Material Specifications
| Standard | BS 970 EN19 / AISI 4140 / DIN 42CrMo4 |
|---|---|
| Type | Chromium-Molybdenum (Cr-Mo) Alloy Steel |
| Carbon | 0.36–0.44% C |
| Chromium | 0.90–1.20% Cr |
| Molybdenum | 0.20–0.35% Mo |
| Tensile Strength | 850–1000 MPa (H&T) |
| Yield Strength | ≥ 700 MPa |
| Hardness | 248–302 HB (H&T) |
| Forms Available | Rounds |
EN19 vs EN8: EN19 offers significantly higher tensile strength and better hardenability than EN8 — choose EN19 when EN8 lacks the strength margin for your application.
Typical Applications
Automotive Components — Crankshafts, axle shafts, transmission parts
High-Duty Shafts — Where EN8 tensile strength is insufficient
Gears & Pinions — Quench-and-tempered gears for heavy gearboxes
Hydraulic Components — Valve bodies, cylinders, and hydraulic parts