Copper Sheet Strip Supplier | High Conductivity & Precision

If you work in power electronics, HVAC, or precision stamping, you’re already on a first‑name basis with Copper Sheet Strip. I’ve toured a few mills this year, and—honestly—the buzz around tighter tolerances and cleaner edges is real. HEBEI WINDZONE (Copper Foil / Sheet / Bar) out of Room 905 BLDG. A, No. 363 Tiyu South St., Yuhua Strict Shijiazhuang Hebei, keeps coming up in buyer shortlists, which is why I took a closer look.

What makes Copper Sheet Strip competitive now

Two themes: electrification and miniaturization. EV busbars, EMI/RFI shielding, and switchgear want conductivity near 100% IACS with burr-free slitting. Meanwhile, heat spreaders for servers are asking for thinner gauges without losing flatness. Many customers say they’re switching to slit-to-width coils to cut scrap; it seems that the economics finally favor precision over rough trimming.

Typical specifications

Process flow (how your Copper Sheet Strip is made)

Materials: cathode copper ≥99.90%. Methods: hot rolling → pickling → cold rolling (multi-pass) → annealing (bright or box) → tension leveling → precision slitting → degreasing → packaging with VCI.

Testing: thickness/width (laser), hardness (ASTM E18), tensile (ASTM E8), conductivity (ASTM B193), grain size (ASTM E112), and surface defect inspection. Certifications: ISO 9001; RoHS/REACH statements available.

Service life: around 15–30 years in indoor electrical use; outdoor service depends on atmosphere and coating (patina can be desirable for architecture).

Where it’s used

• Busbars, switchgear, and transformer windings
• EMI/RFI shielding, battery tabs, and grounding straps
• Heat spreaders, vapor chamber lids, server thermal plates
• Roofing flashings, decorative panels, and precision shims

A recent lab lot I saw tested at 100.2% IACS, ±0.02 mm thickness on 0.5 mm stock, and Ra ≈ 0.6 μm after final pass—quite good for repeatable solder wetting.

Vendor comparison (quick take)

Customization and real projects

Options: edge deburr (square, rounded), anti-tarnish coating, peelable film, coil OD/ID per line spec, slit camber control, and temper tuning for bend radii. Actually, the peelable film saves rework on brushed-finish panels—small thing, big difference.

Case 1: An EV inverter maker moved to Copper Sheet Strip C110 1/2H, 2.0×60 mm busbar strip; they reported a 12% drop in joint resistance variation and faster assembly due to consistent burr control.

Case 2: An HVAC coil builder used 0.1 mm OF copper foil for brazed fins; porosity rejects fell by ~18% after surface cleanliness and anneal adjustments. Feedback was basically, “less scrap, fewer surprises.”

If you need datasheets or third‑party test reports, ask for ASTM B193 conductivity curves and EN 1652 certificates. And yes, they can ship mixed pallets of sheet, foil, and bar—useful when prototyping.

Citations

1. ASTM B152/B152M – Standard Specification for Copper Sheet, Strip, and Plate.
2. EN 1652 – Copper and copper alloys: Plate, sheet, strip, and circles for general purposes.
3. ASTM B193 – Standard Test Method for Resistivity of Electrical Conductor Materials.
4. Directive 2011/65/EU (RoHS) – Restriction of Hazardous Substances.
5. Copper Development Association (CDA) – C11000 properties and IACS reference.