Cromaflux 300B

Flux for submerged arc welding

Classification

EN ISO 14174-A S A FB 2 DC H5

Description:

Cromaflux 300B is a high basicity, non-alloying agglomerated flux for submerged arc welding of austenitic, duplex and super-duplex stainless steels. Slag detachability is excellent, even in narrow joints

and with stabilised deposits, leaving a smooth, bright bead surface finish. Cromaflux 300B is designed for both butt and fillet welding and can be used on DC with up to 900A on a single wire. The high

basicity level of Cromaflux 300B gives minimal Cr burn-out losses and also produces a low content of

microslag inclusions, ensuring very good low temperature fracture toughness properties.

Approvals:

Cromasaw 308L, 316L;

Cromasaw 318, 347;

Cromasaw Duplex;

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

TÜV CL

TÜV

LR TÜV DNV CL

Product data:

Product code

9800-0001

Packaging

25kg plastic-lined paper bag

Typical all-weld metal chemical composition, wt.%:

Wire

Cromasaw 308L

Cromasaw 308H

Cromasaw 347

Cromasaw 316L

Cromasaw 317L

Cromasaw 318

Cromasaw 309L

Cromasaw 309MoL

Cromasaw 310

Cromasaw 312

Cromasaw Duplex

Cromasaw 2507

C

0.02

0.05

0.04

0.02

0.02

0.05

0.02

0.02

0.10

0.10

0.02

0.02

Si

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.6

0.4

0.7

0.7

0.5

Mn

1.4

1.4

1.0

1.4

1.4

1.4

1.4

1.4

1.4

1.4

1.2

0.5

Cr

19.5

19.5

19.1

18.3

19.5

18.6

23.0

21.5

25.3

29

22.5

24.6

Ni

10.0

10.0

9.3

11.3

14.3

12.3

13.3

14.2

21.0

9

9.0

9

Mo

Others

0.5 Nb

2.8

3.5

2.5

0.5Nb

2.8

3.2

3.9

0,13N

0.24N

FN *

7

4

8

8

6

4

10

12

0

60

48

49

* FN WRC-92

Typical all-weld metal mechanical properties:

Wire: Cromasaw

308L 308H 347 316L 317L 318

309L 309MoL 310 312 Duplex

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

35

34

38

30

38

26

Impact energy CV,J:

308L 308H 347 316L 317L 318

36

24

26

2507

309L 309MoL 310 312 Duplex

2507

100

110

95

-20°C

100

85

-40°C

95

75

75

60

+20°C 120

120

100 100

130

-60°C

-196°C 50

130

60

150 40

110

40

50

50

236

40

50