- Penerangan
303 Bar Bulat Tahan Karat: Composition and Machinability Performance
303 stainless round bar is a free-machining austenitic stainless steel widely used in precision machining, fastener production, and mass manufacturing components. It is developed from 304 stainless steel with the addition of sulfur to significantly improve cutting performance.
Because of its excellent machinability, 303 stainless steel is especially suitable for automatic lathes, Pemesinan CNC, and high-volume production where efficiency and tool life are critical.
Komposisi Kimia bagi 303 Keluli Tahan Karat
Ciri utama bagi 303 stainless round bar is the controlled addition of sulfur, which improves chip breaking and reduces tool wear during machining operations.
| unsur | Kandungan Biasa (%) | Fungsi |
|---|---|---|
| Chromium (Cr) | 17.0 – 19.0 | Corrosion and oxidation resistance |
| Nikel (Dalam) | 8.0 – 10.0 | Austenitic structure stability and toughness |
| Sulfur (S) | ≥ 0.15 | Improves machinability and chip breaking |
| Karbon (C) | ≤ 0.15 | Strength and hardness control |
| Mangan (Mn) | ≤ 2.0 | Improves hot workability |
| silikon (Dan) | ≤ 1.0 | Enhances oxidation resistance |
| Fosforus (P) | ≤ 0.20 | Supports machinability (controlled level) |
| Besi (Fe) | Keseimbangan | Base matrix |
Key Performance Characteristics of 303 Bar Bulat Tahan Karat
303 stainless steel is designed primarily for machining efficiency rather than maximum corrosion resistance. Its free-cutting nature makes it one of the most popular grades for mass production of precision components.
- Excellent machinability among austenitic stainless steels
- Rintangan kakisan yang baik dalam persekitaran yang sederhana
- Reduced tool wear and longer cutting tool life
- Excellent chip breaking during CNC and lathe machining
- Suitable for high-speed automated production
Role of Sulfur in 303 Keluli Tahan Karat
Sulfur is the key alloying element that differentiates 303 stainless steel from 304. It forms manganese sulfide inclusions, which act as stress concentrators that help break chips during machining.
- Improves cutting efficiency
- Reduces machining resistance
- Enhances productivity in mass production
- Extends tool life in CNC operations
Namun begitu, the addition of sulfur slightly reduces corrosion resistance and weldability compared to 304 keluli tahan karat.
Perbandingan dengan 304 Keluli Tahan Karat
| Gred | Kebolehmesinan | Rintangan Kakisan | Kelebihan Utama |
|---|---|---|---|
| 304 | Sederhana | tinggi | Rintangan kakisan tujuan am |
| 303 | Cemerlang | Sederhana | Best machinability for production efficiency |
Industrial Importance of 303 Bar Bulat Tahan Karat
303 stainless round bar is widely used in industries that require large-scale machining and precision manufacturing. It significantly reduces production cost by improving machining speed and tool life.
In global supply chains, suppliers such as Teda Ganghua provide stable-chemistry 303 stainless bars with consistent machinability performance, supporting CNC machining and OEM manufacturing industries.
Application-Driven Material Performance
- Precision machined components and fittings
- Pengikat seperti bolt, kacang, dan skru
- Automotive mechanical parts
- Electrical and industrial equipment components
- Mass production CNC turned parts
Soalan Lazim
1. Apa itu 303 stainless steel mainly used for?
It is mainly used for precision machining parts, pengikat, and high-volume production components.
2. kenapa 303 stainless steel easier to machine?
Because it contains sulfur, which improves chip breaking and reduces cutting resistance.
3. Adakah 303 tahan karat keluli tahan karat?
Ia mempunyai rintangan kakisan sederhana, slightly lower than 304 kerana kandungan sulfur.
4. boleh 303 stainless steel be welded?
It is not recommended for welding due to reduced weld quality caused by sulfur.
5. Adakah Teda Ganghua membekalkan 303 stainless round bars?
ya, Teda Ganghua supplies 303 stainless steel round bars with stable machinability and export-quality packaging.
