STATO 75 Steel Wire | EN FDSiCrV / EN 10270-2

Property	Value
E modulus of elasticity	206 kN/mm²
G modulus of shear	79.5 kN/mm²

Steel grades and product standards

Nearest equivalent product standards	EN 10270-2
Nearest equivalent steel grades	EN FDSiCrV

Table definitions

Reduct. of area: Min No of twists in the torsion test, Nt, are to be agreed upon.

For round wire

Diameter (mm)	Tolerance (mm)	Tensile Strength (N/mm²)	Reduct. of area (min. %)
2.00 - 2.50	±0.025	2160 - 2310	45
2.51 - 2.70	±0.025	2110 - 2260	45
2.71 - 3.20	±0.030	2110 - 2260	45
3.21 - 3.50	±0.030	2110 - 2260	42
3.51 - 4.00	±0.030	2060 - 2210	42
4.01 - 5.00	±0.035	2060 - 2210	40
5.01 - 5.60	±0.035	2010 - 2160	38
5.61 - 6.00	±0.040	1960 - 2110	38
6.00 - 6.50	±0.040	1960 - 2110	35
6.51 - 7.00	±0.040	1960 - 2110	35

Element	Weight %
C	0.50% - 0.70%
Si	1.20% - 1.65%
Mn	0.40% - 0.90%
P max.	0.030%
S max.	0.025%
Cr	0.50% - 1.00%
V	0.10% - 0.15%

Surface condition – end sample test
The wire is end sample tested by means of etch testing and binocular inspection as well as microscopical inspection of the material structure.

Max. permissible depth of partial surface decarburization and surface defects, 1.5% x wire diameter. No complete decarburization allowed.

Heat treatment

As soon as possible after coiling, the springs should be stress relieved.

Hot presetting

After shot peening, the springs should be hot preset or stress relieved. In order to reach optimum fatigue and relaxation properties, the springs must be preset at an appropriate stress.

Shot peening

In order to obtain optimum fatigue properties, the process time should be adjusted to get a complete treatment. Size of shots should be adapted to wire dimension, pitch and shot peening equipment. Shot peening of the inside of the spring coils is particularly critical.

Document	Download
Product specification	Suzuki-Garphyttan-STATO-75 (PDF, 257 KB)

STATO 75

Interested in this product?

General purpose

Alloyed Steel

Coilability

Product information

Technical specification

Mechanical properties

Chemical composition

Surface conditions

Recommendations

Documents

Steel grades and product standards

Table definitions

For round wire

Heat treatment

Hot presetting

Shot peening

Applications using STATO 75

Seat belt retractor spring

STATO 75

Interested in this product?

General purpose

Alloyed Steel

Coilability

Product information

Technical specification

Mechanical properties

Chemical composition

Surface conditions

Recommendations

Documents

Steel grades and product standards

Table definitions

For round wire

Heat treatment

Hot presetting

Shot peening

Applications using STATO 75

Seat belt retractor spring

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