AISI 4140 Round Bars are made from a chromium-molybdenum alloy and feature excellent strength, wear resistance, and toughness. These round bars have excellent formability and machinability, along with good weldability, making them ideal for use in industrial applications in temperatures up to 800°F. Moreover, they can be hardened and tempered to achieve greater strength and durability. AISI 4140 Round Bars is an alloy steel containing chromium-molybdenum (Cr-Mo) as its main alloying element. It also contains traces of manganese, sulfur, phosphorus, silicon, nickel, and carbon. This type of steel has good strength and hardenability characteristics that make it ideal for use in industrial applications such as shafts and machinery components.
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The 42CrMoA Round Bars is a grade equivalent to the AISI 4140 round bar. It is composed primarily of chromium (Cr) and molybdenum (Mo). This material offers excellent strength properties along with good machinability characteristics. The EN19 grade is an alloy steel containing chromium-molybdenum-vanadium as its main alloying elements. It also contains small amounts of manganese, sulfur, phosphorus, silicon, nickel, copper and aluminum. This material provides excellent strength properties along with good wear resistance characteristics making it suitable for use in various industrial applications such as automotive parts or machine components. Alloy Steel EN24 Round Bars, Alloy Steel A182 F5 Round Bars and many more grades are also available.
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Alloy Steel EN19 Round Bars
The benefits of using 42CrMoA Round Bars grades include their high strength properties which make them suitable for use in demanding industrial applications; their good machinability characteristics; their wear resistance properties; their ability to be heat treated; their corrosion resistance properties; compared to other steels; their availability in numerous sizes; and their wide range of grades that can be used for different purposes depending on the application requirements. The EN19 grade provides improved toughness over the AISI 4140 while still offering good wear resistance along with high strength properties while the SAE Grade offers improved hardness over the AISI 4140 while still providing excellent machinability characteristics. Different types of products are available, such as SMO 254 UNS S31254 Forged Fittings, Socket Weld Raised Face Flanges, etc.
AISI 4140 and 42CrMoA are two popular alloys used in many industrial applications due to their excellent physical properties such as high strength combined with good machinability characteristics. The EN19 grade offers improved toughness compared to the AISI 4140 while still offering good wear resistance along with high strength properties while the SAE Grade offers improved hardness over the AISI 4140 while still providing excellent machinability characteristics making them ideal for many different types of industrial applications depending on the needs.
What is SAE 4140 Round Bars?
SAE 4140 round bars are high-strength steel bars made from a chromium-molybdenum alloy. They have high fatigue strength, impact resistance & toughness, making them ideal for heavy-duty applications. SAE 4140 round bars are commonly used in manufacturing gears, shafts, and axles, as well as in the oil and gas, automotive, and construction industries.
What are the uses of SAE 4140 Round Bars?
SAE 4140 round bars are used in various heavy-duty applications that require high strength, toughness, and durability. They are commonly used in manufacturing gears, shafts, and axles, as well as in the construction, automotive, and oil and gas industries. SAE 4140 round bars are also used to manufacture tools, dies & molds.
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Alloy Steel EN19 Bars Specification
Standard ASTM, ASME and API
Range 4 mm to 350 mm dia
Length 1000 mm Long To 6000 mm Long
Finish Bright, Polish & Black
Condition Cold Drawn & Polished Cold Drawn, Centreless Ground & Polished
Form Round, Square, Hex (A/F), Rectangle, Wire (Coil Form), Wire-mesh, Billet, Ingot, Forging Etc.
