ASM Standards  |  CQI-9 Qualification In Progress

Strength Forged Through Heat Treatment

Expert metal heat treatment services in Chennai — hardening, carburizing, annealing and more, backed by decades of metallurgical mastery.

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0+ Years of Team Expertise
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0kg Rotary Furnace
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Heat treatment process in action at Ambattur Steel Heat Treaters facility
Est. June 2025 — Ambattur, Chennai
55+ Years of Team
Experience
Who We Are

Trusted Partner in Metal
Heat Treatment Excellence

Ambattur Steel Heat Treaters is a professionally managed partnership firm established with the vision of providing specialized Metal Heat Treatment Solutions to industries across automotive, engineering, manufacturing, and allied sectors.

With decades of collective expertise, our firm is committed to quality, precision, and reliability in every process we undertake. We serve as a trusted partner for industries requiring advanced heat treatment processes that enhance the strength, durability, and performance of metal components.

Quality First ISO-standardized processes
On-Time Delivery Committed timelines
Zero Defect Rigorous quality checks
Advanced Tech Modern furnace systems

Our Vision

To be a leading and trusted partner in the field of metal heat treatment by delivering world-class services with integrity and innovation.

Our Mission

To continuously improve our processes, adopt modern technologies, and ensure customer satisfaction through precision, commitment, and timely service.

What We Do

Heat Treatment Processes

Comprehensive metallurgical heat treatment services engineered for precision and performance across diverse industrial applications.

Annealing heat treatment process

Annealing

Softening of metals through controlled heating and slow cooling to relieve internal stresses and improve machinability and ductility.

Stress Relief Softening
Normalizing heat treatment process

Normalizing

Heating above critical temperature followed by air cooling to achieve uniform microstructure and improve mechanical properties of steel.

Grain Refinement Uniformity
Hardening and tempering heat treatment process

Hardening & Tempering

Increasing surface hardness through controlled quenching followed by tempering to achieve optimal balance of hardness and toughness.

Surface Hardness Toughness
Gas carburizing heat treatment process

Gas Carburizing

Carbon enrichment of the surface layer through gas atmosphere at elevated temperatures, providing a hard wear-resistant case with a tough core.

Case Depth Wear Resistance
Carbonitriding heat treatment process

Carbonitriding

Simultaneous diffusion of both carbon and nitrogen into steel surfaces, producing a case with improved hardness, wear and corrosion resistance.

Dual Diffusion Corrosion Guard
Case hardening heat treatment process

Case Hardening

Creating a hard outer shell on components while keeping a tough, ductile core — ideal for gears, shafts, and high-wear components.

Surface Strength Core Toughness
Stress relieving heat treatment process

Stress Relieving

Reducing internal residual stresses in metal components after welding, forming, or machining without significantly affecting other properties.

Post-Weld Dimensional Stability
Industries We Serve
Automotive
Engineering
Manufacturing
Aerospace
Defence
Heavy Engineering
Tool & Die
Precision Parts
Forging
Pump & Valves
Automotive
Engineering
Manufacturing
Aerospace
Defence
Heavy Engineering
Tool & Die
Precision Parts
Forging
Pump & Valves
Infrastructure

World-Class Facilities

Our 4,000 sq.ft. state-of-the-art facility is equipped with advanced furnaces, metallurgical testing equipment, and a fully-equipped in-house laboratory.

4,000
Sq. Ft.
State-of-the-Art Production Facility
  • Office, Factory & Lab Testing Combined
  • Safety & Environment-Compliant Operations
  • Bulk & Custom Order Handling Capacity
  • Precise Temperature Control Systems

Gas Carburising Furnace

600 KG Capacity

Rotary Furnace

70 KG Capacity

Pre-Heating & Tempering Furnace

100–700°C Range

Rockwell Hardness Testing

Analog & Digital

Micro Vickers Hardness Tester

Precision Measurement

Metallurgical Lab — Microscope & Image Analyser

Full Microstructure Analysis

Brinell Hardness Tester

HBW Scale · Load Testing
Metallurgical Inspection Set Up

In-house sample preparation & analysis workflow for complete microstructural validation

01
Metallurgical Inverted Microscope
Microscope

Inverted metallurgical microscope for microstructure examination and grain analysis

