Forged round bars from Super Metal are produced through an advanced open-die or closed-die forging process, ensuring a fine-grained structure and superior mechanical properties. These forged rounds offer excellent strength, impact resistance, and durability under extreme load conditions. The material is free from internal defects like porosity and segregation, making it suitable for applications in automotive, aerospace, oil & gas, power generation, heavy engineering, and more.
Material Specification Chart of 4140 / EN19 / 42crmo4 Round Bar
| Specifications | ASTM A182, ASME SA182 |
|---|---|
| Standards | EN, DIN, JIS, ASTM, BS, ASME, AISI |
| Range of Diameter | 5mm to 500mm |
| Finish | Bright, Black, Forged, Turned Bright |
| Length | 1000 mm Long To 6000 mm Long |
| Form | Round, Billet, Ingot, Forging Etc. |
SAE 4140/ EN19 / 42crmo4 Round Bars Grade
Country names
India
USA
German
British
Japan
China
Australia
Country standards
UNS
AISI
ASTM A29
DIN 17200
BS 970
JIS G4105
GB/T 3077
AS 1444
Grades
G41400
4140
4140
1.7225/ 42CrMo4
EN 19 / 42CrMo4
SCM440
42CrMo
4140
| Country names | India | USA | German | British | Japan | China | Australia | |
|---|---|---|---|---|---|---|---|---|
| Country standards | UNS | AISI | ASTM A29 | DIN 17200 | BS 970 | JIS G4105 | GB/T 3077 | AS 1444 |
| Grades | G41400 | 4140 | 4140 | 1.7225/ 42CrMo4 | EN 19 / 42CrMo4 | SCM440 | 42CrMo | 4140 |
Super Metal offers forged round bars in various alloy steel and carbon steel grades, including AISI 4140, EN19, 42CrMo4, C45, A105, and others. These forged rounds are available in a range of sizes—from 20 mm to 800 mm diameter—and are supplied in annealed, normalized, or quenched & tempered conditions. Custom dimensions, surface finishes (black, bright, rough machined), and tolerance levels are available on request to suit the needs of different industries.
The forged round bars supplied by Super Metal Manufacturing Co. are known for their high tensile strength, fatigue resistance, ductility, and hardness. They also exhibit excellent weldability and machinability. These properties make them ideal for manufacturing components such as shafts, gears, axles, crankshafts, connecting rods, and rollers that require high mechanical performance over extended service life.
Alloy Steel 4140 / EN19 / 42crmo4 Round Bars Dimensions Standard
Diameter or
Width
(mm)
Weight per meter
Sectional Area
Perimeter
Round
(kg)
Round
(cm²)
Round
(cm)
5.0
0.15
0.20
1.57
5.5
0.19
0.24
1.78
6.0
0.22
0.28
1.88
7.0
0.30
0.38
2.20
8.0
0.39
0.50
2.51
9.0
0.50
0.64
2.83
10
0.63
0.79
3.14
11
0.75
0.95
3.46
12
0.89
1.13
3.77
14
1.21
1.54
4.40
16
1.58
2.01
5.03
18
2.00
2.54
5.65
20
2.47
3.14
6.28
22
2.98
3.80
6.91
25
3.85
4.91
7.85
28
4.83
6.16
8.80
32
6.31
8.04
10.05
36
7.99
10.18
11.31
40
9.86
12.57
12.57
45
12.49
15.90
14.14
50
15.41
19.64
15.71
56
19.34
24.63
17.59
63
24.47
31.17
19.79
71
31.08
39.59
22.31
80
39.46
50.27
25.13
Frequently Asked Questions (FAQs) – Forged Round Bars
1. What are forged round bars used for?
Forged round bars are widely used in industries like automotive, oil & gas, aerospace, construction, and heavy machinery for manufacturing parts such as shafts, axles, gears, and crankshafts.
2. What is the difference between 4140, EN19, and 42CrMo4 round bars?
4140, EN19, and 42CrMo4 are equivalent alloy steel grades under different international standards (AISI, British, and DIN/EN respectively). They all offer high strength, toughness, and wear resistance.
3. Can I request custom sizes and finishes for forged bars?
Yes. Super Metal Manufacturing Co. offers custom diameters, cut-to-length sizes, and surface finishes such as bright, black, or machined, as per your project requirements.
4. Do the forged round bars come with certifications?
Absolutely. All forged bars are supplied with mill test certificates, and third-party inspection from agencies like SGS, BV, or TUV can be arranged upon request.
