Choosing the right material for an industrial scale is more than a technical detail – it determines how long the equipment will perform reliably under real working conditions. Moisture, aggressive cleaning agents, and chemical exposure are daily realities in industries such as food processing, pharma, and logistics. If the wrong steel is used, corrosion, hygiene issues, and premature failures are inevitable.

Industrial scales are typically built from three types of material:

• Epoxy-coated steel – a carbon or alloy steel base protected by an epoxy resin layer. Affordable and sufficient for standard environments, but vulnerable once the coating is scratched or worn.
• AISI 304 stainless steel – an austenitic chromium-nickel alloy with good corrosion resistance, widely used in general-purpose applications.
• AISI 316 stainless steel – enriched with molybdenum, designed to resist chlorides, salts, and aggressive chemicals, making it the benchmark for waterproof and hygienic scales.

Epoxy-Coated Steel vs. AISI Stainless

Epoxy coatings provide a first line of defense but depend on surface integrity. In dry storage areas or basic logistics, this is often sufficient. However, once cracks, scratches, or chemical stress compromise the coating, the underlying steel is exposed and corrosion starts rapidly.

AISI stainless steels solve this differently: their resistance is built into the material itself. Even if the surface is damaged, the passive chromium oxide layer renews itself, ensuring long-term protection. This makes them far more reliable for scales that undergo daily washdowns, exposure to salts, or chemical cleaning routines.

What Does AISI Mean in Steel?

AISI stands for American Iron and Steel Institute. The system classifies steels by their chemical composition and properties. In particular, stainless steels have become internationally standardized under AISI – alongside European systems such as DIN and EN.

The most common series include:

• AISI 200 series: Austenitic chromium-nickel-manganese steels
• AISI 300 series: Austenitic chromium-nickel steels (304, 316, etc.)
• AISI 400 series: Ferritic and martensitic steels

For industrial scales, the most relevant grades are 304 and 316 from the 300 series.

Why the Steel Grade Matters for Waterproof Scales

Waterproof industrial scales are used wherever regular cleaning, high humidity, or exposure to aggressive substances is part of daily operations. Typical industries include:

• Food processing: meat, dairy, bakeries
• Pharma: sensitive production environments with strict hygiene standards
• Chemicals & logistics: harsh cleaners, outdoor use, or salt-rich air

The three key requirements are:

1. Corrosion resistance → protection against water, salt, and cleaning agents
2. Hygiene → smooth, easy-to-clean surfaces without material degradation
3. Durability → resistance to abrasion, temperature fluctuations, and chemicals

Choosing the wrong steel results in rust, reduced lifespan, and costly downtime

Comparison of the Most Relevant AISI Grades for Industrial Scales

AISI 304 vs. AISI 316: The Classic Comparison

• AISI 304: The reliable all-rounder. Best for environments that require hygiene but are not subject to extreme chemical or salt exposure – such as labs or dry food areas.
• AISI 316: The premium choice for wet, salty, or chemically aggressive environments. Thanks to its molybdenum content, it resists chlorides and harsh cleaning agents, making it the go-to option for meat processing, dairies, outdoor logistics, and chemical plants.

👉 In short:

• 304 = versatile & cost-efficient
• 316 = best choice for water, salt, and chemical exposure

Practical Use Cases

• Meat processing: Daily high-pressure cleaning with chlorine-rich detergents – only AISI 316 withstands this long-term.
• Outdoor logistics: Platform scales in coastal warehouses or harbors → AISI 316 is essential, as salty air corrodes 304.
• Laboratories & pharma: AISI 304 is often sufficient – hygienic, easy to clean, and cost-effective.

The choice of the right AISI grade has a decisive impact on the performance and service life of waterproof industrial scales. AISI 304 works as a versatile solution for standard environments, while AISI 316 offers the premium option whenever moisture, salt, or chemicals are involved. For highly demanding conditions, special alloys like 316L or 904L provide maximum safety even under extreme stress.

By selecting the appropriate AISI stainless steel, you ensure long-term measurement accuracy, compliance with hygiene standards, and minimized downtime.

By selecting the appropriate AISI stainless steel, you ensure long-term measurement accuracy, compliance with hygiene standards, and minimized downtime.