B?HLER FOX C 9 MV伯樂焊條

Description
Basic coated core wire alloyed electrode suited for high temperature martensitic 9-12 % chromium
steels, especially for T 91 and P91 steels and operating temperatures up to +620 °C (approved up to
+650 °C). High creep rupture strength and good toughness properties under long term stresses. Low
hydrogen content. The electrode is suitable in all positions except vertical down. It features excellent
striking and re-striking properties.
Approvals and Certificates
TüV-D (6762.), CL (1267), UDT, SEPROZ
Same Alloy Filler metals
GTAW rod: C 9 MV-IG GMAW solid wire: C 9 MV-IG
GMAW wire:  C 9 MV-IG GMAW metal cored wire: C 9 MV-MC
SAW combination: C 9 MV-UP/BB 910
base Materials
similar alloyed creep resistant steels
1.4903 X10CrMoVNb9-1
ASTM A199 Gr. T91; A335 Gr. P91 (T91); A213/213M Gr. T91
Operating Data
re-drying if necessary: ? mm L mm amps A
300 - 350 °C, min. 2 h 2.5 250 60 - 180
electrode identification: 3.2 350 90 - 120
FOX C 9 MV 9015-B9 E CrMo91 B 4.0 350 110 - 140
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. A cooling down to room temperature is possible up to a
wall thickness of 45 mm. 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
(*) a1
yield strength R e N/mm 2 :  500 (≥ 415)
tensile strength R m N/mm 2 :  720 (≥ 585)
elongation A (L 0 = 5d 0 ) %:  19 (≥ 317)
impact work ISO-V KV J + 20 °C: 60 (≥ 341)
(*)  a1 annealed, 760 °C/2 h/furnace down to 300 °C/air
Typical Composition of All-weld metal
C Si Mn Cr Ni Mo Nb V
wt-% 0.09 0.3 0.5 9.0 0.9 0.9 0.05 0.2