Commercial Steel Treating Corporation, ©2019
Printed on March 18, 2019 8:18 pm


Curtis Thermal Processing (CTP) was built in 2009 and is a wholly-owned heat treat facility of Commercial Steel Treating. CTP is located less than one mile from our Curtis Metal Finishing plant in Machesney Park Illinois.


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Statement of Limited Liability
MTI Statement of Limited Liability


Our Laboratory is staffed 24 Hours, Seven days per week with degreed Metallurgical Engineers. We are registered to ISO9001:2015 and A2LA Laboratory Accreditation.

Laboratory Capabilities Include:

  • Wet Cutoff Machines
  • Sample Mounting Units
  • Rough and Fine Polishing Equipment
  • Metallurgical Microscope (1000x)
  • Hardness Testing Equipment (Standard Superficial & Micro Hardness)
  • Fastener Tensile Testing Equipment

Accredited Hardness Testing Methods

  • Hardness Rockwell (B, C, N) - ASTM E18
  • Fastener (internal / external threads) - ASTM F606, F606M (sections 3.1, 4.1, 5.2, 6.1)
  • File Hard - SAEJ864
  • Micro hardness (Knoop) - ASTM E384
  • Tensile & Axial & wedge - ASTM F606, F606M (sections 3.4 & 3.5)

Metallographic Evaluation

  • Preparation - ASTM E3, SAE J423
  • Carburization/decarburization - GM 6104M, SAE J121, J423 (section 6.3)
  • Microstructure/case depth - GM 6104M, SAE J121, J419, J423.