1261 N

 

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DIN 8575                               E Mo B 20+

PrEN 1599                        E Mo B 42 H10

AWS/ASME SFA-5.5        E 7018 - A 1-H8

 

Application / Properties: Electrode for welding of creep resistant and high-pressure hydrogen resistant steels used in the construction of pressure vessels, boilers and piping subjected to operating temperatures up to+550C.Owing to its double covering (up to 3.25mmǾ), the electrode shows a stable and concentrate arc, thus being well suited for root pass and positional welding . weld are of X-ray quality.

Preheating, inter-pass temperature and post-weld heat treatment in accordance with base metal to be welded.

Weld metal analysis in % (typical values):

C	Mn	Si	Mo
0.06	0.80	0.50	0.50

 

Mechanical Properties of all-weld metal :

(single values are typical values)

 

	Yield Strength (N/mm2)	Tensile Strength (N/mm2)	Elongation A5(%)	ISO-V Impact energy (j) +200C
T	>470	520-650	>22	160

 

 T : tempered 1 h at 620C,air cooling

Amperage:
2.5Ǿ	3.25 Ǿ	4.0Ǿ	5.0Ǿ
65-90	90-130	140-180	190-230

Materials:

Creep resistant boiler and pip steels  e.g St 35.8, St 45.8, 17 Mn4 19 Mn 5, 15 Mo 3, 16 Mo 5 Fine grain structural steels StE, WStE 255 to 460 Pipe steels StE 360.7, to StE 415.7 Steels to API standars X52 to X60 Cast steels GS-C 25, GS-22 Mo 4

 

 

Redrying : required at 300°C to 350°C for 2hrs.