34CrMo4,1.7220, 708A37, 35CD4, Alloy Engineering Steel – Chemical composition, equivalent, properties | Alok India

1.7220 Alloy Steel

Everything You Need to Know About 34CrMo4, 708A37, 1.7220, 35CD4 Alloy Steel 


1.7220 Alloy Steel Description

1.7220 alloy steel is a type of steel with the best mechanical properties. The 34CrMo4 steel is designed for water or oil hardening, and inductive or fire surface hardening after a thermal improvement. 35HM is used for heavy-duty construction parts, machines or equipment where high ductility, abrasion resistance and high temperatures up to 500℃ are required. In many cases, more expensive nickel grades can be substituted by this grade.


1.7220 Alloy Steel Applications 

The 1.7220 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. Hammer shafts
  2. Screws
  3. Nuts
  4. Axles
  5. Rods
  6. Engine parts


1.7220 Alloy Steel Chemical Composition

The chemical composition of 1.7220 alloy steel is:

1.7220 steel chemical element % present
Carbon (C)  0.30 to 0.37%
Manganese (Mn)  0.60 to 0.90%
Silicon (Si) 0.40%
Phosphorus (P) 0.025%
Sulphur (S) 0.035%
Chromium (Cr) 0.90 to 1.20%


1.7220 Alloy Steel Heat Treatment

1.7220 steel hot work and heat treatment temperature
Hardening °C Tempering °C Normalising °C Soft Annealing °C
830 to 860 540 to 680 850 to 880 680 to 720


1.7220 Alloy Steel Properties

Here are the properties of 1.7220 alloy steel:

  1. Good mechanical properties
  2. Highly ductile


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