About D2 Tool & Alloy Steel Round Bars

IMI Alloys India LLP is a magnificent producer and seller of D2 Tools and Alloy Steel Round Bar. We are producing the best materials worldwide. We aim to provide our customers with the materials as per their preferences. We satisfy our customers’ needs by providing them with the materials per their choice of dimensions, sizes, and shapes. We provide the best quality of material that’s why our customer returns to us. A D2 Steel Bar is a good solidified tooling steel grade. The elevated carbon chromium-containing Device Steel D2 round bar shows high wear and scraped area resistance properties.

D2 steel is an air solidifying, high-carbon, high-chromium tool steel. It has high wear and scraped safe area properties. D2 steel appears minor mutilation on adjusting solidifying. D2 steel’s elevated chromium substance gives it mild corrosion standing up to properties within the hardened condition. Cold-work instrument steels incorporate the high-carbon, high-chromium steels or bunch D steels. The exceptionally high chromium substance in D2 Steel Round Bars gives the amalgam way better resistance to erosion than most device steels.

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Tool & Alloy steel D2 Round Bars

In this way, they are empowering the D2 Round bars to be semi-stainless steel grade. Frequently machined in a toughened condition, The D2 tool Steel round bars illustrate minor twisting on rectifying solidifying. D2 tool steel round bars might be utilized for long-run tooling applications, especially in those ranges where wear resistance is regarded to be an imperative characteristic, such as blanking or shaping passes on as well as thread rolling dies.

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IMI Alloys India LLP designs the best D2 tools and alloy steel rods used in many industrial applications such as making knife-edge mold, scissors, circular saw blades, metal stamping mounds. Doing hard work or hot work dressing dies, sides of rollers, screw lines, lines die, transformer core stamping dies, rolled knives, steel tube forming rollers. We are doing all the quality tests on our products for their certification and customers satisfaction. These bars contain superior working abilities and corrosion resistance properties that help them work in different surroundings. We are always using the best packing material for the safety and security of our bars and products.

A2 vs D2 tool steel round bars?

High-carbon, high-chromium tool steels A2 and D2 are both known for their outstanding wear resistance and hardness. But the two differ substantially in important ways. Air-hardening tool steel with a low chromium content (5-7%) and a high degree of toughness is known as A2. For tools like punches, dies, and shear blades that need to balance hardness and wear resistance, it is frequently utilised. A high-chromium, high-carbon tool steel called D2 steel, on the other hand, is acknowledged for its remarkable wear resistance and hardness. It is relatively weakly tough and contains 11–13% chromium. Cold work punches and dies are only a couple examples of tooling that frequently uses it and demands a high level of wear resistance. Hence, A2 steel is a good choice for tooling that requires a balance of wear resistance and toughness, while D2 steel is a better option for tooling that requires a high degree of wear resistance.

What are the properties of aisi d2 tool steel round bars?

AISI D2 tool steel round bar is a high-carbon, high-chromium alloy steel known for its exceptional wear resistance and hardness. Some of its key properties include a Rockwell hardness of 60-62 HRC, and excellent wear resistance due to its high chromium content, which forms a hard, abrasion-resistant surface. Yet, it has relatively low toughness which makes it more brittle than other tool steels. AISI D2 tool steel has good corrosion resistance, but it is not as corrosion-resistant as stainless steel. Moreover, it has excellent edge retention, making it ideal for cutting tools and other applications that require a sharp edge. Usually, it is hardened by oil quenching and air cooling, which results in a Rockwell hardness of 60-62 HRC. It is rather difficult to grind, due to its high hardenability and high wear resistance.

What is the manufacturing process of d2 hot rolled alloy steel round bar?

The manufacturing process of the D2 hot rolled alloy steel round bar begins with the selection of high-quality raw materials. The steel is then melted in an electric arc furnace and is poured into a continuous casting machine to form ingots. The ingots are then heated and rolled into blooms, billets or slabs. After that, the slabs are reheated and hot rolled into D2 hot-rolled alloy steel round bars using a series of rolling mills. The final product is cooled and then inspected for quality and consistency. The D2 steel is typically heat-treated to achieve its final hardness and other mechanical properties, which is typically done by oil quenching and air cooling, resulting in a Rockwell hardness of 60-62 HRC. This process is also called as hot working process.

Tool & Alloy steel Round Bars Stockist

Specifications of D2 Tool & Alloy Steel Round Bars

  • Standard : ASTM A681, ASME SA681
  • Dimensions : EN, DIN, JIS, ASTM, BS, ASME, AISI
  • Form : Round
  • Diameter : 10 mm ~ 900 mm
  • Size : 0.08 mm to 25.00 mm
  • Diameter Range : 0.040 mm – 12 mm (0.0016” – 0.4724”)
  • Application : Lathe Tools, Milling Cutter, Cutter Blades, Boring Tools, Twist drills, Milling Knives, Reamers, Taps, Metalcutting saws, Screw Cutting Tools, File Cutter’s Chissels, Drills, Hobs, Drill Bits, Tread cutting tools etc

Equivalent Grades of D2 Tool & Alloy Steel Round Bars

Country USA German Japan
Standard ASTM A681 DIN EN ISO 4957 JIS G4404
Grades D2 1.2379/X153CrMo12 SKD11

