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Grade Introduction:
EN36C Alloy Steel is a Nickel-Chromium Case hardening steel which is suitable for deep hardening to develop a touch core is suitable for gears, cams rollers available in diameters only. EN36C Alloy Steel is a carburizing steel grade with very high surface strength with a soft but strong core. The material retains a remarkable degree of toughness. With high tensile strength, EN36C is used in the production of numerous high-strength parts including crankshafts in the automotive and aerospace sector. En36C is used specifically in heavy-duty and highly stressed applications due to its hardenability toughness and high core strength. EN36C also offers excellent fatigue resistance. EN36C gives a hard case with a strong core, whilst retaining a remarkable degree of toughness.
Grade Application:
As a carburizing steel grade, it is suitable for roller and ball bearings of an extra light section, airplane and motor crankshafts requiring hard surfaces for roller paths, connecting rods with case-hardened ends, as well as highly stressed gudgeon pins, gears, and certain types of collects.
Equivalent grades:
| BS 970 1991 | BS 970 1955 EN | AISI/SAE | WERKSOFF |
|---|---|---|---|
| 655M13 | EN36 | 3415 | 1.5752 |
Addition to other grades:
MS, EN1A, EN3B, EN8, EN8D, EN9, EN19, EN24, EN31, EN32B, EN41B, EN43B, En47, EN353, IS2062, 42Crmo4, HCHCR, D2, D3, H-11, H-13, CW-1, OHNS, M2, M35, M42, 2714, SKD-11, P20, P20+s, P20+Ni, ASTM Sa-36, ASTM SA-105, SAE 1018, SAE 4140, SAE 8620, 16MNCR5, 20MNCR5, C20, C35, C40, C45, C50, C60, CK45, 20C8, 40C8, 45C8, 55C8, C55MN75, SAE52100, S40C, S355J2G3.
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Chemical composition:
The following table shows the chemical composition of En19 steel:
| Element | C | Mn | Si | Ni | Mo | Cr | S | P |
|---|---|---|---|---|---|---|---|---|
| Content (%) | 0.12-0.18 | 0.30-0.60 | 0.10-0.35 | 3.00-3.75 | 0.10-0.25 | 0.60-1.10 | 0.05 Max | 0.05 Max |
Mechanical Properties:
| Tensile Strength N/ mm² | Elongation % | Impact Izod J | Impact KCV J | Hardness HB | Reduction of Area % |
|---|---|---|---|---|---|
| 1100 | 15 | 40 | 35 | 341 | 50 |
Hardness:
341
Heat Treatment:
Heat treatment temperatures, including the rate of heating, cooling, and soaking times will vary due to factors such as the shape and size of each EN36C steel component. Other considerations during the heat treatment process include the type of furnace, quenching medium, and workpiece transfer facilities. Please consult your heat treatment provider for full guidance on heat treatment of EN36C case hardening steel.
Hardening:
Harden at 760/780°C then quenches in oil.
Tempering:
Temper in oil at a temperature of 150/200°C will alleviate stresses and the risks of cracking.
Physical Properties
| DENSITY (G/CM 3) | 8.08 |
| DENSITY (LB/IN 3) | 0.292 |
| MELTING POINT (°C) | 1425 |
| MELTING POINT (°F) | 2600 |
Thermal Properties
| Average Coefficient of Linear Thermal Expansion (μm/m.K) | |||||||
|---|---|---|---|---|---|---|---|
| Temp. (°C) | Modulus of elasticity (GPA) | Mean coefficient of thermal expansion 10-6/(°C) between 20(°C) | Thermal conductivity (W/m·°C) | Specific thermal capacity (J/kg·°C) | Specific electrical resistivity (Ω mm²/m) | Specific electrical resistivity (Ω mm²/m) | Poisson’s coefficient, ν |
| 13 | — | — | — | — | 0.23 | — | — |
| 697 | 912 | — | 32.3 | 333 | — | — | — |
| 634 | — | 44 | 21.2 | — | — | 141 | 213 |
Forging Properties:
Soak for 1 hour at 2150 F (1177 C) prior to forging. Do not work below 1850 F (1010 C). Post-work solution treatment is required prior to final hardening.
Stress Relieving:
Heat to 600°C – 650°C, Cool in still air.
Normalizing:
Heat to 890°C – 920°C, Cool in still air.
Annealing:
Heat to 830°C – 850°C, Cool in a furnace.
Density:
DENSITY (G/CM 3) – 8.08
Machinability:
En36C offers very good machinability and weldability when supplied in the annealed condition, although when welded the material should be stress relieved after cooling. Welding is not however recommended in the heat-treated or carburized condition. Machinability options including turning, milling, drilling, and tapping are all suitable as long as the tool type, feeds and speeds are used in accordance with the machine manufacturer’s recommendations.
Welding:
Readily weldable in the annealed supplied condition.
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