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303 stainless sheet is a free-machining austenitic stainless steel material designed for applications requiring excellent machinability and good corrosion resistance. It is a modified version of 304 스테인레스 스틸, with added sulfur to improve cutting performance. 이 때문에, 303 stainless steel sheet is commonly used for precision machining parts, 산업용 부품, and mechanical fabrication.
무엇인가요 303 스테인레스 시트?
303 stainless sheet is an austenitic chromium-nickel stainless steel known for its outstanding machinability. The addition of sulfur improves chip breaking during machining, making it easier to cut, 송곳, mill, and turn compared with standard 304 스테인레스 스틸.
하지만 303 has slightly lower corrosion resistance than 304, it offers better processing efficiency for parts that require extensive machining.
화학 성분 303 스테인레스 스틸
The chemical composition of 303 stainless sheet provides a balance between corrosion resistance and machinability.
| 요소 | 콘텐츠 (%) |
|---|---|
| 탄소 (기음) | ≤ 0.15 |
| 크롬 (Cr) | 17.0 – 19.0 |
| 니켈 (~ 안에) | 8.0 – 10.0 |
| 망간 (망) | ≤ 2.00 |
| 규소 (그리고) | ≤ 1.00 |
| 인 (피) | ≤ 0.20 |
| 황 (에스) | ≥ 0.15 |
| 철 (철) | 균형 |
The elevated sulfur content is the main feature that distinguishes 303 from other austenitic stainless steel grades.
기계적 성질 303 스테인레스 시트
303 stainless steel provides good mechanical strength while maintaining excellent machinability.
| 재산 | 일반적인 값 |
|---|---|
| 인장 강도 | ≥ 520 MPa |
| 항복 강도 | ≥ 205 MPa |
| 연장 | ≥ 35% |
| 경도 | ≤ 241 HB |
| 밀도 | 7.93 g/cm3 |
| 녹는 범위 | 1400 – 1450°C |
It remains non-magnetic in annealed condition but may become slightly magnetic after cold working.
주요 성능 특성
우수한 가공성
303 stainless steel is widely recognized for its superior machinability among austenitic stainless steels. It performs well in:
- CNC 가공
- 선회
- 교련
- Milling
- Threading
- 정밀 절단
Its machinability can be significantly better than 304 due to sulfur inclusion.
좋은 내식성
303 offers good corrosion resistance in mild atmospheric and industrial environments, though it is slightly lower than 304 because sulfur reduces pitting resistance.
Good Surface Finish
The material can achieve a smooth machined finish, making it suitable for visible precision components.
Non-Heat Treatable
Like most austenitic stainless steels, 303 cannot be hardened by heat treatment but can be strengthened by cold working.
일반적인 응용 분야 303 스테인레스 시트
303 stainless steel sheet is widely used for components that require machining and moderate corrosion resistance.
- 정밀 가공 부품
- 샤프트
- 패스너
- 기어
- 너트와 볼트
- 밸브 부품
- 부싱
- Aerospace fittings
- 악기 부품
- Electrical connectors
It is especially suitable for parts manufactured by CNC processing.
303 대 304 스테인레스 스틸
| 특징 | 303 스테인레스 시트 | 304 스테인레스 시트 |
|---|---|---|
| 구조 | 오스테나이트계 | 오스테나이트계 |
| 황 함량 | 더 높은 | 기준 |
| 가공성 | 훌륭한 | 보통의 |
| 부식 저항 | 좋은 | 더 나은 |
| 용접성 | 낮추다 | 더 나은 |
| 일반적인 사용 | Machined parts | 일반제작 |
303 is preferred for machining-intensive parts, ~하는 동안 304 is better for welding and corrosion-critical applications.
일반적인 시트 크기
303 stainless sheet is commonly supplied in thin and medium gauge formats.
| 두께 | 너비 | 길이 |
|---|---|---|
| 0.5 mm | 1000 mm | 2000 mm |
| 1.0 mm | 1219 mm | 2438 mm |
| 2.0 mm | 1500 mm | 3000 mm |
| 3.0 mm | 1500 mm | 6000 mm |
Custom laser cutting and machining services are commonly used for industrial projects.
