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AISI 4340 Tube

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AISI 4340 Tube

AISI 4340 Tube, SAE 4340 Seamless Pipe, ASTM A519 Grade 4340 Alloy Steel Tube Supplier

Pipelines & Tubing Industries is a leading manufacturer and supplier of AISI 4340 Tube, SAE 4340 Seamless Pipe, and ASTM A519 Grade 4340 Tube in India. Our high-quality AISI 4340 Alloy Steel Tube is produced using premium alloy elements such as nickel, chromium, and molybdenum, which provide exceptional strength, toughness, and resistance to wear.

The 4340 Chromoly Tubing is widely used in demanding industrial environments because of its excellent fatigue resistance and high tensile strength. These tubes are manufactured through advanced hot-rolled or cold-drawn processes to ensure consistent quality and superior mechanical performance.

Our AISI 4340 Steel Pipe is designed to deliver reliable performance in high-pressure and high-temperature applications. Due to its strong mechanical properties and high durability, the A519 Gr 4340 Steel Tube is widely used across industries such as oil & gas, aerospace, automotive, and power generation.

SAE 4340 Seamless Pipe & ASTM A519 Gr 4340 Steel Tube Supplier in India

We supply premium quality SAE 4340 Seamless Pipe manufactured without welding seams, ensuring excellent strength and durability. Seamless tubes provide superior performance in critical engineering applications where reliability and structural integrity are essential.

The ASTM A519 Grade 4340 Tube features excellent machinability and fabrication properties. It offers high tensile strength and yield strength, making it suitable for heavy-duty mechanical systems and stress-intensive environments.

Our AISI 4340 Alloy Steel Tube products can be supplied in various forms including round, square, and rectangular tubing. The tubes can also be heat treated, hardened, or annealed according to specific application requirements.

Types of AISI 4340 Tubing

We supply a wide range of AISI 4340 Tubes in multiple shapes and manufacturing processes:

  • AISI 4340 Alloy Steel Tube
  • SAE 4340 Seamless Pipe
  • ASTM A519 Grade 4340 Tube
  • 4340 Chromoly Tubing
  • A519 Gr 4340 Steel Tube
  • AISI 4340 Steel Pipe
  • AISI 4340 Square Tube
  • AISI 4340 Rectangular Tube
  • 4340 Square Tubing
  • SAE 4340 Pipe

These tubes are available in customized sizes, finishes, and lengths to meet various industrial requirements.

AISI 4340 Tube

AISI 4340 Tubes Specification

Specification ASTM A519 / ASME SA519
Size Range 1/2″ NB to 36″ NB
Thickness 3 mm – 12 mm
Schedule SCH 5, SCH 10, SCH 40, SCH 80, SCH 160, XS, XXS
Form Round, Square, Rectangular, Hydraulic
Length Single Random, Double Random, Cut Length
End Plain End, Beveled End, Threaded
Type Seamless, ERW, DOM, CDW, Welded
Surface Finish 2B, No.1, No.4, Mirror Finish
Delivery Condition Annealed, Pickled, Bright Annealed, Polished

AISI 4340 Tubes Chemical Composition

Element Content (%)
Carbon (C) 0.38 – 0.43
Manganese (Mn) 0.60 – 0.80
Silicon (Si) 0.15 – 0.35
Nickel (Ni) 1.65 – 2.00
Chromium (Cr) 0.70 – 0.90
Molybdenum (Mo) 0.20 – 0.30
Phosphorus (P) ≤ 0.035
Sulfur (S) ≤ 0.040

Mechanical Properties of AISI 4340 Tube

Property Value
Tensile Strength 1014 MPa
Yield Strength 835 MPa
Elongation 13%
Hardness 248 – 444 HB

Equivalent Grades of AISI 4340 Tubes

Standard Grade
ASTM 4340
EN 36CrNiMo4 / 1.6511
BS EN24 / 817M40
JIS SNCM439

Applications of AISI 4340 Alloy Steel Tube

The AISI 4340 Steel Pipe is widely used in industries that require high strength and durability.

Common applications include:

  • Oil and gas processing industries
  • Power generation plants
  • Chemical processing equipment
  • Aerospace components and aircraft landing gear
  • Automotive drive shafts and axles
  • Structural and mechanical engineering systems
  • Hydraulic and high-pressure systems

The excellent wear resistance and strength of 4340 Chromoly Tubing make it ideal for heavy-duty engineering applications.

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Why Choose Us?

  • Wide Range of A213 T11, T22, T91 Tubes & SA179/192 Welded Tubes
  • Certified A210 GR.C Carbon Steel Tubes for High-Temperature Use
  • Pan-India Supply Network: Mumbai, Delhi, Chennai, Kolkata, and more
  • Export-Ready Products Compliant with ASTM, ASME, and International Standards
  • Custom Sizes, Seamless & Welded Tubes, Competitive Pricing
  • Prompt Delivery & Dedicated Customer Support

Contact us today to get premium quality A213 and SA179/192 tubes for your industrial projects in India and global export markets.