Short answer: stainless steel lasts longer. Every HeatMaster is built from 409 titanium-enhanced stainless steel.
Why 409 stainless
- Doesn't rust like mild steel. Mild steel starts rusting from day one. Stainless has a protective layer that keeps rust out.
- Takes more heat. 409 stainless handles up to 1,400°F. The mild steel used in boilers starts breaking down around 800°F.
- Moves heat just as well. Stainless doesn't need to be as thick, so it transfers heat about as well as mild steel.
- Handles wear and temperature swings. The titanium makes it tougher.
- Doesn't warp or crack. 409 expands very little, unlike 304 stainless, which can warp and crack.
That's why more brands are switching from mild steel to stainless.