FL 851

Category 
type 
Agglomerated semi-basic low hydrogen SAW flux
applications 
Boiler works, spiral pipes, ship building, structural steel works, tanks and pressure vessels, piston cladding, offshore applications etc..
Properties 

Agglomerated semi-basic flux suitable for carbon alloy steel welding in single and multi-pass technique and in single or multi-wire applications. The weld deposit produced in combination with corresponding sub-arc wires meets outstanding mechanical properties and in particular high toughness at low temperature. Excellent slag removal in fillet and groove (semi-narrow gap) welds even in hot conditions. (Pre heat 250°C) This flux is specially developed to achieve very low content of diffusible hydrogen (< 4ml/100 g weld deposit)
 

Basicity:
Current:
Grain size:
1,7 (according to boniszewski
DC or AC, in single or multi-wires up to 1000 Ampere per wire
2.0-0.28mm (10-60 meshes).

 

classification
EN ISO 
14174: SA AB 1 67 AC H4
DIN 
760: SA AB 167 AC H4
Suitable for 

High-temperature resistant 15 NiCuMoNb5 1.6368 SEW 028 Fine grain structural steels 20 MnMoNi4-5 1.6311 DIN E 17201 11 NiMoV 53 1.6341 SEW 028 17 MnMoV 6-4 1.5403 Fine grain structural steels StE 355 1.0562 EN 10028-3 StE 550 1.8924 EN 10137-2 steels to API-standard X 42, X80 API-STANDARD

approvals 
CE approved
welding positions: 
Flux composition

Al2O3+MnO

TiO2+SiO2

CaO+MgO

CaF2

30

20

30

15

mechanical properties with FL 851

With

RP0,2

Rm

A5

Impact Energy (J) ISO-V

Wire Type

(N/mm2)

(N/mm2)

(%)

-20°C

-40°C

-51°C

-62°C

S2

>420

>510

>24

>120

>60

S2Si

>450

>520

>24

>160

>100

>60

S3Si

>470

>560

>23

>150

>80

>47

S3Si (PWHT)

>420

>520

>24

>140

>70

>47

S2Mo

>500

>590

>22

>90

>40

S2Mo (PWHT)

>470

>560

>22

>70

>30

S2Ni1

>440

>530

>25

>180

>110

>70

S2Ni1 (PWHT)

>400

>490

>26

>200

>120

>50

S3NiMo1

>590

>690

>22

>90

>60

S3NiMo1 (PWHT)

>570

>670

>22

>100

>50

SA CrMo1 (PWHT)

>400

>520

>22

>47

SA Corten

>470

>560

>22

>50

>27

PWHT time and temperature as required for the base metal and thickness.
redrying temperature 
At 300-350ºC for 2 hours to obtain diffusible hydrogen 4 ml/100 g. Max.
Standards for wire and flux combined

Classification acc. EN and AWS:

Wire type

EN 756 (rsg)en 1597-1, type 3

Two run EN 1597-1, type 4

AWS A 5.17 / A 5.23

S2(Si)

EN 756 - S 38 4 FB S2

EN 756 - S-3T 3 FB S2

F7 A6-EM 12 (K)

S3(Si)

EN 756 - S 42 4 FB S3

EN 756 - S 4T 3 FB S3

F8 A6-EH 12 K

S2Mo

EN 756 - S 46 3 FB S2Mo

EN 756 - S 4T 3 F8 S2Mo

F8 P4-EA2-A2

S2Ni1

EN 756 - S 42 6 FB S2Ni1

EN 756 - S 4T 3 FB S2Ni1

F7P8-ENi1-Ni1

S3NiMo1

EN 756 - S 50 3 FB S3Ni1Mo

EN 756 - S 5T 3 FB S3Ni1Mo

F9P4-EF3-F3

packing
15, 20, 25-30 Kg steel buckets / bags

Disclaimer: Whilst all reasonable efforts have been made to ensure the accuracy of the information contained, the information contained or otherwise referenced herein is presented only as “typical” without guarantee or warranty, and any liability incurred from any reliance thereon is expressively disclaimed. Typical data are those obtained when welded and tested in accordance to prescribed standards, and should not be assumed to be the expected results in a particular application or weldment. Other tests and procedures may produce different results. Users are cautioned to confirm by qualification testing, or other appropriate means, the suitability of any welding consumable and procedure before use in the intended application. The selection and use of specific products is solely within the control of, and remains the sole responsibility of the customer. The right to change design and/or specifications without notice is reserved.