Galvanized Steel Stamping Parts Wholesale

Galvanized Steel Stamping Parts

-- Steady & Reliable Manufacturer --

Yuyao Hongli Optoelectronics Co., Ltd. is a specialized OEM manufacturer of Galvanized Steel Stamping Parts, delivering durable mounting brackets, electrical junction boxes, structural plates, and HVAC hardware. Located in Yuyao, Zhejiang, our 5,000-square-meter facility houses heavy-tonnage mechanical presses, progressive stamping lines, and automated riveting equipment. We process electro-galvanized (SECC/SECD) and hot-dip galvanized (SGCC/DX51D) steel sheets, capitalizing on their pre-coated zinc layer for superior corrosion protection and immediate cost efficiency. Trust Yuyao Hongli for over 20 years of tooling expertise, custom progressive die design, and direct-factory contract manufacturing.

MANUFACTURING CAPABILITIES

Equipment and process capabilities

From mold design to batch stamping, we cover production needs of different tonnages and precision levels.

  • 01

    Progressive Die Stamping on Pre-Coated Steel

    Using multi-station progressive dies, we punch, notch, form, and bend galvanized steel sheet coils rapidly without damaging the zinc coating.

  • 02

    Heavy-Gauge Structural Bracket Forming

    Utilizing presses up to 200T, we form thick hot-dip galvanized steel plates into high-strength mounting brackets and structural supports.

  • 03

    In-Die Hardware Insertion & Riveting

    Our specialized dies integrate automated feeding systems to insert standoffs, PEM nuts, and threaded studs directly during the press stroke.

  • 04

    Precision Deep Drawing & Shell Fabrication

    Multi-stage hydraulic presses draw galvanized steel blanks into electrical outlet boxes, enclosures, and protective covers while preserving coat integrity.

SPEC · Overview of Key Equipment Parameters

Equipment TypeTonnage / SpecificationMachinable MaterialTypical Processing Thickness
Heavy Progressive Stamping Press45T - 200T Precision PressSECC, SECD, SGCC, DX51D, DX52D Galvanized Steel0.4mm - 4.0mm Galvanized Sheet
Hydraulic Deep Drawing Press80T - 250T Double-Action PressDrawing Grade Electro-Galvanized Steel0.5mm - 2.5mm Sheet Stock
In-Die Hardware Insertion UnitAutomated Servo PEM Nut FeederGalvanized Steel StampingsM3 to M10 Threaded Fasteners
CNC Fiber Laser Cutter3000W High-Speed LaserGalvanized Steel Plate0.5mm - 6.0mm Cutting Range
QUALITY CONTROL

Full-process quality control system

From incoming material inspection to full outgoing inspection, key processes are equipped with inspection points to ensure batch consistency.

Zinc Coating Integrity & Corrosion Testing

Verifying that forming operations maintain protective zinc layers for outdoor exposure.

  • Magnetic coating thickness testing for zinc layer density (Z80 - Z275 ratings).
  • Neutral Salt Spray (NSS) testing per ASTM B117 to verify rust resistance on sheared edges.
  • Chemical passivation checks for chromated/anti-fingerprint coatings.

CMM & Hole Alignment Inspection

Ensuring absolute dimensional fidelity and hole pattern accuracy across stamped panels.

  • 3D Coordinate Measuring Machine (CMM) inspection against 3D CAD files.
  • Go/No-Go pin gauge checking for 100% inspection of mounting hole patterns.
  • Torque push-out and pull-out testing for in-die inserted threaded fasteners.

Flatness & Edge Burr Measurement

Guaranteeing smooth handling and seamless assembly on cabinet panels and structural brackets.

  • Laser profilometer flatness measurement across broad surface panels.
  • Optical burr height checking (maintaining burrs under strict internal standards).
  • Material tensile and yield strength verification on incoming raw coils.
SURFACE FINISHING

Surface treatment process

Depending on the usage environment and appearance requirements of the parts, we offer anti-corrosion, wear-resistant, or decorative surface treatment solutions.

Finishing ProcessApplicable MaterialPrimary FunctionTypical Application
Anti-Fingerprint (AFP) Clear CoatingSECC Electro-Galvanized SteelPrevents smudge marks, enhances aesthetic finish, and aids cleanroom handlingComputer chassis covers, server rack panels, home appliance interiors
Chemical Passivation (Chromate/Cr-Free)SGCC Hot-Dip Galvanized SteelProtects against white rust during storage and outdoor humidity exposureHVAC duct brackets, outdoor electrical box plates, solar hardware
Powder Coating (Optional)All Galvanized Steel StampingsAdds a double-layer protective barrier with custom decorative colorsOutdoor enclosures, automotive underbody brackets, agricultural equipment
Zinc-Rich Edge Touch-UpHeavy Sheared Galvanized SteelSeals cut edges on thick plates to prevent localized red rust formationHeavy structural framing brackets, solar mounting rails
Note: The above is a standard process list. Specific film thickness, color, and salt spray resistance rating can be customized according to customer drawings.
APPLICATIONS

Main application areas

Our products are widely used in industries that require high structural strength and precision consistency.

