TIGMASTER-250COLD: The World’s Most Portable 250A Pulse TIG/MMA Welder 9.5kg | 100% Duty Cycle @ 250A / 40°C | 5A TIG Start | 0.1–500Hz Pulse | 2T/4T/S4T/SPOT Modes

Built by KEYGREE – 700,000 Units/Year of Welding Equipment

KEYGREE GROUP CO., LTD. produces 700,000 sets of welding equipment annually, trusted by professionals in over 100 countries — from European fabrication shops to Middle Eastern pipeline contractors, from Southeast Asian shipyards to African mines.

Certified Quality: CE, ISO 9001, BSCI, FCCA (CNAS pending) — your guarantee of safety, reliability, and ethical production.

Why TIGMASTER-250COLD Sets a New Standard

*Comparison based on published specifications of leading brands in the 250A DC TIG/MMA class.

Full Technical Specifications

Global Service & Support

Wherever you are, KEYGREE ensures you stay productive:

• Worldwide Distributor Network– Spare parts and service in over 50 countries
• 24/7 Technical Support– English, Spanish, Arabic, Russian, French
• 2-Year Warranty– Standard on all TIGMASTER series
• Fast Logistics– Air, sea, and rail options with tracking
• Online Training– Video manuals, webinars, and on-site training available
• Generator-Ready– Stable performance even in remote sites with unstable power

Global Application Case Studies

Precision Fabrication – Germany

Challenge: TIG welding 0.8mm stainless steel for high-end automotive components required ultra-clean starts and precise heat management.

Solution: TIGMASTER-250COLD with 5A TIG start, 0.1–500Hz pulse control, and intelligent cooling.

Result:

• 30% equipment cost savings compared to previous premium brand
• Cleaner starts eliminated post-weld cleanup on thin sheet
• Finer pulse control enabled heat management for distortion-free welds
• Now standard equipment across their precision fabrication line

Pipeline Construction – UAE

Challenge: On-site pipeline welding in 45°C ambient temperatures required equipment that could withstand heat and be easily transported.

Solution: TIGMASTER-250COLD with 100% duty cycle, 9.5kg portability, remote control, and switchable VRD.

Result:

• 20 units deployed across major oil & gas projects
• Zero thermal shutdowns despite 45°C+ ambient temperatures
• One technician can carry and operate — reduced crew size by 2 per site
• VRD enabled safe multi-crew operations in confined spaces

Mining Maintenance – South Africa

Challenge: Crack repair on heavy mining equipment required precision welding without distortion; harsh, dusty environment demanded reliable equipment.

Solution: TIGMASTER-250COLD with cold welding (1–500ms), spot welding with adjustable interval, and intelligent cooling.

Result:

• Cold welding mode eliminated distortion on crack repairs
• Intelligent cooling reduced dust ingestion — extended equipment life by 40%
• Repair time reduced by 35% with quick spot tacking
• Now standard across 3 mine sites

Shipbuilding – Indonesia

Challenge: Aluminum TIG welding on passenger ferries required focused arc control and equipment that could operate on generator power in a tropical shipyard.

Solution: TIGMASTER-250COLD with 500Hz pulse frequency, S4T mode, and generator compatibility.

Result:

• Replaced bulky machines — freed up workshop space by 30%
• S4T mode reduced operator fatigue on long hull seams
• Generator-friendly operation on 10kVA diesel genset — no grid power needed
• Fleet expanded to 15 units across 2 shipyards

Agricultural Equipment Manufacturing – Brazil

Challenge: Mixed production of carbon steel and stainless steel components required quick process switching and export compliance.

Solution: TIGMASTER-250COLD with TIG/MMA dual-process capability, adjustable post-gas up to 25s, and CE certification.

Result:

• Quick switch between TIG and MMA — reduced changeover time by 80%
• 25s post-gas enabled titanium welding for specialized components
• CE certified — hassle-free export to EU markets
• Production capacity increased by 25% with same workforce

Why Global Professionals Choose TIGMASTER-250COLD

• Ultra-portable + full duty cycle — 9.5kg with 100% duty cycle at 250A — no compromises
• Precision control — 5A start, 0.1–500Hz pulse, 10–90% pulse duty cycle — finer adjustment than class leaders
• Advanced torch modes — S4T for automated slope, SPOT for production tacking
• Intelligent cooling — runs only when needed — cleaner, quieter, longer life
• Global support network — parts and service in over 50 countries
• Private labeling available for volume partner

Ready to Elevate Your Welding Capability?

Contact us today for:

• Free sample testing– we’ll ship a unit to qualified partners
• Detailed datasheetwith pulse curves and duty cycle certification
• Weld test videos(5 A start, pulse modes, spot welding)
• Distributor pricingfor global markets
• OEM/ODM collaboration

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

*Specifications subject to change without notice. TIGMASTER is a trademark of KEYGREE GROUP CO., LTD. Third-party test reports available upon request.*