Custom Welding & Fabrication Services | MIG & TIG Welding Experts | Zhengna Technology, Zhejiang

MIG welding (Metal Inert Gas) uses a continuously fed consumable wire electrode and is faster, making it ideal for thicker materials and production work. TIG welding (Tungsten Inert Gas) uses a non-consumable tungsten electrode with separate filler material, offering superior precision and cleaner welds for thin materials and visible joints. MIG is generally more cost-effective for larger projects, while TIG provides better aesthetics and control for precision work. [3,4](@ref)

We specialize in welding a wide range of metals including mild steel, stainless steel, aluminum, and carbon steel. Our team is experienced with both ferrous and non-ferrous metals, and we can work with various alloys based on your specific requirements. For specialized materials like copper, titanium, or exotic alloys, please consult with our engineering team for feasibility assessment. [7](@ref)

Our capabilities range from thin sheet metal (0.5mm) to heavy plate (12mm+). For TIG welding, we typically handle materials from 0.5mm to 3mm thickness, while MIG welding is suitable for 3mm to 12mm+ materials. For extremely thick sections (25mm+), we employ specialized techniques and may recommend alternative joining methods. The optimal thickness depends on material type, joint design, and application requirements. [11,13](@ref)

We maintain strict quality control through certified welding procedures, qualified welders, and comprehensive inspection protocols. Our D1-certified team follows AWS/ASME standards, performs visual inspections, and can conduct non-destructive testing (NDT) as needed. Proper joint preparation, correct parameter selection, and post-weld treatments ensure weld strength typically exceeds base material strength when executed correctly. [6,8](@ref)

Yes, we can work from your existing drawings, CAD files, or even rough sketches. We accept DWG, DXF, PDF, and STEP files. If you don't have detailed drawings, our engineering team can help develop them based on your requirements. We provide Design for Manufacturing (DFM) feedback to optimize your designs for welding and fabrication efficiency. [10](@ref)

Lead times vary based on project complexity, quantity, and current workload. Simple brackets or components: 1-2 weeks. Medium complexity fabrications: 2-4 weeks. Complex structural assemblies or large quantities: 4-8 weeks. We provide accurate timelines during quotation and prioritize rapid prototyping services for urgent projects. Contact us with your specific requirements for a detailed schedule.

Yes, we offer complete finishing services including grinding, polishing, deburring, sandblasting, painting, powder coating, and assembly. Our turnkey approach means we can handle everything from raw material to finished product, including welding, machining, finishing, and quality inspection. This ensures consistency and reduces your supply chain complexity.

We serve diverse industries including automotive, construction, industrial machinery, medical equipment, aerospace, marine, food processing, and architectural metalwork. Our expertise spans from small precision components to large structural fabrications. Based in Zhejiang, China's manufacturing hub, we have extensive experience serving both domestic and international clients across multiple sectors.

Our 20,000 sqm facility in Zhejiang is equipped with overhead cranes (up to 20-ton capacity), large welding positioners, and heavy-duty fabrication equipment. We can handle fabrications up to 5 meters in length and 3 tons in weight. For larger projects, we utilize specialized jigs and fixtures to ensure accuracy and manage assembly logistics efficiently.

Our welding team holds D1.1 structural welding certification from the American Welding Society (AWS). We maintain ISO 9001 quality management certification and follow ASME Section IX for pressure vessel welding when required. All welders undergo regular training and qualification testing to ensure consistent quality across all projects. [1](@ref)