EN8, as per BS970:1955, is a widely used medium carbon steel offering an ideal balance between strength, hardness, and machinability. At Steelmet Industries, we supply EN8 Hot Rolled Black Square Bars in a comprehensive size range from 16mm to 150mm, serving diverse sectors such as heavy engineering, agriculture, tool making, and automotive component manufacturing.
Hot rolled square bars provide a robust starting material for forgings, machine bases, structural applications, and heavy-duty components where tight dimensional tolerances are not critical in the as-supplied condition.
Key Technical Details
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Standard: BS970:1955
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Grade: EN8
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Shape: Square (Hot Rolled, Black Finish)
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Size Range: 16mm to 150mm
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Condition: As Rolled / Annealed (on request)
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Finish: Black surface with mill scale
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Hardness: ~180–230 BHN (As Rolled)
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Machinability: Moderate
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Heat Treatment: Suitable for hardening and tempering
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Weldability: Limited – Preheat recommended
Applications of EN8 Black Squares
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Forgings, shafts, and levers
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Machine tool frames and plates
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Bushes, clamps, and guide blocks
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Agricultural and construction equipment
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Heavy-duty tools and dies
Advantages of EN8 Hot Rolled Squares
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Good strength and toughness balance
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Cost-effective for structural or forging use
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Readily available in multiple sizes
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Suitable for hardening and further machining
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Durable material for rugged environments
Also Available from Steelmet Industries
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EN8 in Rounds, Hexagons, and Flats
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Cold Drawn Bright Squares for tighter tolerances
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Custom supply in cut lengths and bulk packaging
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Higher-purity EN8D variant on request
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Steel bars per EN8, EN9, C45, SAE1045, 1040, S45C
Explore our manufacturing capabilities at What We Do
Global Grade Equivalents for EN8
| Standard | Equivalent Grade |
|---|---|
| AISI / SAE | 1040 / 1045 |
| EN (New) | C45E / C40E (EN10083) |
| DIN | CK45 / 1.1191 |
| ISO | C45 |
| JIS | S45C |
| GOST | 45 |
| IS | IS 1570 C45 |
| BS (Old) | EN8 |
| BS (New) | 080M40 |
| GB (China) | 45# |
Note: Equivalent grades listed above are based on similar chemical composition. Users should verify exact mechanical properties and applications before substitution. For more, see BS970:1955 Specification.
Steelmet Industries – Consistency You Can Count On
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🔩 Wide size range – 16mm to 150mm square
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✂️ Custom lengths and cut-to-size services
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📄 Documentation support – MTCs, TCs, lorry receipts, inspection reports
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🚚 Scheduled delivery support for industrial projects
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🌐 Serving India and international markets since decades
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🛠️ Trusted for engineering-grade steels
See our Quality Policy and explore other Specifications
Frequently Asked Questions – EN8 Black Square Bars
Q1: What is the surface condition of EN8 hot rolled black squares?
A: These bars have a black oxide layer (mill scale) from the hot rolling process, suitable for rough machining or forging applications.
Q2: Are EN8 black squares supplied annealed?
A: As standard, they are hot rolled. Annealing or normalizing can be arranged upon request for better machinability.
Q3: Can I get third-party inspection or test certificates?
A: Yes. Upon prior agreement, Steelmet Industries can supply third-party inspection reports, internal QC reports, and MTCs.
Q4: Is EN8 black square weldable?
A: It is weldable with pre-heating and post-weld treatment. Welding is not as straightforward as low-carbon steels.
Q5: What sizes are available ex-stock?
A: Sizes from 16mm to 150mm square are commonly available. Custom requirements can also be produced.
Enquire Today
📞 India: 0712-2728071
🌐 Website: www.steelmet.in
📱 WhatsApp: +917122728071
📞 International: +91-712-2728071
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