Chemical Composition of D2 Tool & Alloy Steel Round Bar

ASTM A681 C Mn P S Si Cr V Mo
D2 1.4 1.6 0.1 0.6 0.03 0.03 0.1 0.6 11 13 0.5 1.1 0.7 1.2
DIN ISO 4957 C Mn P S Si Cr V Mo
1.2379/X153CrMo12 1.45 1.6 0.2 0.6 0.03 0.03 0.15 1.6 11 13 0.7 1 0.7 1
JIS G4404 C Mn P S Si Cr V Mo
SKD11 1.4 1.6 0.6 0.03 0.03 0.4 11 13 0.2 0.5 0.8 1.2

Mechanical Properties of D2 Tool & Alloy Steel Round Bars

Mechanical Properties Metric Imperial
Hardness, Knoop (converted from Rockwell C hardness) 769 769
Hardness, Rockwell C 62 62
Hardness, Vickers 748 748
Izod impact unnotched 77.0 J 56.8 ft-lb
Poisson’s ratio 0.27-0.30 0.27-0.30
Elastic modulus 190-210 GPa 27557-30457 ksi

Thermal Properties of D2 Tool & Alloy Steel Round Bars



T (°C)


Thermal expansion 10.4 x 10-6/ºC 20-100

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Applications For D2 Tool & Alloy Steel Round Bars


Generally, D2 tool steels are used for long run tooling applications, Some main applications for D2 Tool & Alloy Steel Round Bars materials are:

  • Blanking Dies
  • Forming Dies
  • Coining Dies
  • Slitting Cutters
  • Heading Tools
  • Long Punches
  • Forming Rolls
  • Edging Rolls
  • Master Tools
  • Beading Rolls
  • Intricate Punches
  • Extrusion Dies
  • Drawing Dies
  • Lamination Dies
  • Thread Rolling Dies
  • Burnishing Tools

Export Destinations for D2 Tool & Alloy Steel Round Bars


Iraq, Mexico, Hong Kong, Ecuador, Colombia, Austria, Lithuania, Ukraine, Gambia, Mexico, Morocco, Canada, Bhutan, Malaysia, Qatar, Azerbaijan, Czech Republic, Pakistan, Hungary, South Africa, Indonesia, Norway, United Arab Emirates, Poland, Afghanistan, Singapore, Ghana, Ireland, Bahrain, Chile, Slovakia, Finland, Peru, Kuwait, Iran, Taiwan, Brazil, Germany, France, Netherlands, Iran, Turkey, Poland, Thailand, South Korea, Algeria, Oman, Libya, Belarus, China, Spain, Namibia, Venezuela, Nigeria, Argentina, Belgium, Bangladesh, Serbia, Nepal, Bulgaria, Japan, Estonia, Sweden, Russia, Israel, New Zealand, Vietnam, Greece, Tunisia, Saudi Arabia, Croatia, Romania, Mongolia, Sri Lanka, Angola, Italy, Tibet, Philippines, Puerto Rico, Australia, India, Portugal, Jordan, Denmark, Macau, Trinidad & Tobago, Egypt, Nigeria, Kenya, Chile, Costa Rica, United States, Yemen, Zimbabwe, Switzerland, Kazakhstan, United Kingdom, Bolivia, Lebanon, Gabon.


Kolkata, Secunderabad, Petaling Jaya, Ahmedabad, Bangkok, Mexico City, Bhopal, Manama, Houston, Sydney, Atyrau, Noida, La Victoria, Kuwait City, Cairo, Al Jubail, Karachi, Madrid, Thane, Singapore, Chandigarh, Riyadh, Calgary, Caracas, Ludhiana, Courbevoie, Kuala Lumpur, Rio de Janeiro, Doha, New Delhi, Ernakulam, Colombo, Jakarta, Pimpri-Chinchwad, Bengaluru, Jaipur, Edmonton, Haryana, Dallas, Ulsan, Abu Dhabi, Brisbane, Montreal, Indore, Aberdeen, Dubai, Gimhae-si, Hyderabad, Muscat, Perth, Tehran, Geoje-si, Rajkot, Nagpur, Thiruvananthapuram, New York, Algiers, Seoul, Moscow, Chennai, Los Angeles, Baroda, London, Istanbul, Hong Kong, Granada, Lagos, Surat, Gurgaon, Visakhapatnam, Port-of-Spain, Jeddah, Mumbai, Milan, Toronto, Kanpur, Hanoi, Melbourne, Ahvaz, Ankara, Dammam, Vadodara, Vung Tau, Jamshedpur, Howrah, Al Khobar, Ho Chi Minh City, Nashik, Sharjah, Bogota, Faridabad, Coimbatore, Busan, Ranchi, Navi Mumbai, Chiyoda, Pune, Santiago.

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IMI ALLOYS INDIA LLP is a notable manufacturer, supplier, stockist, and exporter of bars – round bars, square bars, flat bars, etc. in various materials like Tool Steel, Alloy Steel, and High-Speed Steel in Mumbai, India. We are authorized dealers of Graphite India Limited (POWMEX STEELS DIVISION) and also the only authenticated stockist of Nachi Fujikoshi Corp in India for their High-Speed Steel, Powder Metallurgy, Tool Steel, and Alloy Steel Products.
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