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4140 alloy round bar

4140 ALLOY Round Bar Specifications

Product Name 4140 ALLOY  Round bars
Category  Alloy Steel Round Bars
Technique Cold Rolled


What is 4140 ALLOY Round bar?

Dmsons Metal Pvt. Ltd. is a highly regarded manufacturer and supplier known for producing top-quality 4140 ALLOY Round bars. SAE 4140 steel is a low-alloy steel composed of iron, carbon, and other alloying elements. It is considered a medium-carbon steel known for its good strength, toughness, and wear resistance. 4140 alloy is also referred to as chromium-molybdenum steel due to the presence of chromium and molybdenum as the primary alloying elements.

4140 ALLOY Round bar is a versatile steel that can undergo heat treatment to achieve a wide range of mechanical properties. It finds common use in the manufacturing of gears, shafts, spindles, and various machine parts. Additionally, it is widely employed in the oil and gas industry for downhole tools and wellhead components. One of the distinctive properties of 4140 ALLOY Steel is its ability to be heat-treated to high strength levels while maintaining good toughness and ductility. This makes it a preferred choice for applications that require a balance of strength and toughness.

4140 ALLOY Round bars are also renowned for its excellent weldability and machinability. It can be welded using common welding methods and machined using conventional techniques. However, it is important to note that its high hardenability can make machining challenging in the hardened and tempered condition. 4140 Alloy bars adhere to the ASTM A29/A29M standard and are available in a wide range of sizes and shapes. It is commonly used in various industries such as construction, mining, oil and gas, and transportation.

4140 ALLOY Equivalent Grades

USA Din BS BS Japan
ASTM A29 DIN 1654 EN 10084 BS 970 JIS G4103
4140 1.6523/21NiCrMo2 1.6523/21NiCrMo2-2 805M20 SNCM220

4140 ALLOY Chemical Composition

Grade  C Si Ni P Mn Cr S Mo
SAE – 4140 .38 – .43 .20 – .35 .035 .035 .75 – 1.00 .80 – 1.10 .15 – .25


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

‎4140 ALLOY Round Bars Price in India

If you are looking to purchase 4140 ALLOY Round bars, it’s important to know the current market price. The 4140 ALLOY Round bars price can vary depending on the size, thickness, and quality of the material. Dmsons offers the best price in the market and ready stock available are listed below: –

Description Price
4140 cold drawn steel round bar Rs 65,000 / Metric Ton( FOB Price)
Black hot rolled aisi 4140 carbon alloy steel round bar Rs 68,000 / Metric Ton( FOB Price)
42CrMo4 4140 1.7225 42CrMo4 Alloy Steel Round Bar Price per kg Rs 63,000 / Metric Ton( FOB Price)
cold drawn steel bar 4140 sale 51mm round steel Rs 62,000 / Metric Ton( FOB Price)
sae 4140 round steel price Rs 65,000 / Metric Ton( FOB Price)

Please note that the prices may vary based on the quantity, location, and other factors. For accurate pricing and further details, please feel free to contact us.

4140 ALLOY Round Bar Applications 

4140 alloy round bars find extensive applications in a wide range of industries due to their excellent combination of mechanical properties. Some of the common applications include:

