Rev.

00

S-777Q X M-12K
H-14
L-8
SUBMERGED ARC WELDING CONSUMABLES
FOR WELDING OF Mild & 490MPa CLASS
HIGH TENSILE STEEL

HYUNDAI WELDING CO., LTD.

 S-777Q

Flux JIS Z3352 EN ISO 14174 KS B ISO 14174

v Specification
S-777Q S A AR 1 S A AR 1 S A AR 1

Wire AWS A5.17 EN ISO 14171

M-12K F7A2-EM12K S2Si

H-14 F7A2-EH14 S4

L-8 F6AZ-EL8 S1

v Applications Butt, flat, beam welding of thin and medium thickness plates, Low
current, high travel speed welding for miniature LPG tanks, thin and
medium walled pipes and structure.
Combination with 1.6~2.4mm single or twin wire.

v Characteristics Aluminate-basic type agglomerated flux.

on Usage
Especially insensitive to oil, rust, scale, and dirt on the surface to be
welded. Slag detachability in narrow groove and resistance to porosity
are excellent.
Suitable for welding of thin and medium plate in high speed welding.

v Note on Usage 1. Dry the flux at 300~350℃(572~662℉) for 60minutes before use.

2. When the flux height is excessive, poor bead appearance may occur.

3. Remove rust, scales, oil, paint, water, dirt and slag of tack welds
from the groove to obtain sound weld metal.
 S-777Q

Welding Consumables for Test

v Flux

Chemical Composition, wt%

Consumable
Al2O3+MgO MnO+TiO2 Fe2O3+SiO2 CaF2+CaO

S-777Q 50 20 15 15

Particle Size H2O(1000℃)/

Consumable Type of Flux B.I
(Mesh) CO2(%)

S-777Q 10 x 48 Agglomerated 0.6 0.01/0.08

v Electrode

Dia. Chemical Composition, wt%

Consum
ables
mm (in) C Si Mn P S

M-12K 4.0(5/32) 0.09 0.20 1.02 0.016 0.006

AWS A5.17 EM12K 0.05-0.15 0.10-0.35 0.80-1.25 ≤0.030 ≤0.030

H-14 4.0(5/32) 0.12 0.03 1.93 0.016 0.009

AWS A5.17 EH14 0.10-0.20 ≤0.10 1.70-2.20 ≤0.030 ≤0.030

L-8 4.0(5/32) 0.05 0.02 0.52 0.017 0.012

AWS A5.17 EL8 ≤0.10 ≤0.07 0.25-0.60 ≤0.030 ≤0.030

This information is provided solely for the purpose of confirming product conformance with applicable standards. The serviceability of a product or
structure utilizing this type of information is and must be the sole responsibility of the builder/user. Many variables beyond the control of HYUNDAI
WELDING CO., LTD. affect the results obtained in applying this type of information. These variables include, but are not limited to, welding procedure,
shielding gas, plate chemistry and temperature, weldment design, fabrication methods and service requirements.
 S-777Q X M-12K

Mechanical Properties
& Chemical Composition of All Weld Metal

v Welding Conditions Method by AWS Spec.

30º
Base metal : SS400

Particle size : 10 x 48

Flux type : Agglomerated

Amp./ Volt./cpm : 550 / 30 / 40

25 (0.98)
Stick-Out mm (in) : 30 (1.18)

Pre-Heat ℃(℉) : R.T .

Interpass Temp. ℃ (℉) : <150 (302)

13 (0.51) Unit : mm (in)
Polarity : AC/DC+
[ Joint Preparation & Layer Details ]

v Mechanical Properties of All weld metal

CVN Impact Test

Tensile Test
J (ft∙lbs)
Consumables Polarity
YS TS EL -18℃ -29℃
MPa(ksi) MPa(ksi) (%) (0℉) (-20℉)

S-777Q AC 570 (83) 636 (92) 28 122 (90) 97 (72)

X M-12K DC+ 464 (67) 553 (80) 31 62 (46) 44 (27)

