One Fridge, Four Different Steels: Side Panel, Back Panel, Door and Liner

June 5, 2026 | Tech Notes

A side-by-side refrigerator uses at least four different steels from the inside out. Buy them all as one spec and you either waste money or build in a failure. Here is what goes where, and why.

Side panels: the volume workhorse, orange-peel embossed

The side panel is the largest visible part of a fridge, but it is not the face — it sits against the kitchen wall and is rarely looked at head-on.

Spec: 0.06–0.08 mm orange-peel embossed prepainted sheet, 18 μm topcoat
Why emboss: the emboss carries stiffness, so a thinner substrate does the same job — and the grain hides scratches and fingerprints
Color: white runs about 80%, any RAL on request

Orange-peel emboss grain close-up — The volume panel: the grain hides scratches and carries stiffness — the highest-volume sheet in the appliance trade

Door panels: the face of the unit, graded hardest

The door is the most visible square meter of the whole appliance. The customer looks at it every day.

Spec: velvet-texture (Moyuyan) or high-gloss white, film up to 25 μm and beyond
ΔE checked every batch: a door half a shade off reads instantly in a showroom
No flaking on the fold: the door is hemmed on all four sides, so film thickness and flexibility are hard requirements

Back panels: the invisible place to save

The back panel faces the wall and nobody ever sees it — but it sits against the foam and the compressor bay, so corrosion protection is not optional.

Spec: anti-fingerprint galvalume substrate with a deeper orange-peel emboss, 0.06–0.08 mm emboss on a 0.30 mm finished panel
The logic: emboss carries the stiffness so the substrate can go thinner; galvalume plus passivation handles rust; skipping the topcoat removes the paint cost entirely

Cut-to-length galvalume back panels stacked for shipment — Back panels cut to length and stacked for shipment — an invisible part, with no compromise on rust protection

Liners: the aluminum stand-in

Freezer liners were traditionally pure aluminum. More and more plants now run steel-clad aluminum — a high-zinc galvanized substrate hot-pressed with a high-purity aluminum skin.

0.15 mm liner-grade relief, micrometer-checked every batch
Looks like pure aluminum plate and drops straight onto existing liner lines
70%+ lower total cost, three-plus years proven in the market

Steel clad aluminum embossed surface — Steel-clad aluminum — looks like aluminum, costs like steel

The summary table

Part	Sheet	Emboss	Keywords
Side panel	Orange-peel prepainted	0.06–0.08 mm	Volume, material saving
Door	Velvet / high-gloss white	Optional	The face, color control
Back panel	Galvalume embossed	0.06–0.08 mm	Rust-proof, uncoated
Liner	Steel-clad aluminum	0.15 mm	Aluminum alternative, cost down

We make all four, and we quote against your whole BOM — sides, doors, backs and liners mixed in one container, ready for your line on arrival.

Quote My Whole BOM ← Back to News