Material Grade Verification
- XRF spot-check of critical components against drawing spec
- Mill test certificates traced to lot and validated against supplier register
- Heat-treatment records and hardness testing on production samples
Sector · Industrial Machinery
How to audit an industrial machinery factory in China.
Material grade verification, load-test audits, blueprint fidelity and weld evidence — for buyers who cannot afford a part to fail in the field.
Why this sector breaks differently
Machinery failures are metallurgical — not visual.
An industrial machinery supplier can deliver a part that looks identical to spec and fails at 60% of rated load because the steel grade was substituted, the heat treatment was skipped, or the weld was cosmetic.
Our forensic auditors run XRF spot-checks on critical components, validate heat-treatment records, and review weld procedures against the actual welder qualifications on file. We treat the metallurgy as the audit, not an annex.
If your buyer specification calls out a material grade, a tolerance, or a load class, we verify it on the floor — not in a follow-up email three weeks after the shipment arrives.
What we audit
Four forensic checks specific to industrial machinery.
Load-Testing & Mechanical Validation
- Witness load testing against published specification
- FAT (Factory Acceptance Test) protocol audited against contract
- Failure-mode review of prior shipments and warranty claims
Weld & Joining Quality
- Welder qualification records cross-checked against active operators
- WPS / PQR validated against AWS or EN ISO 15614 baseline
- NDT (UT, MT, PT) sampling on critical welds with auditor present
Blueprint & Tolerance Fidelity
- Random in-process sampling against drawing tolerances
- Calibration certificates on critical measuring equipment
- Reverse-engineering check on complex geometries
Free download
The 2026 Industrial Machinery Audit Checklist.
The same 25-point pre-shipment checklist our auditors use on machinery, fabricated metal and assembly suppliers across the Yangtze River Delta.