BÖHLER FOX C 9 MVW伯乐焊条

BÖHLER FOX C 9 MVW伯乐焊条

Description
Basic coated core wire alloyed Cr-Mo-Ni-V-W-Nb-electrode for the welding of high temperatu-
re martensitic steels like e.g. X11CrMoWVNb9-1-1 (P911/T911). Approved in long-term
condition up to +650 °C service temperature. Good welding properties in all positions except
vertical down.
Approvals and Certificates
TÜV-D (9176.), UDT, SEPROZ
Same Alloy Filler metals
GTAW rod: C 9 MVW-IG
SAW combination: C 9 MVW-UP/BB 910
base Materials
similar alloyed creep resistant steels
1.4905 X11CrMoWVNb9-1-1
ASTM A335 Gr. P911; A213 Gr. T911
Operating Data
re-drying if necessary: ø mm L mm amps A
300 - 350 °C, min. 2 h 3.2 350 90 - 120
electrode identification: 4.0 350 110 - 140
FOX C 9 MVW E Z CrMoWVNb 9 1 1 B 5.0 450 150 - 180
Preheating and interpass temperature 200-300 °C. After welding the joint should be cooled
down below 80 °C to finish the martensite transformation. In case of greater wall thickness or
complex components the possibility of residual stresses must be considered.
The following post weld heat treatment is recommended: annealing 760 °C/ min. 2 hrs, max.
10 hrs, heating and cooling rates up to 550 °C max. 150 °C/h, above 550 °C max. 80 °C/h.
For optimised toughness values a welding technology should be applied which produces thin
welding layers (app. 2 mm).
Mechanical Properties of All-weld metal
(*) a
yield strength R e N/mm 2 :  560 (≥ 530)
tensile strength R m N/mm 2 :  720 (≥ 700)
elongation A (L 0 = 5d 0 ) %:  015 (≥ 315)
impact work ISO-V KV J + 20 °C: 040 (≥ 327)
(*)  a annealed, 760 °C/2 h/furnace down to 300 °C/air
Typical Composition of All-weld metal
C Si Mn Cr Mo Ni W V N Nb
wt-% 0.1 0.25 0.7 8.5 1.0 0.7 1.0 0.2 0.05 0.05