Stainless Steel Heat Number
What is Heat Number?
A heat number is a unique code assigned to a stainless steel melt during a single production process. It serves as an identification number that links the final product to its original melt, ensuring full traceability of chemical composition, mechanical properties, and test results from manufacturing to inspection.
Importance of Heat Number in Stainless Steel
The heat number plays a key role in stainless steel traceability and quality control throughout manufacturing.
Its Importance:
- Product tracking: Every product can be traced back to its original melt or heat code.
- Quality verification: Confirms compliance with test results and material composition data.
- Certification reference: Appears on Mill Test Certificates (MTCs) for documentation.
- Manufacturing transparency: Ensures consistent quality and reliable sourcing.
What is the Heat Number in a Pipe?
The heat number in a pipe identifies the pipe’s production melt and links it to its Material Test Report (MTR) or inspection record.
It ensures:
- Full pipe traceability from manufacturing to testing.
- Compliance with material and quality standards.
- Verification of composition and material properties.
How to Identify Heat Number on Stainless Steel Products
The heat numbers are typically marked on stainless steel products by stamping, engraving, or printing code on the product or label.
Typical locations include:
- Pipes: Near one end of the pipe (engraved or printed).
- Sheets / Coils: Along the edge or tag attached to the product.
- Bars / Rods: Stamped directly on the surface or marked on attached labels.
- Packaging / Tags: When direct stamping isn’t possible, a batch label includes the heat number for tracking.