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En28 Alloy Steel Round Bar / EN28 Rods/ EN-28 Bars / EN28 Rings
1000.0 INR/Kilograms
Product Details:
- Diameter 10 mm to 400 mm
- Tolerance H8, H9, H10, K12 or as specified
- Application Automobile, Engineering, Construction, Industrial Machinery, Structural Components
- Type Round Bar, Rods, Bars, Rings
- Standard AISI, ASTM, BS, DIN, EN, JIS
- Finish Bright, Black, Peeled, Polished
- Processing Annealed, Hardened & Tempered
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En28 Alloy Steel Round Bar / EN28 Rods/ EN-28 Bars / EN28 Rings Price And Quantity
- 1000.0 INR/Kilograms
- 100 Kilograms
En28 Alloy Steel Round Bar / EN28 Rods/ EN-28 Bars / EN28 Rings Product Specifications
- Automobile, Engineering, Construction, Industrial Machinery, Structural Components
- H8, H9, H10, K12 or as specified
- 10 mm to 400 mm
- EN28 Alloy Steel
- Annealed, Hardened & Tempered
- Hot Rolled, Cold Drawn, Forged
- AISI, ASTM, BS, DIN, EN, JIS
- Bright, Black, Peeled, Polished
- Round Bar, Rods, Bars, Rings
- EN28
- 100 mm to 6000 mm (custom cut length available)
- Gears, Shafts, Connecting Rods, Spindles, Axles
- Machined, Ground, Smooth
- Magnetic
- 50J min (Charpy V-Notch)
- Good
- 860-1100 MPa
- Min. 690 MPa
- Available in Heat Treated condition
- Moderate, can be enhanced with coatings
- Round, Ring, Custom Shapes
- 7.85 g/cm3
- 35-40 HRC (as per heat treatment)
- 16% min
Product Description
EN28 (also known by its British Standard designation BS 970: 1955 826M31) is a high-tensile, through-hardening nickel-chromium-molybdenum alloy steel. It is specifically engineered to provide high strength and toughness in very large sections, making it a "heavyweight" in the engineering steel world.
1. Key Characteristics
EN28 is distinguished by its high Nickel content, which ensures deep hardening and excellent resistance to shock and fatigue.
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Deep Hardenability: Unlike lower-alloy steels, EN28 maintains its mechanical properties even in large diameters (up to 250mm and beyond).
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High Strength: Typically supplied in the "U", "V", or "W" heat-treated conditions.
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Toughness: Exceptional resistance to brittle fracture under high-impact loads.
2. Chemical Composition (BS 970 826M31)
The specific balance of Ni, Cr, and Mo allows this steel to perform in high-stress environments.
| Element | Percentage (%) |
| Carbon (C) | 0.27 0.35 |
| Nickel (Ni) | 2.30 2.80 |
| Chromium (Cr) | 0.50 0.80 |
| Molybdenum (Mo) | 0.40 0.70 |
| Manganese (Mn) | 0.45 0.70 |
| Silicon (Si) | 0.10 0.35 |
3. Mechanical Properties
In the standard "Condition U" (hardened and tempered), EN28 typically achieves:
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Tensile Strength: $925 1075 text{ MPa}$
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Yield Strength: $approx 755 text{ MPa}$ (Minimum)
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Elongation: $12% text{ (Min)}$
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Impact Strength (Izod): $40 text{ J (Min)}$
4. Typical Applications
Because EN28 can handle massive torque and stress in large cross-sections, it is the go-to for:
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Heavy Duty Shafts: Main drive shafts for marine and industrial machinery.
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Gears and Pinions: Large diameter gears requiring high surface fatigue resistance.
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Rings: Forged rings used in aerospace or heavy rotating equipment.
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Connecting Rods: For high-horsepower engines and compressors.
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Crankshafts: Especially for large-scale diesel engines.
5. Machining and Heat Treatment
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Forging: Should be performed between $1050circtext{C}$ and $1200circtext{C}$.
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Annealing: Done at $630circtext{C} 650circtext{C}$ to improve machinability.
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Hardening: Heat to $820circtext{C} 850circtext{C}$ followed by an oil quench.
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Tempering: Re-heating to $550circtext{C} 660circtext{C}$ to achieve the desired balance of strength and ductility.
Comparison Table: EN28 vs. EN24
Many engineers compare EN28 to the more common EN24 (817M40).
| Feature | EN24 (817M40) | EN28 (826M31) |
| Nickel Content | 1.3% 1.7% | 2.3% 2.8% |
| Section Size Limit | Moderate | Very Large (Deep Hardening) |
| Best Use | General High-Strength Parts |
Exceptional Mechanical Performance
EN28 alloy steel bars and rings provide high yield and tensile strength along with notable impact resistance, making them ideal for heavy-duty applications. The combination of good elongation and toughness ensures durability even under dynamic or impact loading conditions. Their mechanical properties make them a crucial material in manufacturing robust components like shafts, gears, and spindles.
Versatile Application and Customization
These EN28 steel products offer versatility in form, ranging from round bars to rings and custom shapes. Standard and custom lengths (100 mm to 6000 mm) and diameters (10 mm to 400 mm) accommodate various industrial needs. Different finishes-bright, black, peeled, or polished-and tolerances provide tailored solutions for automotive, engineering, and structural uses.
Reliable Processing and Compliance
Manufactured through hot rolled, cold drawn, and forged techniques, EN28 bars and rods undergo heat treatment (annealed, hardened & tempered) for improved properties. They meet global quality standards, ensuring consistent performance and compatibility with a wide range of engineering specifications. Corrosion resistance is moderate but can be further enhanced via specialized coatings if required.
FAQ's of En28 Alloy Steel Round Bar / EN28 Rods/ EN-28 Bars / EN28 Rings:
Q: How is the hardness of EN28 alloy steel bars determined and what is its typical range?
A: The hardness of EN28 alloy steel bars is determined through standard heat treatment processes, resulting in a typical range of 35-40 HRC. This ensures optimal strength and wear resistance for demanding applications.Q: What applications are EN28 round bars and rods best suited for?
A: EN28 round bars and rods are widely used in the manufacture of gears, shafts, connecting rods, spindles, and axles in industries such as automobiles, engineering, construction, and industrial machinery due to their high strength and toughness.Q: Where can these EN28 products be sourced from and in what forms?
A: You can source EN28 alloy steel bars, rods, and rings from leading dealers, exporters, manufacturers, retailers, and suppliers across India. They are available in round, ring, and custom shapes to meet specific needs.Q: What processing options are available for EN28 alloy steel bars?
A: EN28 bars and rods can be processed through hot rolled, cold drawn, and forging techniques. They are available in heat treated, annealed, or hardened & tempered conditions, as well as in various surface finishes like bright, black, peeled, or polished.Q: How does the material's machinability and corrosion resistance benefit its usage?
A: EN28 alloy steel boasts good machinability, allowing for efficient manufacturing, and offers moderate corrosion resistance, which can be enhanced with coatings. This makes it practical for engineered components needing reliable service life and performance.Q: What are the standard tolerances and lengths available for EN28 steel bars and rings?
A: Standard tolerances include H8, H9, H10, K12, or as specified by customer requirements. Lengths can be customized between 100 mm and 6000 mm, ensuring they fit various design and operational specifications.Tell us about your requirement
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