진전
304 대 316 스테인레스 스틸: 튜브의 주요 차이점, 플레이트 및 바
304 그리고 316 are the two most popular grades of austenitic stainless steel. They look almost identical, but the addition of molybdenum in 316 makes a significant difference in corrosion resistance, especially in chloride and salt-water environments. This article explains the key differences between 304 그리고 316 stainless steel for tubes, plates and bars, and helps you decide which grade your project really needs.
304 대 316: 주요 차이점
| 목 | 304 | 316 |
|---|---|---|
| 크롬 (Cr) | 18.0 – 20.0% | 16.0 – 18.0% |
| Nickel (~ 안에) | 8.0 – 11.0% | 10.0 – 14.0% |
| Molybdenum (모) | None | 2.0 – 3.0% |
| 인장강도 | >= 515 MPa | >= 515 MPa |
| 항복 강도 | >= 205 MPa | >= 205 MPa |
| Chloride resistance | 좋은 | 훌륭한 |
| 상대 비용 | 낮추다 | 더 높은 (approx. 20-30%) |
| 일반적인 애플리케이션 | Food equipment, 주방 용품, 건축, general industry | 선박, 화학적인, pharmaceutical, 의료, offshore |
304 스테인레스 스틸: The General-Purpose Grade
304 is the most widely used stainless steel grade in the world. With 18% 크롬과 8% 니켈, it offers good corrosion resistance, excellent formability and weldability, and reliable mechanical properties with a tensile strength of at least 515 MPa. It performs well in atmospheric, food and mild chemical environments, which is why it dominates applications such as kitchen equipment, 식품 가공, beverage tanks, architectural decoration and general piping. For most indoor and general outdoor applications, 304 is the most cost-effective choice.
316 스테인레스 스틸: The Marine and Chemical Grade
316 adds 2-3% molybdenum to its chromium-nickel base, which dramatically improves resistance to pitting and crevice corrosion in chloride environments. It also maintains higher strength and creep resistance at elevated temperatures. 이것은 316 the standard choice for marine hardware, coastal structures, chemical processing equipment, pharmaceutical machinery, medical implants and heat exchangers where 304 would eventually pit or rust.
중에서 선택하는 방법 304 그리고 316
- For indoor, 음식, beverage or general industrial use, 304 is sufficient and more economical.
- For marine, 연안, offshore or chloride-exposed environments, always choose 316.
- For chemical, pharmaceutical and medical applications, 316 is the safer choice.
- For decorative and architectural purposes, both grades can be supplied with brushed or mirror finishes.
- 316엘 (저탄소) is recommended when welding thick sections to avoid sensitization and intergranular corrosion.
결론
The choice between 304 그리고 316 comes down to the working environment: 304 covers most general applications at a lower cost, ~하는 동안 316 provides superior corrosion resistance where chlorides, chemicals or salt water are present. QIDAMT supplies both 304 그리고 316 stainless steel tubes, plates, bars, strips and coils with mill test certificates, 경쟁력 있는 가격과 신속한 배송. Contact us for a quote today.
