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At CSTHEATEXCHANGER, we design and manufacture high-strength 3003 Aluminum Alloy Roll Bond Evaporators (Al-Mn Alloy Inflated Cooling Panels & Wrap-Around Freezer Liners) engineered specifically for commercial and domestic chest freezers, deep-freeze storage cabinets, ice cream dipping freezers, island merchandisers, and ultra-low temperature medical chest freezers (cooling capacities engineered from 120 W to over 1,200 W for temperatures down to −35∘C). Utilizing manganese-alloyed AA3003 aluminum alloy sheets, our roll bond chest freezer evaporators deliver >25% higher mechanical tensile strength and superior puncture resistance compared to standard 1050/1060 pure aluminum, easily withstanding heavy frozen food impacts and mechanical ice scraping. Available as Single-Side Flat Wrap-Around Liners (creating a 4-sided seamless internal freezer cavity), Flat Contact Bottom Plates, and Double-Side Inflated Shelves, our AA3003 evaporators feature friction-welded copper-aluminum (Cu-Al) connector stubs, integrated liquid accumulators, and food-grade anti-corrosion powder coating / embossed finishes. CSTHEATEXCHANGER 3003 roll bond panels deliver burst pressures >5.5 MPa, ultra-clean internal channels (<15 mg/m2) optimized for R290 Propane, R600a Isobutane, and R134a, ensuring uniform −18∘C to −35∘C freezing with zero thermal dead zones.
Chest freezers present harsh operating environments: heavy frozen meat cartons, sharp ice blocks, and manual frost scraping create severe mechanical stress on internal cooling walls. CSTHEATEXCHANGER specifies AA3003 Aluminum-Manganese alloy:
AA3003 ALLOY ROLL BOND METALLURGY FOR CHEST FREEZERS
======================= AA3003 (Al-Mn 1.2%) ALLOY PROFILE =======================
• Enhanced Tensile Strength: 140 - 180 MPa (vs. 85 - 110 MPa for AA1050/AA1060)
• High Puncture & Dent Resistance against frozen food cartons and ice scrapers
• Superior Corrosion Resistance against food acids, salt brine, and moisture
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┌────────────────────────────────────────────────────────────────────────────┐
│ CSTHEATEXCHANGER® SOLID-STATE HOT-ROLL BONDING & PNEUMATIC INFLATION │
│ • Screen-Printed Anti-Weld Circuit Matrix (Multi-Pass Low Pressure Drop) │
│ • High-Tonnage Rolling Fusion + High-Pressure Die Blowing (> 14 - 18 MPa) │
│ • Integrated Accumulator Volume Chamber (Prevents Liquid Slugging) │
└─────────────────────────┬──────────────────────────────────────────────────┘
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┌────────────────────────────────────────────────────────────────────────────┐
│ ADVANCED 3D FORMING & HYGIENIC SURFACE PROTECTION │
│ ┌────────────────────────┐ ┌────────────────────────┐ ┌──────────────────┐ │
│ │ 4-SIDED WRAP-AROUND │ │ SINGLE-SIDE FLAT PANEL │ │ Cu-Al FRICTION │ │
│ │ Seamless freezer box │ │ Smooth easy-clean wall │ │ Sealed transition│ │
│ └────────────────────────┘ └────────────────────────┘ └──────────────────┘ │
└────────────────────────────────────────────────────────────────────────────┘================================================================================
AA3003 ALLOY VS. STANDARD AA1050 / AA1060 IN CHEST FREEZER EVAPORATORS
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Engineering Parameter Standard AA1050 / AA1060 Pure Al CST AA3003 Aluminum-Manganese Alloy
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Tensile Strength (Rm) 85 - 110 MPa (Soft / Easily Dented) 140 - 180 MPa (High Impact Resistance)
Yield Strength (Rp0.2) 35 - 50 MPa 115 - 145 MPa (> 200% Higher Rigidity)
Brinell Hardness (HB) 20 - 28 HB (Prone to Scratches) 35 - 45 HB (Resists Ice Scraper Damage)
Channel Burst Pressure Rating 3.5 - 4.5 MPa > 5.5 to 7.0+ MPa (High Burst Safety)
Corrosion Resistance in Brine Moderate (Pitting Risk) Superior (Manganese Grain Passivation)
Formability for 4-Sided Bending Moderate (Prone to Micro-Cracks)Excellent Ductility with Zero Micro-Fissures
Thermal Conductivity (k) 205 - 220 W/m·K 160 - 190 W/m·K (Optimized for Fast Pull-Down)
================================================================================In commercial chest freezers, dropped frozen meat cuts and ice buildup can dent or puncture soft pure aluminum plates. AA3003's manganese content (1.0% to 1.5% Mn) increases yield strength by over 200%, preventing channel collapse or wall punctures during heavy loading or aggressive manual defrosting.
