Arquivo de etiquetas: medium carbon steel

✅ EN8 Steel – Properties, Equivalents, Applications | Steelmet Industries India

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🔩 Introduction

EN8 steel is a popular medium carbon steel grade known for its good tensile strength and machinability. It offers excellent performance in applications requiring strength, wear resistance, and moderate toughness. EN8 is used extensively across industries for producing shafts, axles, studs, keys, bolts, and machine parts.

At Steelmet Industries, we supply EN8 steel bars in a wide variety of shapes and conditions – hot rolled, peeled, bright drawn, and custom-profiled, ensuring dimensional accuracy and consistent quality. Whether your requirement is for small precision parts or heavy-duty industrial components, Steelmet is your trusted source.

📊 Chemical Composition of EN8 Steel (Typical)

Element Content (%)
Carbon (C) 0.36 – 0.44
Manganese (Mn) 0.60 – 1.00
Silicon (Si) 0.10 – 0.40
Sulphur (S) ≤ 0.050
Phosphorus (P) ≤ 0.050

Note: Clean steel options available with lower S & P upon request.

🧪 Mechanical Properties (Typical, in normalized condition)

Property Value
Tensile Strength 550 – 700 MPa
Yield Strength 280 – 450 MPa
Elongation (in 50 mm) 13 – 16%
Hardness (BHN) 180 – 230
Impact Strength (Izod) 40 – 55 J (approx)

Heat-treated variants can offer higher tensile strength and hardness.

🧾 Equivalent Grades

Standard Grade
AISI/SAE 1040 / 1045
IS 40C8 (IS 1570)
DIN/EN C40 / C45
JIS S45C
BS 080M40

⚙️ Common Applications

EN8 steel is widely used in:

  • Transmission shafts and axles

  • Automotive parts (gears, bolts, crankshafts)

  • Agricultural and farm equipment

  • General engineering components

  • Machinery spindles, studs, and couplings

  • Railway and mining parts

🔧 Machinability, Weldability & Heat Treatment

  • Machinability: Excellent in normalized and cold drawn condition.

  • Weldability: Fair – Preheat and post-weld heat treatment recommended.

  • Heat Treatment: EN8 responds well to hardening, tempering, normalizing, and annealing.

  • Hardening Range: Up to HRC 50 with oil quenching.

  • Surface Finish: Bright drawn or ground finish available for high-precision requirements.

🔄 EN8 Steel Forms Supplied by Steelmet Industries

At Steelmet Industries, we supply EN8 steel bars in the following forms:

  • Bright Steel Bars – Drawn / Peeled / Ground

  • Hot Rolled Steel Bars

  • Custom Special Profiles – Round Corner Squares, Half Rounds, Tapered Flats

  • Shapes: Rounds, Squares, Flats, Hexagons, Special

Size Range:

  • Rounds: 10 mm to 150 mm

  • Flats/Squares: Width/height as per requirement

  • Lengths: Custom cut lengths up to 5.5–6 meters or as required

Tolerances: As per IS/EN/AISI or custom tolerances.

🏭 Why Buy EN8 from Steelmet Industries?

  • ✅ Superior dimensional accuracy & finish

  • ✅ Custom sizes and shapes available

  • ✅ VD (Vacuum Degassed) and non-VD options

  • ✅ Fast delivery & flexible MOQs

  • ✅ Full traceability with test certificates

  • ✅ Access to NABL-certified labs for testing

We ensure consistency, traceability, and performance – making us a reliable partner for your steel needs.

📜 Documentation & Compliance

  • TCs for Chemistry & Mechanical Properties

  • Conformance to IS, DIN, EN, ASTM standards

  • Dimensional Inspection Reports

  • Clean steel (low S & P) variants upon request

📞 Get in Touch

Looking for reliable EN8 steel bar suppliers in India?
Steelmet Industries has you covered.

👉 Visit us at: https://www.steelmet.in

Let’s help you source the right grade, the right shape, at the right time.

EN8 vs EN8A vs EN8B vs EN8C vs EN8D vs EN8M vs EN8DM: Complete Steel Grade Comparison

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Introduction

The EN8 series represents a family of versatile medium-carbon steels with subtle variations that impact machinability, strength, and heat treatment response. This guide compares:

  • Chemical composition differences

  • Mechanical properties

  • Optimal heat treatment

  • Recommended applications

Steelmet Industries supplies all EN8 variants as:
🔹 Round bars (Ø 10mm – 300mm)
🔹 Flat bars and forged blanks
🔹 Turned or ground precision stock

Chemical Composition Comparison

Grade C% Si% Mn% P% S% Other
EN8 0.36-0.44 0.10-0.40 0.60-1.00 ≤0.05 ≤0.05 –
EN8A 0.36-0.44 0.10-0.40 0.60-1.00 ≤0.05 ≤0.05 Improved purity
EN8B 0.36-0.44 0.10-0.40 0.60-1.00 ≤0.05 ≤0.05 Lead added
EN8C 0.36-0.44 0.10-0.40 0.60-1.00 ≤0.05 ≤0.05 Sulfur increased
EN8D 0.36-0.44 0.10-0.40 0.60-1.00 ≤0.05 ≤0.05 Controlled Mn
EN8M 0.36-0.44 0.10-0.40 0.90-1.50 ≤0.05 ≤0.05 Higher Mn
EN8DM 0.36-0.44 0.10-0.40 0.90-1.50 ≤0.05 ≤0.05 Higher Mn + controlled chemistry

