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EN24 Steel Induction Hardening Punjab
Precision induction hardening for EN24 (817M40) nickel-chromium-molybdenum alloy steel — high-stress shafts, spindles, heavy engineering & aerospace-grade components. 55–62 HRC with certified reports.
Maximum Strength. Surface & Core.
EN24 (817M40) is a nickel-chromium-molybdenum alloy steel — the premium grade chosen when fatigue life, impact resistance, and surface hardness must coexist under the most demanding conditions. Equivalent to SAE 4340, it's specified for aerospace components, heavy-duty gearbox shafts, high-speed spindles, and defence-grade applications. Thakur Industries provides precision induction hardening for EN24 steel from our Ludhiana facility, achieving 55–62 HRC with fully certified Rockwell hardness reports.
EN24 Applications
EN24's nickel content boosts impact toughness; chromium and molybdenum provide high hardenability and temper resistance. The result is a steel that can be hardened to 55–62 HRC at the surface while the core absorbs shock loads without cracking — critical for aircraft landing gear pins, high-speed machine spindles, press tool components, and heavy gear shafts.
Why EN24 for Critical Applications?
- Highest hardenability of the EN-series — uniform HRC on large sections
- Nickel adds toughness at hardened state — resists brittle fracture
- SAE 4340 equivalent — accepted for export and OEM specifications
- Superior fatigue life under reversed bending and torsion
- Retains mechanical properties after repeated thermal cycling
Related Material Grades
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