Manganese reinforcement enhances the fatigue strength of the inflated channel walls, withstanding continuous thermal contraction and pressure cycling from eco-refrigerants like R290 Propane with burst margins exceeding 5.5 MPa.
CSTHEATEXCHANGER manufactures AA3003 roll bond evaporators in tailored forms to streamline chest freezer assembly:
CSTHEATEXCHANGER CHEST FREEZER EVAPORATOR CONFIGURATIONS
[1. 4-SIDED WRAP-AROUND SEAMLESS CAVITY LINER]
• A single large roll bond plate CNC-bent into a continuous 4-sided rectangular box.
• Surrounds the entire chest freezer cavity with continuous refrigeration channels.
• Eliminates internal tube joints and delivers 360° uniform deep freezing (-18°C to -35°C).
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[2. SINGLE-SIDE FLAT INNER WALL PANELS]
• 100% flat on the freezer interior face; inflated channels face the polyurethane foam.
• Provides a smooth, ultra-hygienic interior surface that is easy to wipe clean and defrost.
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[3. HEAVY-DUTY BOTTOM & SHELF CONTACT PLATES]
• Heavy-gauge AA3003 bottom contact evaporators for rapid freezing of dense food loads. 4-SIDED WRAP-AROUND ROLL BOND LINER VS. TUBE-ON-SHEET WRAP
[1] TRADITIONAL EXTERNAL COPPER/ALUMINUM TUBE-ON-SHEET WRAP
FREEZER CAVITY: ┌────────────────────────────────────────────────────────┐
TUBING: (O) (O) (O) (O) (O) (O) (O) (O) (O)
(Tangent line contact only; uneven temperature gradients; relies on tape/glue)
[2] CSTHEATEXCHANGER® INTEGRAL 3003 ROLL BOND WRAP LINER
FREEZER CAVITY: ══════════════════════════════════════════════════════════ <-- Smooth Flat Face
REFRIGERANT: ┌───────┐ ┌───────┐ ┌───────┐ ┌───────┐
│ R290 │ │ R290 │ │ R290 │ │ R290 │ <-- Integral Channel
└───────┘ └───────┘ └───────┘ └───────┘
(100% integral conductive heat transfer; 360° uniform cold wall; zero hot spots)================================================================================
CSTHEATEXCHANGER 3003 FREEZER PLATES VS. GENERIC ROLL BOND PANELS
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Engineering Feature Generic Roll Bond Evaporators CST 3003 Heavy-Duty Freezer Panels
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Alloy Chemistry & Purity Unspecified Scrap Aluminum Certified Virgin AA3003 (Al-Mn 1.2%)
Diffusion Rolling Reduction < 50% Reduction (Delamination) > 60% Heavy Roll Bonding (Zero Blistering)
Cu-Al Transition Joint Type Glued Swage (Prone to Leaks) Friction-Welded Solid Metallurgical Joint
Cu-Al Joint Corrosion Seal Bare / Single Tape Layer Double-Wall Polyolefin Heat-Shrink Sleeve
Integrated Suction Accumulator None (Requires External Canister)Integral High-Volume Formed Accumulator
Internal Channel Cleanliness > 30 mg/m² Residual Impurities Ultra-Clean < 15 mg/m² (R290/R600a Safe)
Surface Protection Options Thin Paint (< 30 µm) Food-Grade Epoxy Powder / Stipple Embossed
Salt Spray Rating (ASTM B117) < 96 Hours > 200 to 240+ Hours (Zero Corrosion)
================================================================================To ensure robust brazing to the condensing unit's copper suction lines without galvanic corrosion, every CSTHEATEXCHANGER 3003 plate integrates solid friction-welded Cu-Al connector stubs sealed with adhesive-lined polyolefin heat-shrink sleeves.
During heavy pull-down or after opening the chest freezer lid, unevaporated liquid refrigerant can return toward the compressor. Our roll bond circuit integrates an expanded accumulator bulb directly into the return channel, trapping liquid and allowing only dry vapor to reach the compressor.
