EN8D Chemical Composition:

Element	C	Mn	P (Max)	S (Max)
Content	0.40-0.45	0.70-0.90	0.045 Max	0.045 Max

EN8D Mechanical Properties:

Property	Value
Max Stress	700-850 N/mm²
Yield Stress	465 N/mm² (up to 19mm LRS)
Proof Stress	450 N/mm² Min (up to 19mm LRS)
Elongation	16% Min (12% if cold-drawn)
Impact KCV	28 Joules Min (up to 19mm LRS)
Hardness	201-255 Brinell

EN8D Hardness:

EN8D steel typically has a hardness of 180-220 Brinell.

EN8D Heat Treatment:

• Tempering: Temper EN8D between 550°C to 660°C (1022°F to 1220°F) for about an hour per inch of thickness. Cool in oil or water after treatment.
• Normalizing: Occurs at 830°C to 860°C (1526°F to 1580°F), followed by air cooling.
• Quenching: Quenching in oil or water after heating will harden the steel.

EN8D Hardening:

Heat the steel to 820°C-860°C, then quench in oil or water to achieve hardness.

EN8D Tempering:

After quenching, temper immediately while the material is still warm. Reheat to the required tempering temperature and soak for 1 hour per 25mm of thickness (minimum 2 hours), then cool in air.

EN8D Physical Properties:

Property	Value
Tensile Strength	90,000 psi
Yield Strength	50,000 psi
Elongation	20% in 2”
Reduction of Area	30%
Brinell Hardness	180-220

EN8D Forging Properties:

Preheat carefully and then raise to 1050°C for forging. Avoid forging below 850°C. After forging, cool slowly in a furnace if possible.

EN8D Welding:

EN8D steel can be welded without preheating for sections up to 18mm thick using MIG wire (SG2) or a 7018 electrode. For sections thicker than 18mm, a preheat of 100°C (212°F) is recommended to prevent cracking. Post-welding annealing is advised to avoid breakage.

EN8D Normalizing:

Normalize EN8D steel at 830-860°C, followed by air cooling.

EN8D Annealing:

Heat slowly to 680-710°C, then allow it to cool slowly in the furnace to ensure annealing is complete.

Titan Steel & Engineers Related Products:

Carbon Steel, Alloy Steel, Bright Steel, Spring Steel, Die Steel & Tool Steel, Special Alloy Steel

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