EN8 Round Bar
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Solitaire Steel, based in Mumbai, India, is a leading manufacturer and supplier of premium medium carbon steel alloys. These alloys offer improved properties compared to low carbon steels, with moderate tensile strength that can be further enhanced through hardening processes. For instance, the EN8 Round Bar, when hardened, achieves higher tensile strength than mild steel, making it suitable for various applications. One of the key advantages of these alloys is their machinability, even in untreated conditions, making them a versatile choice in the industry.
EN8 Square Bars, typically supplied in an untreated form, can be surface-hardened through induction, significantly boosting their wear resistance—an essential feature for applications prone to abrasion. Similarly, heat treatment of 080M40 Hex Bars results in a uniform metallurgical structure, ensuring consistent machinability. As an unalloyed medium carbon steel, the EN8 Steel Bar’s tensile strength ranges between 500 N/mm² to 800 N/mm², making it a reliable material for demanding industrial applications.
Specification Of EN8 Bar Round
| Grade | EN-8 Carbon Steel Round Bar |
|---|---|
| Square bar size | 4 to 100mm |
| Hollow Bar | 32mm OD x 16mm ID to 250mm OD x 200mm ID) |
| Hex Bar size | 2-100mm A/F |
| Angle bar size | 3mm*20mm*20mm~12mm*100mm*100mm |
| Rectangles Size | 33 x 30mm to 295 x 1066mm |
| Flat bar size | Thickness: 2 -100mm |
| Width: 10 to 500mm | |
| Channel Bar | 80 x 40mm to 150 x 75mm section; 5.0 to 6.0mm thickness |
| Section | 3.0 to 12.0mm thickness |
| size | Diameter: 3-~800mm |
| Billet Size | 1/2″ to 495mm Diameter |
| Standard Dimensions | Diameter / Height: EN-8 Round Bar Rod and Bar Sizes : 0.5 inches / 0.625 inches / 0.75 inches / 0.875 inches / 1.0 inches / 1.125 inches / 1.25 inches / 1.375 inches / 1.5 inches / 1.75 inches / 2.0 inches / 2.25 inches / 2.5 inches / 2.75 inches / 3.0 inches / 3.25 inches / 3.5 inches / 3.75 inches / 4.0 inches / 4.25 inches / 4.5 inches / 5.0 inches / 5.25 inches / 5.5 inches / 6.0 inches / 7.0 inches / 8.0 inches / 9.0 inches. |
| Surface | Bright, Hot Rolled Pickled, Cold Drawn, Sand Blasting Finished, Polished, Hairline |
| Tolerance | H8, H9, H10, H11, H12, H13K9, K10, K11, K12 or as per clients’ requirements |
| Technique | EN-8 Round Bar Hot Rolled, Cold Drawn, Cold Rolled, Forged Round Bar, Rod |
| Condition | Hardened & tempered, annealed |
| Finish | Cold (bright) drawn, centreless ground, hot rolled, smooth turned, peeled, slit rolled edge, hot rolled annealed, Rough Turned, Bright, Polish, Grinding, Centreless Ground & Black |
| Form | EN-8 Round Bar Round, Rod, T-Bar, EN-8 steel Channel Bar, Precision Ground Bar, EN-8 Carbon Steel Flat Bar, Carbon Steel EN-8 Square Bar, CS EN-8 Blocks, EN-8 Round Rod, EN-8 CS Rings, EN 8 Steel Hollow, EN 8 Steel Grade Triangle, Rectangle, Hex (A/F), CS EN-8 Threaded, Half Round Bar, Profiles, Steel Grade EN 8 Billet, EN-8 steel Ingot, I/H Bar, Forging etc. |
| Processing | Bar cutting to 650mm |
