56Si7, 1.5026, 46Si7, 48Si7, 38Si7 – Spring Steel- Chemical composition, equivalent, properties | Alok India

1.5026 Alloy Structural Steel

Everything You Need to Know About 55Si7, 55S7, 55Si2Mn, 251A58, 9255, 1.5026 Silicon Spring Steel EN 10089: 2002


1.5026 Alloy Structural Steel Description

1.5026 alloy structural steel is silicon spring steel that can resist medium loads. Being one of the simplest steels, silicon spring steel is used to make spring elements and springs, especially in the automotive industry and railroading. The 1.5026 silicon spring steel has low ductility, hardenability and is difficult to weld.


1.5026 Alloy Structural Steel Applications 

The 1.5026 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. Disk
  2. Bumper
  3. Cone
  4. Springing rings and washers
  5. Coil springs
  6. Flat springs
  7. Spiral
  8. Safety valves
  9. Spring plates
  10. Check valves


1.5026 Alloy Structural Steel Chemical Composition

The chemical composition of 1.5026 alloy steel is:

1.5026 steel chemical element % present
Carbon (C) [Max] 0.52 to 0.60%
Manganese (Mn)  0.60 to 0.90%
Silicon (Si) [Max] 1.60 to 2.00%
Phosphorus (P) [Max] 0.025%
Sulphur (S) [Max] 0.025%


1.5026 Alloy Steel Heat Treatment

1.5026 steel hot work and heat treatment temperature
Hot Forming °C Tempering °C Normalising °C Soft Annealing °C Quenching °C
1050 to 850 670 to 720 870 680 840 to 870
Air Air Oil or Polymer


1.5026 Alloy Steel Properties

Here are the properties of 1.5026 alloy steel:

  1. High strength
  2. Medium load resistance


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