MIG-500Z Industrial Pulse MIG Welder – Engineered for Shipyards Worldwide 100% Duty Cycle @500A | Customizable Aluminum Welding | Global Service Network

With 700,000 units annual production capacity and CE, ISO, BSCI, FCCA certification, KEYGREE delivers industrial-grade welding solutions trusted by shipyards across Asia, Europe, the Americas, Africa, and Oceania.

The MIG-500Z — proven in Southeast Asian shipyards — is now ready to serve the global maritime industry, from aluminum high-speed craft to VLCC supertankers.

MIG-500Z – The Shipyard Choice Worldwide

The MIG-500Z is specifically engineered for the demanding environment of shipbuilding and ship repair. Its combination of true 100% duty cycle for continuous operation and customizable aluminum welding capability makes it the ideal choice for shipyards constructing everything from aluminum high-speed craft to VLCC supertankers.

Key Technical Specifications— Engineered for Shipyard Demands

Global Service Capability – Wherever Your Shipyard Is

WENZHOU KEYGREE ELECTRIC CO.,LTD. understands that shipyards operate 24/7 across all time zones. Our global service network ensures you receive support when and where you need it.

 Global Case Studies – MIG-500Z in Shipyards Around the World

We have structured our case studies around the "Customer + Challenge + Solution + Result" framework to demonstrate how MIG-500Z performs in real shipyard conditions across different continents.

 Southeast Asia: Vietnam – Aluminum High-Speed Vessel Construction

Customer: Major shipyard in Hai Phong, Vietnam, specializing in aluminum patrol boats and passenger ferries

Challenge:

• Constructing aluminum vessels required consistent, high-quality aluminum welds
• Wire feeding instability during aluminum welding caused defects
• Limited experienced aluminum welders in the local workforce

Solution with MIG-500Z:

• 100% duty cycle @40°Cenabled continuous production without cooling breaks
• Synergic modesimplified setup – select wire type and the machine automatically sets parameters
• Digital parameter controlallowed fine-tuning of arc characteristics

Result:

• 40% reductionin aluminum weld rework
• 30% increasein production throughput
• New welders reached production quality inhalf the usual training time
• Successfully delivered multiple aluminum vessels with100% classification society approval

Middle East: UAE – Offshore Structure Fabrication

Customer: Offshore fabrication yard in Dubai, UAE, serving the Arabian Gulf oil and gas industry

Challenge:

• Fabricating offshore platforms required welding inhigh ambient temperatures (up to 50°C)
• Stainless steel and duplex steel welding demanded precise heat input control
• Stringent quality requirements from ADNOC and international operators

Solution with MIG-500Z:

• Engineered for 40°C ambient operationwith intelligent cooling system
• Pulse MIG capabilitydelivered controlled heat input, minimizing oxide formation on stainless steel
• Adjustable Arc Start/End Arcenabled precise control for root passes
• Parameter memorylocked approved WPS settings for repeatability

Result:

• Achieved98% first-pass acceptance on critical offshore welds
• Maintainedfull productivity during summer months when other equipment overheated
• Successfully qualified forISO 3834 certification
• Expanded client base to include major oil and gas operators

Northern Europe: Poland – Ship Repair & Conversion

Customer: Ship repair yard in Gdańsk, Poland, servicing vessels in the Baltic Sea

Challenge:

• Repairing diverse vessels required welding various materials and thicknesses
• Tight turnaround schedules demandedreliable equipment with minimal downtime
• Winter conditions required equipment that performs inlow temperatures

Solution with MIG-500Z:

• Robust constructionwithstands both shipyard workshop conditions and outdoor repair work
• Multi-process capability(MIG/MMA/TIG) covered all repair applications
• 100% duty cycleenabled continuous welding during critical repair windows
• Digital parameter memorystored programs for common repair scenarios

Result:

• Eliminatedequipment downtime during critical repair projects
• Completed emergency repairs25% faster with reliable, continuous operation
• Reduced equipment inventory by consolidating multiple machines into one unit
• Achievedhigher customer satisfaction with faster vessel turnaround

South America: Brazil – Heavy Plate Shipbuilding

Customer: Shipyard in Rio de Janeiro, Brazil, constructing offshore support vessels and tugboats

Challenge:

