STAVITRODE A 49

DESCRIPTION & APPLICATIONS :

This high-performance, air hardening electrode has a basic coating and deposits a C-Cr-Mn-Ni alloy for welding and surfacing steels. It joins similar alloys well, suits the resurfacing of valve seats and turbine components for steam and gas, and is equally good for joining straight chromium stainless steels.

The main use is overlaying the sealing faces of gas, water and steam valves, giving stainless, wear-resistant surfaces. It also serves to reclaim and repair castings, cylinders, hollow shafts, piping and a range of rolls.

Preheat to 200°C to 250°C ahead of welding, and hold the interpass temperature at 280°C and 350°C so the microstructure forms properly. To improve ductility, a PWHT of 2 hours at 750°C is advised.

UNIQUE FEATURES :

Air hardening deposit reaching 42 - 50 HRC.
MMA electrode of high Cr stainless type.
Current: AC or DC (+).
Storage: keep it dry and prevent condensation. If needed, re-dry for 1 hour at 300 - 350°C, up to a maximum of 3 times.

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Product details

KEY SPECIFICATIONS :

Alloying elements in iron based alloy	Hardness
C, Cr, Mn, Ni	42 - 50 HRC

RECOMMENDED WELDING CURRENT :

Dia. / Length (mm)	Amperage (A)
2.50 / 350	70 - 90
3.15 / 350 / 450	90 - 130
4.00 / 350 / 450	130 - 180
5.00 / 350 / 450	180 - 230

Frequently Asked Questions

What is STAVITRODE A 49 used for?

It surfaces the sealing faces of gas, water and steam valves, resurfaces valve seats and steam and gas turbine components, and reclaims castings, cylinders, hollow shafts, piping and rolls. It is also used to join straight chromium stainless steels.

How hard is the STAVITRODE A 49 deposit?

The deposit is a basic coated, air hardening C-Cr-Mn-Ni alloy with a typical hardness of 42 - 50 HRC.

What preheat and post-weld heat treatment does STAVITRODE A 49 require?

Preheat to 200 - 250°C before welding and keep the interpass temperature at 280 - 350°C for a better microstructure. PWHT at 750°C for 2 hours is recommended for improved ductility.

Which sizes and currents apply to STAVITRODE A 49?

2.50 mm at 70 - 90 A, 3.15 mm at 90 - 130 A, 4.00 mm at 130 - 180 A and 5.00 mm at 180 - 230 A. Store dry and re-dry at 300 - 350°C for 1 hour, up to a maximum of 3 times.