Normalising
840 – 880 °C, air cool
Hardening
820 – 860 °C, oil/water quench
Tempering
540 – 680 °C (depending on required strength & toughness)
- EN 8D
| Element | Content (%) |
|---|---|
| Carbon (C) | 0.85 – 0.90 |
| Tungsten (W) | 5.50 – 6.75 |
| Molybdenum (Mo) | 4.50 – 5.50 |
| Vanadium (V) | 1.75 – 2.20 |
| Chromium (Cr) | 3.75 – 4.50 |
| Manganese (Mn) | ≤ 0.40 |
| Silicon (Si) | ≤ 0.40 |
| Phosphorus (P) | ≤ 0.030 |
| Sulfur (S) | ≤ 0.030 |
| Iron (Fe) | Balance |
Grade Brief
EN8D is a medium carbon steel grade widely used for high-strength engineering applications. It offers a good balance of strength, toughness, ductility, and machinability. Compared to standard EN8, the “D” variant is known for better ductility and machinability, making it suitable for components requiring precision and strength.
Key Features
- Medium carbon steel with good tensile strength and ductility
- Excellent machinability and dimensional accuracy
- Good wear resistance and fatigue strength
- Suitable for heat treatment to further improve hardness and strength
- Can be induction/flame hardened for higher surface hardness
Mode of Supply
Kuber Multi Metals is the largest stockiest and supplier of EN8D tool steel in flat, square and round bar. We provide steel in all sizes as your requirements. EN8D die steel is available in flat, square and round shape. Consult our team who will assist you for EN8D steel query.
Mechanical Properties
| Condition | Hardness (HRC) | Tensile Strength (MPa) | Yield Strength (MPa) | Charpy Impact (J) |
|---|---|---|---|---|
| Annealed | ~ 229 HB (~22 HRC) | ~ 860 MPa | ~ 600 MPa | High toughness |
| Hardened & Tempered | 62 – 65 HRC | ~ 3000 MPa | ~ 2200 MPa | Moderate |
Heat Treatment & Processes
Application
Automotive components (axles, shafts, spindles), Gears, studs, bolts, and connecting rods, Machine parts requiring high surface finish & wear resistance, Precision engineering components, General-purpose engineering structures
Conclusion
EN8D steel is a medium carbon steel that gives a perfect combination of strength, ductility, and machinability. Having better machinability than standard EN8, it is better applicable for precision engineering applications which require toughness and dimensional accuracy. Its heat-treatable properties to achieve increased hardness coupled with better fatigue resistance make EN8D a favorite when it comes to automotive components, machine parts, and overall engineering structures where reliability and performance are paramount.
Addition to other Grades
HCHCR-D2 Steel , HCHCR-D3 Steel , P20+Ni Steel , P20 Steel , P20 HH , Stavax ESR , DB6 Steel , H13 Steel, H11 Steel, H21 Steel, H10 Steel, H12 Steel, M2 Steel, M35 Steel, M42 Steel, T1 Steel, C 45, MS Steel, En 31, En 24 , En 353 , En 19 , En 8 , En 8D , En 9 , En 47 , 20 Mncrs , SAE8620 , DIN 2379 Steel, DIN 2080 Steel, DIN 2738 Steel, DIN 2311 Steel, DIN 2714 Steel, DIN 2344 Steel , DIN 2343 Steel, DIN 2581 Steel, DIN 2365 Steel, DIN 2606 Steel, DIN 3343 Steel, DIN 3243 Steel, DIN 3247 Steel, DIN 3355 Steel , AISI D2 Steel, AISI D3 Steel, AISI P20+Ni Steel, AISI P20 Steel, AISI L6 Steel, AISI H13 Steel, AISI H11 Steel, AISI H21 Steel, AISI H10 Steel, AISI H12 Steel, AISI M2 Steel , AISI M35 Steel, AISI M42 Steel , AISI T1 Steel