• Hull construction required welding thick steel plates (up to 50mm) with deep penetration
• Maintaining consistent quality across multiple shifts and different welders
• Power grid fluctuations affected equipment performance

Solution with MIG-500Z:

• 500A outputdelivered the power needed for deep penetration on heavy plate
• 100% duty cycleenabled continuous multi-pass welding without interruption
• Wide voltage tolerance (±15%)handled regional power variations
• Parameter memorylocked WPS settings for consistency across shifts

Result:

• Increased hull assembly speed by 35%
• Reduced weld rework by 50%through consistent parameter control
• Passed classification society audits withzero major non-conformances
• Expanded construction capability to larger vessel classes

West Africa: Nigeria – Shipbreaking & Recycling

Customer: Ship recycling facility in Lagos, Nigeria, processing end-of-life vessels

Challenge:

• Shipbreaking operations required heavy-duty gouging and cutting
• Equipment needed to withstand harsh coastal environment
• High duty cycle for continuous daily operation
• Simple, reliable operation with minimal maintenance requirements

Solution with MIG-500Z:

• 500A outputprovided ample power for gouging and heavy cutting
• 100% duty cycleenabled continuous operation throughout the workday
• MMA modewith Arc-Force control ensured stable arc for gouging electrodes
• Robust constructionwithstood demanding yard conditions

Result:

• Increasedprocessing speed by 30% with more powerful, reliable equipment
• Reduceddowntime by 60% compared to previous equipment
• Loweredoperating costs through improved efficiency
• Expanded recycling capacity to handle larger vessels

East Asia: South Korea – Shipbuilding Subcontractor

Customer: Welding subcontractor serving major Korean shipyards in Ulsan and Geoje

Challenge:

• Meeting production targets for world's largest shipbuilders
• Maintaining consistent quality across high-volume production
• Training new welders quickly to meet demand

Solution with MIG-500Z:

• Synergic modesimplified operation for new welders
• 100% duty cycleenabled continuous production without cooling breaks
• Digital parameter controlensured consistent quality across all shifts
• Memory channelsstored approved parameters for different joint types

Result:

• Increasedproductivity by 30% per welder
• Reducedtraining time for new welders by 50%
• Achievedzero defects on critical production lines
• Expanded contracts with major Korean shipbuilders

Certifications – Quality You Can Trust

WENZHOU KEYGREE ELECTRIC CO.,LTD. is committed to the highest quality standards. Our MIG-500Z and all KEYGREE products are manufactured under strict quality control systems.

Why WENZHOU KEYGREE ELECTRIC CO.,LTD.?

1. Massive Production Capacity – 700,000 Sets Annually

Our 700,000 units per year production capacity ensures:

• Stable supplyfor shipyards worldwide
• Competitive pricingthrough economies of scale
• Fast deliveryto any global port
• Consistent qualityacross all production batches

2. Shipyard-Focused Engineering

The MIG-500Z was designed specifically for shipyard applications:

• 100% duty cycle @40°C– continuous operation in tropical and temperate climates
• Customizable aluminum welding– optimized parameters for different alloys
• Robust construction– built to withstand demanding shipyard environments
• Multi-process capability– one machine for all shipyard welding needs

3. Global Certification Pathway

Our commitment to quality is demonstrated by our certification journey:

• Current:CE, ISO, BSCI, FCCA certified
• In progress:CNAS accreditation for enhanced global recognition
• Future:Pursuing additional classification society approvals based on customer demand

4. Customer-Centric Approach

We don't just sell machines – we provide solutions:

• Customizable parametersfor specific applications
• Technical supportin multiple languages
• Spare partsshipped within 48 hours to major ports
• Trainingavailable for shipyard welding personnel

Ready to Equip Your Shipyard?

Whether your shipyard operates in Asia, Europe, the Americas, Africa, or Oceania — the MIG-500Z is ready to support your welding operations.

Take the next step:

• Request a shipyard-specific technical datasheet
• Schedule a virtual demo with our maritime welding specialists
• Inquire about classification society approval support
• Website:keygree.com

Contact KEYGREE: www.keygree.com | Response within 24 hours

*Specifications subject to change without notice. Certifications may vary by model and destination. For shipyard-specific application requirements, please consult KEYGREE technical support.*