Why is 304 the most used stainless steel grade?

Q1: Why is 304 the most used stainless steel grade?

304 dominates industrial applications due to its optimal cost-performance balance: 18% chromium provides robust corrosion resistance through a self-healing oxide layer, while 8% nickel ensures superior formability and weldability. It outperforms 430 in toughness and avoids 316’s 25% cost premium where molybdenum isn’t critical.

Deep Dive:

In acidic environments like dairy processing, 304’s passive layer reforms after cleaning cycles, preventing pitting. Its elongation allows deep drawing into sinks or tanks without cracking. While coastal projects require 316L, 304 remains the default for HVAC, fasteners, and kitchen equipment, saving over $300-400/tonne without sacrificing hygiene or durability.