EN 36C round, square and flat bar — ready stock in Mumbai
We supply EN 36C (655M13) as round, square and flat bar from ready stock in Mumbai. Every order is cut to length and ships with a mill test certificate.
EN 36C is a premium 3% nickel-chromium case-hardening steel offering outstanding core toughness and shock resistance. The high nickel content suits the most demanding, heavily loaded gearing, bearing and crankshaft duties where reliability under impact is critical.
Typical composition limits (weight %). Balance iron.
| Element | Min % | Max % |
|---|---|---|
| Carbon (C) | 0.12 | 0.18 |
| Silicon (Si) | 0.10 | 0.35 |
| Manganese (Mn) | 0.30 | 0.60 |
| Phosphorus (P) | — | 0.035 |
| Sulphur (S) | — | 0.035 |
| Chromium (Cr) | 0.80 | 1.20 |
| Nickel (Ni) | 3.00 | 3.75 |
| Molybdenum (Mo) | 0.10 | 0.25 |
Typical values in the carburised, hardened and tempered condition.
| Property | Typical value |
|---|---|
| Case hardness (surface) | 60–62 HRC |
| Core hardness | 30–45 HRC |
| Core tensile strength | 900–1200 MPa |
| Core elongation A5 | 10–14 % |
| Supply hardness (annealed) | max. 255 HB |
| Transformation point | Temperature (°C) |
|---|---|
| Ac1 | 700 |
| Ac3 | 780 |
| Ms (core) | 360 |
| Treatment | Temperature cycle | Cooling / quenching |
|---|---|---|
| Normalizing | 850–880 °C | In still air |
| Carburising | 900–925 °C | Case depth to requirement |
| Core refining | 840–870 °C | Quench in oil |
| Hardening | 780–820 °C | Quench in oil |
| Tempering | 150–200 °C | In air |
| Soft annealing | 650 °C | Furnace cool |
Indicative hardness gradient from the carburised surface into the tough core, for a typical effective case depth. Actual profile is set by the carburising cycle.
Typical values at ambient temperature unless stated.
| Property | Typical value |
|---|---|
| Young’s modulus | 205 GPa |
| Poisson’s ratio | 0.30 |
| Shear modulus | 80 GPa |
| Density | 7,850 kg/m³ |
| Thermal expansion (20–300 °C) | 11.5 µm/m·K |
| Specific heat | 460 J/kg·K |
| Thermal conductivity | 38 W/m·K |
| Electrical resistivity | 0.22 µΩ·m |
Need EN 36C in a specific size?
We hold ready stock from Ø14mm to Ø315mm. Send us the size and quantity for a fast quote.
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