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Quick guide for selection of welding consumables for creep resistant Cr-Mo
steels
Yield
strength
Steel grade Impact
energy
Cored wires - Elgacore Electrodes MAG TIG
Min. MPa Example Test temp. 136/138 111 135 141
550-690
General
principles
S550QL, S600QL1,
S650QL, S650MCD,
S690Q, S690QL1
Always use consumable in medium strength class for root pass in butt welds. Impact strength requirements should be fulfilled.
Fillet welds can usually be made using undermatching consumable.
EN-class T42-T46, AWS E70/E71-E80/E81. E.g. DWA 55L, MXA 100, P 62MR.
235-500 to
550-690
Use consumable that matches steel in the lowest strength class.
Need for preheat should always be evaluated for steels with yield strength ≥ 355 MPa. Preheat should be calculated according to EN 1011-2.
Quick guide for selection of welding consumables for unalloyed/low alloyed and
high strength steels, cont.
Electrodes MAG TIG
111 135 141
15Mo3, 16Mo3, A335 Grade P1 (0,5%-Mo-steel) P81CR Elgamatic 181CR Elgatig 181CR
13CrMo4-4, 13CrMo4-5, A335 Gr. P11, A335 Gr. P12 (1-1,25%Cr/0,5%Mo) P83CR Elgamatic 183CR Elgatig 183CR
Preheat and stress relief often specified. Follow fabrication specification.