IND
EU
US
CN
EN19/EN18A/EN18A-D/42CrMo4/SAE 4140 Equivalent Grade
EN19 Steel
EN19 is a high tensile chromium-molybdenum alloy steel widely used for demanding engineering and industrial components. Known for its strong balance of toughness, wear resistance, fatigue strength, and hardenability, it performs reliably in quenched and tempered conditions for medium to heavy section parts. EN19 is a preferred choice for shafts, gears, bolts, axles, and high-stress machinery components where consistent mechanical performance is required.
Key Features
- High tensile strength in quenched & tempered condition
- Excellent hardenability through medium and heavy sections
- Strong fatigue, shock, and wear resistance
- Good response to heat treatment and surface hardening
- Reliable machinability in the annealed state
Main Applications
- Transmission shafts, gears, and pinions
- Crankshafts, axles, and heavy-duty couplings
- High tensile bolts, studs, and fasteners
- Spindles, tie rods, and tooling components
- Automotive, oil & gas, and construction machinery parts
International Standards Comparison
| DIN/WNr | EN Name | AISI/SAE | JIS | BS |
|---|---|---|---|---|
| 1.7225 | 42CrMo4 | 4140 | SCM440 | EN19 / 708M40 |
Chemical Composition (Typical Analysis in %)
| C | Si | Mn | Cr | Mo | P (max) | S (max) |
|---|---|---|---|---|---|---|
| 0.35-0.45 | 0.10-0.35 | 0.50-0.80 | 0.90-1.40 | 0.20-0.40 | 0.035 | 0.035 |
Material Properties & Performance
- Dynamic Loading: Superior resistance to stress and shock loading.
- Wear Resistance: Enhanced surface durability after nitriding or induction hardening.
- Ductility: Maintains good elongation and reduction of area after tempering.