How to Verify a Stainless Steel Supplier: 7 Checks
Verify a supplier by checking the mill certificate and heat number traceability, requesting third-party inspection (SGS/BV), confirming the production route and factory, comparing the chemistry to the claimed grade, and testing a trial order before scaling. A low price with no traceable certificate is the most common red flag.
Chemical composition versus claim
A "304" certificate showing low nickel or no molybdenum is a warning; compare against the standard.
Documents to keep
MTC, packing list, inspection reports, photos, and shipment records.
Warning signs
no certificate, certificate without heat number, price far below market, refusal of third-party inspection, unclear mill source.
Frequently Asked Questions
- Is a mill certificate sufficient?
- It is necessary but not sufficient; check heat traceability and consider third-party inspection for high-value orders.
- How much does SGS inspection cost?
- It depends on scope and location; ask for a quote per shipment before ordering.
- Can I audit the factory remotely?
- Yes, a live video walkthrough of the warehouse, processing lines, and packing is a practical first step.
More guides
Request our certificate pack and a trial order quotation.