To be a valuable global supplier
for metallic honeycombs and turbine parts
Both look like catalytic converters. Both have honeycomb and a shell. But one is a single piece of metal. The other is a bunch of pieces stuck together.
When it comes to durability, they're not even close.
What "Integral Welded" Means
The core and the shell are one piece. No seams. No bolts. No glue. The metal is fused together – vacuum brazed or friction stir welded – into a single unit.
No extra connections. No places for things to work loose.
What "Assembled Split" Means
Core and shell are made separately. Then joined. Welded, bolted, or glued. The shell itself might be multiple pieces.
Every joint is a potential failure point.
The Numbers
Welded joints are ten times stronger than glued joints.
Welded honeycomb has 32‑37% higher crush strength than bonded.
Welded honeycomb has 80‑84% higher energy absorption.
That's not a small gap. That's a completely different league.
Why Welded Holds Up
No adhesive to degrade. Adhesives don't like heat. They don't like moisture. They don't like thermal cycling. They get brittle, crack, lose grip.
No extra seams for exhaust to leak through. The shell is continuous. Nothing to loosen over time.
Stress spreads evenly across the whole structure. No weak spots where things can start to fail.
Why Assembled Struggles
Multiple parts means multiple joints. Each joint is a place where vibration works, corrosion starts, or leaks develop.
If there's adhesive, it ages. Heat and chemicals break it down. Bonded honeycomb shows adhesive failure in crush tests – the glue lets go before the metal does.
The shell joints are also weak points. Exhaust gas can find its way through. Corrosion hits the seams first.
What That Means in Real Life
A welded DOC metal substrate can take more vibration. More heat cycles. More abuse.
An assembled DOC might pass the test when it's new. Six months down the road? Things start to loosen up.
If your equipment shakes, runs hot, or sees long service hours, the welded design is the safer bet.
Bottom Line
Integral welded DOC: single piece, no glue, no seams, stronger joints, better crush strength, higher energy absorption.
Assembled split DOC: multiple pieces, joints, adhesives, lower strength, more failure points.
The numbers are clear. Welded joints are ten times stronger. Crush strength is 32‑37% higher. Energy absorption is 80‑84% higher.
If you need a DOC metal substrate that lasts, welded is the only choice.
We make integral welded DOC metal substrate. That's what we do.