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This Hemispherical Embossed Aluminum Coil Sheet is engineered specifically for automotive exhaust heat shield and insulation applications. The hemispherical embossing dramatically increases the surface area for enhanced heat dissipation, while retaining mechanical strength, corrosion resistance, and low weight. YUQI Metal supplies this product in multiple aluminum alloys suitable for vehicular heat management.
Hemispherical embossed pattern — increases surface area, improving heat transfer efficiency.
High strength & stiffness — embossing adds rigidity.
Lightweight & corrosion-resistant — ideal for automotive environments.
Excellent formability & processability — suitable for stamping, bending, trimming.
Wide alloy / thickness options — flexible for various vehicle models.
Stable performance & long service life — retains shape under heat cycles.
Excellent Heat Dissipation – quickly transfers engine heat outward, preventing overheating and improving engine reliability.
Superior Formability – easily processed into different shapes and sizes to fit various vehicle models.
High Stability – maintains mechanical properties and shape under long-term high-temperature service, ensuring durability.
Lightweight – reduces overall vehicle weight, lowering energy consumption and improving fuel efficiency.
At present, the aluminum alloy material automotive heat shield occupies a dominant position in the market, and its commonly used products include 1050, 1060, 1100, 3003, 3004, 5052, 5754, 5182 aluminum alloy, etc., the thickness range is between 0.12-1.5mm.
| Parameter | Range / Options | Notes |
|---|---|---|
| Alloy | 1050, 1060, 1100, 3003, 3004, 5052, 5754, 5182 | Common automotive aluminum grades |
| Thickness | 0.12 mm – 1.50 mm | Customizable per design |
| Surface | Hemispherical embossing (single / double) | Enhances thermal performance |
| Width / Coil | Custom width / Coil size | Depending on vehicle part dimensions |
Engine / Exhaust Heat Shields — shields underbody and exhaust pipes
Thermal Insulation Panels — reduces heat transfer to cabin or nearby parts
Engine Bay Covers & Guards
Underbody Undertray Insulation
Radiator / Turbo / EGR Shielding
YUQI Metal is a professional enterprise engaged in aluminum production, with advanced production technology and equipment, with rich experience in aluminum production. In order to meet the needs of the automotive manufacturing industry, YUQI Metal continues to develop innovations to provide specialized aluminum for automotive heat shields.
This section details the full production and processing steps of the Hemispherical Embossed Aluminum Coil Sheet for automotive exhaust heat shield / insulation use.
High-purity aluminum ingots or recycled aluminum with controlled impurity content are selected to ensure excellent thermal conductivity and corrosion resistance.
The ingots are melted in a furnace, processed to remove slag and gases, ensuring uniform chemical composition and minimal defects.
Molten aluminum is cast into slabs or billets (via continuous caster or ingot casting).
These slabs are sawed or cut to intermediate sizes for rolling.
Surface scalping is applied to remove surface defects and ensure a clean base for rolling.
The cut slabs undergo homogenizing heat treatment to relieve internal stresses and ensure uniform microstructure, improving subsequent rolling behavior.
The slab is first hot rolled to reduce thickness, improve ductility and grain structure.
Optionally, tandem mills are used for continuous thickness reduction.
Hot rolling helps in preparing the metal for subsequent embossing and shaping.
After hot rolling, the sheet may be cold rolled to reach precise thickness tolerances and improve surface finish and dimensional control.
Cold rolling also enhances mechanical strength via work hardening.
Using matched embossing dies or rollers, the flat sheet is formed into a hemispherical pattern (or other embossing types) to increase surface area, stiffness, and heat dissipation efficiency.
Embossing enhances rigidity and also helps reflect radiant heat more effectively.
The embossing depth, pitch, and layout are carefully controlled to avoid excessive thinning or stretch in critical areas.
After embossing, the coil is slit or cut to desired widths.
Then blanks (flat pieces) or shaped parts are cut via mechanical shearing, laser cutting, or stamping (blanking) according to the product design.
Sharp edges are deburred or smoothed to prevent damage or stress concentration.
In many applications, an annealing process is applied to relieve residual stress and restore ductility, which is critical for parts requiring tight forming or shape retention.
Annealing ensures the material can withstand heat cycling without cracking or distortion.
The embossed sheet may be cleaned, degreased, or chemically treated (e.g. phosphating, pickling) to improve adhesion for subsequent coating or finishing.
In some cases, the surface may be given a protective film or primer.
Every batch undergoes rigorous quality checks, including:
Thickness & dimensional uniformity
Embossing pattern consistency
Flatness and edge straightness
Mechanical properties (tensile strength, yield, elongation)
Surface appearance (no cracks, delamination, defects)
Thermal performance or reflectivity tests, if required
When feasible, simulation (e.g. in forming / crash forming) is used to reduce defects and optimize the embossing & forming steps.
The finished coils or sheets are carefully packed with moisture-proof wraps, padding, and strapped on pallets or in crates to protect during transport.
Proper labeling and documentation (Mill Test Certificates, inspection reports) accompany the shipment.
Logistics selection (sea, air, land) depends on the customer’s destination and urgency.
For automotive heat shield parts, support may include supply of blank shapes, CAD layouts, or assistance in forming / trimming during installation.
Recommendations for mounting, thermal isolators, fasteners, etc.
Custom Options: thickness, width, pattern depth, alloy, coil length
MOQ: (e.g. from 1 ton, based on spec)
Lead Time: stock items 7–12 days; custom orders 15–25 days
Packaging: moisture-proof wrap, strapped coils on pallets
Shipping Methods: sea, air, land
100% inspection on thickness, pattern depth, flatness
Supplied with Mill Test Certificate (MTC)
Optional certifications: ISO 9001, RoHS, ASTM
Performance testing under thermal cycling
A: Depending on design and performance needs, thickness often ranges from 0.12 mm to 1.50 mm, with embossing allowing enhanced performance even at thinner gauges.
A: Embossing increases surface area (improving heat dissipation), boosts stiffness, reduces wrinkling during forming, and enhances structural stability.
A: The hemispherical embossing increases surface area, boosting thermal radiation and convection, hence better cooling performance.
