by repeated regrindings. It works like a coating but lasts after re-sharpening/re- grinding.
  • The process causes complete transformation of retained austenite to martensite ensuring added strength.
  • Cryogenic cold treatment produces the most stable micro-structure in a metallic component, effecting extreme dimensional stability.
  • No thermal shock is involved in the process.
  • Cryogenic cold treatment also causes strengthening of molecular bond and fine metallurgical structure, effecting enhanced wear resistance, toughness and durability.


H.S.S. Cutting tools, gears, carbide tools, shear blades, pistons, knives, gauges, dies, moulds, blades, punches, rollers, bearings etc.

New Branch:

Super Heat Treatment Plant
Lakhanpur Industrial Area
Vill & PO - Tentulkuli 
PS - Domjur 
Dist - Howrah 
Pin 711409

Sister Concerns

Tool Tech Industries:
85, SK Deb Road 

SAS Engineering:
85, S.K Deb Road 
Kokata- 700048

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