Corrosion-resistant rolls for demanding environments.
When corrosion and cleanliness are critical, our 420 stainless steel overlay rolls provide robust heat transfer performance. The high-carbon martensitic stainless steel surface offers hardness around 50 HRC and good corrosion resistance, making it ideal for food contact, chemical processing and high-hygiene applications.
When to choose this roll
- When your coolant or product is corrosive (e.g., acids, alkalis, cleaning agents).
- When you require food-grade or hygienic surfaces.
- When high surface hardness improves wear life.
- When regulatory compliance (FDA or USDA) necessitates stainless surfaces.
- When frequent cleaning is part of your process.
How it works
The roll is built from a carbon or alloy steel core for strength and thermal conductivity, then clad with a thick layer of 420 stainless steel via mechanical bonding or welding. This overlay provides a hard, corrosion-resistant exterior while retaining the core’s heat transfer efficiency. The roll can be fabricated as a single-shell or double-shell design with spiral baffles to suit your heating or cooling needs.
Where it pays off / Applications
Food processing equipment, beverage and dairy lines, pharmaceutical and cosmetics production, packaging film lines requiring hygiene, and chemical plants handling aggressive fluids.
Specifications / Capabilities
Diameter: up to 48 in.
Length: up to 240 in.
Weight: up to 18,000 lbs.
Overlay thickness: typically 0.12-0.24 in.
Surface hardness: ≈50 HRC after heat treatment.
Surface finish: polished to Ra ≤ 32 µin or as specified.
Pressure rating: specified according to applicable ASME BPVC requirements and operating conditions.
Compliance & options
Can be manufactured to applicable ASME BPVC requirements when used as heating or cooling rolls and when pressure-containing design requirements apply. Food-contact versions can be specified to support applicable FDA food-contact requirements and sanitary design requirements. Optional surface finishes include mirror, satin or textured.
