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Alloy Steel 070M20 Round Bar 070M20 Bars 070M20 Rods
135.0 INR/Kilograms
Product Details:
- Processing Peeled, Turned, Polished
- Length Custom Cut Lengths, Standard Lengths Up To 6 Meters
- Diameter 10 mm to 300 mm
- Specific Use Manufacturing Machine Components, Fasteners
- Material Alloy Steel 070M20
- Technique Hot Rolled, Cold Drawn
- Application Automobile, Construction, Engineering, Mechanical Parts, Shafts, Gears
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Alloy Steel 070M20 Round Bar 070M20 Bars 070M20 Rods Price And Quantity
- 1 Kilograms
- 135.0 INR/Kilograms
Alloy Steel 070M20 Round Bar 070M20 Bars 070M20 Rods Product Specifications
- +/- 0.5 mm
- BS 970
- 070M20
- Round Bar, Rod, Bar
- Bright, Black
- Automobile, Construction, Engineering, Mechanical Parts, Shafts, Gears
- Hot Rolled, Cold Drawn
- 10 mm to 300 mm
- Custom Cut Lengths, Standard Lengths Up To 6 Meters
- Peeled, Turned, Polished
- Alloy Steel 070M20
- Manufacturing Machine Components, Fasteners
- Smooth, Cleaned
- 430 - 540 MPa
- Magnetic
- Normalizing, Annealing
- 20% Minimum
- 280 MPa
- 143 - 207 HB
- As Rolled, Peeled, Turned, Polished
- 7.85 g/cm3
Product Description
070M20 (formerly commonly known as EN3A) is a high-quality, unalloyed medium-carbon steel specification within the British Standard BS 970 system.
Unlike the previous alloy steels you looked at, 070M20 is technically classified as a carbon steel because it does not rely on deliberate additions of alloying elements like chromium, nickel, or molybdenum. Instead, it is an economical, general-purpose engineering steel widely specified for components that require decent structural strength, good machinability, and reliable weldability without the cost premium of full alloys.
Global Cross-Reference & Equivalents
When sourcing or replacing BS 970 070M20 round bars and rods in international markets, you can map them directly to these global equivalent grades:
| Standard System | Designators / Equivalents |
| BS 970 (UK) | 070M20 / EN3A |
| AISI/SAE (USA) | 1020 / UNS G10200 |
| W.Nr. / EN (Germany/Europe) | 1.0402 / C22 or C22E |
| ISO | C20 |
| JIS (Japan) | S20C / S22C |
Chemical Composition (Typical wt.%)
The chemistry of 070M20 is strictly controlled to maintain excellent formability and ensure it doesn't harden excessively during welding.
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Carbon (C): 0.16% 0.24%
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Manganese (Mn): 0.50% 0.90%
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Silicon (Si): 0.10% 0.40%
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Phosphorus (P): $le$ 0.050%
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Sulfur (S): $le$ 0.050%
Supply Forms & Mechanical Properties
070M20 round bars are highly versatile and typically supplied in two primary finishes, which fundamentally dictate their mechanical behavior:
1. Delivery Conditions
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As-Rolled / Forged (+AR): Hot-worked bars suitable for subsequent forging, bending, or extensive heavy machining.
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Cold Drawn / Bright Turned (+C): Cold-finished bars that offer tight dimensional tolerances, a smooth scale-free surface, and elevated yield strength due to strain hardening.
2. Standard Mechanical Properties
The values below represent typical limits for standard structural thickness sections (e.g., up to 63mm diameter):
| Property | As-Rolled (+AR) | Cold Drawn (+C) |
| Tensile Strength | 410 - 430 MPa | 500 -550 MPa |
| Yield Strength | 215 -230 MPa | 380 -410 MPa |
| Elongation A5) | 21% | 10% 14% |
| Brinell Hardness (HBW) | 120 - 160 | 150 -200 |
Primary Applications & Processing
Because of its balanced profile, 070M20 is the go-to structural steel for low-stress machinery components, brackets, and frameworks:
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Welded Assemblies: Excellent for structural fabrications, crane components, and frames because it does not require complex pre-heat or post-weld thermal cycles.
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Fasteners & Spindles: Standard choice for low-stress shafts, tie rods, spacer rings, keys, dowels, studs, and low-load threaded fasteners.
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Case Hardening Option: While it isn't an alloy steel like 16MnCr5, 070M20 can be carburized or cyanided if your application requires a thin, wear-resistant skin over a very ductile core.
Key Features and Specifications
Alloy Steel 070M20 Round Bars are crafted for demanding environments, offering mechanical properties such as a minimum 20% elongation, 280 MPa yield strength, and a density of 7.85 g/cm3. The material supports multiple delivery conditions including as-rolled, peeled, turned, and polished, and adheres to BS 970 standards for guaranteed quality. It is commonly supplied in diameters from 10 mm to 300 mm with both custom and standard length options.
Heat Treatment and Surface Finish Options
Manufactured with processes like normalizing and annealing, these bars enhance ductility and toughness. The various surface finish options-bright, black, peeled, turned, and polished-are tailored to suit particular end-uses, whether for aesthetic appeal or technical specifications. This flexibility ensures compatibility with diverse manufacturing requirements.
Applications Across Industries
070M20 alloy steel bars are widely utilized in automotive parts, construction frameworks, mechanical shafts, and precision gears. Their combination of strength, versatility, and magnetic properties positions them as a dependable choice for fabricators, exporters, traders, and end-users across engineering and manufacturing sectors in India and beyond.
FAQ's of Alloy Steel 070M20 Round Bar 070M20 Bars 070M20 Rods:
Q: How are Alloy Steel 070M20 Round Bars typically used in the manufacturing industry?
A: These bars are commonly used for producing machine components, fasteners, shafts, and gears, thanks to their robustness, dimensional accuracy, and reliable mechanical properties. Their machinability and magnetic nature also make them suitable for diverse engineering and automotive applications.Q: What are the available surface finishes and how do they impact performance?
A: Alloy Steel 070M20 Bars are offered in finishes such as bright, black, peeled, turned, and polished. These finishes enhance surface smoothness, improve wear resistance, and are selected based on application requirements-such as aesthetic needs or reduced friction.Q: When should you consider using 070M20 rods with heat treatment like normalizing or annealing?
A: Heat treatment such as normalizing or annealing is recommended when the application demands improved mechanical properties, enhanced ductility, or stress relief after machining. It is particularly beneficial for components subjected to dynamic loads or critical tolerances.Q: Where can Alloy Steel 070M20 Round Bars be sourced in India?
A: They can be procured from leading dealers, exporters, fabricators, manufacturers, producers, retailers, suppliers, and traders across major industrial hubs in India. Reputable suppliers typically offer customization and prompt delivery services.Q: What is the process for obtaining custom cut lengths of 070M20 bars?
A: Customers can request custom cut lengths as per their project needs, up to standard lengths of 6 meters. Suppliers will process the material according to specified dimensions, adhering to the required tolerance and surface finish.Q: How does the magnetic property of 070M20 alloy steel benefit its applications?
A: The intrinsic magnetic characteristics support applications where magnetic responsiveness is essential, such as in certain automotive and engineering environments requiring magnetic field interaction or detection.Tell us about your requirement
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