GARBAFLEX CrSi91
Flat and shaped wire for surface nitriding
GARBAFLEX CrSi91 is especially intended for application requiring extremely high fatigue properties and good relaxation properties at increased working temperatures.
| C (%) | Si (%) | Mn (%) | Cr (%) | V (%) | Mo (%) | P max. (%) | S max. (%) |
|---|---|---|---|---|---|---|---|
| 0.50 - 0.70 | 1.80 - 2.20 | 0.30 - 0.60 | 0.80 - 1.00 | 0.05 - 0.15 | 0.05 - 0.15 | 0.020 | 0.020 |
For flat rolled wire
| Width (mm) | Tolerance (mm) |
|---|---|
| 1.00 - 5.00 | ±0.050 |
| 5.01 - 8.00 | ±0.070 |
| 8.01 - 10.00 | ±0.100 |
| Thickness (mm) | Tolerance (mm) |
|---|---|
| 0.30 - 0.80 | ±0.013 |
| 0.81 - 1.00 | ±0.019 |
| 1.01 - 1.60 | ±0.025 |
| 1.61 - 2.30 | ±0.050 |
For shaped wire
| Width (mm) | Tolerance (mm) |
|---|---|
| 1.50 | ±0.020 |
| 1.51 - 3.00 | ±0.030 |
| 3.01 - 5.00 | ±0.040 |
| 5.01 - 7.00 | ±0.050 |
| 7.01 | ±0.060 |
Microstructure
Tempered martensite with no ferrite.
Execution
Rolled on 2 sides (flat).
Rolled on 4 sides (shaped).
Profile drawn (shaped).
Camber
Max. 4 mm measured on 1 m length.
Coil set
Max. 20 mm measured on 1 m length.
Surface
Bright or oxide.
Surface defects max. 1% of thickness.
E and G modulus of elasticity
206 kN/mm²
E and G modulus of shear
79.5 kN/mm²
Soft shot peening
Before the nitriding process a soft shot peening process shall be applied in order to remove the oxide layer on the spring wire surface.
Nitriding
GARBAFLEX CrSi91 should be nitrided to obtain optimum fatigue and relaxation properties. Our recommendation is gas nitriding.
Additional information
Decarburisation
No total decarburisation. Partial decarburisation (no continuous zones) max. 1.2% of a corresponding round wire dimension.