Chromium-Vanadium Spring Steel For High-Stress Applications
EN 47 is a chromium-vanadium spring steel designed for components exposed to repeated loading, shock, vibration and fatigue.
Available Forms: Round Bars | Flats | Blocks | Custom Sizes
Performance under repeated stress
En 47 material composition
A commonly referenced composition for en 47 / 50crv4 is:
| Element | Composition |
|---|---|
| Carbon (C) | 0.47 – 0.55% |
| Silicon (Si) | ≤ 0.40% |
| Manganese (Mn) | 0.70 – 1.10% |
| Chromium (Cr) | 0.90 – 1.20% |
| Vanadium (V) | 0.10 – 0.25% |
| Phosphorus (P) | ≤ 0.035% |
| Sulphur (S) | ≤ 0.035% |
| Iron (Fe) | Balance |
| Element | Composition |
|---|---|
| Carbon (C) | 0.47 – 0.55% |
| Silicon (Si) | ≤ 0.40% |
| Manganese (Mn) | 0.70 – 1.10% |
| Chromium (Cr) | 0.90 – 1.20% |
| Vanadium (V) | 0.10 – 0.25% |
| Phosphorus (P) | ≤ 0.035% |
| Sulphur (S) | ≤ 0.035% |
| Iron (Fe) | Balance |
Where en 47 is used
En 47 is particularly suited to components subjected to repeated mechanical loading.
Automotive
Leaf springs
Coil springs
Suspension components
Clutch springs
Industrial
Torsion bars
Heavy-duty springs
Spring washers
High-strength spring components
Engineering
Agricultural springs
Trailer components
Shock-loaded components
Dynamic load components
Spring and suspension applications are widely associated with en 47 / 50crv4.
Control the hardness. Develop the spring performance.
En 47 is generally supplied in a suitable soft condition for machining/forming and can subsequently be oil hardened and tempered.
Typical process
01 — heating
Heat to the appropriate austenitizing temperature according to the material standard and component size.
02 — oil quenching
Oil quenching is commonly used for hardening en 47.
03 — tempering
Tempering follows hardening to establish the required balance between strength, hardness and toughness.
04 — final component properties
The final properties depend on section size, heat-treatment parameters and tempering temperature.
Available in the form you need
Round bars
For springs, shafts and machined engineering components.
Flat bars
Suitable for spring and fabricated component requirements.
Blocks
For machining and specialized component manufacturing.
Custom sizes
Material preparation according to customer requirements.
From standard stock to custom requirements
Tsi metals can present en 47 according to the required supply condition, subject to availability:
As rolled
Annealed / soft condition
Spheroidized annealed
Hardened & tempered
Full length
Cut-to-size
En 47 is commonly supplied in annealed/as-rolled condition before subsequent hardening and tempering.
Share your requirement with our team and get the right steel solution for your application.