  1. Automotive Components: 4140 alloy round bars are employed in the automotive industry to manufacture critical components like crankshafts, axles, and connecting rods. Their strength and toughness contribute to the reliable performance of these parts.
  2. Manufacturing Machinery: 4140 alloy round bars are commonly used in the manufacturing of machine components like gears, shafts, spindles, and bolts. Their high strength and toughness make them suitable for heavy-duty machinery.
  3. Tool and Die Making: Due to their good wear resistance and machinability, 4140 alloy round bars are used in tool and die making for various metalworking processes, including forging, extrusion, and molding.
  4. Aerospace Applications: 4140 alloy round bars find use in the aerospace sector for manufacturing parts that require high strength-to-weight ratios, such as landing gear components and aircraft fittings.
  5. Construction and Engineering: In construction projects, 4140 alloy round bars are employed for reinforcing concrete structures, providing added strength and stability.
  6. Marine and Shipbuilding: The marine industry uses 4140 alloy round bars for propeller shafts, shipbuilding, and other marine components that require corrosion resistance and high strength.
  7. Power Generation: The power generation industry utilizes 4140 alloy round bars in the production of turbine components, generator shafts, and other parts that require resistance to high temperatures and stresses.
  8. Oil and Gas Industry: In the oil and gas sector, 4140 alloy round bars are utilized in the construction of downhole tools, drill collars, and wellhead components. The steel’s ability to withstand high pressure and harsh environments makes it ideal for these applications.
  9. Mining Equipment: 4140 alloy round bars are used in the manufacturing of mining equipment, such as rock crushers, to handle heavy loads and abrasive conditions.
  10. Agricultural Machinery: In agricultural applications, 4140 alloy round bars are used for manufacturing durable components in farm machinery, such as tractor axles and crankshafts.

These are just a few examples of the diverse applications of 4140 alloy round bars. Their versatility, strength, toughness, and other beneficial properties make them a preferred choice for a wide array of industrial uses.

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About Company

Dmsons Metal Pvt. Ltd. is a leading company specializing in the manufacturing, supplying, wholesaling, and stock holding of 4140 ALLOY Round bars and sheets. With a strong reputation in the industry, Dmsons Metal has established itself as a prime manufacturer and supplier of high-quality 4140 ALLOY sheets. The company is known for its commitment to delivering products that meet the highest standards of quality, durability, and performance. With a dedicated team of experts and state-of-the-art manufacturing facilities, Dmsons Metal Pvt. Ltd. ensures the production of 4140 ALLOY Round bars that possess exceptional mechanical properties, including high tensile strength and impact resistance. As a reliable wholesaler and stockist, the company maintains a comprehensive inventory of 4140 ALLOY sheets, allowing for prompt and efficient order fulfilment. With a customer-centric approach, competitive pricing, and a strong focus on customer satisfaction, Dmsons Metal Pvt. Ltd. has become a trusted partner for clients seeking top-quality 4140 ALLOY Round bars and sheets.

Market Area

We Supply 4140 ALLOY Round BarsPlates & Sheets  Plates in listed cities in India: –
Mumbai, Bengaluru, Chennai, Hyderabad, Kolkata, New Delhi, Pune, Ahmedabad, Jaipur, Surat, Salem, Gandhinagar, Bhiwandi, Tiruppur, Sivakasi, Jamnagar, Thiruvananthapuram, Rajahmundry, Bhubaneswar, Vijaywada, Firozabad, Bokaro Steel City, Rajkot, Bharuch, Panna, Raipur, Cochin, Ludhiana, Panipat, Durgapur, Peenya, Pimpri-Chinchwad, Channa Patna, Kharagpur, Nashik, Bareilly, Varanasi, Haldia, Rourkela, Bangalore, Moradabad, Indore, Visakhapatnam, Trivandrum, Pithampur, Dibrugarh, Angul, Gwalior, Coimbatore, Kannur, Nagpur, Vadodara, Rudrapur, Noida, Agra, Bhagalpur, Jamshedpur, Bhilai, Ratnagiri, Kanpur, Thane, Bhopal, Durg-Bhilainagar, Jabalpur, Lucknow, Ghaziabad

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Please note that Inconel, Incoloy, and Monel are registered trademarks of the Special Metals Group of Companies, Hastelloy is a registered trademark of Haynes International, 254 SMO is a trademark owned by Outokumpu Stainless, Hardox® is a registered trademark of SSAB, and Sanicro 28 is a registered trademark of Sandvik AB. We do not claim any ownership or association with these trademarks and they are used only for informational purposes.