EN24 / AISI 4340 High Tensile Steel Manufacturer & Supplier
Through-hardening nickel-chromium-molybdenum steel, used for the loaded metal parts of defence equipment: shafts, pins, breech and mount components, where toughness at strength matters more than hardness alone.
UNS: 34CrNiMo6 / AISI 4340 / EN24 | Category: High Tensile Alloy Steel
Size Range
Outer Diameter: Bar 20 mm to 600 mm · forgings to order
Chemical Composition (%)
| C | Cr | Ni | Mo |
|---|---|---|---|
| 0.30-0.38 | 1.30-1.70 | 1.30-1.70 | 0.15-0.30 |
Mechanical Properties
- Tensile Strength
- 1000-1200 MPa (Q&T)
- Yield Strength
- 800 MPa min
- Elongation
- 11% min
- Impact
- 45 J at -40 °C
Applicable Standards
- EN 10083-3
- ASTM A29
- AMS 6414
- ASTM A370
- EN 10204 3.1
Applications
- Gun mount and breech components
- Shafts, pins, lugs and linkages
- Vehicle driveline and suspension parts
- Launcher and traverse mechanisms
- Overhaul and spares machining stock
Industries Served
- Armoured Vehicles
- Homeland Security
- Defence MRO
- Ordnance & Ammunition
- Heavy Engineering
- General Engineering
Equivalent Grades
- EN24
- EN24
- AISI 4340
- AISI 4340
- 34CrNiMo6
- 34CrNiMo6
- 1.6582
- 1.6582
- SNCM439
- SNCM439