The most popular steel plates for severe buckets are:

• Hardox 450 is a high-strength, wear-resistant steel that is ideal for severe-duty applications. It has a Brinell hardness of 450 HBW and is twice as hard as mild steel. Hardox 450 is also very ductile, which makes it resistant to impact and cracking.
• T1 is a high-strength, quenched and tempered steel that is also used for severe-duty applications. It has a Brinell hardness of 380-430 HBW and is more affordable than Hardox 450. However, T1 is not as wear-resistant as Hardox 450 and may require more frequent maintenance.
• Domex 690 is a high-strength structural steel that is often used for the sides and bottom of severe buckets. It has a Brinell hardness of 340-380 HBW and is more affordable than Hardox 450 or T1. However, Domex 690 is not as wear-resistant as Hardox 450 or T1 and may require more frequent maintenance.

Comparison of Hardox 450, T1, and Domex 690:

The best steel plate for your severe bucket will depend on your specific needs and budget. If you need a bucket that is extremely wear-resistant and can handle the most demanding applications, Hardox 450 is the best choice. If you are on a tighter budget, T1 or Domex 690 may be a better option.

Here are some additional things to consider when choosing a steel plate for your severe bucket:

• The type of material you will be handling. If you will be handling extremely abrasive materials, such as rocks and gravel, you will need a steel plate that is very wear-resistant, such as Hardox 450. If you will be handling less abrasive materials, such as dirt and sand, you may be able to get away with a less wear-resistant steel plate, such as T1 or Domex 690.
• The size and weight of your bucket. If you need a large or heavy bucket, you will need a steel plate that is strong and durable. Hardox 450 is a good choice for large and heavy buckets because it is both strong and wear-resistant.
• Your budget. Hardox 450 is the most expensive steel plate, but it is also the most wear-resistant. T1 and Domex 690 are more affordable options, but they are not as wear-resistant as Hardox 450.

It is important to consult with a bucket manufacturer to determine the best steel plate for your specific needs.