TECHNICAL INFORMATION

Anasayfa / Technical Information / Spring Steels

SPRING STEELS

The desired properties in steels to be used as spring material can be described as sufficient load strength, good flexibility, unlimited safety against breakage. These properties can only be possible with proper steel selection and heat treatment. It is essential that the material does not lose its ductility by increasing the load strength.

One of the important issues to be considered in the production of flexible parts is the inconvenience of welding the parts. Additionally; Events such as surface notch effect, internal cracks that may arise from heat treatment, decarburation that occurs on the surface and which disrupts the homogeneous hardness of the material can be specified as the reasons that increase the fracture effect. In addition, processes such as sensitivity of surface roughness, thermochemical hardening (nitrification), sandblasting can be said to reduce the risk of breakage.

If the steel material is formed at room temperature, high bending stresses occur, which reduces the flexibility of the manufactured part. For this reason, annealing of shaped parts at low temperatures is appropriate.

  • SPRING STEELS AND COMPOSITIONS
  • MECHANICAL PROPERTIES FOR SPRING STEELS
SPRING STEELS AND COMPOSITIONS

ITEM NUMBER

DIN

SAE/AISI

C

Si

Mn

Pmax

Smax

Cr

Mo

Nmax

1.0900

38 Si 6

-

0.35-0.42

1.40-1.60

0.50-0.80

0.050

0.050

-

-

0.007

1.0902

46 Si 7

-

0.42-0.50

1.50-1.80

0.50-0.80

0.050

0.050

-

-

0.007

1.0903

51 Si 7

-

0.47-0.55

1.50-1.80

0.50-0.80

0.045

0.045

-

-

0.007

1.0904

55 Si 7

9255

0.52-0.60

1.50-1.80

0.70-1.00

0.045

0.045

-

-

-

1.0906

65 Si 7

-

0.60-0.68

1.50-1.80

0.70-1.00

0.050

0.050

-

-

0.007

1.0908

60 SiMn 5

-

0.55-0.65

1.00-1.30

0.90-1.10

0.050

0.050

-

-

0.007

1.0961

60 SiCr 7

9262

0.55-0.65

1.50-1.80

0.70-1.00

0.045

0.045

0.20-0.40

-

0.007

1.0970

38 Si 7

-

0.35-0.42

0.15-035

0.50-0.80

0.045

0.045

-

-

0.007

1.1231

Ck 67

1070

0.65-0.72

0.15-0.35

0.60-0.90

0.035

0.035

-

-

-

1.1248

Ck 75

1075

0.70-0.80

0.15-0.35

0.60-0.80

0.035

0.035

-

-

-

1.1269

Ck 85

1086

0.80-0.90

1.50-1.80

0.45-0.65

0.035

0.035

-

-

-

1.1274

Ck 101

1095

0.95-1.05

0.15-0.35

0.40-0.60

0.035

0.035

-

-

-

1.5028

65 Si 7

-

0.60-0.70

1.50-1.80

0.70-1.00

0.035

0.035

-

-

-

1.5029

71 Si 7

-

0.68-0.75

1.50-1.80

0.60-0.80

0.035

0.035

-

-

-

1.5225

51 MnV 7

-

0.48-0.55

0.15-0.35

1.60-1.90

0.035

0.035

-

-

-

1.7103

67 SiCr 5

-

0.62-0.72

1.20-1.40

0.40-0.60

0.035

0.035

0.40-0.60

-

-

1.7138

52 MnCrB 3

50B50

0.48-0.55

0.15-0.35

0.75-1.00

0.035

0.035

0.40-0.60

B 0.0005

1.7176

55 Cr 3

5155

0.52-0.59

0.15-0.40

0.70-1.00

0.035

0.035

0.60-0.90

-

-

1.7701

51 CrMoV 7

-

0.48-0.56

0.15-0.40

0.70-1.00

0.035

0.035

0.90-1.20

0.15-0.25

-

1.8159

51 CrV 4

6150

0.47-0.55

0.00-0.40

0.70-1.00

0.035

0.035

0.90-1.20

-

-

1.8161

58 CrV 4

-

0.55-0.62

0.15-0.40

0.70-1.00

0.035

0.035

0.90-1.20

-

-

MECHANICAL PROPERTIES FOR SPRİNG STEELS


ITEM NUMBER


DIN


SAE/AISI


YIELD POINT (N/mm2)

TENSİLE STRENGTH

(N/mm2)

ELONGATİON AT RUPTURE (%)

1.0900

38 Si 6

-

1030

1180-1370

6

1.0902

46 Si 7

-

1080

1275-1470

6

1.0903

51 Si 7

-

1130

1320-1570

6

1.0904

55 Si 7

9255

1080

1275-1470

6

1.0906

65 Si 7

-

1080

1275-1470

6

1.0908

60 SiMn 5

-

1030

1320-1520

6

1.0961

60 SiCr 7

9262

1130

1320-1570

6

1.0970

38 Si 7

-

1030

1180-1370

6

1.7103

67 SiCr 5

-

1320

1470-1670

6

1.7176

55 Cr 3

5155

1180

1370-1620

6

1.7701

51 CrMoV 7

-

1180

1370-1670

6

1.8159

51 CrV 4

6150

1180

1370-1620

6

1.8161

58 CrV 4

-

1320

1470-1670

6

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