GARBA 188L

Stainless spring wire

GARBA 188 is a general-purpose austenitic stainless steel, which is used for springs and other components requiring good fatigue resistance. GARBA 188L has a higher formability as compared to GARBA 188 due to its lower carbon content.

Chemische Zusammensetzung

C (%) Si (%) Mn (%) P max. (%) S max. (%) Cr (%) Ni (%)
0,08 1,00 2,00 0,040 0,015 18,00 - 20,00 8,50 - 10,00

Mechanische Eigenschaften

Für Runddraht

Durchmesser (mm) Toleranz (mm) Zugfestigkeit (N/mm²)
0,30 - 0,50 ±0,005 -
0,51 - 0,70 ±0,008 -
0,71 - 0,83 ±0,009 -
0,84 - 1,00 ±0,010 -
1,01 - 1,60 ±0,011 -
1,61 - 2,50 ±0,014 -
2,51 - 4,00 ±0,018 -
4,01 - 6,30 ±0,022 -
6,31 - 8,00 ±0,028 -
0,30 - 0,40 1785 - 2000
0,41 - 0,70 1700 - 1910
0,71 - 1,00 1650 - 1830
1,01 - 1,50 1530 - 1740
1,51 - 2,00 1445 - 1650
2,01 - 2,80 1360 - 1570
2,81 - 4,00 1275 - 1490
4,01 - 6,00 1190 - 1400
6,01 - 8,00 1105 - 1320

Oberflächenbeschaffenheiten

Surface performance
AC-surface 0.30–8.00 mm Ø. The AC-coating can be removed before heat treatment by using a 10-20% nitric acid pickle at room temperature.

Physikalische Eigenschaften

E und G Elastizitätsmodul

Abt. 180 kN/mm2 in drawn condition.
Abt. 185 kN/mm2 after heat treatment.

E und G Schubmodul

Abt. 70 kN/mm2 in drawn condition.
Abt. 73 kN/mm2 after heat treatment.
Density: 7.90 kg/dm3.

Wärmeleitfähigkeit

Temperature oC 20 100 200 400
W/(m* oC) 15.0 15.5 17.5 20.0

Längenausdehnung

Pro oC 30-100 30-200 30-300
x10-6 17.0 17.5 18.5

Empfehlungen

Wärmebehandlung

As soon as possible after coiling, the springs should be stress relieved.
Recommended temperature for compression springs or tension springs without initial tension is approx. 350ºC for 0.5 - 3 hours.