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Ningbo Huayuan Metal Products Co., Ltd.

Toponewire supply certification with all shipments, containing full chemical analysis and also mechanical test results if requested. All incoming material is visually inspected and PMI (Positive Material Identification) tested before processing begins and all our production material is checked during each stage of processing. All incoming orders are produced to the individual customer specification, some of which may involve processing sample batches for testing prior to full production.
Final Inspection carried out on all finished material to include:
• Visual inspection
• Dimensional checks
• PMI (Positive Material Identification)
• Mechanical tests
In addition, we have examination facilities that allow visual inspection up to 400x, linked to computer software that can produce digital or photographic images. We also have equipment that enables preparation and examination of cross sections of material. This is useful when looking for problems such as inclusions or seams in the material.
Mechanical results are achieved utilizing the latest in-house testing equipment and computer software, which gives increased efficiency and high levels of accuracy of our testing methods.
  • Material and Tooling
  • Quality Control
  • Test Equipment
  • Certificates

Raw Material Check In-Stainless Steel Wire Rod

Wire tooling maintaining and inspection by rich experienced engineer with more than 10 years.



Stainless steel wire diameter and wire evenness controlled by workers on production lines



Stainless steel wire tensile strength test after every time of drawing and before packing


Stainless Steel Wire Hardness Test
 Stainless Steel Wire Spectral Analysis


• Tensile Strength Tests
• Proof Stress Tests
• Elongation
• Breaking Loads
• Hardness Tests
• Wrap Tests
• Bend Test
• Torsion Tests
• Post-Heat Treatment Tests
• Positive Material Identification Test (PMI)

All Hardnesses are tested in Vickers and converted using conversion tables in ASTM E140-65. Testing Machines:
Tensile Strength Test Machines
Harness Test Machine
Spectrum Analyzer
We have many certificates including ISO9001: 2008 Certificate and RoHS Product Report.

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