Why QT matters
QT condition is requested when buyers need a controlled strength and toughness route for components such as shafts, rods, fasteners, and heavy machinery parts.
Technical Resource
What QT Condition Means in Alloy Steel Bars
QT means quenched and tempered. For alloy steel bars, QT language should always be connected to grade, size, target properties, order standard, and downstream use.
Buyer Guide
What to review before quotation.
Use this guide to prepare a clearer specification and reduce back-and-forth during RFQ review.
What not to assume
Do not assume a single universal property level from the letters QT alone. The required standard, diameter, heat-treatment route, and test scope should be stated clearly.
RFQ details to include
Send grade, equivalent standard, diameter, length, quantity, target condition, target mechanical properties if known, test items, certificate requirements, and destination.
Related Pages
Continue with the relevant product, application, and RFQ pages.
Open this page to connect the guide topic with product, processing, document, or RFQ details.
Open this page to connect the guide topic with product, processing, document, or RFQ details.
Open this page to connect the guide topic with product, processing, document, or RFQ details.
Open this page to connect the guide topic with product, processing, document, or RFQ details.
FAQ
Common buyer questions.
Does QT always mean the same strength?
No. QT condition must be tied to grade, size, order standard, and target mechanical properties.
Should I request mechanical testing?
For demanding applications, state the required test items and certificate format during RFQ review.
Can JOTAIN review QT requirements before quote?
Yes. Send the grade, size, condition target, application, and document requirements for review.
RFQ
Turn this guide into a clear RFQ.
Include delivery condition, processing requirement, destination port, testing requirements, and certificate expectations so the supply route can be reviewed clearly.