Applications & Uses of ASTM AISI 4140 Alloy Steel Round Bars
Application / Component
Use of 4140 Round Bar
Holder Blocks 4140 Round Bar used for Holder Blocks requiring high strength and dimensional stability. Mold Bases 4140 Round Bar used for Mold Bases offering toughness and wear resistance. Axle Shafts 4140 Round Bar used for manufacturing durable and impact-resistant Axle Shafts. Bolts & Fasteners 4140 Round Bar used for high-strength Bolts and Heavy-Duty Fasteners. Crankshafts 4140 Round Bar used for Crankshafts in engines due to superior fatigue strength. Couplings 4140 Round Bar used for Couplings where high tensile strength is required. Gears & Pinions 4140 Round Bar used for Gears, Pinions, and Sprockets in heavy machinery. Spindles 4140 Round Bar used for Machine Spindles and Lathe Spindles offering rigidity and precision. Piston Rods 4140 Round Bar used for Hydraulic Piston Rods and Rams due to toughness and machinability. Tool Holders 4140 Round Bar used for Tool Holders and Fixture Components in machining setups. Jigs & Fixtures 4140 Round Bar used for Jigs and Fixtures requiring high dimensional accuracy. Guide Rods 4140 Round Bar used for Precision Guide Rods and Linear Shafts. Collets & Chuck Bodies 4140 Round Bar used for Chuck Bodies, Collets, and Clamping Components. Hydraulic Shafts 4140 Round Bar used for Hydraulic Shafts & Components under high-pressure conditions. Logging Parts 4140 Round Bar used for Logging & Drilling Equipment due to its impact resistance. Conveyor Pins & Rolls 4140 Round Bar used for Conveyor Pins, Rolls, and Bearing Supports. Drill Collars & Tool Joints 4140 Round Bar used in Oilfield Tools such as Drill Collars and Tool Joints. Machine Components 4140 Round Bar used for Heavy Machine Components and Shafts. Gear Racks 4140 Round Bar used for Gear Racks and Power Transmission Systems. Forks & Levers 4140 Round Bar used for Forks, Levers, and Steering Components. Motor Shafts 4140 Round Bar used for Electric Motor Shafts requiring precise balancing. Tie Rods 4140 Round Bar used for Tie Rods in heavy-duty mechanical linkages. Camshafts 4140 Round Bar used for Camshafts with high surface hardness and strength. Reamer Bodies 4140 Round Bar used for Reamer Bodies and Boring Tools. Bearing Housings 4140 Round Bar used for Bearing Housings and Support Frames. Axles & Shafting 4140 Round Bar used for Axles and Power Transmission Shafting. Pump Shafts 4140 Round Bar used for Pump Shafts and Rotors under fluid pressure. Lathe Spindles 4140 Round Bar used for Lathe Spindles providing stability and smooth rotation. Die Holders 4140 Round Bar used for Die Holders and Press Tool Components. Brake Dies & Trim Dies 4140 Round Bar used for Brake Dies, Trim Dies, and Press Dies. Tooling Back-Up Plates 4140 Round Bar used for Back-Up Plates in Tooling Applications. Forming & Forging Dies 4140 Round Bar used for Forging Dies and Forming Tools requiring toughness. Hydraulic Press Parts 4140 Round Bar used for Hydraulic Press Columns, Rams, and Guides. Marine Shafts 4140 Round Bar used for Marine Propeller Shafts & Deck Equipment. Aerospace Tooling 4140 Round Bar used for Aerospace Fixtures and Assembly Tooling. Defence Components 4140 Round Bar used for Defence Hardware, Launch Tubes & Armament Parts. Power Plant Equipment 4140 Round Bar used for Turbine Shafts and Rotating Components in Power Plants. Oil & Gas Equipment 4140 Round Bar used for Oilfield Equipment, Wellhead Components & Drilling Tools. Construction Machinery 4140 Round Bar used for Excavator Pins, Loader Shafts & Heavy Construction Parts. Railway Components 4140 Round Bar used for Railway Axles, Brackets & Suspension Pins. Mining Equipment 4140 Round Bar used for Mining Shafts, Crusher Pins & Wear Parts. Windmill Shafts 4140 Round Bar used for Wind Turbine Shafts and Mechanical Hubs.
Countries we have exported our products to:
Turkey, Thailand, Bulgaria, Serbia, Mexico, Estonia, Trinidad & Tobago,Tunisia, New Zealand, Indonesia, Puerto Rico, Ireland, India, Morocco, Brazil, Lebanon, Hong Kong, Jordan, Ukraine, Switzerland, Czech Republic, Lithuania, Sri Lanka, Greece, Taiwan, Zimbabwe, Algeria, Romania, Mexico, Ghana, Italy, Philippines, Spain, United Kingdom, Finland, Azerbaijan, Japan, Macau, Israel, Saudi Arabia, Kenya, Bhutan, Poland, Poland, Costa Rica, Kuwait, Singapore, Pakistan, France, Colombia, Tibet, Bolivia, Portugal, Iraq, Australia, Kazakhstan, Nepal, Mongolia, Gambia, Malaysia, Chile, Germany, Slovakia, China, Bahrain, Denmark, Angola, Afghanistan, Peru, Austria, Ecuador, Gabon, Croatia, South Africa, Sweden, Chile, Hungary, United Arab Emirates, Argentina, Bangladesh, Oman, Egypt, United States, Belgium, Canada, Namibia, Norway, Qatar, Belarus, Netherlands.
