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Description:
Cromaux 300B is a high basicity, non-alloying agglomerated ux for submerged arc welding of aus-
tenitic, duplex and super-duplex stainless steels. Slag detachability is excellent, even in narrow joints
and with stabilised deposits, leaving a smooth, bright bead surface nish. Cromaux 300B is desig-
ned for both butt and llet welding and can be used on DC with up to 900A on a single wire. The high
basicity level of Cromaux 300B gives minimal Cr burn-out losses and also produces a low content of
microslag inclusions, ensuring very good low temperature fracture toughness properties.
Flux type: Fluoride-basic
Basicity index: 2.3
Flux density: 1.0kg/dm3
Welding current: DC
Redrying temperature: 300-350°C, 2h
Grain size: EN 760 2-16
Approvals:
Cromasaw 308L, 316L; TÜV CL
Cromasaw 318, 347; TÜV
Cromasaw Duplex; LR TÜV DNV CL
Product data:
Product code Packaging
9800-0001 25kg plastic-lined paper bag
Cromaux 300B
Flux for submerged arc welding
Classication
EN ISO 14174-A S A FB 2 DC H5
Typical all-weld metal chemical composition, wt.%:
Wire C Si Mn Cr Ni Mo Others FN *
Cromasaw 308L 0.02 0.6 1.4 19.5 10.0 7
Cromasaw 308H 0.05 0.6 1.4 19.5 10.0 4
Cromasaw 347 0.04 0.6 1.0 19.1 9.3 0.5 Nb 8
Cromasaw 316L 0.02 0.6 1.4 18.3 11.3 2.8 8
Cromasaw 317L 0.02 0.6 1.4 19.5 14.3 3.5 6
Cromasaw 318 0.05 0.6 1.4 18.6 12.3 2.5 0.5Nb 4
Cromasaw 309L 0.02 0.6 1.4 23.0 13.3 10
Cromasaw 309MoL 0.02 0.6 1.4 21.5 14.2 2.8 12
Cromasaw 310 0.10 0.4 1.4 25.3 21.0 0
Cromasaw 312 0.10 0.7 1.4 29 9 60
Cromasaw Duplex 0.02 0.7 1.2 22.5 9.0 3.2 0,13N 48
Cromasaw 2507 0.02 0.5 0.5 24.6 9 3.9 0.24N 49
* FN WRC-92
Typical all-weld metal mechanical properties:
Wire: Cromasaw 308L 308H 347 316L 317L 318 309L 309MoL 310 312 Duplex 2507
Yield strength, Re, MPa 390 390 440 400 420 430 420 470 400 650 620 650
Tensile strength, Rm, MPa 550 550 620 580 590 600 580 660 600 800 780 840
Elongation A5, % 36 36 36 36 35 34 38 30 38 24 26 26
Impact energy CV,J: 308L 308H 347 316L 317L 318 309L 309MoL 310 312 Duplex 2507
+20°C 120 120 100 100 130 130 100 60 150 40 110 95
-20°C 100 85
-40°C 95 75
-60°C 110 75 60
-196°C 50 40 50 50 40 50