Second-source steel shot approval after batch variation
Approve a second steel-shot source against retained samples and the same particle-size specification used to assess the existing material. We can review a cast-shot proposal with you. The comparison needs consistent sampling, sieve evidence and trial conditions, so a change of supplier does not hide the original source of variation.
Record the affected batches first
Collect the batch identifiers, receiving records and retained shot from deliveries that behaved differently. Describe the affected cleaning or preparation process. Keep observations of machine settings and operating mix alongside the material record, rather than assuming every change in surface result came from new shot.
Freeze a common grading specification
State the agreed shot designation, sieve basis and acceptance limits. Use the same sampling and test method for both sources. A nominal grade printed on two bags does not demonstrate matching distributions, particularly if the reports use different procedures or describe unrelated sample lots.
Read batch records as comparable evidence
Ask for the actual sieve results available for the proposed lot and establish their sample identity. Record units, test basis and inspection date. Treat missing information as a request for clarification, not as a passing result. A general product sheet serves a different role from a batch-specific record.
Keep other media properties in view
Particle-size variation is the trigger for this purchase, but material and particle form still need confirmation. Identify the actual cast-shot proposal and required supporting evidence. Do not approve an unrelated media family simply because its nominal size label looks close to the current specification.
Run a controlled second-source trial
Agree the trial quantity and operating conditions with your process team. Identify the candidate lot and record any media additions or machine adjustments. Compare the result with the retained baseline. Changing both media and major settings without recording them makes the supplier comparison difficult to interpret.
Confirm the proposed batch support
Qingdao Relia Industries Co., Ltd. focuses on steel wire and steel shot manufacturing. For this enquiry, ask us to confirm the exact proposed shot, its production responsibility and available batch evidence. A statement about consistency should be supported by the records and trial agreed for your requirement.
Preserve samples and package identity
Keep the sealed approved shot sample, lot label and trial result together. Agree how delivery packs and the packing list identify the same material. On the first repeat shipment, inspect package condition and compare the lot documents before releasing the shot for routine replenishment.
Review variation through the same method
If the next batch differs, retain an identified sample and repeat the agreed comparison. Record process changes at the same time. This creates a useful investigation trail and avoids redefining the particle-size acceptance each time a production result changes or a new delivery arrives.
Send the batch-comparison brief
Share the current shot specification, affected batch records, retained-sample information and trial conditions. Add the required sieve evidence, initial quantity, recurring demand and destination. We can review the cast-shot proposal and confirm sample, documentation, packing and commercial scope for your second-source evaluation.
