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Carbon Steel Stamping Parts
-- Steady & Reliable Manufacturer --
Yuyao Hongli Optoelectronics Co., Ltd. is a specialized source manufacturer of Carbon Steel Stamping Parts, providing high-strength brackets, mounting plates, structural fittings, and deep-drawn cups for automotive, industrial, construction, and appliance markets. Operating out of our 5,000-square-meter plant in Yuyao, Zhejiang, we utilize heavy-tonnage mechanical presses, progressive stamping lines, and automated welding cells. We process cold-rolled (SPCC), hot-rolled (SPHC), and high-strength low-alloy (HSLA) steel grades ranging from thin sheet metal to 6.0mm heavy plates. Benefit from Yuyao Hongli鈥檚 20+ years of tooling heritage, in-house zinc plating and e-coating, and high-volume OEM contract manufacturing.
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Stamped sheet metal parts for automotive
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Stamped circular parts with holes
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Stamped square parts with holes
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Stamped ultra-thin parts
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Stamped small square parts
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Stamped miniature parts
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Stamped bendable strip-shaped parts
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Square-shaped precision machined stamped parts
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Stamped chassis parts
MANUFACTURING CAPABILITIES
Equipment and process capabilities
From mold design to batch stamping, we cover production needs of different tonnages and precision levels.
- 01
Heavy-Gauge Carbon Steel Stamping
Utilizing high-tonnage presses up to 200T, we form thick hot-rolled carbon steel plates into heavy structural brackets and mounting plates without edge cracking.
- 02
High-Speed Progressive Stamping
Our multi-station progressive dies punch, form, and bend cold-rolled steel coils continuously at high production speeds with consistent dimensional tolerances.
- 03
Deep Drawing & Seamless Shell Fabrication
Using multi-stage hydraulic drawing presses, we transform carbon steel blanks into cylindrical shells, oil pan cups, and motor housings without sidewall thinning.
- 04
Robotic Welding & Assembly Integration
Automated MIG/TIG and spot-welding robotics join stamped carbon steel parts into complex structural assemblies with high seam penetration and load capacity.
SPEC · Overview of Key Equipment Parameters
| Equipment Type | Tonnage / Specification | Machinable Material | Typical Processing Thickness |
|---|---|---|---|
| Heavy Mechanical Stamping Press | 45T - 200T Stamping Press | SPCC, SPHC, Q235, Q345, HSLA Steel | 0.5mm - 6.0mm Carbon Steel |
| Hydraulic Deep Drawing Press | 80T - 250T Deep Draw Unit | Cold Rolled Drawing Grade Steel (SPCD/SPCE) | 0.6mm - 3.5mm Sheet Metal |
| Robotic MIG/TIG Welding Cell | 6-Axis Automated Welding Robot | Carbon Steel Assemblies & Plates | Weld Penetration up to 6.0mm |
| Automated Zinc Plating Line | Continuous Barrel/Rack Plating | Stamped Carbon Steel Components | Plating Thickness 5 - 15 microns |
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.
Structural Load & Tensile Testing
Ensuring heavy-gauge steel stampings meet critical mechanical load requirements.
- Tensile and yield strength testing on raw steel coil and finished stampings.
- Weld seam destructive and non-destructive testing (NDT) for structural joints.
- Press load verification and bend angle retention checking.
Corrosion Resistance & Plating Quality Audit
Testing electroplated and coated carbon steel parts for long-term rust prevention.
- Neutral Salt Spray (NSS) testing per ASTM B117 (up to 720 hours for e-coated/zinc-nickel parts).
- XRF thickness measurement for zinc, nickel, and e-coat layers.
- Cross-hatch paint adhesion testing (ASTM D3359).
Dimensional CMM & Fitment Inspection
Verifying exact hole centers, overall flatness, and fitment alignment.
- 3D Coordinate Measuring Machine (CMM) checking against CAD model GD&T parameters.
- 100% Go/No-Go fixture checking for mounting hole pattern alignment.
- Surface roughness and burr height inspection.