🔹 Key Variations:

  • EN8B: Contains lead (Pb) for improved machinability

  • EN8C: Higher sulfur for better chip formation

  • EN8M/EN8DM: Increased manganese for better hardenability

Mechanical Properties (Normalized Condition)

Grade Tensile (MPa) Yield (MPa) Elongation (%) Hardness (BHN)
EN8 700-850 460 14 201-255
EN8A 700-850 460 14 201-255
EN8B 700-850 460 14 201-255
EN8C 700-850 460 14 201-255
EN8D 700-850 460 14 201-255
EN8M 800-950 550 12 248-302
EN8DM 800-950 550 12 248-302

✅ EN8M/EN8DM offer 15-20% higher strength due to increased manganese

Key Differences & Applications

1. Machinability Comparison

  • Best Machinability: EN8B (lead added) > EN8C (sulfur added) > Standard EN8

  • EN8M/EN8DM: Require more power but maintain good tool life

2. Heat Treatment Response

  • EN8M/EN8DM: Achieve deeper hardening (ideal for large sections)

  • Standard EN8: Suitable for smaller components

3. Recommended Uses

  • EN8/EN8A: General engineering components, shafts, bolts

  • EN8B/EN8C: High-volume machined parts (gears, fittings)

  • EN8M/EN8DM: Heavy-duty gears, high-stress components

Equivalents & Alternatives

Grade AISI DIN ISO
EN8 1040 1.0511 C40
EN8M 1045 1.1191 C45

For better machinability: EN1A (free-cutting steel)

Selection Guide

  • General purpose: EN8/EN8A

  • Mass machining: EN8B/EN8C

  • Heavy sections/strength: EN8M/EN8DM

Steelmet Industries provides:
🔹 All EN8 variants in stock
🔹 Custom heat treatment (quenching & tempering)
🔹 Precision ground bars (h9 tolerance)

📞 Contact our technical team for grade recommendations.

Conclusion

While all EN8 grades share similar base composition, subtle variations significantly impact their performance in machining, heat treatment, and final applications.

Steelmet Industries maintains ready stock of all EN8 variants – from standard EN8 to specialty EN8DM. Request a quote for your specific requirements.

EN 10083-2 C18E vs. EN 10277 C18 vs. EN 10278 C15E Steel: Composition, Differences, and Equivalences

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Introduction

When selecting the right steel grade for your project, understanding subtle differences in composition and standards is crucial. EN 10083-2 C18E, EN 10277 C18, and EN 10278 C15E are widely used in automotive, machinery, and general engineering—but how do they compare?

This guide breaks down their chemical composition, similarities, key differences, and potential equivalences. Plus, discover how SteelMet Industries provides these grades in multiple shapes, sizes, and conditions to meet your specific needs.

Chemical Composition Comparison

Element (%) EN 10083-2 C18E EN 10277 C18 EN 10278 C15E
Carbon (C) 0.15 – 0.21 0.15 – 0.21 0.12 – 0.18
Silicon (Si) 0.15 – 0.40 ≤ 0.40 ≤ 0.40
Manganese (Mn) 0.60 – 0.90 0.60 – 0.90 0.60 – 0.90
Phosphorus (P) ≤ 0.025 ≤ 0.035 ≤ 0.035
Sulfur (S) ≤ 0.025 ≤ 0.035 ≤ 0.035
Chromium (Cr) ≤ 0.40 ≤ 0.40 ≤ 0.40
Other Elements – – Lead (Pb) may be added

🔹 Key Takeaway: While C18E and C18 are nearly identical chemically, C15E has slightly lower carbon and may include lead for machinability.

Key Similarities & Differences

✔ Similarities:

✅ Medium-carbon steels – Good balance of strength and formability.
✅ Manganese & Silicon ranges – Comparable across all three grades.
✅ General applications – Used in gears, shafts, bolts, and structural components.

❌ Differences:

🔸 EN 10083-2 C18E – Stricter P & S limits (≤0.025%), optimized for quenching & tempering.
🔸 EN 10277 C18 – Designed for bright steel products (cold-finished bars).
🔸 EN 10278 C15E – Lower carbon (0.12-0.18%) and may contain lead for free-cutting applications.

Equivalences & Alternative Grades

  • EN 10083-2 C18E ≈ EN 10277 C18 (chemically similar, different processing standards).

  • EN 10278 C15E is similar to AISI 1117 (lead-free) or 12L14 (leaded) for machining.

Which Steel Grade Should You Choose?

  • Need high strength after heat treatment? → EN 10083-2 C18E

  • Precision bright steel components? → EN 10277 C18

  • Superior machinability? → EN 10278 C15E

At SteelMet Industries, we supply these steel grades in:
🔹 Round bars, flat bars, hex bars
🔹 Cold-drawn, turned, or precision-ground
🔹 Custom sizes & conditions (annealed, hardened, etc.)

📞 Contact us today for a quote tailored to your project requirements!

Conclusion

Understanding the differences between EN 10083-2 C18E, EN 10277 C18, and EN 10278 C15E helps in selecting the right material for durability, machinability, or heat treatment.

SteelMet Industries stocks these grades in multiple forms and conditions—ensuring you get the exact steel solution for your application.