EN Series Steel

The EN Series (European Norm) refers to a group of medium carbon and alloy steels widely used in engineering, automotive, tooling, and general industrial applications.

These steels are known for:

1. High strength
2. Good machinability
3. Wear resistance
4. Heat treatment capability
5. Versatility in engineering applications

They are often used for shafts, gears, bolts, spindles, fasteners, tools, and mechanical components.

Most Common EN Series Steel Grades

Below is a simplified list of the most widely used EN grades and their properties:

Type: Medium Carbon Steel

Properties: High strength, good machinability

Used in: Shafts, axles, bolts, spindles, automotive parts

1. EN8 Steel (080M40)

Type: Medium Carbon Steel

Properties: High strength, good machinability

Used in: Shafts, axles, bolts, spindles, automotive parts

2. EN9 Steel (070M55)

Type: Higher Carbon Steel

Properties: Better wear resistance and hardness than EN8

Used in: Gears, keys, springs, wear plates

3. EN19 Steel (708M40 / 4140 Equivalent)

Type: Alloy Steel (Chromium-Molybdenum)

Properties: High tensile strength, shock-resistant, heat-treatable

Used in: Gears, connecting rods, high-strength shafts, machine tools

4. EN24 Steel (817M40 / 4340 Equivalent)

Type: High-Strength Alloy Steel (Ni-Cr-Mo)

Properties: Extremely tough, high fatigue resistance

Used in: Airplane parts, heavy-duty shafts, gears, crankshafts

5. EN31 Steel

Type: High Carbon Alloy Steel (Bearing Steel)

Properties: High hardness + great wear resistance

Used in: Bearings, punches, rollers, dies

6. EN36 Steel

Type: Low Carbon Nickel-Chromium Case Hardening Steel

Properties: Hard outer surface + tough core after case hardening

Used in: Gears, pins, cams, high-stress automotive parts

Where EN Series Steels Are Used

EN series steels are widely used in:

1. Automotive industry

2. Industrial machinery

3. Tool manufacturing

4. Construction components

5. Shafts & spindles

6. Gears & sprockets

7. Dies & punches

8. Heavy machinery

Why EN Series Steels Are Popular

1. High strength
2. Economical
3. Widely available
4. Easy to machine
5. Heat treatable
6. Good wear resistance