Quality Control Before Quotation
Review drawings, sample conditions, material, tolerance, and application before pricing.
Quality Control
Quality Control for Drawing-Based OEM Metal Parts
Quality control starts before quotation and continues through material review, process confirmation, production, inspection, packing, and shipment readiness.
Quality Control System
Practical checkpoints for custom castings and machined parts.
Drawing and Specification Review
Check key dimensions, fit requirements, surface notes, and functional requirements.
Material and Process Confirmation
Confirm material grade, casting route, machining plan, treatment, and inspection items.
Dimensional Inspection
Check critical dimensions and drawing requirements before shipment.
Surface Treatment Review
Review finish, protection, packing impact, and project requirements.
Packing and Final Shipment Check
Confirm packing and shipment readiness for overseas OEM buyers.
Certification & testing
ISO 9001:2015 quality system and in-house material testing.
ISO 9001:2015 quality management system
Our castings are produced at an ISO 9001:2015 (GB/T 19001-2016) certified works. The certificate is held by our same-factory affiliate, Gaomi Changrong Precision Casting Co., Ltd.; certified scope is processing of steel castings, valid to 2027-04-21 (certifier: POCNC). Click the certificate to view or download the full document.
In-house material testing and reports
- Material test reports issued by our own works covering chemical composition and mechanical properties
- Mechanical testing: tensile strength, yield strength, and hardness
- Non-destructive flaw detection when specified on the drawing or order
Inspection Confidence
Quality support built around buyer requirements.
For custom metal parts, the most important quality points usually come from drawings, application conditions, tolerances, surface finish, and packing requirements.
- Drawing review
- Material confirmation
- Process confirmation
- Key dimension check
- Surface finish review
- Packing check
- Shipment readiness check
Buyer Checklist
- Drawing review
- Material confirmation
- Process confirmation
- Key dimension check
- Surface finish review
- Packing check
- Shipment readiness check
Related Pages
Send your quality requirements.
Share drawings, tolerance requirements, inspection needs, material grade, and application environment.