Description :

SF-33 is a basic agglomerated flux for the submerged arc welding of high-alloyed CrNiMo steel such as duplex stainless steel. While welded with SW-2209, SF-33 can provide great corrosion resistance and crack resistance and crack resistance. Good bead appearance, easy slag removal and excellent mechanical property can be obtained.

Applications :

It is applied in submerged arc welding with 22%Cr duplex stainless steels such as UNS S31803/ Alloy 2205.

Note On Usage:

1. Use of low heat input to get the corrosion resistability and mechanical properties on heat-affected zone.

2. Bake flux at 300-350C for 1hours before use.

3. Appropriate new flux is required to add with the recycling used flux for maintaining the welding quality.

Typical Chemical Composition Of Weld Metal (wt%) :

With SW-2209

Carbon (C)                   0.029

Manganese (Mn)           1.29

Silicon (Si)                    0.49

Nickel (Ni)                   8.94

Chronium (Cr)              22.04

Molybdenum (Mo)       2.85

Phoshorus (P)              0.026

Sulphur (S)                  0.010

Nitrogen (N)               0.14

Typical Mechanical Properties Of Weld Metal :

TS N/mm2                  815

EL%                           25.0

Suggested Welding Parameters:

Diameter (mm)	1.6	2.0	2.4	3.2	4.0
Parameters
Voltage (Volt)	26-28	26-29	26-30	27-31	27-32
Current (Amp)	250-350	300-400	350-500	400-550	450-600
W.F.S (cm/min)	110-280	110-240	100-205	80-150	60-115
Stick Out (mm)	13-19	13-19	19-32	25-38	25-38