EN8 Hot Rolled Black Square Bars – 16mm to 150mm – Tough Medium Carbon Steel for Engineering Use

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

• Standard: BS970:1955

• Grade: EN8

• Shape: Square (Hot Rolled, Black Finish)

• Size Range: 16mm to 150mm

• Condition: As Rolled / Annealed (on request)

• Finish: Black surface with mill scale

• Hardness: ~180–230 BHN (As Rolled)

• Machinability: Moderate

• Heat Treatment: Suitable for hardening and tempering

• Weldability: Limited – Preheat recommended

Applications of EN8 Black Squares

• Forgings, shafts, and levers

• Machine tool frames and plates

• Bushes, clamps, and guide blocks

• Agricultural and construction equipment

• Heavy-duty tools and dies

Advantages of EN8 Hot Rolled Squares

• Good strength and toughness balance

• Cost-effective for structural or forging use

• Readily available in multiple sizes

• Suitable for hardening and further machining

• Durable material for rugged environments

Also Available from Steelmet Industries

• EN8 in Rounds, Hexagons, and Flats

• Cold Drawn Bright Squares for tighter tolerances

• Custom supply in cut lengths and bulk packaging

• Higher-purity EN8D variant on request

• Steel bars per EN8, EN9, C45, SAE1045, 1040, S45C

Explore our manufacturing capabilities at What We Do

Global Grade Equivalents for EN8

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

• 🔩 Wide size range – 16mm to 150mm square

• ✂️ Custom lengths and cut-to-size services

• 📄 Documentation support – MTCs, TCs, lorry receipts, inspection reports

• 🚚 Scheduled delivery support for industrial projects

• 🌐 Serving India and international markets since decades

• 🛠️ 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.

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