EN19 / 42CrMo4 Alloy Steel Manufacturer & Supplier
The workhorse through-hardening alloy forging grade. Chromium and molybdenum give deep hardenability, so a 300 mm shaft reaches its properties at the core rather than only at the surface — the reason it displaces C45 as sections grow.
UNS: 42CrMo4 / 1.7225 / EN19 | Category: Alloy Steel Forgings
Size Range
Outer Diameter: Round 80-900 mm · forged weight 10 kg to 12 T
Chemical Composition (%)
| C | Cr | Mo | Mn |
|---|---|---|---|
| 0.38-0.45 | 0.90-1.20 | 0.15-0.30 | 0.60-0.90 |
Mechanical Properties
- Tensile Strength
- 900-1100 MPa (Q&T)
- Yield Strength
- 650 MPa min
- Elongation
- 12% min
- Impact
- 35 J at -20 °C
Applicable Standards
- EN 10083-3
- EN 10250-3
- ASTM A829
- ASTM A388
- EN 10204 3.1
Applications
- Drive and pinion shafts
- Crankshafts and connecting rods
- Gear blanks and ring gears
- High pressure cylinder bodies
- Drill collars and downhole tools
Industries Served
- Heavy Engineering
- Automotive & Auto Components
- Cement & Mining
- Railways & Metro
- Pumps & Valves
- General Engineering
Equivalent Grades
- 1.7225
- 1.7225
- 42CrMo4
- 42CrMo4
- EN19
- EN19
- AISI 4140
- AISI 4140
- SCM440
- SCM440