EN24 Bright Bar Manufacturer & Supplier
Nickel-chromium-molybdenum bar for the heaviest sections. Where EN19 runs out of hardenability above roughly 100 mm, EN24 still hardens to centre and keeps impact toughness with it.
UNS: 817M40 / 34CrNiMo6 | Category: Alloy Steel
Size Range
Outer Diameter: Diameter 16-160 mm · Round, square, hexagon & flat sections
Chemical Composition (%)
| C | Ni | Cr | Mo | Mn |
|---|---|---|---|---|
| 0.36-0.44 | 1.30-1.70 | 1.00-1.40 | 0.20-0.35 | 0.45-0.70 |
Mechanical Properties
- Tensile Strength
- 930-1080 MPa (Q&T)
- Yield Strength
- 740 MPa min
- Elongation
- 12%
- Impact
- 50 J at 20 °C
Applicable Standards
- EN 10277-5 (alloy bright steel)
- EN 10278 (dimensions & tolerances)
- EN 10083-3 (quenched & tempered alloy steel)
- BS 970 Part 3
- ASTM A29 / A322
- EN 10204 3.1 certification
Applications
- Heavy duty shafts
- Gear shafts & spindles
- Aircraft & defence components
- High tensile fasteners
- Mandrels & rolls
Industries Served
- Automotive & Auto Components
- Heavy Engineering
- Defence
- Oil & Gas
- Mining Equipment
- General Engineering
Equivalent Grades
- AISI / SAE
- AISI 4340 / SAE 4340
- EN
- 34CrNiMo6
- Werkstoff / DIN
- 1.6582
- JIS
- SNCM439