Description
Product Description ASTM A556 Superheater Tube
ASTM A556 is a specification that defines seamless cold-drawn carbon steel tubes designed for use in boilers and heat exchangers, specifically in high-pressure applications like superheater and reheater sections. These tubes are engineered to withstand extreme temperature fluctuations, high pressures, and corrosive environments, making them a vital component in the power generation, petrochemical, and industrial sectors.
Material and Standards
ASTM A556 tubes are made from carbon-manganese steel, offering exceptional mechanical strength, thermal resistance, and durability. The specification is divided into two grades: Grade A2 and Grade B2. Each grade has distinct chemical and mechanical properties tailored to meet specific application requirements. These tubes are manufactured to meet precise tolerances, ensuring reliable performance in demanding conditions.
Key Features and Benefits
- High Strength: Offers excellent mechanical strength to withstand elevated temperatures and pressures.
- Corrosion Resistance: Resistant to oxidation and corrosion in high-temperature conditions.
- Thermal Stability: Maintains structural integrity under extreme thermal conditions.
- Precise Dimensions: Cold-drawn manufacturing ensures superior dimensional accuracy and smooth internal/external finishes.
Applications
- Superheaters: Used in boilers for converting saturated steam into superheated steam.
- Heat Exchangers: Provides efficient heat transfer in industrial systems.
- Boilers: Integral to maintaining high-efficiency performance in power generation.
ASTM A556 Grade A2, B2, and C2 Chemical Composition
Element | Grade A2 | Grade B2 | Grade C2 |
---|---|---|---|
Carbon (C) | 0.18 | 0.20 | 0.24 |
Manganese (Mn) | 0.27-0.63 | 0.30-0.80 | 0.30-0.93 |
Phosphorus (P) | 0.025 | 0.025 | 0.025 |
Sulfur (S) | 0.025 | 0.025 | 0.025 |
Silicon (Si) | 0.10 | 0.10 | 0.10 |
ASTM A556 Grade A2, B2, and C2 Mechanical Properties
Property | Grade A2 | Grade B2 | Grade C2 |
---|---|---|---|
Tensile Strength, min (MPa) | 345 (50 ksi) | 415 (60 ksi) | 485 (70 ksi) |
Yield Strength, min (MPa) | 205 (30 ksi) | 240 (35 ksi) | 275 (40 ksi) |
Elongation, min (%) | 35 | 30 | 30 |
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