Oil tempered spring wires according to EN 10270/2 FD/VD/TD
Quality: Oil tempered spring wires according to EN 10270/2 FDSiCr
Diameter: from mm 0.40 to 13.00 – Tolerances on the second wire diameter EN10270/2
Heat treatment:
– As soon as possible after coiling, the springs should be stress relieved as indicative parameter we recommend at T=420 ± 5°C Time 30 min (Indicative values)
– Shot peening.
– Shot peening of the inside of the spring coils is particularly critical. as indicative parameter we recommend at T=250 ± 10°C Time 30 min (Indicative values).
After shot peening, the springs should be hot preset or stress relieved. In order to reach optimal fatigue and relaxationproperties the springs must be preset at an appropriate stress.
Elastic Modulus: E= 206 GPa (Indicative value)
Shear Modulus: G= 79,5 GPa (Indicative value)
Chemical composition according to EN10270/2: (reference values)
| % C | % Mn | % Si | % P max | % S max | % Cu max | % Cr |
| 0.50 – 0.60 | 0.50 – 0.90 | 1.20 – 1.60 | 0.03 | 0.025 | 0.12 | 0.50-0.80 |
Packaging: coil and bars
Mechanical Properties
APPLICATIONS
- Springs for static application
- FD SiCr oil tempered spring wire is intended for the production of springs and other mechanical particulars exposed to medium and moderately fatigue stresses , medium temperature till 250°, ensure a good heat resistence and good relaxation characteristics.
REFERENCE STANDARDS
- EN 10270/2
TECHNICAL SHEET VD-SICR
Quality: Alloyed tempered spring wires according to EN 10270/2 VDSiCr
Diameter: Diameter from mm 0.40 to 13.00 – Tolerances according to EN 10270/2
Heat treatment:
– As soon as possible after coiling, the springs should bestress relieved as indicative parameter we recommend at T=240º ± 5°C Time 30 min (Indicative values).
– Shot peening.
– In order to obtain optimal 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; as indicative parameterwe recommend at T=250 ± 10°C Time 30 min (Indicative values)
After shot peening, the springs should be hot preset or stress relieved. In order to reach optimal fatigue and relaxation properties, the springs must be preset at an appropriate stress
Chemical composition according to EN10270/2: (reference values)
| % C | % Mn | % Si | % P max | % S max | % Cu max | % Cr |
| 0.50 – 0.60 | 0.50 – 0.90 | 1.20 – 1.60 | 0.025 | 0.020 | 0.06 | 0.50-0.80 |
Packaging: Coil and bars
Mechanical characteristics table
APPLICATIONS
- VD SiCr is alloyed tempered spring wire used for the production of springs and other mechanical particulars, exposed to high fatigue stresses as required for some valve springs or other springs with similar requirements.
REFERENCE STANDARDS
- EN 10270/2
TECHNICAL SHEET TD – SICR
Quality: Alloyed tempered spring wires according to EN 10270/2 TDSiCr
Diameter: from mm 0.40 to 13.00 – Tolerances according to EN 10270/2
Heat treatment:
– After winding, the springs must undergo a tempering: 380 ° / 425 ° for 30 minutes.
– Shot peening.
– Further treatment at 240° for 30′.
Chemical composition according to EN10270/2:
| % C | % Mn | % Si | % P max | % S max | % Cr | % Cu max |
| 0.50 – 0.60 | 0.50 – 0.90 | 1.20 – 1.60 | 0.025 | 0.020 | 0.50-0.80 | 0.10 |
Packaging: coil and bars
Mechanical characteristics table
APPLICATION
- TD SiCr is alloyed tempered spring wire intended for the production of springs and other mechanical particulars,exposed to medium and moderately high fatigue stresses as required for some clutch springs or transmission springs
REFERENCE STANDARDS
- EN 10270/2