As a leading manufacturer and supplier in Naypyidaw, Naing Steel takes pride in producing robust steel solutions that power the nation’s growth. Our HB 400 Sheets and Plates are a cornerstone of this commitment, engineered to meet the rigorous demands of modern construction and heavy industry. We understand that the strength of your project relies on the quality of its materials, which is why we ensure our products offer the exceptional durability and reliability that professionals across Myanmar have come to trust for their most challenging applications.
The composition of our HB 400 Sheets and Plates is carefully balanced to achieve a Brinell Hardness of 400, a key indicator of their superior resistance to wear and abrasion. This high-strength steel is designed to withstand significant impact and heavy loads without compromising its structural integrity. The result is a material that not only boasts impressive toughness but also maintains consistent performance under stress, making it a dependable choice where failure is not an option, ensuring long-lasting value in even the most demanding environments.
Width:Â 500-3000mm
Thickness :Â 3-130mm
Length:Â 1000-12000mm
Heat Treatment:Â N, Q+T
Surface Paint:Â EP, PE, HDP, SMP, PVDF
| Hardened 400 Chemical Composition (%) | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|
| Plate | C | Si | Mn | P | S | Cr | Ni | Mo | B | CEV | CET |
| thickness mm | max % | max % | max % | max % | max % | max % | max % | max % | max % | typv | typv |
| 3- 6 | 0.15 | 0.70 | 1.60 | 0.025 | 0.01 | 0.50 | 0.25 | 0.25 | 0.004 | 0.41 | 0.28 |
| 3-（8） | 0.15 | 0.70 | 1.60 | 0.025 | 0.01 | 0.30 | 0.25 | 0.25 | 0.004 | 0.33 | 0.23 |
| 8 – 20 | 0.15 | 0.70 | 1.60 | 0.025 | 0.01 | 0.50 | 0.25 | 0.25 | 0.004 | 0.37 | 0.27 |
| （20）-32 | 0.18 | 0.70 | 1.60 | 0.025 | 0.01 | 1.00 | 0.25 | 0.25 | 0.004 | 0.48 | 0.29 |
| （32）-45 | 0.22 | 0.70 | 1.60 | 0.025 | 0.01 | 1.40 | 0.50 | 0.60 | 0.004 | 0.57 | 0.31 |
| （45）-51 | 0.22 | 0.70 | 1.60 | 0.025 | 0.01 | 1.40 | 0.50 | 0.60 | 0.004 | 0.57 | 0.38 |
| （51）-80 | 0.27 | 0.70 | 1.60 | 0.025 | 0.01 | 1.40 | 1.00 | 0.60 | 0.004 | 0.65 | 0.41 |
| （80）-130 | 0.32 | 0.70 | 1.60 | 0.025 | 0.01 | 1.40 | 1.50 | 0.60 | 0.004 | 0.73 | 0.48 |
| Mechanical properties of Hardened 400 | |||||
|---|---|---|---|---|---|
| Grade | Mechanical Property | Charpy V Impact Test | |||
| HARDOX 400 | Yield | Tensile | Elongation | Degree | longitudinal |
| Min Mpa | Mpa | Min % | -40 | J | |
| 1000 | 1250 | 10 | 45 | ||
We provide products that come with both mill test certificates and third-party test certificates, ensuring the highest standards of quality and compliance.
| Thickness (mm) | Product | Hardness Range (HBW) |
|---|---|---|
| 2.5 – 6.4 | Cut Lengths | 360 – 420 |
| 5 – 15 | Heavy Plates | 360 – 420 |
| 15- 30 | Heavy Plates | 360 – 450 |
| 30 – 60 | Heavy Plates | 360 – 480 |
The uses for these high-strength sheets and plates are incredibly diverse, forming the backbone of major infrastructure projects. They are essential in constructing the skeletons of new commercial buildings, industrial facilities, and heavy-duty mining equipment. You’ll also find them in the fabrication of robust machinery frames, durable truck bodies, and reliable support structures for bridges. Essentially, any application that demands a material capable of handling immense pressure and resisting constant wear is an ideal fit for the exceptional performance of our HB 400 steel.
Naing Steel is a leading manufacturer, supplier and exporter of high-quality Carbon Steel, Alloy Steel, Mild Steel and Galvanized Steel products. Our extensive product range includes Pipes, Tubes, Flanges, Pipe Fittings, Forged Fittings, Sheets and Plates, catering to various industries in Naypyidaw, Myanmar.
Copyright 2025 Naing Steel. All rights reserved
