EN19 ROUND BAR
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Tronixalloy.com is a highly regarded exporter and supplier of EN19 Round Bar sourced from the finest raw materials. As an industry standard product, these EN19 Round Bars ensure the highest quality. The EN19 bars can be annealed, rolled, or even treated in the T condition.
The EN19 Round Bar is renowned for its wear resistance and potency characteristics. EN19 Carbon Steel Rods are suitable for shafts, spindles, gears, etc. The CS EN19 Bars provide excellent ductility and shock resistance combined with resistance to wear. The characteristics of CS EN19 Bar make them quite popular in high tensile engineering steels.
An EN 19 round bar has tensile strength and is made from a high quality alloy steel. A combination of good ductility and shock resistance makes EN19 Round Bar suitable for applications with very high loads, such as engine gearboxes. In the automotive industry, EN19 Round Bar is popular. In recent years, EN19 Round Bar has become an established material in the Oil & Gas sector. EN19 material performs well in any application that demands strength.
We offer steel flat bars, steel round bars, hexagonal steel bars, and steel square blocks in EN19. The EN19 Round bar can be supplied to your required lengths. The density of EN19 Alloy steel material is 7.85kg/cm3, the tensile strength of EN19 Engineering steel is 775-1075 N/mm2, and the yield strength is 555-755 N/mm2.
In addition to being known as 708M40 or 709M40 and AISI 4140, the en19 hex bar can be annealed as rolled or supplied in the T condition.To forge the EN19 Round Bar, first heat the alloy to 850°C – 1200°C, and then anneal it by gradually heating it between 680°C – 700°C, followed by cooling in air. For welding rods for EN19, heat treatment temperatures, heating rates, cooling rates, and soaking times will vary.
There are several factors that contribute to the variation in heat treatment. For instance, the shape and size of en19 square bars or en19 hollow bars would differ. The kind of furnace used and the quenching medium and transfer facilities for the workpiece are also important factors during the heat treatment of the en19 flat bar.
A high quality engineering steel alloy, EN19 Round Bar meets all the requirements for engineering steel. The main characteristics of the en19 rod include its high tensile steel in addition to good ductility and shock resistance. Furthermore, the EN19 Round Bar offers good wear resistance. This engineering grade steel is an alloy that can be case hardened. These characteristics noted by engineers in the automobile as well as the oil and gas industry is why en19 steel suppliers in Chennai often keep stock of these components.
Because of their high tensile strengths and low costs, steels are widely used in construction and other applications. Hardening agents such as carbon, other elements, and inclusions within iron prevent dislocations from occurring in iron’s crystal lattices. A typical steel alloy may contain as much as 2.1% carbon by weight.
Increasing or decreasing the amount of alloying elements in the steel, either as solutes or precipitates, retards the movement of dislocations that cause iron to be so ductile and weak, and thus controls steel properties such as hardness, ductility, and tensile strength. Compared to pure iron, steel’s strength can only be achieved at the expense of ductility, which iron has in excess.
Steel had been produced in bloomery furnaces for thousands of years, but its use expanded after the invention of blister steel and then crucible steel in the 17th century. A new era of mass-produced steel began with the invention of the Bessemer process in the mid-19th century. Afterwards, the Siemens-Martin and Gilchrist-Thomas processes refined steel’s quality.
In addition to replacing wrought iron with mild steel, further refinements in the process, such as basic oxygen steelmaking (BOS), further reduced production costs and enhanced metal quality. Steel is one of the most common materials in the world today, with over 1.3 billion tons produced every year. Buildings, infrastructure, tools, ships, automobiles, machines, appliances, and weapons all use it. Various standards organisations define various grades of modern steel.