Grade Alloy Steel AISI 4140, 42CrMoA, EN19, SAE 4140 Round Bars Werkstoff (1.7225) )
Get QuoteEN19 Cr-Mo Alloy Steel Round Bar Equivalent Indian Standard
| BS 970 1991 | BS 970 1955 EN | AISI/SAE | Werkstoff |
| 708M40 | EN19 | 4140 | 1.7225 |
Werkstoff 1.7225 Alloy Steel Cold Drawn Round Bar Chemical Composition
| Typical Chemical composition of EN19 | |||||||
| C | SI | MN | S | P | Cr | Mn | Mo |
| 0.35～0.45 | 0.10～0.35 | 0.45/0.70 | ≤0.050 | ≤0.035 | 0.90～1.50 | 0.50～0.80 | 0.20～0.40 |
Size Chart of 4140 alloy steel round bar
| Types | SIZES (Millimeter) | SIZES (In) | Tolerance (ISO) |
| Cold Drawn and Ground | 10.00 – 75.00 | 5/6" – 2.50" | h8-h9-h10-h11 |
| Peeled and Ground | 20.00 – 50.00 | 3/4″ – 2.00" | h9-h10-h11 |
| Peeled and Polished | 40.00 – 150.00 | 1.50" – 6.00" | h11, h11-DIN 1013 |
| Cold Drawn and Polish | 3.00 – 75.00 | 1/8" – 3.00" | h8-h9-h10-h11 |
Size Chart of 4140 alloy steel round bar
| Melting Point (°C) | 1425 |
| Density (G/CM 3) | 8.08 |
| Melting Point (°F) | 2600 |
| Density (LB/IN 3) | 0.292 |
4140 HT Round Bar Weight Chart
| Size (inch.) | 4140 Heat Treated Round Bar Wght / Foot in lbs |
|---|---|
| 1/4" | 00.167 |
| 5/16" | 00.261 |
| 3/8" | 00.376 |
| 7/16" | 00.511 |
| 1/2" | 00.668 |
| 9/16" | 00.845 |
| 5/8" | 1.043 |
| 11/16" | 1.262 |
| 3/4" | 1.502 |
| 13/16" | 1.763 |
| 7/8" | 2.045 |
| 15/16" | 2.347 |
| 1" | 2.670 |
| 1 1/16" | 3.015 |
| 1 1/8" | 3.380 |
| 1 3/16" | 3.766 |
| 1 1/4" | 4.172 |
| 1 5/16" | 4.600 |
| 1 3/8" | 5.049 |
| 1 7/16" | 5.518 |
| 1 1/2" | 6.008 |
| 1 9/16" | 6.519 |
| 1 5/8" | 7.051 |
| 1 3/4" | 8.178 |
| 1 7/8" | 9.388 |
| 1 15/16" | 10.020 |
| 2" | 10.680 |
| 2 1/8" | 12.060 |
| 2 1/4" | 13.520 |
| 2 3/8" | 15.060 |
| 2 7/16" | 15.870 |
| 2 1/2" | 16.690 |
| 2 5/8" | 18.400 |
| 2 3/4" | 21.130 |
| 2 7/8" | 22.070 |
| 3" | 25.050 |
| 3 1/4" | 29.300 |
| 3 1/2" | 33.890 |
| 3 3/4" | 38.810 |
| 4" | 44.070 |
| 4 1/4" | 48.230 |
| 4 3/8" | 51.110 |
| 4 1/2" | 55.590 |
AISI 4140 Steel Bar Supply Form & Size & Tolerance
| Supply Form | Size(mm) | Process | Tolerance | |
| Round | Φ6-Φ100 | Cold Drawn | Bright/Black | Best H11 |
| Φ16-Φ350 | Hot Rolled | Black | -0/+1mm | |
| Peeled/ground | Best H11 | |||
| Φ90-Φ1000 | Hot Forged | Black | -0/+5mm | |
| Rough Turned | -0/+3mm | |||
| Flat/Square/Block | Thickness :120-800 | Hot Forged | Black | -0/+8mm |
| Width:120-1500 | Rough Machined | -0/+3mm | ||
Alloy Steel 4140 Hex Bar Physical Properties
| Melting Point (°C) | 1425 |
| Density (G/CM 3) | 8.08 |
| Melting Point (°F) | 2600 |
| Density (LB/IN 3) | 0.292 |
4140 HT Round Bar Weight Chart
| Size (inch.) | 4140 Heat Treated Round Bar Wght / Foot in lbs |
|---|---|
| 1/4" | 00.167 |
| 5/16" | 00.261 |
| 3/8" | 00.376 |
| 7/16" | 00.511 |
| 1/2" | 00.668 |
| 9/16" | 00.845 |
| 5/8" | 1.043 |
| 11/16" | 1.262 |
| 3/4" | 1.502 |
| 13/16" | 1.763 |
| 7/8" | 2.045 |
| 15/16" | 2.347 |
| 1" | 2.670 |
| 1 1/16" | 3.015 |
| 1 1/8" | 3.380 |
| 1 3/16" | 3.766 |
| 1 1/4" | 4.172 |
| 1 5/16" | 4.600 |
| 1 3/8" | 5.049 |
| 1 7/16" | 5.518 |
| 1 1/2" | 6.008 |
| 1 9/16" | 6.519 |
| 1 5/8" | 7.051 |
| 1 3/4" | 8.178 |
| 1 7/8" | 9.388 |
| 1 15/16" | 10.020 |
| 2" | 10.680 |
| 2 1/8" | 12.060 |
| 2 1/4" | 13.520 |
| 2 3/8" | 15.060 |
| 2 7/16" | 15.870 |
| 2 1/2" | 16.690 |
| 2 5/8" | 18.400 |
| 2 3/4" | 21.130 |
| 2 7/8" | 22.070 |
| 3" | 25.050 |
| 3 1/4" | 29.300 |
| 3 1/2" | 33.890 |
| 3 3/4" | 38.810 |
| 4" | 44.070 |
| 4 1/4" | 48.230 |
| 4 3/8" | 51.110 |
| 4 1/2" | 55.590 |
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