4140 / EN19 / 42crmo4 Round Bars

Super Metal Manufacturing Co. is a leading manufacturer, stockist and exporter of high-quality 4140 / EN19 / 42crmo4 Round Bars, specializing in providing premium alloy steel products to a diverse range of industries across the globe. With a legacy of excellence since 1965, we have established ourselves as a trusted name in the production and export of alloy steel round bars. Our products are used in various applications, including defense, automotive, aerospace,heavy machinery and construction, thanks to their exceptional strength, durability, and performance.

4140 / EN19 / 42crmo4 Round Bars, a versatile alloy steel, is known for its toughness, high fatigue strength, and ability to withstand harsh conditions. It contains chromium and molybdenum as its primary alloying elements, offering superior resistance to wear and impact. This makes 4140 / EN19 / 42crmo4 Round Bars ideal for use in applications requiring high tensile strength, such as gears, shafts, and axles. Additionally, 4140 / EN19 / 42crmo4 Round Bars is heat-treatable, making it suitable for a wide range of manufacturing processes, including forging, welding, and machining.

4140 / EN19 / 42crmo4 Round Bars are a high-grade alloy steel, renowned for their excellent combination of strength, toughness, and hardenability. They are highly resistant to wear, fatigue, and impact, making them ideal for high-stress applications in industries like defense, automotive, aerospace,heavy machinery and construction. These round bars are commonly used in the production of crankshafts, axles, gears, and other components that require high-performance materials capable of withstanding extreme loads and harsh environments.

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

4140 / EN19 / 42crmo4 Round Bars are product offered by Super Metal Manufacturing Co., providing outstanding mechanical properties, particularly in applications involving high-impact loads and high-temperature environments. This alloy steel contains chromium and carbon, which enhances its hardenability and strength. As a result, 4140 / EN19 / 42crmo4 Round Bars are widely used in the manufacturing of machine components such as shafts, bolts, and hydraulic parts. These round bars offer excellent toughness, corrosion resistance, and wear resistance, making them a preferred choice in industries like defense, automotive, aerospace,heavy machinery and construction

At Super Metal Manufacturing Co., we are proud to export our 4140 / EN19 / 42crmo4 Round Bars to a wide range of countries, including Oman, Qatar, Kuwait, Spain, UAE, Saudi Arabia, Japan, Germany, the United States, the United Kingdom, South Korea, South Africa, and many more worldwide. Our customers trust us for our commitment to providing top-quality alloy steel products that meet international standards. We ensure timely delivery and reliable service, ensuring our clients’ projects and production schedules are never delayed.

Alloy Steel 4140 / EN19 / 42crmo4 Round Bars Dimensions Standard

Diameter or Width (mm)	Weight per meter	Sectional Area	Perimeter
Diameter or Width (mm)	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 – 4140 / EN19 / 42CrMo4 Round Bars

1. What are the chemical compositions of these steel grades?

AISI/SAE 4140 typically contains Carbon (0.38–0.43%), Chromium (0.80–1.10%), and Molybdenum (0.15–0.25%), along with Silicon, Manganese, Sulfur, and Phosphorus in standard limits. EN19 and 42CrMo4 have similar compositions with slight variations.

2. What heat treatment processes are commonly applied?

These round bars can undergo various treatments such as annealing, quenching and tempering (Q&T). Q&T is common, involving heating to ~860–890 °C, followed by oil quenching and tempering to improve mechanical properties.

3. What are the common applications of 4140 / EN19 / 42CrMo4 round bars?

These bars are used for high-stress components like gears, crankshafts, spindles, shafts, tie rods, and plastic molds across the automotive, oil & gas, and heavy machinery sectors.

4. What sizes and forms are available?

Round bars are available from 5 mm to over 1000 mm diameter in hot-rolled, forged, quenched & tempered, and cold-drawn forms. Custom sizes can be manufactured based on client specifications.

5. How are the bars packaged and delivered?

Bars are securely packed in bundles (2–4 tons each), tagged with heat numbers, and shipped in 20′ or 40′ containers or via bulk vessels. Lead times range from 7–10 days for stock and up to 30 days for new production.

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: