FEATURE ADVANCED MATERIALS & PROCESSES | SEPTEMBER 2025 64 Industrial & Laboratory Furnaces, Ovens & Heaters • Batch or Continuous Processing • Durable Construction • Standard or Fully Customizable • Up to 1800ºC, 3272ºF • Single or Multi-Zone • PLC Controls Available • Made in the USA Since 1971 COME SEE US Heat Treat 2025 Show Oct. 21-23 in Detroit, MI Booth 1504 TC AM&P Ad 1:2pg 082125.indd 1 8/22/25 9:43 AM The low strength grades (Grades 1 and 2) are used in applications where fatigue strength and toughness are important while the higher strength grades are employed in applications where high strength and wear resistance with some toughness is needed. ADI components can be found in the automotive, heavy truck, agriculture, construction, railroad, and mining industries. SUMMARY Both marquenching and austempering offer heat treatment solutions for steel that minimize distortion and quench cracking versus a conventional quench and temper process. When a property combination of high hardness (>40 HRC) with high toughness is desired, austempering is the preferred solution. Similarly, ADI elevates the property envelope for conventional ductile iron, offering different property combinations of high strength and wear resistance with good toughness. ~HTPro For more information: Kathy Hayrynen, vice president of research and development, Aalberts surface technologies, 12238 Newburgh Rd., Livonia, MI 48150, 734.744.9939, kathy.hayrynen@aalberts-st.us, aalberts-ht.us. References 1. L. Canale, J. Vatavuk, and G. Totten, Martempering of Steels, ASM Handbook, Vol 4A, Steel Heat Treating Fundamentals and Processes, p 361-381, 2013, doi.org/ 10.31399/asm.hb.v04a.9781627081658. 2. J. Keough, Austempered Steel, ASM Handbook, Vol 4A, Steel Heat Treating Fundamentals and Processes, p 352360, 2013, doi.org/10.31399/asm.hb.v04a.9781627081658. 3. J. Tartaglia and K. Hayrynen, A Comparison of Fatigue Properties of Austempered Versus Quenched and Tempered 4340 Steel, Journal of Materials Engineering and Performance, 21, p 1-17, 2012, doi.org/10.1007/ s11665-011-9951-y. 4. K. Hayrynen, Heat Treating and Properties of Ductile Iron, ASM Handbook, Vol 4D, Heat Treating of Irons and Steels, p 508-521, 2014, doi.org/10.31399/asm. hb.v04d.9781627081689. 5. ASTM A897/897M-22 Standard Specification for Austempered Ductile Iron Castings, ASTM International, 2022, doi.org/10.1520/A0897_A0897M-22. 10
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