316 Stainless Steel

Our Engineering: 304 & 316 Stainless Steel

At Andes Hot Tubs, we do not build temporary showroom appliances out of short-lived plastics, acrylics, or vinyl. We build permanent outdoor architecture.

The core of every Andes hot tub is crafted from solid, structural stainless steel. Whether you choose our robust 304 Classic Grade or our upgraded 316 Marine-Grade, you are investing in a material choice rooted in a single philosophy: your hot tub should look, feel, and perform flawlessly for a lifetime.

Choosing Your Grade

Both options are premium, industrial-grade metals engineered to survive the elements far better than traditional spa materials. The choice between them simply comes down to your property's location and your chosen heating system.

304 Classic Grade: The Outdoor Standard

Our 304 stainless steel is the backbone of our classic wood-fired line. It is incredibly tough, highly resistant to rust, and built to handle the intense thermal cycles of traditional wood-fired soaking.

  • Found In: Our Classic Wood-Fired Range.
  • Best Suited For: Rural, suburban, and mountain landscapes.
  • Water System: Fresh water, pure wood-fired rituals.
  • The Verdict: If your hot tub is destined for a beautiful suburban garden, a mountain retreat, or a rural paddock using fresh water fills, 304 stainless steel offers phenomenal longevity and rugged architectural beauty.

316 Marine-Grade: The Coastal Upgrade

For our Hybrid Tech line, we upgrade the steel core to 316 marine-grade. By introducing an element called molybdenum into the alloy, this steel is specifically armored against the harshest environments.

  • Found In: Our Hybrid Tech Range.
  • Best Suited For: Coastal properties exposed to windswept salt air.
  • Water System: Integrated automation, pool chemicals, and continuous filtration.
  • The Verdict: If you live within sight or smell of the ocean, or if you are running a fully automated, continuously heated hybrid system over time, the 316 upgrade provides maximum peace of mind against microscopic pitting and chemical wear.

Shared Benefits of an Andes Steel Core

No matter which grade suits your lifestyle, every Andes stainless steel shell delivers a level of luxury and durability that conventional hot tubs cannot match:

1. Architectural Permanence

Conventional plastic, fiberglass, or acrylic spa shells inevitably degrade under the harsh Australian sun—they fade, blister, and crack. Our stainless steel shells are 100% UV-impervious, retaining their structural integrity and refined look forever.

2. Effortless Hygiene & Care

Stainless steel is naturally non-porous. Unlike porous plastics or raw wooden interiors, bacteria and biofilm have nowhere to hide. This means your tub easily wipes clean and requires significantly less chemical maintenance to keep the water crystal clear.

3. Thermal Efficiency

When paired with our high-density insulation and certified sustainable cedar cladding, the heavy-duty steel core acts as an exceptional thermal mass. It locks in heat far longer than thin plastic shells, lowering your reheating times and energy use.

An Investment in Permanence: Choosing stainless steel means placing a substantial feature into your landscape with absolute confidence. Whether you choose the rugged reliability of our 304 Classic or the advanced resilience of our 316 Marine-Grade, you are choosing a tub that is built to stay.