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BS EN18 / DIN 1.7035 Equivalent Grade
EN 18/41Cr4
EN18 is a British-standard medium carbon chromium engineering steel widely selected for components that require higher strength, wear resistance, and good toughness after heat treatment. As an equivalent to DIN 41Cr4 and AISI 5140, it is used for shafts, axles, studs, gears, and general machine parts that operate under repeated load and impact. EN18 also offers dependable machinability in the annealed state and responds well to induction hardening and quenched-and-tempered service conditions.
Key Features
- High strength and toughness after quenching & tempering
- Good wear resistance for loaded engineering parts
- Suitable for induction hardening and surface strengthening
- Good machinability in the annealed condition
- Consistent hardenability through medium sections
Main Applications
- Drive shafts, spindles, and axles
- High-tensile bolts, studs, and pins
- Gears, couplings, and crank components
- General machine and automotive components
- Agricultural, industrial, and drivetrain parts
International Standards Comparison
| DIN/WNr | EN Name | AISI/SAE | JIS | BS |
|---|---|---|---|---|
| 1.7035 | 41Cr4 | 5140 | SCR440 | EN18 / 530M40 |
Chemical Composition (Typical Analysis in %)
| C | Si | Mn | Cr | P (max) | S (max) |
|---|---|---|---|---|---|
| 0.38-0.45 | 0.10-0.40 | 0.50-0.80 | 0.90-1.20 | 0.025 | 0.035 |
Steel Properties & Performance
- Hardenability: Reliable through-hardening for uniform strength.
- Toughness: Excellent resistance to dynamic loads and shock.
- Build Quality: Preferred grade for general machine building due to structural integrity.