When choosing between 304 stainless steel sheet and 316 stainless steel sheet, many buyers wonder: Which one should I use? Both grades are popular in construction, food processing, and industrial projects, but their composition and corrosion resistance differ significantly. Understanding these differences helps you pick the right material for your application.

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Chemical Composition

• 304 Stainless Steel Sheet:

  • Chromium: 18–20%

  • Nickel: 8–10.5%

  • Carbon: ≤ 0.08%

• 316 Stainless Steel Sheet:

  • Chromium: 16–18%

  • Nickel: 10–14%

  • Molybdenum: 2–3%

  • Carbon: ≤ 0.08%

Key Difference:
316 contains molybdenum, which significantly improves resistance to chlorides (saltwater, chemicals).

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Mechanical Properties

Conclusion:
Both grades are strong and durable, but 316 offers slightly higher tensile strength and better toughness in harsh environments.

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Corrosion Resistance

• 304 Stainless Steel Sheet: Excellent resistance in normal indoor and outdoor conditions. Susceptible to pitting corrosion in seawater or chloride-heavy environments.

• 316 Stainless Steel Sheet: Superior corrosion resistance due to molybdenum, especially in marine, coastal, and chemical applications.

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Applications

• 304 Stainless Steel Sheet Uses:

  • Kitchen equipment (sinks, countertops, appliances)

  • Food processing machinery

  • Architectural panels and railings

  • Automotive trim

• 316 Stainless Steel Sheet Uses:

  • Marine equipment and shipbuilding

  • Coastal architecture and outdoor furniture

  • Chemical processing plants

  • Medical implants and surgical instruments

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Price Comparison

• 304 stainless steel sheet is generally cheaper and widely available.

• 316 stainless steel sheet costs 20–30% more due to its molybdenum content, but the higher durability may lower long-term maintenance costs.

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FAQ

1. Which stainless steel sheet is better: 304 or 316?
316 is better for environments with saltwater, chemicals, or high corrosion risk. 304 is sufficient for most general uses.

2. Does 304 stainless steel rust?
It is rust-resistant but not fully rust-proof in chloride-rich conditions.

3. Why is 316 more expensive?
The addition of molybdenum and higher nickel content increases both corrosion resistance and price.

4. Can 304 and 316 stainless steel be welded?
Yes. Both grades have good weldability, though welding 316 requires slightly more control due to molybdenum.

5. Which one should I choose for outdoor use?
Choose 316 stainless steel sheet for coastal or harsh outdoor conditions; 304 is fine for urban and indoor applications.

The main difference between 304 and 316 stainless steel sheet lies in corrosion resistance and price:

• 304 stainless steel sheet: Affordable, versatile, ideal for kitchens, architecture, and general industries.

• 316 stainless steel sheet: Premium-grade, designed for marine, medical, and chemical environments.

If your project involves saltwater, chemicals, or heavy exposure to moisture, 316 is the better investment. For most other uses, 304 offers excellent value and performance.