ASTM A387 GR 91 CLASS 2
Products Description applications in the industrial sector. This grade is known for its excellent mechanical strength, high-temperature resistance, and corrosion resistance, which contribute to its wide usage in critical components and structures. The mechanical properties of ASTM A387 GR 91...
Description
Products Description
ASTM A387 GR 91 CLASS 2 Chemical Requirements
| . | . |
|---|---|
| Carbon (C) | % |
| Heat Analysis: Product Analysis: |
0.08 - 0.12 0.06 - 0.15 |
| Manganese (Mn) | % |
| Heat Analysis: Product Analysis: |
0.30 - 0.60 0.25 - 0.66 |
| Phosphorus (P) | % |
| Heat Analysis: Product Analysis: |
0.020 0.025 |
| Sulphur (S) (Max) | % |
| Heat Analysis: Product Analysis: |
0.010 0.012 |
| Silicon (Si) | % |
| Heat Analysis: Product Analysis: |
0.20 - 0.50 0.18 - 0.56 |
| Chromium (Cr) | % |
| Heat Analysis: Product Analysis: |
8.00 - 9.50 7.90 - 9.60 |
| Molybdenum (Mo) | % |
| Heat Analysis: Product Analysis: |
0.85 - 1.05 0.80 - 1.10 |
| Nickel (Ni) | % |
| Heat Analysis: Product Analysis: |
0.40 0.43 |
| Vanadium (Vn) | % |
| Heat Analysis: Product Analysis: |
0.18 - 0.25 0.16 - 0.27 |
| Columbium (Nb) | % |
| Heat Analysis: Product Analysis: |
0.06 - 0.10 0.05 - 0.11 |
| Nitrogen (N) | % |
| Heat Analysis: Product Analysis: |
0.030 - 0.070 0.025 - 0.080 |
| Aluminium (Al) | % |
| Heat Analysis: Product Analysis: |
0.02 0.02 |
| Titanium (Ti) | % |
| Heat Analysis: Product Analysis: |
0.01 0.01 |
| Zirconium (Zr) | % |
| Heat Analysis: Product Analysis: |
0.01 0.01 |
The chemical composition of ASTM A387 GR 91 CLASS 2 is precisely controlled to achieve the desired properties. It typically contains a specific percentage of carbon, manganese, silicon, chromium, molybdenum, and other alloying elements. The balance of these elements is crucial in determining the material's microstructure and mechanical and corrosion resistance characteristics.
Furthermore, the manufacturing process of ASTM A387 GR 91 CLASS 2 involves strict quality control measures to ensure the consistency and reliability of the final product. This includes precise heat treatment, forging, and machining operations to meet the specified dimensional and performance requirements.
In conclusion, ASTM A387 GR 91 CLASS 2 is a high-performance steel grade that offers a combination of mechanical strength, high-temperature resistance, and corrosion resistance. Its properties and characteristics make it an essential material choice in numerous industries where reliability and performance are of utmost importance. Ongoing research and development in this area are likely to further enhance the properties and application scope of this grade, contributing to the advancement of engineering and industrial technologies.
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