We manufacture forging ingots, billets, and blooms in alloy steel specifically for En18C, developed for high-strength engineering and automotive applications requiring improved toughness and cleanliness.
En18C is a medium carbon chromium alloy steel, similar in chemistry to En18, but supplied with controlled sulphur content to enhance machinability. It offers high tensile strength, good toughness, and excellent wear resistance after heat treatment.
The chromium content improves hardenability and wear resistance, enabling effective through hardening. En18C provides better machinability than standard En18 while maintaining good dimensional stability after heat treatment, making it suitable for forging and precision machining operations.
This grade delivers a reliable balance of strength, machinability, and durability for demanding industrial applications.
| Element | Content (%) | Function / effect |
| Carbon (c) | 0.35 – 0.45 | Provides strength and hardness |
| Manganese (mn) | 0.60 – 0.90 | Improves hardenability and toughness |
| Silicon (si) | 0.15 – 0.35 | Enhances strength and elasticity |
| Chromium (cr) | 0.90 – 1.20 | Increases hardness and wear resistance |
| Sulphur (s) | 0.040 – 0.070 | Improves machinability |
| Phosphorus (p) | Max 0.035 | Controlled impurity |
Heat treatment cycles can be adjusted to balance machinability, strength, and toughness as per application requirements.
En18C is comparable to the following grades:
(exact equivalence depends on sulphur control and supply condition.)
En18C is ideal for components requiring good mechanical strength along with improved machinability. It reduces machining time and tool wear while delivering reliable performance in medium to high-stress applications.
| Grade | Carbon (%) | Key applications | Heat treatment | Comments |
| En18C | 0.35 – 0.45 | Machined shafts, gears | Quenching & tempering | Better machinability |
| En18 | 0.35 – 0.45 | General engineering | Q&t | Standard grade |
| 41Cr4 | 0.38 – 0.45 | Automotive components | Q&t | Close equivalent |
| En19 | 0.38 – 0.45 | Heavy-duty parts | Q&t | Higher strength |
En18C is a machinability-enhanced chromium alloy steel offering good strength, wear resistance, and dimensional stability. It is widely used in automotive and engineering applications where machining efficiency is critical.