X35 ST+

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 +

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.

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Material Outlet by Hempel

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