AWS A5.17
- ≥400 490~660 ≥ 22 ≥27J at –29℃
F7A2-EM12K

v Chemical Analysis of All weld metal(wt%)

Consumables Polarity C Si Mn P S

S-777Q AC 0.09 0.33 1.54 0.015 0.010

X M-12K DC+ 0.06 0.43 1.01 0.015 0.011

This information is provided solely for the purpose of confirming product conformance with applicable standards. The serviceability of a product or
structure utilizing this type of information is and must be the sole responsibility of the builder/user. Many variables beyond the control of HYUNDAI
WELDING CO., LTD. affect the results obtained in applying this type of information. These variables include, but are not limited to, welding procedure,
shielding gas, plate chemistry and temperature, weldment design, fabrication methods and service requirements.
 S-777Q X H-14

Mechanical Properties
& Chemical Composition of All Weld Metal

v Welding Conditions Method by AWS Spec.

30º
Base metal : SS400

Particle size : 10 x 48

Flux type : Agglomerated

Amp./ Volt./cpm : 550 / 30 / 40

25 (0.98)
Stick-Out mm (in) : 30 (1.18)

Pre-Heat ℃(℉) : R.T .

Interpass Temp. ℃ (℉) : <150 (302)

13 (0.51) Unit : mm (in)
Polarity : DC+
[ Joint Preparation & Layer Details ]

v Mechanical Properties of All weld metal

CVN Impact Test

Tensile Test
J (ft∙lbs)
Consumables Polarity
YS TS EL -18℃ -29℃
MPa(ksi) MPa(ksi) (%) (0℉) (-20℉)

S-777Q 511 587 91 68

DC+ 31.2
X H-14 (74.0) (85.1) (64) (49)

AWS A5.17
- ≥400 490~660 ≥ 22 ≥27J at –29℃
F7A2-EH14

v Chemical Analysis of All weld metal(wt%)

Consumables Polarity C Si Mn P S

S-777Q
DC+ 0.05 0.43 1.62 0.024 0.009
X H-14

This information is provided solely for the purpose of confirming product conformance with applicable standards. The serviceability of a product or
structure utilizing this type of information is and must be the sole responsibility of the builder/user. Many variables beyond the control of HYUNDAI
WELDING CO., LTD. affect the results obtained in applying this type of information. These variables include, but are not limited to, welding procedure,
shielding gas, plate chemistry and temperature, weldment design, fabrication methods and service requirements.
 S-777Q X L-8

Mechanical Properties
& Chemical Composition of All Weld Metal

v Welding Conditions Method by AWS Spec.

30º
Base metal : SS400

Particle size : 10 x 48

Flux type : Agglomerated

Amp./ Volt./cpm : 550 / 30 / 40

25 (0.98)
Stick-Out mm (in) : 30 (1.18)

Pre-Heat ℃(℉) : R.T .

Interpass Temp. ℃ (℉) : <150 (302)

13 (0.51) Unit : mm (in)
Polarity : DC+
[ Joint Preparation & Layer Details ]

v Mechanical Properties of All weld metal

CVN Impact Test

Tensile Test
J (ft∙lbs)
Consumables Polarity
YS TS EL 0℃
MPa(ksi) MPa(ksi) (%) (32℉)

S-777Q 434 508 82

DC+ 33.2
X L-8 (62.9) (73.7) (61)

AWS A5.17
- ≥330 410~550 ≥ 22 -
F6AZ-EL8

v Chemical Analysis of All weld metal(wt%)

Consumables Polarity C Si Mn P S

S-777Q
DC+ 0.05 0.28 0.68 0.018 0.014
X L-8

This information is provided solely for the purpose of confirming product conformance with applicable standards. The serviceability of a product or
structure utilizing this type of information is and must be the sole responsibility of the builder/user. Many variables beyond the control of HYUNDAI
WELDING CO., LTD. affect the results obtained in applying this type of information. These variables include, but are not limited to, welding procedure,
shielding gas, plate chemistry and temperature, weldment design, fabrication methods and service requirements.