Zhichengjia Metal Technology logo Zhichengjia MetalXiangyang · Precision Fasteners
Get a Quote
Home / Quality

Production & Quality

Quality isn't an inspection step at the end — it's engineered into every process and verified with in-house testing and 100% optical sorting.

5 Certificates11 Testing Categories100% Optical Sorting
Management Systems

Certified, Globally

Five international management-system certificates underpin everything we ship.

ISO 9001Quality management
IATF 16949Automotive quality
ISO 14001Environmental mgmt
ISO 45001Occupational safety
IECQ QC 080000Hazardous substance
Validation In-House

11 Categories of Testing Equipment

Because we validate in our own lab, reports come back in days, not weeks — and long-term customers get routine testing free.

Friction Coefficient Testing

Controlled friction (0.09–0.15 for ZT68) for predictable clamp and assembly torque.

Tensile & Stress-Strain Testing

Full tensile, yield, elongation and stress-strain curves on every critical material.

Hardness Testing

Rockwell / Vickers verification of heat-treatment and material hardness.

Salt-Spray Testing

Neutral salt-spray validation — ZT68 anodizing passes 60 days.

Aging & Environmental Testing

Thermal aging and environmental cycling to confirm long-term stability.

Dimensional & CMM

Coordinate measurement and gauge verification of critical features.

Coating Thickness & Metallographic

Plating thickness and microstructure analysis for process control.

Optical / Vision Sorting

100% automated optical inspection on critical dimensions before dispatch.

…plus more — 11 equipment categories in total.

Traceability

From Coil to Customer

Every lot is traceable to material, process and test records, and 100% of critical-dimension lots pass automatic optical sorting before dispatch.

01

Incoming Material

Certified coil and raw material with batch records.

02

In-Process Checks

SPC monitoring on cold forging, rolling and machining.

03

Lab Validation

Tensile, hardness, friction, salt-spray and aging.

04

Optical Sorting

100% automated vision check on critical dimensions.

85%Hidden · total cost
Total Cost of Ownership

The 15–85 Rule, Applied

A fastener's real cost is 15% purchase price and 85% everything that happens around it. We design each part to shrink the hidden 85%.

15% — Visible cost

Unit purchase price.

85% — Hidden cost

Design selection, supply chain, logistics & warehousing, quality inspection, pre-assembly, assembly and after-sales.

How We Cut It