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EN19 Round Bar Specification
|
Grade |
en19 |
|
Specification |
BS 970 1955 EN |
|
Round bar size |
Diameter: 3-~800mm |
|
Hex Bar size |
2-100mm A/F |
|
Flat bar size |
Thickness: 2 -100mm |
|
Width: 10 to 500mm |
|
|
Square bar size |
4 to 100mm |
|
Angle bar size |
3mm*20mm*20mm~12mm*100mm*100mm |
|
Section |
3.0 to 12.0mm thickness |
|
Channel Bar |
80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness |
|
Hollow Bar |
32mm OD x 16mm ID to 250mm OD x 200mm ID) |
|
Billet Size |
1/2″ to 495mm Diameter |
|
Rectangles Size |
33 x 30mm to 295 x 1066mm |
|
Finish |
Cold (bright) drawn, centreless ground,smooth turned, peeled, slit rolled edge, hot rolled, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
|
Tolerance |
H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
|
Surface |
Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
|
Condition |
Hardened & tempered, annealed |
|
Technique |
en19 Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod |
|
Processing |
Bar cutting to 650mm |
|
Form |
en19 Welding Rod, Round, Rod, T-Bar, Channel Bar, Precision Ground Bar, Flat Bar, Square, Blocks, Round Rod, Rings, Hollow, Triangle, Rectangle, Hex (A/F), Threaded, Half Round Bar, Profiles, Billet, Ingot, I/H Bar, Forging etc. |
|
Our en19 round bar conforms to NACE MR0175/ISO 15156 |
|
EN19 Round Bar Chemical composition:
| Element | C | Si | Mn | P | S | Cr | Mo | Fe |
| Content (%) | 0.35-0.45 | 0.15-0.30 | 0.50 – 0.80 | 0.035 | 0.040 | 0.90-1.50 | 0.20-0.40 | 96.78-97.77 |
EN19 Round Bar Mechanical Properties:
| Properties | Metric | Imperial |
| Tensile strength | 655 MPa | 95000 psi |
| Yield strength | 415 MPa | 60200 psi |
| Bulk modulus (typical for steel) | 140 GPa | 20300 ksi |
| Shear modulus (typical for steel) | 80 GPa | 11600 ksi |
| Elastic modulus | 190-210 GPa | 27557-30458 ksi |
| Poisson’s ratio | 0.27-0.30 | 0.27-0.30 |
| Elongation at break (in 50 mm) | 25.70% | 25.70% |
| Hardness, Brinell | 197 | 197 |
| Hardness, Knoop (converted from Brinell hardness) | 219 | 219 |
| Hardness, Rockwell B (converted from Brinell hardness) | 92 | 92 |
| Hardness, Rockwell C (converted from Brinell hardness. Value below normal HRC range, for comparison purposes only) | 13 | 13 |
| Hardness, Vickers (converted from Brinell hardness) | 207 | 207 |
| Machinability (based on AISI 1212 as 100 machinability) | 65 | 65 |
EN19 Round Bar Equivalent Grades:
| Internal Standard | BS | Din | IS | EN | Sae/Aisi |
| EN19 | 709M40 | 42CrMo2 | 40Cr4Mo3 | En19 | 4140 |
EN19 Round Bar Types
| EN-19 / 709M40 Polished Round Bar | EN-19 / 709M40 T-Bar | EN-19 / 709M40 Square Bar |
| EN-19 / 709M40 Triangle Bar | EN-19 / 709M40 Flat Bar | EN-19 / 709M40 Hex Bar |
| EN-19 / 709M40 Precision Ground Bar | EN-19 / 709M40 Hollow Bar | EN-19 / 709M40 Round Bar |
| EN-19 / 709M40 Threaded Bar | EN-19 / 709M40 Rods | EN-19 / 709M40 Half Round Bar |
EN19 Round Bar Sizes Charts
| En19 Rounds Hot Rolled | |||||||||||||
| Size (mm) | 40 | 50 | 60 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 105 | 110 | |
| 115 | 120 | 125 | 130 | 140 | 150 | 160 | 170 | 180 | 190 | 200 | 220 | ||
| 240 | 260 | 280 | 300 | 320 | 350 | 400 | – | – | – | – | – | ||
| EN19 Rounds Bright Drawn | ||||||||||||||
| Size (inches) | 5/16 | 3/8 | 7/16 | 1/2 | 9/16 | 5/8 | 3/4 | 7/8 | 15/16 | 1 | 1 1/8 | 1 1/4 | 1 3/8 | 1 1/2 |
| 1 5/8 | 1 3/4 | 2 | 2 1/4 | 2 1/2 | 2 3/4 | 3 | 3 1/2 | 4 | – | – | – | – | – | |
| Size (mm) | 10 | 12 | 15 | 16 | 18 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 60 | – |
| EN19 Hexagons Bright Drawn | |||||||||||||
| Size (ins A/F) | 0.500 | 0.600 | 0.625 | 0.750 | 0.937 | 1.010 | 1.125 | 1.300 | 1.500 | – | – | – | – |
