Metal Tubular Products The chemical composition of this alloy steel plate includes controlled levels of carbon, manganese, phosphorus, sulfur, silicon, chromium, molybdenum, nickel, and copper, which are carefully balanced to ensure optimal performance in high-temperature and high-pressure environments.
SA387 Grade 12 Class 2 Alloy Steel Plate is a high-quality material primarily used in the fabrication of pressure vessels and industrial boilers. Its design is geared towards providing exceptional performance in environments characterized by high temperatures and corrosive conditions, making it a popular choice in industries such as petrochemical, power generation, and chemical processing. This alloy steel plate possesses impressive mechanical properties, including a tensile strength typically ranging from 65 to 85 ksi (450 to 585 MPa), a minimum yield strength of 38 ksi (275 MPa), and an elongation of 22% or more in a 2-inch (50mm) gauge length, along with a reduction of area of 40% or more in a 50mm specimen. The hardness of SA387 Grade 12 Class 2 can vary between 187 and 225 HB (Brinell hardness).
SA387 Grade 12 Class 2 alloy steel plate conforms to various international standards, including ASTM A387, ASME SA387, EN 10028-2, DIN 17155, JIS G3103, and BS 1501, ensuring its compliance with global manufacturing and quality assurance norms. Its remarkable combination of mechanical strength and corrosion resistance makes it an indispensable material for critical industrial processes, particularly those involving elevated temperatures and pressures, where the integrity and safety of pressure vessels are of paramount importance.
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Specification:
| Specification | Description |
| ASTM A387 | Standard Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum |
| ASME SA387 | Boiler and Pressure Vessel Code, Section II, Part A, Specification for Pressure Vessel Plates, Alloy Steel, Chromium-Molybdenum |
| EN 10028-2 | European standard for flat products made of steels for pressure purposes - Part 2: Non-alloy and alloy steels with specified elevated temperature properties |
| DIN 17155 | German standard for pressure vessel steels |
| JIS G3103 | Japanese Industrial Standards for pressure vessels |
| BS 1501 | British Standards for steels for pressure purposes |
Chemical composition of SA387 Grade 12 Class 2 Alloy Steel Plate
| Element | Composition Range (% by weight) |
| Carbon (C) | 0.05 - 0.17 |
| Manganese (Mn) | 0.40 - 0.65 |
| Phosphorus (P) | 0.035 (max) |
| Sulfur (S) | 0.035 (max) |
| Silicon (Si) | 0.15 - 0.40 |
| Chromium (Cr) | 0.80 - 1.15 |
| Molybdenum (Mo) | 0.45 - 0.60 |
| Nickel (Ni) | 0.45 (max) |
| Copper (Cu) | 0.15 (max) |
Mechanical Properties of SA387 Grade 12 Class 2 Alloy Steel Plate
| Property | Value |
| Tensile Strength, ksi (MPa) | 65-85 (450-585) |
| Yield Strength, ksi (MPa) | 38 (275) min |
| Elongation in 2 inches (%) | 22% min in 2" (50mm) |
| Reduction of Area (%) | 40% min (50mm) |
| Hardness, HB | 187-225 |
Advantages of SA387 Grade 12 Class 2 Alloy Steel Plate
- Good general corrosion resistance and high strength
- Good sulfide stress corrosion resistance
- Resistance to chloride pitting and crevice corrosion
- Higher resistance to chloride stress corrosion cracking
- Easy to weld and conform
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Applications Industry
| Pharmaceutical Equipment | Chemical Equipment |
| Sea Water Equipment | Heat Exchangers |
| Heat Exchangers | Gas Processing |
| Condensers | Specialty Chemicals |
| Pulp and Paper Industry | Pharmaceuticals |
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