Heat Treating Services for Industrial Metal Components
Expert Heat Treatment Solutions to Maximise Durability and Performance
At Isothermal (Pty) Ltd, we specialise in professional heat treating services engineered to strengthen, toughen, and extend the service life of critical metal components. With over four decades serving manufacturers and engineers across South Africa, our precision heat treatment processes ensure your parts perform under demanding conditions.
What Is Heat Treating?
Heat treating is a controlled heating and cooling process that alters the physical and mechanical properties of metals without changing their chemical composition. These processes enhance strength, hardness and wear resistance — making parts more reliable in demanding applications.
Our team applies industry-proven techniques to tailor material properties for your specific application, from high-stress shafts and gears to precision tooling.
Our Precision Heat Treatment Processes
Induction Hardening
Induction hardening uses electromagnetic energy to rapidly heat selected areas of a component before quenching. This creates a tough core with a hardened, wear-resistant surface — ideal for parts subjected to friction and repeated loading such as gears, shafts and axles.
Flame Hardening
Flame hardening uses a controlled flame to heat and then quench metal surfaces to increase wear resistance. It’s effective for medium carbon and alloy steels where surface toughness is critical.
Annealing and Stress Relief
Annealing and stress-relief processes modify internal stresses and improve material ductility, making parts easier to machine and less prone to cracking. These thermal cycles are carefully controlled for repeatable, reliable outcomes.
The Isothermal Advantage
Decades of Industry Expertise
Isothermal has provided heat treatment services since 1979, evolving from flame hardening to advanced induction technologies. Our experienced technicians ensure consistent results on every job specification.
Tailored Heat Treatment for Diverse Needs
We work with low, medium and high frequency induction machines, allowing us to customise cycles to component size, material and performance requirement. Our services suit a wide range of sectors including manufacturing, automotive, mining and engineering.
Quality You Can Depend On
From initial consultation to final delivery, we focus on precision, reliability and quick turnaround to help keep your production timelines on track. Our commitment to quality has made us a trusted partner in industrial heat treating.
Applications of Our Heat Treating Services
Our heat treatment solutions support components in:
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Automotive driveline and suspension parts
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Industrial shafts and rollers
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Tooling and die steels
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Cam lobes, axles and pins
Each service is selected to improve performance, wear resistance and fatigue strength in service-critical parts.
Ready to Improve Your Component Performance?
Increase durability, strength, and service life of your metal parts with professional heat treating from Isothermal. Whether you’re working with shafts, gears, tooling or specialised components, our experienced team delivers precision heat treatment tailored to your requirements.