Food-grade stainless steel is any steel alloy verified safe for prolonged contact with food and beverages — typically 304 (18% chromium, 8% nickel) or 316 (with added molybdenum). It doesn't leach chemicals, doesn't react with acids, and resists corrosion. For water bottles in India, BIS IS 17526:2021 certification verifies food-grade material use.
Key Facts
- Food-grade = alloy verified safe for prolonged food/drink contact.
- 304 (18/8) is the standard; 316 is a marine-grade upgrade.
- Non-reactive with acids, juices, coffee, hot drinks.
- BIS IS 17526:2021 verifies food-grade material for Indian vacuum bottles.
- HYV uses food-grade 304 stainless steel with double-wall vacuum insulation for verified hot/cold retention.
What food-grade means
The alloy has been tested and certified safe for the pH range, temperatures and contact durations typical of food and drink storage.
The common food-grade steels
- 304 (18/8): the standard for water bottles.
- 316: adds molybdenum for extra corrosion resistance — marine environments.
- 430: lower grade, sometimes used for cheap bottles.
How to verify
BIS mark on the bottle or packaging. Marketing text alone isn't proof.
Frequently Asked Questions
What makes stainless steel food-grade?
The alloy composition, verified safe for food contact — typically 304 or 316.
Is all stainless steel food-grade?
No — lower grades exist. Look for 304 or 316 explicitly.
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