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 Process | Applicable Material | Primary Function | Typical Application |
|---|---|---|---|
| Trivalent Zinc Plating (Clear/Yellow/Black) | SPCC, SPHC, Q235 Carbon Steel | Provides economical corrosion protection and clean aesthetic finish | Automotive mounting brackets, chassis clips, appliance fittings |
| Electrophoretic Coating (E-Coating) | Heavy Carbon Steel Stampings | Delivers uniform, high-corrosion-resistant primer coverage in deep recesses | Underbody vehicle brackets, suspension arms, commercial truck hardware |
| Powder Coating (Textured/Smooth) | Structural Steel Plates & Frames | Applies thick, scratch-resistant, weather-durable outdoor protective coating | Industrial equipment enclosures, agricultural machinery mounts |
| Black Oxide Treatment | Carbon Steel Fasteners & Clips | Offers mild corrosion resistance with non-reflective black appearance | Internal mechanical clips, retaining brackets, engine fittings |
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.
Automotive Chassis & Body Hardware
High-strength carbon steel stampings engineered for vehicle structural support and chassis mounting.
- Automotive chassis reinforcement plates and crossmember brackets
- Engine mount brackets and transmission support clips
- Seat frame structural connectors and latch components
Industrial Machinery & Heavy Equipment
Heavy-gauge carbon steel stampings built to withstand rigorous mechanical stress and impact.
- Agricultural equipment mounting plates and guard covers
- Construction machinery pivot brackets and frame supports
- Pneumatic and hydraulic pump housing plates
Home Appliances & Building Hardware
Precision cold-rolled carbon steel stampings for consumer appliances and structural hardware.
- Washing machine and refrigerator chassis brackets
- HVAC compressor mounting bases and fan brackets
- Electrical junction box brackets and mounting plates
PRODUCTION / FACTORY ADVANTAGES
Factory production advantages
With its own factory and equipment, the company ensures stable delivery times and controllable costs.
20+ Years of Heavy Stamping Heritage
Yuyao Hongli offers two decades of experience in heavy-gauge carbon steel forming, deep drawing, and tooling fabrication.
In-House Stamping, Welding & Plating
Our 5,000 sqm plant integrates progressive stamping, robotic welding, and automated surface plating under one roof.
High-Volume Cost Efficiency & Scale
Direct raw material sourcing and high-speed press automation deliver competitive factory-direct pricing.
CUSTOM MANUFACTURING PROCESS
Customized production process
From receiving drawings to batch delivery, standardized processes ensure traceability at every stage.
1. Engineering Print & DFM Review
Engineers analyze 2D/3D drawings, evaluate press tonnage requirements, select steel grades, and plan progressive die steps.
2. Tooling Design & Progressive Die Build
Our toolmaking shop machines high-durability SKD11/D2 tool steel dies to handle high-stress carbon steel stamping.
3. Trial Stamping, CMM & Load Testing
Sample stampings undergo full CMM dimensional checks, tensile testing, and plating trial sign-off.
4. Mass Stamping, Welding & Plating
Automated presses run high-volume production, feeding directly into robotic welding cells and plating lines.
5. Final Quality Audit & Bulk Packaging
Parts are inspected for dimension and finish, treated with anti-rust oil, and packed into heavy export cartons or pallets.
FAQ
Frequently Asked Questions
Here are some questions that clients often ask before cooperating with us.
What steel grades do you use for carbon steel stamping parts?
We process cold-rolled steel (SPCC, SPCD, SPCE), hot-rolled steel (SPHC, Q235, Q345), and high-strength low-alloy (HSLA) steels.
What maximum steel thickness can your stamping presses handle?
Our heavy-tonnage presses and hydraulic units can stamp and form carbon steel plates up to 6.0mm in thickness.
What corrosion protection options do you recommend for outdoor steel parts?
For severe outdoor exposure, we recommend zinc-nickel plating or electrophoretic coating (E-coating) combined with powder coating.
Can you perform secondary welding and sub-assembly?
Yes. We have 6-axis robotic welding cells and spot-welding machines to deliver completed structural sub-assemblies.
About Us
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 Carbon Steel Stamping Parts Suppliers and Carbon 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.
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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