B?HLER C 9 MV-IG伯樂焊絲

Description
GTAW rod for high temperature, creep resistant martensitic 9-12 % chromium steels. Especially
designed for the ASTM steels T91/P91. Approved in long-term condition up to +650 °C service
temperature.
Approvals and Certificates
TüV-D (07106.), CL (1225), UDT
Same Alloy Filler metals
SMAW stick electrode: FOX C 9 MV
GMAW solid 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; A213/213M Gr. T91
Operating Data
shielding gas: 100 % Argon ? mm
2.0
rod marking:  2.4
front: WCrMo91 3.0
back: ER 90S-B9
Preheating and interpass temperature 200-300 °C. After welding, the weld joint should cool 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 recom-
mended: annealing 760 °C/min. 2 hrs, max. 10 hrs, heating and cooling rates below 550 °C max.
150 °C/hr, above 550 °C max. 80 °C/hr. For optimised toughness values a welding technology should
be applied which produces thin welding layers (approx. 2 mm).
Mechanical Properties of All-weld metal
(*) a
yield strength R e N/mm 2 :  660 (≥ 520)
tensile strength R m N/mm 2 :  760 (≥ 620)
elongation A (L 0 = 5d 0 ) %:  17 (≥ 316)
impact work ISO-V KV J + 20 °C: 55 (≥ 350)
(*)  a annealed, 760 °C/2 h/furnace down to 300 °C/air – shielding gas Argon
Typical Composition of Welding Rod
C Si Mn Cr Ni Mo V Nb
wt-% 0.12 0.3 0.5 9.0 0.7 0.9 0.2 0.055