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AISI 4140 Round Bars

Buy Top Quality AISI 4140 Round Bar at Ferrite Structural Steels Pvt Ltd. – India’s Leading Supplier, Manufacturer and Exporter of MS Round Bars.

AISI 4140 Round Bars

AISI 4140 round bars are a high-strength alloy steel popular for their excellent toughness, high fatigue strength, and abrasion resistance. Composed of chromium, molybdenum, and manganese, this steel is known for its ability to withstand the rigors of extreme environments and demanding applications. AISI 4140 is often used in the automotive, oil and gas, and aerospace industries for components such as gears, bolts, and crankshafts that require high tensile strength and toughness. Its versatility also extends to applications in tooling and dies where resistance to wear and impact is crucial.

Ferrite Structural Steels Pvt Ltd., as a major manufacturer and supplier, excels in providing AISI 4140 round bars that meet global quality standards. The company leverages advanced manufacturing technologies and stringent quality control measures to ensure that each product delivers superior performance and reliability. With a focus on customer satisfaction and technical excellence, Ferrite Structural Steels Pvt Ltd. continues to be a leader in the steel industry, offering innovative solutions and tailored products to meet the complex demands of its diverse client base.

AISI 4140 Round Bar Specifications

Product Name AISI 4140 Round Bar
Brand Ferrite Structural Steels Pvt. Ltd.
Minimum Order Quantity 1 Ton
Material Mild Steel
Finish Hot-rolled, galvanized, or as specified by customer

AISI 4140 Round Bar Size Chart

Size (mm) Average Weight (KG/MTR) Average Weight (KG/FT)
10 0.62 0.18
12 0.9 0.3
14 1.2 0.4
16 1.6 0.5
18 2 0.6
20 2.5 0.8
22 3 0.9
24 3.56 1.08
25 3.9 1.2
28 4.8 1.5
30 5.55 1.69
32 6.3 1.9
34 7.14 2.18
36 8 2.44
40 9.9 3
45 12.49 3.81
50 15.4 4.7
56 19.34 5.89
60 22 6.8

 

AISI 4140 Equivalent grades

Country USA German British Japan China Australia
Standard ASTM A29 DIN 17200 BS 970 JIS G4105 GB/T 3077 AS 1444
Grades 4140 1.7225/
42CrMo4		 42CrMo4 SCM440 42CrMo 4140

 

AISI 4140 Chemical composition

Standard Grade C Mn P S Si Cr Mo
ASTM A29 4140 0.38-0.43 0.75-1.00 0.035 0.040 0.15-0.35 0.8-1.10 0.15-0.25
EN 10083/EN 10250 42CrMo4/1.7225 0.38-0.45 0.6-0.9 0.035 0.035 0.4 0.9-1.2 0.15-0.30
JIS G4105 SCM440 0.38-0.43 0.60-0.85 0.03 0.03 0.15-0.35 0.9-1.2 0.15-0.30

 

AISI 4140 Mechanical Properties

Properties Metric Imperial
Tensile strength 655 MPa 95000 psi
Yield strength 415 MPa 60200 psi
Bulk modulus (typical for steel) 140 GPa 20300 ksi
Shear modulus (typical for steel) 80 GPa 11600 ksi
Elastic modulus 190-210 GPa 27557-30458 ksi
Poisson’s ratio 0.27-0.30 0.27-0.30
Elongation at break (in 50 mm) 25.70% 25.70%
Hardness, Brinell 197 197
Hardness, Knoop (converted from Brinell hardness) 219 219
Hardness, Rockwell B (converted from Brinell hardness) 92 92
Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) 13 13
Hardness, Vickers (converted from Brinell hardness) 207 207
Machinability (based on AISI 1212 as 100 machinability) 65 65

Key Features and Benefits

  1. Alloy Steel Composition: AISI 4140 is an alloy steel that includes chromium, molybdenum, and manganese, enhancing its overall strength, toughness, and wear resistance.
  2. High Tensile Strength: These bars boast high tensile strength, making them suitable for applications requiring robust, durable materials.
  3. Excellent Toughness: AISI 4140 maintains excellent toughness at high hardness, providing essential durability under impact and stress.
  4. Outstanding Hardness and Abrasion Resistance: Hardened and tempered AISI 4140 can achieve high hardness levels, contributing to excellent abrasion resistance.
  5. Weldability: With the proper preheating and post-weld heat treatment, AISI 4140 can be welded with relative ease, allowing for the construction of complex assemblies.
  6. Durability in Harsh Conditions: The robust nature of AISI 4140 ensures that it can withstand harsh operating conditions, making it ideal for heavy-duty applications.
  7. Long Service Life: The high strength and wear resistance of AISI 4140 contribute to a longer service life of parts and components, reducing downtime and maintenance costs.
  8. Cost-Effectiveness: Although it is an alloy steel, AISI 4140 is relatively cost-effective for applications requiring its specific properties, providing good value for the investment.
  9. Customizability Through Heat Treatment: The ability to tailor the mechanical properties through various heat treatments allows engineers to optimize AISI 4140 for specific uses, enhancing performance in targeted applications.

Applications of AISI 4140 Bar

Manufacturing and Industrial:

  • Gears and Shafts: Commonly used in the production of industrial gears and shafts where strength and impact resistance are critical.
  • Axles and Bolts: Ideal for creating axles, bolts, and other hardware that require a medium level of strength and substantial impact resistance.
  • Crankshafts: Used in manufacturing crankshafts for vehicles and machines, providing the necessary toughness and durability.

Engineering and Construction:

  • Building Support Structures: Suitable for construction applications that demand high strength, such as support beams, frames, and structural components.
  • Heavy Equipment Manufacturing: Used in the manufacturing of components for heavy machinery used in construction and agriculture.

Oil and Gas Industry:

  • Oil Drill Bits and Tooling: AISI 4140 is used in the oil and gas industry for producing drill bits and other tooling that require robustness against impacts and stress.

Agricultural Equipment:

  • Farm Machinery Components: Employed in the production of durable components for agricultural machinery, such as gears, axles, and shafts.

Sporting Goods:

  • Sports Equipment: Used in the manufacture of high-strength sporting equipment like weightlifting bars, due to its ability to handle stress and impact.

Metal Products:

  • Forged Metal Goods: AISI 4140 is often chosen for the forging of metal products like flanges, fittings, and valves that need medium carbon steel with good strength.

Why Choose Ferrite’s AISI 4140 Round Bar?

Choosing Ferrite’s AISI 4140 Round Bars means selecting a product known for its reliability, durability, and performance in challenging environments. At Ferrite Structural Steels Pvt Ltd, we specialize in producing high-quality AISI 4140 Round Bars using meticulous manufacturing processes that adhere to strict quality standards. Each bar undergoes rigorous testing to ensure it meets our high standards, guaranteeing that our customers receive only the best products.

We are committed to providing not only top-quality steel but also exceptional customer service. Our team is dedicated to assisting you in finding the perfect steel solutions for your projects, ensuring that all your specifications and requirements are met efficiently. Contact us today to discuss your needs and request a quote. We are here to support your projects with our reliable and high-performing products.

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