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4140 / EN19 / 42CrMo4 Round Bar — What You Need to Know

4140 / EN19 / 42CrMo4 is a chromium-molybdenum alloy steel available as round bars from 5mm to 500mm diameter. It offers tensile strength of 850–1000 MPa, excellent hardenability, and heat-treatability — making it ideal for gears, shafts, axles, and high-stress structural parts. Super Metal Manufacturing Co. manufactures, stocks, and exports these bars from Mumbai, India, with Mill Test Certificates and ISO 9001:2015 certification.

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4140 / EN19 / 42CrMo4 Round Bars — Manufacturer, Stockist and Exporter

Super Metal Manufacturing Co. is a leading manufacturer, stockist and exporter of high-quality 4140 / EN19 / 42CrMo4 round bars, supplying premium alloy steel products to 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 defense, automotive, aerospace, heavy machinery, oil & gas, and construction, thanks to their exceptional strength, durability, and performance.

4140 / EN19 / 42CrMo4 is a versatile alloy steel known for its toughness, high fatigue strength, and ability to withstand harsh conditions. It contains chromium (Cr) and molybdenum (Mo) as primary alloying elements, offering superior resistance to wear and impact. This makes these round bars ideal for high tensile-strength applications such as gears, shafts, and axles. Additionally, 4140 / EN19 / 42CrMo4 is heat-treatable — suitable for forging, welding, and machining processes. See our chemical & mechanical properties page for full data.


4140 EN19 42CrMo4 Solid Round Bars | Super Metal

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


Bright Round Bars 4140 EN19 42CrMo4 — Turned and Polished Finish

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
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

Application of AISI Alloy Steel 4140 / EN19 / 42crmo4 Round Bars

ASTM alloy 4140 steel bar, flat or plate material can be used for as wide variety of applications where greater toughness and wear resistance is needed over lower carbon grades. Typical applications for 4140 tool steel uses include Components, Adapters, Arbors,strippers, holder blocks, mold bases, ejectors, back up and support tooling, fixtures, jigs, molds, cams, drill collars, Axle Shafts, Bolts, Crankshafts,stubs, couplings, reamer bodies, axles, shafting, piston rods, rams, hydraulic machinery shafts, gears, sprockets, gear racks, chain links, spindles, tool bodies, tool holders, tie rods, Connection Rods, Chuck Bodies, Collets, Conveyor Pins & Rolls, Ejector Pins, Forks, Gears, Guide Rods, Hydraulic Shafts & Parts,Lathe Spindles, Logging Parts, Milling Spindles, Motor Shafts, Nuts, Pinch Bars, Pinions, Pump Shafts,boring bars,tracks, slides, wear strips or parts, forming dies, brake dies, trim dies, bolsters, machinery parts and components, etc.

Need 4140 / EN19 / 42CrMo4 Round Bars? Get a Quote in 2 Hours

We maintain large in-stock inventory. Mill TC provided. ISO & BIS certified. Fast worldwide shipping.

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Questions & Answers — 4140 / EN19 / 42CrMo4 Round Bars

4140 (AISI/SAE), EN19 (BS 970), and 42CrMo4 (DIN/EN 10083) are equivalent grades of chromium-molybdenum alloy steel with nearly identical chemical composition and mechanical properties. The difference is only the standard system — American (AISI), British (BS), or European (DIN). All three provide high tensile strength (850–1000 MPa) and excellent toughness. See our chemical and mechanical properties page for a full comparison.
We stock 4140 / EN19 / 42CrMo4 round bars from 5mm to 500mm diameter in lengths from 1000mm to 6000mm. Custom cut-to-length and non-standard diameters are available on request. View the complete size chart and weight chart for reference.
Yes, always. Every shipment from Super Metal Manufacturing Co. is accompanied by a Mill Test Certificate (MTC) containing chemical composition and mechanical property test reports. We are ISO 9001:2015 and BIS certified. Additional third-party inspection reports (SGS, Bureau Veritas, DNV) can be arranged on request.
4140 / EN19 / 42CrMo4 bars are available in annealed (soft, machinable), normalized, and quenched & tempered (Q&T) conditions. Q&T condition offers the highest tensile strength (850–1000 MPa) and hardness (28–34 HRC). Please specify your required condition when requesting a quote.
We supply to both small fabricators and large industries. No strict minimum order quantity for in-stock sizes — contact us at +91-9167308070 or WhatsApp for a specific quote based on your requirement.
Yes. We export to 40+ countries including UAE, Saudi Arabia, USA, UK, Germany, Singapore, Australia, Qatar, South Africa, and more. All export orders are packed in fumigated wooden crates with full documentation — Certificate of Origin (COO), packing list, invoice, and Mill TC.

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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