A105 Round steel

ASTM A105 Round Steel

- Chemical Composition:

- Carbon (C): The carbon content is relatively low, with a maximum of 0.35%. Carbon is a key element that affects the strength and hardness of the steel. A moderate amount of carbon in A105 provides a good balance between strength and ductility.

- Silicon (Si): The silicon content is up to 0.35%. Silicon helps to improve the oxidation resistance and hardenability of the steel.

- Manganese (Mn): Ranges from 0.6 to 1.05%. Manganese is an important alloying element that can enhance the strength and toughness of the steel, making it more suitable for various applications.

- Sulfur (S): The sulfur content is very low, not exceeding 0.050%. A low sulfur content helps to improve the weldability and ductility of the steel.

- Phosphorus (P): The phosphorus content is also controlled at a relatively low level, not exceeding 0.040%. Phosphorus can affect the toughness and ductility of the steel, so a lower content is preferred.

- Copper (Cu): The copper content is up to 0.4%. Copper can enhance the corrosion resistance of the steel to a certain extent.

- Nickel (Ni): The nickel content is up to 0.4%. Nickel can improve the toughness and ductility of the steel.

- Chromium (Cr): The chromium content is up to 0.3%. Chromium can enhance the hardness and wear resistance of the steel.

- Molybdenum (Mo): The molybdenum content is up to 0.12%. Molybdenum can improve the high-temperature strength and creep resistance of the steel.

- Vanadium (V): The vanadium content is up to 0.08%. Vanadium can refine the grain structure of the steel and improve its strength and toughness.

- Mechanical Properties:

- Tensile Strength: The tensile strength of A105 round steel is quite high, with a minimum of 485 MPa. This means it can withstand a large amount of tensile force without breaking, making it suitable for applications that require high strength.

- Yield Strength: The yield strength is at least 250 MPa. Yield strength is an important indicator of the material's ability to resist deformation. A higher yield strength indicates that the material is less likely to deform under load.

- Elongation: The elongation after fracture is not less than 22%. A higher elongation value indicates that the material has better ductility and can be deformed to a certain extent without cracking, which is beneficial for processing and forming.

- Reduction of Area: The reduction of area is not less than 30%, which reflects the material's ability to resist contraction and fracture during plastic deformation.

- Hardness: The hardness of A105 round steel is relatively low, with a maximum Brinell hardness of 187. A lower hardness makes the material easier to machine and process.

- Applications:

- Pipeline Systems: A105 round steel is widely used in pipeline systems, especially in high-pressure and high-temperature environments. It can be used to manufacture pipes, flanges, elbows, tees, and other pipeline components.

- Valve Industry: Due to its good mechanical properties and corrosion resistance, it is suitable for manufacturing valves and valve parts, such as valve bodies, valve stems, and valve seats.

- Pressure Vessel Components: It can be used to manufacture pressure vessel forgings, such as self-reinforced nozzles and nozzle necks, which require high strength and good ductility.

- General Machinery Parts: A105 round steel is also used in the manufacturing of general machinery parts, such as shafts, gears, bearings, and couplings, where its high strength and good machinability are required.

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