303 Lembaran Tahan Karat

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.

Ini banyak digunakan di komponen presisi, pengencang, poros, katup, and CNC-machined parts, where production efficiency and dimensional accuracy are critical.

Keterangan

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.

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

1. Komposisi Kimia dari 303 Baja Tahan Karat

Komposisi kimia khasnya adalah sebagai berikut:

Elemen	Isi (%)
Kromium (Kr)	17.0 – 19.0
Nikel (Di dalam)	8.0 – 10.0
Sulfur (S)	0.15 – 0.35
Karbon (C)	≤ 0.15
mangan (M N)	≤ 2.0
Silikon (Dan)	≤ 1.0
Fosfor (P)	≤ 0.20
Besi (Fe)	Keseimbangan

Key Alloy Characteristics

Sulfur Addition (0.15–0.35%)
Improves chip breaking and reduces tool wear during machining.
Kromium (17–19%)
Memberikan ketahanan terhadap korosi.
Nikel (8–10%)
Enhances ductility and toughness.

2. Sifat Mekanik (Typical Annealed Condition)

Milik	Nilai Khas
Kekuatan Tarik	≥ 515 MPa
Kekuatan Hasil	≥ 205 MPa
Pemanjangan	≥ 40%
Kekerasan	≤ 95 HRB (dianil)

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

3. Karakteristik Kinerja

3.1 Kemampuan Mesin yang Luar Biasa

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

3.2 Ketahanan Korosi Yang Baik

Suitable for mild atmospheric environments
Sebanding dengan 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. Aplikasi Umum dari 303 Lembaran Tahan Karat

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

Precision Machining Industry

Poros
Bushings
Nuts and bolts
Screws
Precision fittings

Komponen Industri

Valve parts
Pump components
Gears
CNC-machined structural parts

Electrical and Mechanical Equipment

Connectors
Bagian instrumen
Pengencang

303 sangat cocok untuk produksi bubut otomatis dan operasi pemesinan CNC dimana diperlukan produktivitas yang tinggi.

5. Perbandingan dengan 304 Baja Tahan Karat

Milik	303	304
kemampuan mesin	Bagus sekali	Sedang
Ketahanan Korosi	Bagus	Sangat bagus
Kemampuan las	Terbatas	Bagus
Kandungan Belerang	Tinggi	Sangat Rendah
Sifat mampu bentuk	Sedang	Bagus