Stainless steel is widely used across industries due to its corrosion resistance and durability. However,  different grades—such as 201 , 304, 316, and 430—vary in composition and performance, making them suitable for distinct applications. Below is a detailed comparison:

1. 201 Stainless Steel

.  Composition: Low nickel content (1-3%), higher manganese (5.5-7.5%), and chromium (16-18%). .   Key Features:

。 Moderate corrosion resistance (weaker than 304/316).

。 Cost-effective due to reduced nickel content.

。 Magnetic and less ductile.

.  Applications:

。 Indoor decorative items (e.g., trim, railings).

。 Low-budget cookware or appliances.

。 Dry environments where corrosion risk is minimal.

.   Limitations: Unsuitable for marine or acidic environments.

2. 304 Stainless Steel

.  Composition: 18% chromium, 8-10% nickel, and low carbon.

.   Key Features:

。 Excellent corrosion resistance (resists oxidation and organic acids). 。 Non-magnetic in annealed state, highly formable.

。 Industry-standard "food-grade" stainless steel.

.  Applications:

。 Kitchen equipment (sinks, utensils).

。 Architectural structures (exterior cladding).

。 Medical devices and chemical containers.

.   Limitations: Vulnerable to chloride-induced pitting (e.g., coastal areas).

3. 316 Stainless Steel

.  Composition: 16-18% chromium, 10-12% nickel, and 2-3% molybdenum. .   Key Features:

。 Superior corrosion resistance (especially against chlorides and acids). 。 Enhanced high-temperature strength.

。 Non-magnetic and highly weldable.

.  Applications:

。 Marine environments (ship components, offshore platforms).

。 Pharmaceutical and chemical processing equipment.

。 Coastal architecture (e.g., balconies, bridges).

.   Limitations: Higher cost due to molybdenum content.

4. 430 Stainless Steel

.  Composition: 16-18% chromium, no nickel, and high iron content.

.   Key Features:

。 Magnetic and less corrosion-resistant (prone to rust in humid/salty conditions). 。 Good heat resistance and oxidation resistance.

。 Low-cost alternative to austenitic grades.

.  Applications:

。 Automotive trim and exhaust systems.

。 Household appliances (e.g., washing machine drums).

。 Decorative items in dry indoor environments.

.   Limitations: Avoid use in wet or corrosive settings.

Key Differences Summary