Introduction

In the world of metal honeycomb manufacturing, selecting the right joining technique is crucial for mechanical strength, EMI shielding, heat resistance, and durability. The two most common methods are spot welding and brazing, each with its own advantages.

This article explores the differences between spot welding and brazing, their applications, and which one is better for metal honeycomb structures.

1. What is Spot Welding? 🔩

🔹 How It Works

Spot welding (resistance welding) uses high electrical current to heat and fuse two metal sheets at specific "spots," creating a series of weld points.

🔹 Key Features

✅ High-speed process – Faster than brazing
✅ Strong localized welds – Good mechanical strength
✅ Cost-effective – Requires less energy and filler materials
✅ Suitable for stainless steel, aluminum, and nickel alloys

🔹 Limitations of Spot Welding

🚫 Not completely sealed – Small gaps between weld points may lead to EMI/RF leakage
🚫 Lower corrosion resistance – Potential weak points in extreme conditions
🚫 Limited thermal durability – Typically withstands 600-800°C

🔹 Applications of Spot Welding

✔ General metal honeycomb structures
✔ Automotive and aerospace components
✔ Wind tunnel flow straighteners

2. What is Brazing? 🔥

🔹 How It Works

Brazing involves heating metal components to 800-1200°C and applying a filler metal (nickel, silver, or copper-based alloys) to create a strong, continuous joint.

🔹 Key Features

✅ Seamless & airtight joints – Ideal for EMI shielding & RF applications
✅ Superior strength – Can withstand high temperatures (1000-1200°C)
✅ Corrosion-resistant – Suitable for harsh environments
✅ Compatible with various materials – Works well with stainless steel, nickel alloys, and Hastelloy

🔹 Limitations of Brazing

🚫 Slower process – Requires precise temperature control
🚫 Higher cost – Uses filler metals, making it more expensive
🚫 May require post-processing – Cleaning and polishing for high-end applications

🔹 Applications of Brazing

✔ High-performance metal honeycomb seals
✔ EMI shielding panels & RF shielding vents
✔ Gas turbine & aerospace components

3. Spot Welding vs. Brazing: Key Differences

4. Which is Better for Metal Honeycomb Structures?

📌 If EMI shielding & RF protection are priorities → Brazing is better
📌 If you need high-temperature resistance (1000°C+) → Brazing is superior
📌 If cost and speed matter more → Spot welding is the economical choice
📌 For aerospace, military, or gas turbine applications → Brazing ensures long-term durability

🚀 For high-performance honeycomb structures, brazing is the preferred choice.

5. Why Choose Our Metal Honeycomb Products?

At HengShi (langfang) Precision Machinery Manufacturing Co., Ltd, we specialize in high-performance metal honeycomb cores, honeycomb seals, and EMI shielding solutions, offering:

✅ Customizable Spot-Welded & Brazed Honeycomb Structures
✅ Stainless Steel, Nickel Alloy, Copper & Hastelloy Materials
✅ Optimized for Aerospace, Automotive, EMI Shielding & Wind Tunnel Applications
✅ ISO-Certified Quality Manufacturing

📞 Contact us today for a custom quote!

📧 Email: bill.fu@hengshi-emi.com
🌍 Website: www.hihoneycomb.com