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OP 121TT W

SAW basic and semi-basic fluxes

OP 121TT W is a fully basic agglomerated submerged-arc welding flux that is recommended for applications requiring an extremely low concentration of phosphorus and sulphur in the weld metal, especially for high tensile steels and for joints requiring high toughness at sub-zero temperatures and resistance to ageing.
OP 121TTW can also be used for the welding of structural and fine grained low alloy steels requiring high integrity welds with low temperature impact and CTOD fracture toughness properties.

It meets the classifications:
   - FC 31HD => EN ISO 14171-A- S 42 6 FB T3
   - FC 31HD => AWS A5.17: F7A8-F7P8-EC1

OERLIKON expertise : OP 121TT W

The flux is widely used for the welding of thick section components in the offshore, nuclear and pressure vessel industries. The flux exhibits low hydrogen content in the as manufactured condition and gives a high resistance to moisture pick up during exposure under workshop conditions. The flux promotes a very stable arc characteristic during use with excellent slag detachment. The weld is of a uniform even profile with regular fine ripple formation and smooth toe blending. OP 121TT W flux is suitable for use with DC+ or AC and is ideal for single wire, twin wire, tandem arc [DC+/AC] and other multi-arc systems using up to 1000A with single wire welding. Grain size according to EN-ISO 14174: 2-20.

Available in standard bags (PE) and DRYBAG 25 kg.

 

OP 121TT W Chemical Analysis

  C MN SI MO
OE-S2 0.07 0.9 0.2 -
OE-S2 Mo 0.07 0.9 0.2 0.5
OE-SD3 0.07 1.6 0.3 -
OE-SD3 Mo 0.07 1.3 0.2 0.5

OP 121TT W Mechanical Properties

  Heat Treatment Yield Strength (MPa) Tensile Strength (MPa) Elongation A5 (%)                                  Impact Energy ISO - V (J)
          0°C   -20°C -40°C -60°C -80°C
OE-S2 As Welded ≥ 360 450-550 ≥ 28 ≥ 160 ≥ 100 ≥ 50 - -
OE-S2 Mo As Welded ≥ 470 550-680 ≥ 24 ≥ 120 ≥ 100 ≥ 50 - -
OE-SD3 As Welded ≥ 450 530-630 ≥ 25 ≥ 180  - ≥ 100 ≥ 70 -
OE-SD3 600°Cx2h ≥ 400 490-590 ≥ 27 ≥ 200 - ≥ 120 ≥ 90 -
OE-SD3 Mo As Welded ≥ 550 610-670 ≥ 29  -    - ≥ 110 ≥ 80 -
OE-SD3 Mo 620°Cx1h ≥ 520 600-660 ≥ 27  -   - ≥ 130 ≥ 60 -

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