SA210C high-pressure boiler tubes are medium-grade carbon-manganese steel seamless tubes according to the ASME SA-210 standard, corresponding to the domestic material 20G/GB5310. They are mainly used in boiler pressure components such as economizers and water-cooled walls, with typical operating temperatures below 450℃. Their carbon content is 0.27%-0.35%, manganese ≤1.00%, silicon 0.10%-0.35%, tensile strength ≥485MPa, yield strength ≥275MPa, thermal conductivity 45W/(m·K), and they perform excellently below 580℃. The microstructure is pearlite + ferrite, with a grain size exceeding ASTM No. 5.
Chemical Composition
The chemical composition of SA-210C seamless steel pipe mainly includes elements such as carbon, manganese, silicon, phosphorus, and sulfur, with the specific contents as follows:
Carbon (C): ≤0.35%
Manganese (Mn): 0.29%~1.06%
Silicon (Si): ≥0.10%
Phosphorus (P): ≤0.035%
Sulfur (S): ≤0.035%
Mechanical Properties
SA-210C seamless steel pipe exhibits excellent mechanical properties, with the following specific indicators:
Tensile Strength: ≥485MPa
Yield Strength: ≥275MPa
Elongation: ≥30%
Hardness: ≤89HRB
Manufacturing Process
SA-210C seamless steel pipes are typically manufactured using a hot-rolling process. This process offers advantages such as high production efficiency, low cost, and high strength, while also improving the physical properties of the steel pipe, making it more suitable for high-temperature and high-pressure environments.
Application Areas
- Construction Industry: Used in the construction of high-rise buildings, long-span bridges, and large industrial plants, particularly suitable for construction in earthquake-prone areas.
- Petrochemical Industry: Widely used in pipeline systems within the petroleum and chemical industries due to its corrosion resistance and high-pressure resistance.
- Power Industry: Primarily used in the manufacture of high-voltage power poles and supports, and also in the water-cooled walls, economizers, low-temperature superheaters, and other heating surface piping systems, headers, and steam-water pipelines of large-capacity power plant boilers.
- Shipbuilding Industry: Meets the high requirements of shipbuilding and is widely used in the construction of ship bottom structures and hulls.
- Environmental Protection Industry: Used in wastewater treatment and waste disposal systems, capable of withstanding various corrosive substances.