Technical Product Brief: Copper-Clad Steel Strip H90/F18/H90 Brass Steel Strip (3.1mm)

Product Overview
The H90/F18/H90 copper-clad steel strip is a high-performance bimetal composite material with dual-sided H90 brass (C22000, Cu 88–91%, Zn balance) cladding on F18 deep-drawing steel substrate (C 0.11–0.19%, Mn 0.35–0.55%). With a thickness of 3.1mm, it combines copper’s conductivity/corrosion resistance and steel’s mechanical strength. Compliant with international standards (ASTM B152, IEC 61238) and Chinese GB/T 26015-201057.

Key Specifications

1. Mechanical Properties

• Tensile Strength: 305–400 MPa (half-hard, annealed)

• Elongation: ≥32%

• Bendability: Enhanced post-annealing, suitable for multi-stage cold forming14.

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3. Geometric Tolerances

• Thickness: 1.7-2.9，3.0，3.1，3.2，4.0mm (±0.08mm)

• Width: 450–600mm (master coil), customizable slitting to 81–139.5mm

• Clad Layer Thickness: 3.4–4% per side (total thickness), optimizing conductivity and corrosion resistance39.

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5. Chemical Composition

• Substrate (F18 Steel): C≤0.19%, Mn 0.35–0.55%, Al 0.02–0.08%, S/P≤0.07%48.

• Cladding (H90 Brass): Cu 88–91%, Zn balance (C22000 compliant)34.

Process Advantages
Utilizes 8–12 precision steps: surface pretreatment→cold rolling bonding→intermediate annealing→precision thinning→diffusion heat treatment→inspection. Ensures interfacial bond strength of 31–40 kg/mm², certified by RoHS68.

Applications

• Electrical & Electronics: Terminal connectors, conductive shims (IEC 60947 compliant);

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• New Energy Vehicles: Battery connectors, EMI shielding components;

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• Industrial Manufacturing: Deep-drawn stamping parts (draw ratio≥2.5), electromagnetic shielding;

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• Power & Energy: Grounding materials (DL/T 1312-2023 compliant for Cu layer thickness & thermal stability)7910.

Certifications

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• RoHS Directive (heavy metal restrictions);

• Material COC and third-party test reports (SGS)