In high-temperature electronics (150°C+), standard brass and phosphor bronze fail due to Stress Relaxation—they lose their clamping force, leading to signal loss or overheating.

To ensure long-term reliability, engineers must upgrade to high-performance copper alloys. Here is a concise guide to the top 4 contenders.

Top 4 Copper Alloys for 150°C+ Applications

1. Beryllium Copper (BeCu - C17200)
Performance: Retains 85%–90%+ stress after 1,000h at 150°C (up to 200°C).
The Edge:Ultimate tensile strength (>1200 MPa) + reliable elasticity.
Best For: Automotive ECU connectors & aerospace switches.

2. Titanium Copper (TiCu - C1990)
Performance: Exceptional heat resistance rivaling BeCu at 150°C.
The Edge: Completely Beryllium-free for strict environmental mandates.
Best For:Premium consumer electronics & advanced auto sensors.

3. Corson Alloy (Cu-Ni-Si - C7025)
Performance: Retains ~80% of its initial stress at 150°C.
The Edge: The ROI champion. Offers balanced strength and conductivity at a competitive cost.
Best For: Mass-produced automotive terminals & relay springs.

4. Chromium Zirconium Copper (CrZrCu - C18150)
Performance: Incredible thermal stability (softening point >450°C).
The Edge:Ultra-high conductivity (>80% IACS) to minimize self-heating.
Best For:EV charging pins & high-power contacts.

150°C Performance Benchmark (After 1,000 Hours)

Brass (C2680): Retains <30% stress | ~28% IACS conductivity. (Verdict: Fail. Room-temp only.)
Phosphor Bronze (C5210): Retains ~50% stress | ~11% IACS conductivity. (Verdict: High Risk. Low-temp only.)
Corson Alloy (C7025):Retains ~80% stress | ~40% IACSconductivity. (Verdict: Good. Cost-effective auto choice.)
Titanium Copper (C1990): Retains ~85% stress | ~13% IACSconductivity. (Verdict: Great. High-strength, Be-free.)
Beryllium Copper (C17200):Retains >85%stress | ~22% IACSconductivity. (Verdict: Excellent. Ultimate benchmark.)
Chromium Zirconium (C18150): Retains >80%stress | >80% IACSconductivity. (Verdict: Excellent. High-current king.)

Summary: How to Choose

1. BeCu:For ultimate fatigue life, miniaturization, and maximum spring retention.
2. Titanium Copper:For BeCu-level strength under strict "Beryllium-Free" regulations.
3. Corson Alloy:For high-volume automotive parts balancing cost and 150°C stability.
4. CrZrCu:For high-power EV applications where minimizing heat generation is critical.

Need technical data sheets or custom material samples for your next high-temperature project? Contact our engineering team today.