EN19 Bright Bar Manufacturer & Supplier
Chromium-molybdenum bar, and the first step up from EN8 when the shaft is too highly stressed or too thick to harden through. Deep hardenability, good fatigue strength and stable at moderate temperature.
UNS: 709M40 / 42CrMo4 | Category: Alloy Steel
Size Range
Outer Diameter: Diameter 8-160 mm · Round, square, hexagon & flat sections
Chemical Composition (%)
| C | Cr | Mo | Mn | Si |
|---|---|---|---|---|
| 0.36-0.44 | 0.90-1.20 | 0.25-0.35 | 0.70-1.00 | 0.10-0.40 |
Mechanical Properties
- Tensile Strength
- 850-1000 MPa (Q&T)
- Yield Strength
- 650 MPa min
- Elongation
- 13%
- Impact
- 40 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
- Drive & transmission shafts
- Hydraulic rams
- Gears & pinions
- High tensile bolting
- Crankshafts & connecting rods
Industries Served
- Automotive & Auto Components
- Hydraulics & Pneumatics
- Oil & Gas
- Heavy Engineering
- Pumps & Valves
- General Engineering
Equivalent Grades
- AISI / SAE
- AISI 4140 / SAE 4140
- EN
- 42CrMo4
- Werkstoff / DIN
- 1.7225
- JIS
- SCM440