Ar 450 Pelat Baja
AR450 steel plate is a high-performance abrasion resistant steel with approximately 450 HB hardness, offering improved wear resistance compared with AR400 steel. Through alloy strengthening and heat treatment, it achieves excellent durability in severe abrasive environments.
- Keterangan
AR450 steel plate is a high-hardness abrasion resistant steel designed for applications involving heavy wear, gesekan, dan dampak. “AR” adalah singkatan dari Tahan Abrasi, while “450” refers to the approximate Brinell hardness value of the material.
Compared with AR400 steel plate, AR450 offers improved wear resistance and longer service life in abrasive environments while still maintaining reasonable toughness and weldability.
1. Chemical Composition of AR450 Steel Plate
AR450 steel achieves its hardness and wear resistance through controlled alloy composition and heat treatment.
Komposisi kimia yang khas meliputi:
| Elemen | Fungsi Khas |
|---|---|
| Karbon (C) | Meningkatkan kekerasan dan kekuatan |
| mangan (M N) | Meningkatkan ketangguhan dan kemampuan pengerasan |
| Kromium (Kr) | Meningkatkan ketahanan aus |
| Nikel (Di dalam) | Meningkatkan ketangguhan dan ketahanan benturan |
| Molibdenum (Mo) | Stabilizes hardness after heat treatment |
| Boron (B) | Increases hardenability in small amounts |
The exact composition varies depending on manufacturer and production standard.
2. Mechanical Properties of AR450 Steel
| Milik | Typical Performance |
|---|---|
| Kekerasan | ~450HB |
| Kekuatan Tarik | Tinggi |
| Ketahanan Aus | Bagus sekali |
| Ketangguhan Dampak | Bagus |
| Kemampuan las | Sedang hingga baik |
| Kehidupan Pelayanan | Longer than AR400 in abrasive conditions |
The steel is usually produced through quenching and tempering processes to achieve a hard martensitic structure.
3. Main Characteristics of AR450 Steel Plate
Ketahanan Aus Yang Sangat Baik
AR450 provides stronger resistance to abrasive particles such as sand, kerikil, bijih, and coal compared with lower hardness grades.
Ketangguhan yang Seimbang
Although harder than AR400, AR450 still maintains useful impact resistance for industrial equipment.
Umur Peralatan yang Diperpanjang
The higher hardness reduces material loss during operation, helping reduce maintenance and replacement frequency.
Kekuatan Struktural yang Baik
The material can withstand both abrasion and moderate mechanical loading.
4. AR450 vs AR400 Steel Plate Comparison
| Milik | AR400 | AR450 |
|---|---|---|
| Kekerasan | ~400HB | ~450HB |
| Ketahanan Aus | Bagus | Lebih baik |
| Resistensi Dampak | Lebih tinggi | Slightly lower |
| Sifat mampu bentuk | Lebih mudah | Lebih sulit |
| Kemampuan las | Lebih baik | Slightly reduced |
| Kehidupan Pelayanan | Panjang | Longer in abrasive environments |
5. Application Difference Between AR450 and AR400
AR400 Typical Applications
- General mining equipment
- Suku cadang pertanian
- Light to medium abrasion environments
- Structural wear liners
AR450 Typical Applications
- Heavy-duty mining liners
- Crusher wear plates
- Badan truk sampah
- Sistem penanganan semen
- Severe abrasive material transfer systems
AR450 is generally selected when wear intensity is higher and longer service life is required.
6. Karakteristik Pengolahan
Because of its higher hardness, AR450 requires more controlled processing than AR400.
Metode pemrosesan umum:
- Pemotongan plasma
- Pemotongan laser
- Pengelasan terkendali
- Large-radius bending
Processing considerations:
- Preheating may be required before welding
- Stronger tooling is needed for machining
- Higher springback during bending
- Reduced machinability compared with AR400
7. Common Industrial Applications
AR450 steel plate is widely used in:
- Peralatan pertambangan dan penggalian
- Bucket ekskavator dan pemuat
- Peluncuran konveyor
- Crushing and screening systems
- Pabrik semen dan agregat
- Heavy material handling equipment
