AISI 4140 Forged Bars For Oil and Gas Industry
Description
AISI 4140 Forged Bars For Oil and Gas Industry
Introduction to AISI 4140 Forged Bars For Oil and Gas Industry
AISI 4140 alloy structural steel is an American standard (AISI/SAE 4140) medium carbon chromium molybdenum alloy structural steel. Its chemical composition mainly includes elements such as carbon, silicon, manganese, chromium, and molybdenum. After quenching and tempering heat treatment, this material has high strength, high hardenability, good toughness, and small quenching deformation, and is widely used in automotive, aerospace structural components, oil drilling tools, and various high-strength mechanical parts.
Chemical Composition
Mechanical properties of AISI 4140 For Oil and Gas Industry after quenching and tempering heat treatment
Classification by Shape
Round Steel/Round Bars: Cylindrical forged materials, the most common form, suitable for shaft parts, fasteners, etc.
Square Steel/Square Billets: Square forged materials, suitable for module, mechanical parts processing
Forgings: Including stepped shafts, cylindrical parts, disc parts, ring parts (ring rolling), modules, and other special-shaped forgings
Forged Tubes: Tubular forged materials, used in special fields such as oil wellhead equipment
Our company’s available size range:
Forged round steel: Φ80 – 1300 mm
Forged square billets: 80 – 1000 mm
Length: 1 – 12 meters per piece, can be delivered to customer’s specified length
Maximum single piece weight: ≤ 35 tons
Ring rolling parts: Weight ≤ 25 tons, outer diameter ≤ 6.8 meters, height ≤ 1.5 meters
Stepped shafts and rolls: Turning diameter ≤ 1200 mm, single piece weight ≤ 30 tons
Main Heat Treatment Processes
Annealing
Normalizing
Quenching
Tempering
What are the advantages of AISI 4140 forged bars For Oil and Gas Industry?
AISI 4140 forged parts, through forging processing, make the internal structure of the metal more compact, refine the grains, and enhance the material’s strength. Hot forging promotes grain refinement, enabling the material to achieve the maximum possible strength and consistency, and reducing variations among parts. This steel features an excellent overall combination of high strength, high toughness, wear resistance, and fatigue strength. It can be heat-treated through quenching and tempering to achieve multi-level strength control within the hardness range of 22 to 36 HRC, adapting to different load conditions and meeting the diverse performance requirements of high-load structural components and downhole tools. AISI 4140 steel has a high yield rate and good processing performance.
What are the applications in the oil and gas industry as semi-finished products?
Drill collars: After quenching and tempering treatment, they can reach 40 HRC, with a yield strength of 655 MPa, meeting the high-load conditions downhole.
Blowout preventer (BOP) components: Such as the body of the square drill pipe swivel valve, etc.
High-pressure valve bodies
Casing hangers, riser joints
Manifolds, high-strength flanges and joints
Drill pipe joints
What are the production advantages of our company?
- Our company uses the electric furnace + LF refining + VD vacuum degassing process to produce, ensuring no raw material defects such as pores, sand holes, and cracks, low sulfur and phosphorus and other harmful components, and a forging ratio of ≥ 4:1. The raw materials are repeatedly fully upset and drawn to eliminate defects such as pores, refine grains, and make the structure more dense.
- Each product undergoes ultrasonic flaw detection.
- We can provide various delivery conditions according to customer requirements, including normalizing, annealing, quenching and tempering, as well as black skin, grinding, rough turning, and other surface treatments. We can undertake various special-shaped forgings (stepped shafts, cylindrical parts, disc-shaped parts, ring-shaped parts, modules, three-way valve bodies, etc.), achieving “guaranteed composition, guaranteed flaw detection, guaranteed performance”.
