4140 Steel Bars

4140 Steel Bars from Super Metal Manufacturing Co. are high-performance chromium-molybdenum alloy steel bars crafted for demanding industrial applications. Celebrated for their high strength, toughness, and wear resistance, these bars stand out as dependable engineering materials.

4140 steel contains approximately 0.38–0.43% carbon, 0.75–1.00% manganese, 0.80–1.10% chromium, 0.15–0.25% molybdenum, and 0.15–0.35% silicon, with phosphorus and sulfur held to very low levels sakysteel.comKing Steel Corp.DeZe Technology Co, LtdThis unique alloy blend underpins its mechanical performance and heat treatment responsiveness.


In the quenched and tempered state, 4140 Steel Bars can exhibit tensile strength exceeding 1000 MPa, yield strength up to 655 MPa, and notable impact toughness and wear resistance sakysteel.com JIYUANDeZe Technology Co, Ltd This combination makes them ideal for parts that must endure cyclic loading and harsh conditions.

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 steel features a density around 7.85 g/cm³, a modulus of elasticity of ~205 GPa, and thermal and electrical properties suitable for high-performance uses SteelProDeZe Technology Co, Ltd These traits ensure dimensional stability and mechanical reliability across diverse operating environments.



These bars are highly adaptable to heat treatment—annealing improves machinability and ductility, while quenching and tempering elevate strength and hardness sakysteel.comeast-ai.comDeZe Technology Co, LtdIn annealed form, machinability is relatively good, though post-treatment hardness demands robust tooling techniques


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 about 4140 Steel Bars

1. What is 4140 Steel?

4140 Steel is a chromium-molybdenum alloy steel known for its high strength, toughness, and excellent fatigue resistance. It is widely used in industrial and engineering applications due to its superior mechanical properties.

2. What are the main applications of 4140 Steel Bars?

4140 Steel Bars are used in the automotive, oil and gas, aerospace, and construction industries. Common applications include crankshafts, gears, shafts, drill collars, and heavy-duty machinery components.

3. Can 4140 Steel Bars be welded?

Yes, 4140 Steel can be welded, but it requires preheating and post-weld heat treatment to avoid cracking due to its high hardenability and carbon content.

4. What are the heat treatment options for 4140 Steel?

4140 Steel Bars can be annealed, normalized, or quenched and tempered to achieve desired mechanical properties. Quenching and tempering enhance its strength, toughness, and wear resistance.

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.

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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