X35 ST +
Business Unit Manager Medical, Aerospace, Industry
100% martensitic stainless steel, the X35 ST+ is developed for the manufacture of watch movement components. It offers excellent skills for bar turning, cutting, polishing and rolling. The X35 ST+ can replace traditional stainless steel as well as leaded and lead-free steels, and will also offer very good corrosion resistance.
Main fields of application of X35 ST +
Many diverse and varied components are now prescribed in X35 ST+ by watch manufacturers: screws, screw feet, studs, winding rods, nucleus, ratchet, barrel shaft, second pinion, balance pin, pins, various other pinions and pins.
Chemical composition of X35 ST +
| Element | % |
|---|---|
| C | 0.50 max |
| S | 0.15 min |
| Mn | 1.50 max |
| Cr | 12 - 14 |
| P | 0.06 max |
| Mo | 0.60 max |
Mechanical properties of X35 ST +
| before heat treatment | after heat treatment |
|---|---|
| Hardness: approx. 220 HV | Hardness: 670 -700 HV (58-60) HRC |
| Rm: approx. 820 N/mm² | Possible: 550-580 HV (with adapted Rp0.2: approx. 740 N/mm², tempering temperature) |
Delivery program
Round bars drawned < ø 2.00 mm h6
Round bars grounded ø 2.00 mm - 8.00 mm h6
Round bars grounded ø 10.00 mm - 20.00 mm h8
Bars Lg = 3000 - 3050 mm
Further sizes available upon request.
