3003 3004 3005 3105 H22 Aluminum Plate 1220*2440mm 1500*3000mm Aluminum Sheet

Our 3003 H22 brazed liquid cooling plate is built on 3003 and 3004 brazing sheet with a vacuum brazed channel, in a standard 400x300x10mm format or to your drawing. It is used for IGBT power modules, battery packs, EV chargers and data centre liquid cooling, where leak tightness and thermal resistance decide whether the design works.

Every plate is helium leak tested at 1.5 times working pressure before packing, and brazed seams are checked by ultrasonic and X-ray. Channel layout, port position and mounting holes are machined to drawing, then the surface is anodized, powder coated or passivated according to the assembly requirement.

A test file ships with each batch: helium leak record, pressure hold record, dimensional report and EN 10204 3.1 material certificate. Thermal resistance can be measured per drawing on request, so your simulation can be validated against measured data rather than datasheet assumptions.

• Product Name: 3003 H22 Brazed Liquid Cooling Plate 400x300x10mm
• Alloy: 3003, 3004, 6061 brazing sheet
• Temper: H22, H24, O clad
• Plate Size: 400x300x10 mm, custom size available
• Process: Vacuum brazing, friction stir welding on request
• Leak Test: Helium leak test at 1.5 times working pressure
• Internal Inspection: Ultrasonic and X-ray on brazed seam
• Channel: Serpentine, parallel or pin fin, per drawing
• Ports: G1/4, G3/8, custom thread and fitting
• Surface Treatment: Anodized, powder coated, passivated
• Flatness: 0.5 mm per 100 mm after brazing
• Pressure Hold: 1.5 times working pressure, 30 minutes
• Thermal Resistance: Measured per drawing on request
• Certification: ISO 9001:2015, SGS, RoHS
• Documents: Leak record, dimensional report, mill certificate
• Export Packing: Foam lined carton, desiccant, ISPM 15 pallet
• MOQ: 50 pieces, trial order negotiable
• Sample: Sample with full test report in 15-20 days

• Leak tested, not spot checked: every plate passes a helium leak test at 1.5 times working pressure, because a leak on site costs far more than the plate.
• Seam integrity verified: ultrasonic and X-ray checks confirm fillet formation and detect voids before machining.
• Thermal data available: thermal resistance can be measured per drawing so the cooling design is validated with measured numbers.
• Flat interface: flatness controlled to 0.5mm per 100mm improves contact with the IGBT base plate and reduces thermal interface material thickness.
• Clean channel: controlled brazing cycle avoids blockage and flux residue, keeping pressure drop within the design value.
• Full document pack: leak record, pressure hold record, dimensional report and material certificate are delivered with each batch.

Brazed aluminum cold plates are used where heat has to be removed from a power device through a sealed liquid circuit.

1. IGBT and power module cooling in inverters and converters.
2. EV battery pack cold plates and module cooling plates.
3. Onboard charger and DC-DC converter cooling.
4. Data centre server and rack level liquid cooling.
5. Energy storage system (ESS) container thermal management.
6. Motor controller, laser and medical equipment cooling.

We customize plate size, channel layout, port size and position, mounting hole pattern, surface treatment and marking to your drawing. Thermal and pressure drop targets can be reviewed before design freeze, and a pre production sample with full test report can be supplied for validation.

• Full-process manufacturer: casting, hot rolling, cold rolling, annealing, leveling, cut to size, inspection and export packing are completed inside our own plant, so plate quality and delivery are controlled by one team instead of being outsourced to several workshops.
• 26 years of aluminum processing: established in 1999 with more than 2000 employees, annual sales of USD 30-35 million and export business covering more than 60 countries.
• Stable capacity: 5000 tons of monthly output supports long term supply contracts, repeat orders and batch-to-batch consistency, with reserved production slots for regular buyers.
• In-house laboratory: direct reading spectrometer, tensile and elongation testing machine, salt spray chamber, ultrasonic inspection, thickness gauge and flatness measurement are used on every batch.
• Certified quality system: ISO 9001:2015 management system, ASTM B209 and EN 485 material standards, EN 10204 3.1 mill test certificate, SGS and TUV third party inspection accepted, factory audit welcomed.
• Engineering support: our technical team helps buyers select alloy, temper and surface treatment for their welding, bending, drawing or coating process before the order is placed.
• Fast commercial response: quotation within 24 hours, free samples in 3-5 days, 7-20 days production lead time and complete shipping documents for customs clearance.
• Export logistics: loading from Qingdao, Shanghai, Ningbo or Tianjin with optimized 20GP and 40HQ loading plans, ISPM 15 heat treated pallets and full document service.

Our engineers review heat load, flow rate and pressure drop target, then propose channel geometry and plate thickness accordingly.

Test records are retained per serial number, so any field question can be traced to the exact brazing batch and inspection data.

Repeat orders keep the same brazing programme and machining fixture, so thermal performance and fit stay consistent.

Plates are packed in foam lined cartons with a desiccant bag and sealed plastic bag to prevent condensation during sea freight.

Cartons are palletised with corner protection and ISPM 15 heat treated wood for EU, US and Australian customs.

Ports are capped and labelled, and each carton carries the batch number for incoming inspection.

Q1: Are you a factory or a trading company?
We are a manufacturer with our own casting, rolling, annealing, leveling and cut to size lines in Henan, China. Buyers are welcome to visit the workshop or arrange a third party factory audit.

Q2: Can I get a free sample?
Yes. Free samples are prepared in 3-5 days and the buyer only covers the freight, so material performance and surface quality can be verified before the mass order.

Q3: What is the MOQ?
1 ton per size for regular production. Mixed sizes can be loaded in one container and trial orders are negotiable.

Q4: How is quality guaranteed?
Every batch is tested in our own laboratory and shipped with mill test certificate, mechanical property report and dimensional inspection report.

Q5: What payment terms do you accept?
T/T, L/C at sight, D/P and D/A. Other terms can be discussed for long term cooperation.

Q6: Is a leak test report supplied with each plate?
Yes. A helium leak test record at 1.5 times working pressure is supplied for every plate, together with the pressure hold record.

Q7: Can you design the channel for my heat load?
Yes. Send the heat load, flow rate and pressure drop target, and our engineers will propose channel geometry and plate thickness.

Q8: Do you machine ports and mounting holes?
Yes. Ports, threads and mounting holes are CNC machined to drawing, with anodizing or passivation applied afterwards.