Electrical Enclosures & Junction Boxes

Corrosion-resistant galvanized steel stampings for electrical power distribution.

  • Electrical outlet junction boxes and cover plates
  • Control panel mounting sub-plates and DIN rails
  • Cable tray brackets and conduit support clamps

HVAC & Building Construction Hardware

Durable, rust-resistant galvanized steel stampings built for building infrastructure.

  • HVAC duct hanging brackets and damper framing
  • Building framing hurricane ties and joist hangers
  • Solar panel mounting clips and purlin brackets

Automotive & Home Appliance Housings

Economical structural components for high-volume appliance and vehicle assembly.

  • Washing machine and dryer internal structural brackets
  • Computer server rack chassis plates and drawer slides
  • Automotive door latch plates and window regulator brackets
PRODUCTION / FACTORY ADVANTAGES

Factory production advantages

With its own factory and equipment, the company ensures stable delivery times and controllable costs.

20+ Years of Tooling & Stamping Mastery

Yuyao Hongli brings over two decades of expertise in precision die design, springback control, and galvanized metal forming.

Cost-Effective Pre-Coated Material Processing

Eliminate post-stamping plating steps by utilizing pre-galvanized coils, drastically reducing unit costs and turnarounds.

In-Die Fastener Insertion Capabilities

Automated in-die PEM nut and stud insertion reduces labor costs and guarantees 100% fastener placement accuracy.

CUSTOM MANUFACTURING PROCESS

Customized production process

From receiving drawings to batch delivery, standardized processes ensure traceability at every stage.

  • 1. Print Review & Coating Selection

    Engineers evaluate application environments to select SECC or SGCC steel grades and determine optimal zinc coating weights.

  • 2. Progressive Tooling Design & Fabrication

    In-house toolmakers fabricate multi-station progressive dies designed with smooth forming radii to preserve the zinc layer.

  • 3. Trial Stamping & First Article Inspection (FAI)

    Sample parts undergo CMM dimensional audits, fastener torque tests, and salt spray exposure for sign-off.

  • 4. High-Volume Progressive Stamping

    Automated presses run high-speed production from continuous coil stock, with optional in-die nut insertion.

  • 5. Quality Audit & Export Packaging

    Parts undergo optical dimensional checks, anti-moisture packaging, and secure export palletizing.

FAQ

Frequently Asked Questions

Here are some questions that clients often ask before cooperating with us.

What is the difference between SECC and SGCC galvanized steel?

SECC is electro-galvanized steel with a smooth, uniform surface ideal for painting and indoor electronics; SGCC is hot-dip galvanized with a thicker zinc coating for superior outdoor rust protection.

Does the zinc layer peel off during deep drawing or heavy bending?

No. We select specialized drawing-grade galvanized steels (such as SECD/DX52D) and design dies with polished radius inserts to prevent flaking or micro-cracking.

Can you install PEM nuts or studs during the stamping process?

Yes, we utilize in-die automated fastener feeding units to install nuts and standoffs directly within the stamping cycle.

What thickness range of galvanized steel can you stamp?

We routinely process galvanized sheet metal ranging from 0.4mm up to 4.0mm in thickness.

About Us
Yuyao Hongli Optoelectronics Co., Ltd.
Yuyao Hongli Optoelectronics Co., Ltd.
Yuyao Hongli Optoelectronics Co., Ltd. is a comprehensive enterprise with over 20 years of experience in the manufacturing industry. Located in the Yangming Science and Technology Industrial Park of Yuyao, Zhejiang Province, it enjoys convenient transportation and a solid industrial foundation. As a famous China Galvanized Steel Stamping Parts Suppliers and Galvanized Steel Stamping Parts Factory, founded in 2000, formerly known as Yuyao Hongli Optoelectronics Educational Instruments Co., Ltd., the company is wholly owned by a natural person, with Xie Gang as the legal representative. Its registered capital of 500,000 yuan has been fully paid up, and it has maintained its continued development through stable operations.
Relying on a 5,000-square-meter modern factory and multiple stamping workshops, the company has built a diversified product system. Its core businesses cover the manufacturing, processing and wholesale and retail of educational instruments, optical instruments, household electric heaters, small household appliances, auto parts, hardware and plastic products, etc. At the same time, it operates and acts as an agent for the import and export trade of goods and technologies, and its products are sold at home and abroad.
The company brings together industry management elites and senior engineers to form a mature R&D and management team. Adhering to the business philosophy of "integrity and pragmatism," it is committed to providing customers with high-quality products and comprehensive after-sales service. Leveraging its diversified portfolio, certification guarantees, and import/export advantages, the company actively expands cooperation both domestically and internationally, and is willing to establish long-term and stable trade partnerships with partners from all sectors, continuously striving forward in the wave of intelligent and high-end development in the manufacturing industry.
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