Chemical Composition of EN8 Round Bar
| Silicon | 0.10-0.40% |
| Carbon | 0.36-0.44% |
| Manganese | 0.60-1.00% |
| Sulphur | 0.050 Max |
| Phosphorus | 0.050 Max |
| Chromium | – |
| Molybdenum | – |
| Nickel | – |
EN8 Bar Mechanical Properties
| 080M40 (EN8) – mechanical properties in “R” condition | ||
|---|---|---|
| Max Stress | 700-850 n/mm2 | |
| 0.2% Proof Stress | 450 n/mm2 Min | (up to 19mm LRS) |
| Yield Stress | 465 n/mm2 Min | (up to 19mm LRS) |
| Elongation | 16% Min | (12% if cold drawn) |
| Impact KCV | 28 Joules Min | (up to 19mm LRS |
| Hardness | 201-255 Brinell | |
EN8d Equivalent Grade
| BRITISH BS 970:1991 | 080M40, 080A42 |
| BRITISH BS 970:1955 | EN8, EN8D |
| AISI / ASTM A29 | 1038, 1040, 1045 |
| DIN Werkstoff No. | 1.0511, 1.1186, 1.1189 |
| BS & DIN European | C40, CK40, C45, CK45 |
| JIS G4051 | S40C, S45C |
| AISI / SAE | 1040, 1042 |
| EN | EN8 |
| BS | 080A40 |
Carbon Steel EN8 Bar Sizes
| Size (inches) |
1/4 | 5/16 | 3/8 | 7/16 | 1/2 | 1 | 5/8 | 11/16 | 3/4 | 1 | 7/8 | 1 | 1 | 1 1/8 |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1 1/4 | 1 3/8 | 1 7/16 | 1 1/2 | 1 5/8 | 1 3/4 | 1 7/8 | 2 | 2 1/8 | 2 1/4 | 2 3/8 | 2 1/2 | 2 5/8 | 2 3/4 | |
| 3 | 3 1/4 | 3 1/2 | 3 3/4 | 4 | 4 1/4 | 4 1/2 | 4 3/4 | 5 | 5 1/4 | 5 1/2 | 6 | 6 1/2 | 7 | |
| 7 1/2 | 8 | 9 | ||||||||||||
| Size (mm) |
5 | 6 | 7 | 8 | 9 | 10 | 12 | 13 | 14 | 15 | 16 | 18 | 20 | 22 |
| 24 | 25 | 28 | 30 | 32 | 35 | 36 | 38 | 40 | 42 | 45 | 50 | 55 | 60 | |
| 65 | 70 | 75 | 80 | 85 | 90 | 95 | 100 | 110 | 120 | 125 | 130 | 140 | 150 |
Heat Treatment of EN8 Bright Bar
| Heat Treatment | Tensile Strength Rm | Yield Strength Rm | Rp 0.2 | A min on | Impact | Hardness | |
| 5.65√So | Izod Ft.lb | KCV J | |||||
| MPa | MPa | MPa | HB | ||||
| N | 550 | 280 | – | 16 | 15 | 16 | 152/207 |
| 510 | 245 | – | 17 | – | – | 146/197 | |
| Q | 625/775 | 385 | 355 | 16 | 25 | 28 | 179/229 |
| R | 700/850 | 465 | 450 | 16 | 25 | 28 | 201/255 |
Cs EN8 Round Bar Standard 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 |
Application Of EN8 Round Rod
- Automotive parts
- Shafts
- Gears
- Spindles
- Stressed Pins
- Keys
- Connecting rods
- Studs, bolts
- Axles, spindles
- General engineering components
Supply and Exporter
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FAQs
EN8 Carbon Steel Round Bars are widely used in metallurgical, mechanical, and electrical construction fields, as well as in ships, military applications, and automobile rear-end products. They are available at economical rates and are valued for their versatility and strength.
EN8 steel grade, also known as 080M40, is a medium carbon steel with good tensile strength and moderate hardness. It is unalloyed and commonly used for applications requiring medium strength, such as shafts, stressed pins, studs, and keys.
High Tensile Strength: Offers tensile strength of 500 to 800 MPa, ideal for components under heavy loads. Good Machinability: Relatively easy to machine, making it suitable for precision engineering tasks despite its strength.
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