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Composite SAW Wire

Lotherme HF-20

AWS: SFA

EN ISO CODE:

Composite submerged arc welding wires recommended with Lotherme SAF-704 flux for re-building of steel mill rolls.
LOTHERME HF-20 is a composite SAW wire of 1-2% Cr, 2-3% Ni, low carbon with controlled addition of Silicon & Molybdenum for buffer layer deposits. The weld metal has excellent bonding property, resistance to solidification cracking and is easily machinable.
LOTHERME SAF-704 is an agglomerated basic flux, shall be re-dried at 350°C before use.

Approvals

ALL-WELD METAL COMPOSITION (with LOTHERME SAF-704 FLUX):

Wire	C	Mn	Si	Cr	Ni	Mo	N
Lotherme HF-20	0.08 max	0.50-1.20	0.60 max	1.2-2.0	2.0-3.0	0.40-0.80	0.06-0.15

WELD METAL HARDNESS (after SR heat treatment at 400°C for 8 hrs):

LOTHERME HF-20 & LOTHERME SAF-704 flux, on 3-layer	23-28 HRC
1 layer LOTHERME HF-20, 2 layers LOTHERME HF-45 with LOTHERME SAF-704 flux	40-45 HRC
1 layer LOTHERME HF-20, 2 layers LOTHERME HF-55 with LOTHERME SAF-704 flux	50-54 HRC

WELDING CURRENT & STICK OUT (Polarity: DC +):

Wire diameter, mm	Current, Amp	Voltage, V	Linear travel speed, mm/min
3.2	350 – 450	28 – 30	400 – 500

PACKAGING:

Standard wire size is 3.2mm. The wire is supplied in a layer wound 25 kg metallic ring packed in a shrinkwrapped corrugated box. Wire is also available in 200/250kg card-board drum packing packed on a pallet. Flux is supplied in 25kg poly-lined bag.

Composite SAW Wire

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Composite SAW Wire

Lotherme HF-20

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