Cities we have supplied our products to:
Bengaluru, Vung Tau, Nashik, Jaipur, Navi Mumbai, La Victoria, Al Jubail, Noida, Granada, Doha, Dammam, Ernakulam, Chandigarh, Santiago, Melbourne, Surat, Nagpur, Ranchi, Kanpur, Jakarta, Ahvaz, Indore, Jamshedpur, Muscat, Rajkot, Lahore, Chiyoda, Milan, Hong Kong, Riyadh, Houston, Busan, Calgary, Madrid, Visakhapatnam, Atyrau, Bhopal, Algiers, Colombo, Kolkata, Petaling Jaya, Dallas, London, Cairo, Thiruvananthapuram, Caracas, Howrah, Moscow, Port-of-Spain, Baroda, Mexico City, Gurgaon, Singapore, Aberdeen, Coimbatore, Kuala Lumpur, Perth, Ahmedabad, New York, New Delhi, Manama, Abu Dhabi, Montreal, Jeddah, Pune, Vadodara, Kuwait City, Chennai, Geoje-si, Tehran, Mumbai, Hanoi, Karachi, Pimpri-Chinchwad, Thane, Haryana, Ulsan, Seoul, Dubai, Ho Chi Minh City, Toronto, Hyderabad, Los Angeles, Faridabad, Lagos, Sydney, Courbevoie, Bangkok, Bogota, Rio de Janeiro, Ankara, Al Khobar, Ludhiana, Istanbul, Gimhae-si, Brisbane, Edmonton, Sharjah, Secunderabad.
Cities we have supplied our products to:
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| Diameter or Width (mm) |
Weight per meter | Sectional Area | Perimeter |
| Round (kg) |
Round (cm²) |
Round (cm) |
|
| 5.0 | 0.15 | 0.20 | 1.57 |
| 5.5 | 0.19 | 0.24 | 1.78 |
| 6.0 | 0.22 | 0.28 | 1.88 |
| 7.0 | 0.30 | 0.38 | 2.20 |
| 8.0 | 0.39 | 0.50 | 2.51 |
| 9.0 | 0.50 | 0.64 | 2.83 |
| 10 | 0.63 | 0.79 | 3.14 |
| 11 | 0.75 | 0.95 | 3.46 |
| 12 | 0.89 | 1.13 | 3.77 |
| 14 | 1.21 | 1.54 | 4.40 |
| 16 | 1.58 | 2.01 | 5.03 |
| 18 | 2.00 | 2.54 | 5.65 |
| 20 | 2.47 | 3.14 | 6.28 |
| 22 | 2.98 | 3.80 | 6.91 |
| 25 | 3.85 | 4.91 | 7.85 |
| 28 | 4.83 | 6.16 | 8.80 |
| 32 | 6.31 | 8.04 | 10.05 |
| 36 | 7.99 | 10.18 | 11.31 |
| 40 | 9.86 | 12.57 | 12.57 |
| 45 | 12.49 | 15.90 | 14.14 |
| 50 | 15.41 | 19.64 | 15.71 |
| 56 | 19.34 | 24.63 | 17.59 |
| 63 | 24.47 | 31.17 | 19.79 |
| 71 | 31.08 | 39.59 | 22.31 |
| 80 | 39.46 | 50.27 | 25.13 |
Frequently Asked Questions (FAQs) – Forged Round Bars
1. What are forged round bars used for?
Forged round bars are widely used in industries like automotive, oil & gas, aerospace, construction, and heavy machinery for manufacturing parts such as shafts, axles, gears, and crankshafts.
2. What is the difference between 4140, EN19, and 42CrMo4 round bars?
4140, EN19, and 42CrMo4 are equivalent alloy steel grades under different international standards (AISI, British, and DIN/EN respectively). They all offer high strength, toughness, and wear resistance.
3. Can I request custom sizes and finishes for forged bars?
Yes. Super Metal Manufacturing Co. offers custom diameters, cut-to-length sizes, and surface finishes such as bright, black, or machined, as per your project requirements.
