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Why Does My Stanley Say SUS 304?

Published in Stainless Steel Grade 2 mins read

Your Stanley product says "SUS 304" because it indicates the specific grade of stainless steel used in its construction, ensuring high quality, durability, and safety for consumer use.

Understanding SUS 304 Stainless Steel

When you see "SUS 304" stamped on your Stanley item, it refers to a particular type of stainless steel. SUS is a Japanese Industrial Standard (JIS) designation for stainless steel, with "304" being the specific grade. This grade is globally recognized and highly valued for its properties.

What is SUS 304?

  • Composition: SUS 304 stainless steel is an austenitic steel, meaning it contains a high percentage of chromium and nickel. Specifically, it's known as 18/8 stainless steel, indicating it contains approximately 18% chromium and 8% nickel.
  • Corrosion Resistance: The high chromium content forms a passive layer on the steel's surface, providing excellent resistance to rust and corrosion, even in diverse environments.
  • Durability: It is robust and resistant to impact, making it ideal for products designed for long-term use and active lifestyles, like Stanley''s vacuum bottles and food jars.
  • Food-Grade Quality: This grade is specifically considered food-grade Stainless Steel, meaning it is safe for contact with food and beverages. It does not leach harmful chemicals, alter the taste of contents, or react with acidic or alkaline substances commonly found in food.

Why Stanley Uses SUS 304 Stainless Steel

Stanley, known for its durable and reliable insulated products, chooses SUS 304 (or 18/8) stainless steel for several critical reasons:

  • Safety and Hygiene: As a food-grade material, it ensures that your drinks and food remain safe for consumption. Its non-porous surface also makes it easy to clean and resistant to bacterial growth, promoting better hygiene.
  • Longevity: The inherent corrosion resistance and strength of 304 stainless steel contribute significantly to the lifespan of Stanley products. This means your bottle or food jar can withstand years of use without degrading in quality or performance.
  • Thermal Performance: While the steel itself isn't an insulator, its robust nature allows for the creation of durable double-wall vacuum insulation, which is key to Stanley's ability to keep contents hot or cold for extended periods.
  • Consumer Trust: By using a widely recognized and trusted material like SUS 304, Stanley reinforces its commitment to quality and consumer well-being.

In essence, the "SUS 304" stamp on your Stanley product is a mark of quality, indicating that it's made from a premium, food-safe, and highly durable stainless steel designed for longevity and reliable performance.