(Note: The following engineering parameters represent standard manufacturing design envelopes. Sheet dimensions, wrap-around box dimensions, channel circuits, and connector stubs are tailored to OEM chest freezer drawings.)
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CSTHEATEXCHANGER 3003 ROLL BOND FREEZER EVAPORATOR (CST-RBF-3003 SERIES)
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Engineering Parameter Standard Manufacturing & Design Range
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Cooling Capacity Rating 120 W to 1,200+ W per evaporator (Customizable)
Target Freezing Appliance Chest Freezers, Deep Freezers, Ice Cream Freezers, Island Cases
Operating Temperature Range -18°C to -35°C (-40°C Deep Freezing Envelope)
Refrigerant Compatibility R290 (Propane), R600a (Isobutane), R134a, R404A, R452A
Base Material Alloy High-Grade Virgin Aluminum Alloy AA3003 (Al-Mn 1.0 - 1.5%)
Finished Plate Thickness 1.2 mm to 2.2 mm (Heavy Gauge for High Structural Rigidity)
Channel Inflation Profile Single-Side Flat (Smooth Interior Face) or Double-Side
Forming & Bending Formats Flat Panels, U-Shape, C-Shape, 4-Sided Wrap-Around Box Liners
Bending Corner Radius R5 mm to R25 mm (Precision CNC Bending Without Channel Collapse)
Copper-Aluminum Transition Stub Solid Friction-Welded Cu-Al Stubs (Ø 6.0 mm, 6.35 mm [1/4"], 8.0 mm)
Surface Finish Options Food-Safe Epoxy Powder (White/Silver), Stipple Embossed, Anodized
Coating Thickness & Adhesion 60 to 90 µm (Cross-Hatch Adhesion ISO 2409 Class 0)
Salt Spray Corrosion Rating > 200 to 240+ Hours ASTM B117 Neutral Salt Spray (Zero Blisters)
Internal Residual Cleanliness < 15 mg/m² Residual Impurities; Residual Moisture < 10 mg/m²
Design & Burst Pressures Operating Pressure: 1.8 - 2.8 MPa | Burst Pressure: > 5.5 MPa
Leakage Verification Standard 100% Mass Spectrometer Helium Leak Testing (< 1x10⁻⁶ mbar·l/s)
Food Safety & Environmental FDA, LFGB Food Contact Safe, RoHS, REACH, ISO 9001:2015
================================================================================AA3003 aluminum alloy contains approximately 1.2% manganese, providing significantly higher tensile strength (140 to 180 MPa) and surface hardness. In chest freezers where heavy frozen items are dropped into the cabinet and users scrape ice buildup with scrapers, AA3003 resists denting, channel collapse, and puncture leaks far better than pure 1050/1060 aluminum.
A 4-sided wrap-around roll bond liner forms the entire interior refrigerated compartment from a single pre-bent aluminum panel. This eliminates internal copper pipe joints, reduces manual assembly labor on the OEM factory line, ensures 360∘360∘ uniform cold distribution, and prevents temperature stratification inside the freezer.
Yes. CSTHEATEXCHANGER applies food-grade, non-toxic electrostatic epoxy powder coatings or embossed finishes compliant with FDA, LFGB, and RoHS regulations. The coating provides a clean, non-porous barrier that prevents aluminum oxidation from salt brine or food moisture and allows effortless wiping and defrosting.
Achieve rapid deep-freezing pull-down, high impact durability, and leak-free reliability with CSTHEATEXCHANGER:
Custom 3003 Aluminum Alloy Roll Bond Evaporators (120 W to 1,200 W+)
4-Sided Seamless Wrap-Around Liners, Flat Wall Panels & Heavy Bottom Plates
Solid Friction-Welded Copper-Aluminum (Cu-Al) Stubs with Dual Heat-Shrink Seals
Food-Grade Non-Toxic White Epoxy Powder Coating (>240 Hours Salt Spray Protection)
100% Helium Vacuum Leak Tested & Optimized for Low-Charge R290 and R600a
Custom Tooling, CNC 3D Bending, 2D/3D CAD Engineering & Factory-Direct Global Supply
Contact our specialized commercial and domestic refrigeration engineering team today with your chest freezer interior cavity dimensions, target freezing temperature (−18∘C−18∘C to −35∘C−35∘C), bending drawings, and capillary tube specifications for customized engineering proposals and factory-direct quotations.
Website: https://www.cstheatexchanger.com/
Technical Inquiries: info@cstheatexchanger.com