| Size (mm A/F) | 10 | 12 | 15 | 16 | 18 | 20 | 25 | 30 | 35 | 40 | 45 | 50 | 60 |
EN19 Round Bar Surface Finish
| CD | Cold drawn | P | Polished |
| BD | Bright drawn | SRE | Slit rolled edge |
| CG | Centreless ground | HF | Hot finished |
| CF | Cold finished | HRAP | Hot rolled annealed and pickled |
| P&T | Peeled and turned | RT | Rough turned/peeled |
| ST | Smooth turned | PR | Peeled and reeled |
EN19 Round Bar Physical Properties:
| DENSITY (G/CM 3) | 8.08 |
| DENSITY (LB/IN 3) | 0.292 |
| MELTING POINT (°C) | 1425 |
| MELTING POINT (°F) | 2600 |
EN19 Round Bar Thermal Properties:
| Average Coefficient of Linear Thermal Expansion (μm/m.K) | ||||
| Temp. Range °C | 20-100 | 20-200 | 20-400 | 20-600 |
| Coefficient | 12.2 | 12.6 | 13.7 | 14.6 |
| Electrical Resistivity ( μΩ.m) and Thermal Conductivity (W/m.K) | ||||
| Temp. Range °C | 100 | 200 | 400 | 600 |
| Electrical Resistivity | 0.263 | 0.326 | 0.4575 | 0.646 |
| Thermal Conductivity | 42.6 | 42.2 | 37.7 | 33.0 |
EN19 Round Bar Condition
| H&T | Hardened and tempered. |
| ANN | Annealed |
| PH | Precipitation hardened. |
EN19 Round Bar Hardness:
| Properties | Metric | Imperial |
| Hardness, Brinell | 197 | 197 |
EN19 Round Bar Sizes
| Type | SIZES (mm) | SIZES (Inches) | ISO Tolerance |
| Cold Drawn and Ground | 10.00 – 75.00 | 5/6″ – 2.50″ | h8-h9-h10-h11 |
| Peeled and Polished | 40.00 – 150.00 | 1.50″ – 6.00″ | h11, h11-DIN 1013 |
| Peeled and Ground | 20.00 – 50.00 | 3/4″ – 2.00″ | h9-h10-h11 |
| Cold Drawn and Polish | 3.00 – 75.00 | 1/8″ – 3.00″ | h8-h9-h10-h11 |
EN19 Bars Standard lengths of 2000 mm up to 6000 mm. Cut to size on request (tolerance +2/-0 mm).
| 5.0 | 45.0 |
| 6.0 | 50.0 |
| 7.0 | 55.0 |
| 8.0 | 60.0 |
| 9.0 | 65.0 |
| 10.0 | 70.0 |
| 12.0 | 75.0 |
| 16.0 | 80.0 |
| 20.0 | 90.0 |
| 25.0 | 100.0 |
| 30.0 | 130.0 |
| 35.0 | 160.0 |
| 40.0 | 200.0 |
- SW 13 EN19 Round Bar
- SW 17 EN19 Round Bar
- SW 19 EN19 Round Bar
- SW 24 EN19 Round Bar
- SW 27 EN19 Round Bar
EN19 round bars Characteristics:
- When hardened and tempered, this material distorts when machining shafts or long spindles
- Work pieces should be rough machined to plus tolerance and left on the floor for 36 hours after which the material would have “aged” and relaxed, thereby minimising distortion in the finished product.
- Machinability is good, but surface defects should be removed by 6% on the outside diameter
- It is possible to weld this material, but welding should only be attempted with the appropriate methods and materials, according to welding expertise.
- Up to 100mm in diameter, ideal for 60 ton tensile applications
- Sizes above the limited ruling section will only be heat treated to hardness, with no guarantee of mechanical properties.
Forging Properties:
Forge within the temperature range of 125°C/90°C Celsius.
Stress Relieving:
Annealed: 600-650°c Heat is needed.
Hardened: 500-550°c Heat is needed.
Normalising:
Heat 870°C – 900°C and cool in still air.
Annealing:
Anneal at a temperature of 85°C Celsius and cool steadily.
Density:
Density of EN19 Alloy steel material: 7.85kg/cm3
Machinability:
EN19 alloy steel has good machinability in the annealed condition.
Welding:
All conventional welding techniques can be used to weld EN19 steel. The mechanical properties of this steel will be affected if it is welded in heat treated condition, so post-weld heat treatment is recommended.
EN19 Round Bars Applications
- Pumps/Electric Motor Industry
- Automobile Industry
- Defence Sector
- Railways
- Health & Sports
- Agriculture
- Oil & Gas
- Textile Industry
- Food Processing Industry
- Houses & Fittings
- Mining
- Miscellaneous
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