02
Micro Vickers Hardness Tester
Micro Vickers

Diamond pyramid indenter for hardness measurement and case depth analysis

03
Precision Sample Cutting Machine
Cutting

Precision abrasive cutting for clean cross-sectional sample preparation

04
Belt and Surface Polishing Machine
Belt Polish

Belt and surface polishing to achieve flat, scratch-free finish for etching

05
METCO Bahnmount Resin Molding Machine
Molding

METCO Bahnmount automatic resin mounting for stable edge-retaining sample preparation

06
METCO Micro Polishing Machine
Micro Polish

METCO twin-disc fine polishing with diamond suspension for mirror-finish surface before examination

Our Equipment

A look inside our 4,000 sq.ft. production facility

Rotary Furnace at ASHT facility
Rotary Furnace 70 KG Capacity
Gas Carburizing Furnace at ASHT facility
Gas Carburizing Furnace 600 KG Capacity
Quenching Machine at ASHT facility
Quenching Machine Oil & Water Quench
VFC Machine at ASHT facility
VFC Machine Vertical Furnace
Testing & Validation Equipment

In-house hardness testing instruments for complete post-process validation

Micro Vickers Hardness Tester

Micro Vickers Hardness Tester

High-precision diamond indenter for measuring hardness of thin sections, coatings and case-hardened layers at microscopic scale.

HV Scale · Precision Measurement
Rockwell Hardness Tester Digital

Rockwell Hardness Tester — Digital

Digital readout Rockwell tester for fast, accurate hardness verification across HRC, HRB and HRA scales on heat-treated components.

HRC / HRB / HRA · Digital Readout
Rockwell Hardness Tester Analog

Rockwell Hardness Tester — Analog

Dial-gauge Rockwell tester providing reliable hardness readings for routine production quality checks and batch validation.

HRC / HRB · Dial Gauge
Our Standards

Uncompromising Quality

Every component that passes through our facility undergoes rigorous quality control aligned with international metallurgical standards.

01

ISO-Standardized Processes

We follow ISO-standardized processes and adopt stringent quality control measures at every stage of heat treatment.

02

CQI-9 Qualification In Progress

Actively pursuing AIAG CQI-9 Special Process Assessment qualification — process validation and documentation underway.

03

ASM Metallurgical Standards

All processes adhere to American Society for Metals (ASM) standards, ensuring globally recognized metallurgical compliance.

04

Meticulous Hardness Testing

Comprehensive hardness verification using Rockwell (analog & digital) and Micro Vickers methods for complete traceability.

05

Uniform Heating & Cooling Cycles

Precisely controlled heating and cooling cycles maintained with advanced temperature monitoring systems throughout every batch.

06

SPC & Standardization

Statistical Process Control (SPC) applied across all critical heat treatment parameters to ensure consistent, repeatable outcomes.

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Customer Satisfaction is the foundation of everything we do — from the first heat cycle to the final inspection.

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Leadership

The Experts Behind ASHT

Our partners bring over 55 years of combined hands-on experience in metal heat treatment, metallurgy, and industrial operations.

KR

Mr. K. Rajiv

Managing Partner
22+ Years of Experience

Previously Supervisor at Ambattur Heat Treaters, now spearheading operations and strategy at ASHT with deep domain expertise.

PD

Mr. Palani D.I

Partner — Metallurgy
18+ Years of Experience

Served as Metallist at Ambattur Heat Treaters with extensive knowledge in metallurgical testing and process control.

RE

Mr. Rajini E

Partner — Operations
15+ Years of Experience

Specializes in rotary machine supervision with proven expertise in operational excellence and production efficiency.

Roadmap

Building the Future

Ambattur Steel Heat Treaters is actively investing in expansion, technology, and capability to serve a wider industrial base.

  • Expansion with additional 500kg furnaces in a new Ambattur plant
  • Addition of Rotary Furnace (100 KG) at new facility
  • Installation of Shot Peening Machine
  • SCADA system implementation for real-time process tracking
  • Expanding to Aerospace, Defence & Heavy Engineering sectors
ASHT 2025 →
Get In Touch

Contact Us

Ready to discuss your heat treatment requirements? Reach out to our team and we'll get back to you promptly.

Ambattur Steel Heat Treaters

Precision Heat Treatment Solutions — Chennai, India

Registered Address No. 9A, Developed Plot, SIDCO Industrial Estate,
Ambattur, Chennai – 600 098,
Tamil Nadu, India.
GST Number 33ACLFA0133F1Z0
No. 9A, SIDCO Industrial Estate, Ambattur, Chennai 600098