430 Lembaran

430 Lembaran

430 stainless steel sheet is a ferritic stainless steel widely used for its sifat magnetik, cost efficiency, and good corrosion resistance in mild environments. It is one of the most important grades in the 400 siri.

The 400 series stainless steels are generally characterized by chromium-based corrosion resistance, magnetic behavior, and lower nickel content, making them economical alternatives to 300 series stainless steels.

Penerangan

430 kepingan keluli tahan karat is a ferritic stainless steel from the 400 siri. It is widely used in household appliances, aplikasi hiasan, trim automotif, and industrial components due to its good corrosion resistance, sifat magnetik, dan keberkesanan kos.

Unlike austenitic stainless steels such as 304, 430 contains no nickel, which makes it more economical while still providing decent corrosion resistance in mild environments.

Komposisi Kimia bagi 430 Keluli Tahan Karat

unsur	Kandungan Biasa
Besi (Fe)	Keseimbangan
Chromium (Cr)	16.0 – 18.0%
Karbon (C)	≤ 0.12%
Mangan (Mn)	≤ 1.0%
silikon (Dan)	≤ 1.0%
Nikel (Dalam)	≤ 0.75% (very low)

Chromium is the main element providing corrosion resistance.

Ciri-ciri Utama 430 Keluli Tahan Karat

1. Magnetic Property

430 stainless steel is magnetik, which is a key difference from 300 series stainless steels.

2. Ketahanan Kakisan yang Baik (Mild Environments)

Environment	Prestasi
Indoor use	Cemerlang
Dry atmosphere	bagus
Light industrial environment	Boleh diterima
Marin / chloride environment	Limited resistance

It performs well in non-severe corrosive conditions.

3. Cost-Effective Material

Because it contains tiada nikel, 430 stainless steel is significantly more economical than 304 atau 316 gred.

4. Kebolehbentukan yang baik (Limited Compared to 304)

Suitable for bending and light stamping
Lower ductility than austenitic grades
Requires careful forming control

5. Rintangan Haba

430 has relatively good oxidation resistance at elevated temperatures, making it suitable for moderate heat applications.

Sifat Mekanikal bagi 430 Keluli Tahan Karat

Harta benda	Nilai Biasa
Kekuatan Tegangan	450 – 600 MPa
Kekuatan Hasil	~205 MPa
Pemanjangan	20 – 30%
Kekerasan	Sederhana
Magnet	ya

400 Series Stainless Steel Overview

The 400 series stainless steels are ferritic and martensitic stainless steels characterized by chromium-based corrosion resistance and magnetic properties.

Main Features of 400 Siri Keluli Tahan Karat

1. Chromium-Based Composition

Contains 11–30% chromium
No or very low nickel content
Corrosion resistance depends mainly on chromium

2. Magnetic Behavior

Semua 400 series stainless steels are magnetic
This makes them suitable for applications requiring magnetic response

3. Keupayaan Rawatan Haba (Some Grades)

Gred martensit (cth., 410, 420) can be hardened by heat treatment
Gred feritik (suka 430) cannot be hardened significantly

4. Cost Advantage

Kos yang lebih rendah berbanding dengan 300 siri
No nickel content reduces material price volatility

Common Grades in 400 Siri

Gred	taip	Ciri-ciri	Permohonan
409	Feritik	Tahan panas, kos rendah	Ekzos automotif
410	Martensitik	Hardenable	Tools, bahagian mekanikal
420	Martensitik	Kekerasan yang tinggi	Kutleri, bilah
430	Feritik	Corrosion resistant, magnetik	Perkakas, hiasan

Kelebihan daripada 400 Siri Keluli Tahan Karat

Ciri	Faedah
Magnetic properties	Useful for special industrial applications
Kecekapan kos	Kos yang lebih rendah daripada 300 siri
Rintangan pengoksidaan yang baik	Suitable for heat exposure
Rintangan kakisan sederhana	Suitable for indoor and mild environments
Wide application range	Perkakas, automotif, industrial use

Limitations of 400 Siri Keluli Tahan Karat

Had	Explanation
Rintangan kakisan yang lebih rendah daripada 304	Not suitable for harsh marine environments
Lower ductility	Less suitable for deep drawing
Kebolehkimpalan terhad (some grades)	Requires controlled welding process