Several key pieces of information on an angle steel label enable product traceability, a critical aspect of quality control and compliance:
Heat number: This is the most important traceability feature-a unique code assigned to each batch of steel during production. It links the angle steel to the specific melting and rolling process, allowing manufacturers and customers to access mill test reports (MTRs) that detail chemical composition, mechanical properties, and testing results. If a quality issue arises, the heat number helps identify all products from the same batch, enabling targeted recalls or inspections.
Manufacturer's plant code: A specific code identifying the exact production facility where the angle steel was made. This is useful if multiple plants of the same manufacturer produce angle steel, as it narrows down the production location and allows for more precise tracking of production processes and quality records.
Production date: The date when the angle steel was rolled or manufactured. This helps in tracking the age of the product, which is important for materials with shelf-life considerations (e.g., coated angle steel with limited corrosion protection warranty) and for investigating production trends over time.
Batch number: In addition to the heat number, a batch number may be included to group angle steel produced in the same shift or with the same set of production parameters. This provides an extra layer of traceability, especially for large batches split into multiple shipments.
Together, these details ensure that every piece of angle steel can be traced back to its origin, production process, and quality testing, meeting regulatory requirements and customer expectations for transparency.