4. Do the forged round bars come with certifications?
Absolutely. All forged bars are supplied with mill test certificates, and third-party inspection from agencies like SGS, BV, or TUV can be arranged upon request.
| Application / Component | Use of 4140 Round Bar |
|---|---|
| Holder Blocks | 4140 Round Bar used for Holder Blocks requiring high strength and dimensional stability. |
| Mold Bases | 4140 Round Bar used for Mold Bases offering toughness and wear resistance. |
| Axle Shafts | 4140 Round Bar used for manufacturing durable and impact-resistant Axle Shafts. |
| Bolts & Fasteners | 4140 Round Bar used for high-strength Bolts and Heavy-Duty Fasteners. |
| Crankshafts | 4140 Round Bar used for Crankshafts in engines due to superior fatigue strength. |
| Couplings | 4140 Round Bar used for Couplings where high tensile strength is required. |
| Gears & Pinions | 4140 Round Bar used for Gears, Pinions, and Sprockets in heavy machinery. |
| Spindles | 4140 Round Bar used for Machine Spindles and Lathe Spindles offering rigidity and precision. |
| Piston Rods | 4140 Round Bar used for Hydraulic Piston Rods and Rams due to toughness and machinability. |
| Tool Holders | 4140 Round Bar used for Tool Holders and Fixture Components in machining setups. |
| Jigs & Fixtures | 4140 Round Bar used for Jigs and Fixtures requiring high dimensional accuracy. |
| Guide Rods | 4140 Round Bar used for Precision Guide Rods and Linear Shafts. |
| Collets & Chuck Bodies | 4140 Round Bar used for Chuck Bodies, Collets, and Clamping Components. |
| Hydraulic Shafts | 4140 Round Bar used for Hydraulic Shafts & Components under high-pressure conditions. |
| Logging Parts | 4140 Round Bar used for Logging & Drilling Equipment due to its impact resistance. |
| Conveyor Pins & Rolls | 4140 Round Bar used for Conveyor Pins, Rolls, and Bearing Supports. |
| Drill Collars & Tool Joints | 4140 Round Bar used in Oilfield Tools such as Drill Collars and Tool Joints. |
| Machine Components | 4140 Round Bar used for Heavy Machine Components and Shafts. |
| Gear Racks | 4140 Round Bar used for Gear Racks and Power Transmission Systems. |
| Forks & Levers | 4140 Round Bar used for Forks, Levers, and Steering Components. |
| Motor Shafts | 4140 Round Bar used for Electric Motor Shafts requiring precise balancing. |
| Tie Rods | 4140 Round Bar used for Tie Rods in heavy-duty mechanical linkages. |
| Camshafts | 4140 Round Bar used for Camshafts with high surface hardness and strength. |
| Reamer Bodies | 4140 Round Bar used for Reamer Bodies and Boring Tools. |
| Bearing Housings | 4140 Round Bar used for Bearing Housings and Support Frames. |
| Axles & Shafting | 4140 Round Bar used for Axles and Power Transmission Shafting. |
| Pump Shafts | 4140 Round Bar used for Pump Shafts and Rotors under fluid pressure. |
| Lathe Spindles | 4140 Round Bar used for Lathe Spindles providing stability and smooth rotation. |
| Die Holders | 4140 Round Bar used for Die Holders and Press Tool Components. |
| Brake Dies & Trim Dies | 4140 Round Bar used for Brake Dies, Trim Dies, and Press Dies. |
| Tooling Back-Up Plates | 4140 Round Bar used for Back-Up Plates in Tooling Applications. |
| Forming & Forging Dies | 4140 Round Bar used for Forging Dies and Forming Tools requiring toughness. |
| Hydraulic Press Parts | 4140 Round Bar used for Hydraulic Press Columns, Rams, and Guides. |
| Marine Shafts | 4140 Round Bar used for Marine Propeller Shafts & Deck Equipment. |
| Aerospace Tooling | 4140 Round Bar used for Aerospace Fixtures and Assembly Tooling. |
| Defence Components | 4140 Round Bar used for Defence Hardware, Launch Tubes & Armament Parts. |
| Power Plant Equipment | 4140 Round Bar used for Turbine Shafts and Rotating Components in Power Plants. |
| Oil & Gas Equipment | 4140 Round Bar used for Oilfield Equipment, Wellhead Components & Drilling Tools. |
| Construction Machinery | 4140 Round Bar used for Excavator Pins, Loader Shafts & Heavy Construction Parts. |
| Railway Components | 4140 Round Bar used for Railway Axles, Brackets & Suspension Pins. |
| Mining Equipment | 4140 Round Bar used for Mining Shafts, Crusher Pins & Wear Parts. |
| Windmill Shafts | 4140 Round Bar used for Wind Turbine Shafts and Mechanical Hubs. |