---
title: "Heat Treat Radio: Justin Rydzewski on CQI-9 Rev.4 (Part 1 of 4) – Pyrometry"
description: Heat Treat Radio host, Doug Glenn, begins a 4-part series with Justin Rydzewski about Revision 4 of CQI-9.
---

[Powering Performance | AIAG](https://blog.aiag.org)

# [Heat Treat Radio: Justin Rydzewski on CQI-9 Rev.4 (Part 1 of 4) – Pyrometry](https://blog.aiag.org/heat-treat-radio-justin-rydzewski-on-cqi-9-rev.4-part-1-of-4-pyrometry)

 Written by [Heat Treat Today](https://blog.aiag.org/author/heat-treat-today) | Dec 10, 2020 3:00:00 PM

Heat Treat Radio host, Doug Glenn, begins a 4-part series with Justin Rydzewski about Revision 4 of CQI-9. These two experts, who served on the revision committee, are full of interesting information and practical advice on how to understand and comply with CQI-9 Rev.4.

You can either listen to the podcast by clicking on the audio play button, or you can read an edited version of the transcript.

[**Click here to listen to podcast and view transcript. **](https://www.heattreattoday.com/media-category/heat-treat-radio/heat-treat-radio-justin-rydzewski-on-cqi-9part-1-of-4/)

[View full post](https://blog.aiag.org/heat-treat-radio-justin-rydzewski-on-cqi-9-rev.4-part-1-of-4-pyrometry)

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