- Penerangan
304 Stainless Bar vs 316 Bar Tahan Karat: Key Differences and Performance Comparison
304 stainless bar and 316 stainless bar are two of the most widely used austenitic stainless steel materials in industrial applications. They share similar mechanical strength and formability, but differ significantly in corrosion resistance due to their alloy composition.
Understanding the difference between these two grades helps engineers and buyers select the right material for cost, ketahanan, dan keadaan persekitaran.
1. Perbandingan Komposisi Kimia
| unsur | 304 Bar Tahan Karat | 316 Bar Tahan Karat | Perbezaan Utama |
|---|---|---|---|
| Chromium (Cr) | 18.0 – 20.0% | 16.0 – 18.0% | Slightly higher in 304 |
| Nikel (Dalam) | 8.0 – 10.5% | 10.0 – 14.0% | Higher in 316 |
| Molibdenum (Mo) | tiada | 2.0 – 3.0% | Key advantage of 316 |
| Karbon (C) | ≤ 0.08% | ≤ 0.08% | serupa |
2. Prestasi Rintangan Kakisan
The most important difference between 304 dan 316 stainless bar is corrosion resistance, terutamanya dalam persekitaran klorida.
- 304 Bar Tahan Karat: Good corrosion resistance in general atmospheric and indoor environments
- 316 Bar Tahan Karat: Excellent resistance to seawater, salt spray, and chemical exposure
The addition of molybdenum in 316 significantly improves resistance to pitting and crevice corrosion.
3. Perbandingan Sifat Mekanikal
| Harta benda | 304 Bar Tahan Karat | 316 Bar Tahan Karat |
|---|---|---|
| Kekuatan Tegangan | 515 – 750 MPa | 515 – 750 MPa |
| Kekuatan Hasil | ~205 MPa | ~205 MPa |
| Pemanjangan | ~40% | ~40% |
Both materials have similar mechanical strength, making corrosion resistance the main selection factor.
4. Application Environment Difference
- 304 Bar Tahan Karat: Struktur dalaman, peralatan makanan, general machinery, kegunaan seni bina
- 316 Bar Tahan Karat: Kejuruteraan marin, pemprosesan kimia, peralatan perubatan, coastal construction
5. Perbandingan Kos
304 stainless bar is more cost-effective due to the absence of molybdenum and lower nickel content. 316 stainless bar is more expensive but provides superior performance in harsh environments.
- 304: Economical and widely available
- 316: Kos yang lebih tinggi, rintangan kakisan yang lebih tinggi
6. How to Choose Between 304 dan 316 Bar Tahan Karat
The selection depends mainly on the working environment:
- If the environment is dry or mildly corrosive → choose 304
- If exposed to seawater, salt, or chemicals → choose 316
- If long-term durability is critical → 316 is preferred
7. Keupayaan Bekalan Perindustrian
Dalam rantaian bekalan keluli tahan karat global, Teda Ganghua provides both 304 dan 316 stainless bars with stable chemical composition, precise dimensional control, and export-grade packaging for industrial applications.
This allows customers to select the most suitable grade based on performance requirements and cost optimization.
Soalan Lazim
1. Which is better, 304 atau 316 bar keluli tahan karat?
316 is better in corrosion resistance, sementara 304 is more cost-effective for general use.
2. kenapa 316 more expensive than 304?
Because it contains molybdenum and higher nickel content, which improves corrosion resistance.
3. boleh 304 stainless bar be used outdoors?
ya, but it is less suitable for coastal or high-chloride environments.
4. Adakah 316 keluli tahan karat lebih kuat daripada 304?
Their mechanical strength is similar; the main difference is corrosion resistance.
5. Does Teda Ganghua supply both 304 dan 316 stainless bars?
ya, Teda Ganghua supplies both grades with stable quality and export-ready packaging.
