1.6511 Structural Alloy Steel

Everything You Need to Know About 36CrNiMo4, 817M37, 35NCD5, 4340, 1.6511 Alloy Steel EN 10083-1

1.6511 Alloy Steel Description

1.6511 alloy steel is a medium carbon, low alloy steel. The 36CrNiMo4 alloy steel is known for its toughness and hardness. The pre-hardened 1.6511 alloy steel can be further hardened by flame, induction hardening or nitriding. The steel is specifically used in cases where the other steel grades do not have the hardenability to provide the required strength.

1.6511 Alloy Steel Applications

The 1.6511 alloy steel has a good set of properties that makes it a suitable material to create various products and parts. It can be used in various applications. This includes:

  1. Machine building
  2. Mining machinery
  3. Aircraft landing gear
  4. Steam turbines
  5. Control parts
  6. Press parts
  7. Heavy-duty screws
  8. Motor shafts
  9. Drilling components
  10. Engine parts

1.6511 Alloy Steel Chemical Composition

The chemical composition of 1.6511 alloy steel is:

1.6511 steel chemical element % present
Carbon (C) [Max] 0.38 to 0.43%
Manganese (Mn) 0.70 to 0.90%
Silicon (Si) 0.20 to 0.35%
Chromium (Cr) 0.70 to 0.90%
Molybdenum (Mo) 0.20 to 0.30%
Nickel (Ni) 0.85 to 1.15%
Phosphorus (P) [Max] 0.040%
Sulphur (S) [Max] 0.040%

1.6511 Alloy Steel Heat Treatment

1.6511 steel hot work and heat treatment temperature
Normalising Annealing °C Soft Annealing °C Hardening °C Tempering °C
850 to 880 650 to 700 820 to 840 540 to 680
Cool in calm air Slow cooling

1.6511 Alloy Steel Properties

Here are the properties of 1.6511 alloy steel:

  1. Readily machinable
  2. Hard to weld steel

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