303 Tấm không gỉ

303 stainless sheet is a sulfur-enhanced austenitic stainless steel designed for superior machinability. It offers good corrosion resistance, reliable strength, and excellent performance in high-speed machining environments.

Nó được sử dụng rộng rãi trong thành phần chính xác, ốc vít, trục, van, and CNC-machined parts, where production efficiency and dimensional accuracy are critical.

Sự miêu tả

303 stainless sheet is a free-machining austenitic stainless steel designed for improved machinability compared to standard 304. It contains added sulfur to enhance cutting performance, making it especially suitable for precision machining parts.

Trong khi 303 offers good corrosion resistance, its primary advantage lies in excellent machinability and high production efficiency.

1. Thành phần hóa học của 303 thép không gỉ

The typical chemical composition is as follows:

Yếu tố	Nội dung (%)
crom (Cr)	17.0 – 19.0
Niken (TRONG)	8.0 – 10.0
lưu huỳnh (S)	0.15 – 0.35
Cacbon (C)	≤ 0.15
Mangan (Mn)	≤ 2.0
Silicon (Và)	≤ 1.0
Phốt pho (P)	≤ 0.20
Sắt (Fe)	Sự cân bằng

Key Alloy Characteristics

Sulfur Addition (0.15–0.35%)
Improves chip breaking and reduces tool wear during machining.
crom (17–19%)
Provides corrosion resistance.
Niken (8–10%)
Enhances ductility and toughness.

2. Tính chất cơ học (Typical Annealed Condition)

Tài sản	Giá trị điển hình
Độ bền kéo	≥ 515 MPa
Sức mạnh năng suất	≥ 205 MPa
Độ giãn dài	≥ 40%
độ cứng	≤ 95 HRB (ủ)

Mechanical properties are similar to 304 in annealed condition, Nhưng 303 is optimized for machining rather than welding or deep drawing.

3. Performance Characteristics

3.1 Excellent Machinability

303 offers significantly better machinability than 304 due to sulfur content, making it ideal for high-speed CNC processing.

3.2 Chống ăn mòn tốt

Suitable for mild atmospheric environments
Comparable to 304 in many non-chloride environments

3.3 Reduced Weldability

Because of higher sulfur content, weldability is lower than 304 and may result in hot cracking.

3.4 Moderate Formability

Not recommended for severe cold forming compared to 304.

4. Ứng dụng phổ biến của 303 Tấm không gỉ

Due to its free-machining characteristics, 303 stainless sheet is commonly used in:

Precision Machining Industry

Trục
Bushings
Nuts and bolts
Screws
Precision fittings

Industrial Components

Valve parts
Pump components
Gears
CNC-machined structural parts

Electrical and Mechanical Equipment

Connectors
Instrument parts
Fasteners

303 is particularly suitable for automatic lathe production and CNC machining operations where high productivity is required.

5. So sánh với 304 thép không gỉ

Tài sản	303	304
Khả năng gia công	Xuất sắc	Vừa phải
Chống ăn mòn	Tốt	Rất tốt
Tính hàn	Giới hạn	Tốt
Sulfur Content	Cao	Very Low
Khả năng định dạng	Vừa phải	Tốt