Steel circle ASTM A105 / 1.0432

Steel circle ASTM A105 / 1.0432

Steel circle ASTM A105 (1.0432) is a carbon structural steel designed for manufacturing flanges, valves, pipeline fittings, and other components operating under high pressure and elevated temperatures. This material is known for its high strength, good weldability, and machinability, making it a popular choice in the petrochemical, gas, and power industries.

General Technical Characteristics

Key properties of ASTM A105 (1.0432) steel:

• Steel type: carbon steel for hot and cold processing.
• Yield strength: ≥ 250 MPa
• Tensile strength: 485-655 MPa
• Operating temperature: from -30°C to +450°C
• Hardness (HBW): ≤ 187 HB

Applications of ASTM A105 (1.0432) Steel

Due to its mechanical properties, 1.0432 is widely used in:

• Oil and gas industry – production of pipeline fittings, flanges, and valves.
• Chemical and petrochemical industry – high-pressure components.
• Power plants – steam boilers, heat exchangers, and piping systems.
• Mechanical engineering – shafts, couplings, valve bodies, and other machine components.

Key Features of ASTM A105 (1.0432) Steel

✅ High strength and impact resistance – ensures reliability under heavy loads.
✅ Good weldability – easy to work with using various welding techniques.
✅ Moderate corrosion resistance – suitable for use in the oil and gas sector.
✅ Excellent machinability – suitable for mechanical and thermal processing.

Chemical Composition of ASTM A105 (1.0432) Steel

The composition ensures the necessary mechanical and operational properties:

• Carbon (C): max. 0.35%
• Manganese (Mn): 0.60-1.05%
• Silicon (Si): 0.10-0.35%
• Phosphorus (P): ≤ 0.035%
• Sulfur (S): ≤ 0.040%
• Molybdenum (Mo): ≤ 0.12%
• Chromium (Cr): ≤ 0.30%
• Copper (Cu): ≤ 0.40%
• Nickel (Ni): ≤ 0.40%

Mechanical Properties of ASTM A105 Steel

• Yield strength: ≥ 250 MPa
• Tensile strength: 485-655 MPa
• Elongation: ≥ 22%
• Impact toughness: ≥ 27 J/cm² at -30°C
• Hardness (HBW): ≤ 187 HB

Advantages of ASTM A105 (1.0432) Steel Round Bar

✔ Stable performance at high temperatures – ideal for high-pressure and heat-exposed components.
✔ Cost-effective and widely available – a common choice due to its excellent price-performance ratio.
✔ High strength and plasticity – ensures durability in critical applications.
✔ Good machinability – heat treatment improves mechanical properties.

This steel is an optimal choice for manufacturing flanges, pipeline fittings, high-load machine components, and engineering parts, operating in demanding conditions.

ASTM A105 / 1.0432 Steel Wheel Delivery Forms