1

Your Best Welding Partner!

Hyundai Welding Co., Ltd.MENA Office

P.O. Box 61476Jebel Ali Freezone

Dubai, UAE

Hyundai Welding Research & Development CenterBaked Flux Cored Wire (SF-71) Evaluation

2

EvaluationIntroduction

MENA Office • R&D

SF-71 Flux Cored Wire

Non-Baked (NW) Baked (BW)

ADVANTAGES• Good Mechanical Performance

• Good Arc Start •Good Short Circuit Arc

• Good Fume Generation• Good Arc Resistance And Spatter Resistance

ADVANTAGES• Good High-Current Wire Transmission Characteristics

• Good Wire Rust Resistance• Good In Defects Resistance

• Good Tip Wear

•General Differences

•Process of Manufacturing

FORMINGWIRE

DRAWING WINDING

Baked (BW)

Non-Baked (NW)

Surface Appearance

FORMINGWIRE

DRAWING BAKING WINDING

This shows it is for SF-71 FC wire, are the things be same for SC-70H cored?

3

GeneralSpecification

MENA Office • R&D

4

GeneralSpecification

MENA Office • R&D

5

WeldabilityComparison

MENA Office • R&D

•Bead Apperance of T-Fillet Horizontal Fillet Welding (1 Pass)Baked (BW)

Non-Baked (NW)

Welding parameter:Gas Flow: Stick Out:Polarity:

280A/31V20L/min.20mmDC+

• Similar Workability• Both Types Display Good Arc Resistance• Both Types Display Slag Fluidity

Welding Conditions Conclusions

•Bead Apperance of Vertical Up Fillet Welding

190A/23V 230A/26V 270A/30V

Conclusions

• Similar Workability• Both Types Display Good Arc Resistance

• Both Types Display Slag Fluidity• The Heat Treated Type Showed Better Spreadability

of the Weld Metal

NW BW NW BW NW BW

6

MechanicalPerformance

MENA Office • R&D

Material:Specimen Geometry:Welding Condition:Welding Heat Input:Stack Method:

• Test Conditions20t / 300mm, DH3620˚ / Root Gap: 16mm230A / 30V10-20 (KJ/cm)6 Levels / 12 Passes

• Results Table

Class0˚C -20˚ C

YS (MPa) TS (MPa) EL (%) X1, X2, X3 Avg. X1, X2, X3 Avg.Non-Baked (NW) 557 617 28.5 94, 96, 101 97 56, 49, 51 52

Baked (BW) 530 580 27.5 65, 38, 78 75 37, 43, 33 38ABS 2Y ≥375 490-660 ≥22 ≥47J at 0˚C

Charpy V-Notch Impact Test (Avg. Joules)Tensile Test

20˚

20T

16mm

1 23 4

5 6

7 8

9 10

11 12

7

ChemicalComposition

MENA Office • R&D

• Chemical Composition of Deposit of All Weld Metal

• Diffusible Hydrogen Content of 100g Weld Metal

• Testing Method

Test Method: JIS Z3118 (Gas Chromography Method)Gas Flow: 100% CO2, 20l/min

Stick Out: 20mmParameters: 280A / 31V

Welding Speed: 25cm / minTemperature (˚C), Rh (%): 15˚ C, 50%

Holding Time: 72 HoursHydrogen Conten: ml / 100g

Diff

usib

le H

ydro

ge

n C

on

ten

t o

f 100

g W

eld

Me

tal (

ml/

100g

)C Si Mn P S

Non-Baked (NW) 0.050 0.57 1.27 0.013 0.006Baked (BW) 0.060 0.58 1.28 0.012 0.006

Chemical Composition (wt%)

Baked (BW) Flux Cored Wire Non-Baked (NW) Flux Cored Wire

0

1

2

3

4

5

6

55.5

Sales

8

FumeEmission

MENA Office • R&D

• Testing Method

Test Method: JIS Z3118 (Gas Chromography Method)Gas Flow: 100% CO2, 20l/min

Stick Out: 20mmParameters: 280A / 31V

Welding Speed: 25cm / minTemperature (˚C), Rh (%): 15˚ C, 50%

Holding Time: 72 HoursHydrogen Conten: ml / 100g

• Fume Emission

Fum

e E

miss

ion

(m

g/m

in)

• Test Method

FumeColletion

Fume FilterUnit

Auto WeldingCarriage

BakedNon-Baked

9

RootCracking

MENA Office • R&D

40˚

25T

8mm

500mm

300mm

A

A'

Research & Development Center

Testing Conditions

Welding Parameters

240A/28VRoot Gap

8mmGroove Angle

40˚Steel

DH36 (25T)

Result: Baked Flux Cored Wire (BW)

Result: Non-Baked Flux Cored Wire (NW)

Research & Development Center

200A 250A 300A

0123456789101112131415

NWBW

Prim

ary

La

yer C

rac

k Pe

rce

nta

ge

Primary Layer Crack Test

10

FeedabilityEvaluation

MENA Office • R&D

• Welding Condition

Welding condition: 330A/33VGas: 100% CO2Type: 6mm Cable Feeding Test

3W (3 Wave)

2W.1T (2 Wave / 1

Turn)

Constant Welding (20min)

Non-Baked (NW) A B+ B+Baked (BW) A A A

Feedability

Classification Wire TS (MPa)

11

RustEvaluation

MENA Office • R&D

Time Elapsed

0 HoursTemperature (Constant)

50˚ CelsiusHumidity (Constant)

80%Research & Development Center

Baked Flux Cored Wire (BW)

Time Elapsed

96 HoursTemperature (Constant)

50˚ CelsiusHumidity (Constant)

80%Research & Development Center

Baked Flux Cored Wire (BW)

Time Elapsed

0 HoursTemperature (Constant)

50˚ CelsiusHumidity (Constant)

80%Research & Development Center

Non-Baked Flux Cored Wire (NW)

Time Elapsed

96 HoursTemperature (Constant)

50˚ CelsiusHumidity (Constant)

80%Research & Development Center

Non-Baked Flux Cored Wire (NW)

12

AboutUs

MENA Office • R&D

Hyundai Welding is a world class manufacturer of welding consummables currently ranked in the top five internationally. Our manufacturing is done according to international standards including but not limite to EN, AWD and ASME. We currently manufacture in three countrie with more facilities in the planning stages around the world.

We have three research and development facilities to support our manufacturing and clients throughout the world.

Our product line is a diverse line with products tailor made for various industries. Please view our product catalog for detailed product information.

Started Production of Submerged Welding Wire

Started Production of Submerged Welding Flux

Company Renamed ‘Hyundai Welding Co., Ltd.

Started Manufacturing Welding & Cutting Equipment

Established Overseas Manufacturing Plant in Kunhan, China

Establised 2nd Overseas Manufacturing Facilities in Vietnam

Started 2nd Domestic Manufacturing Facility in Gochang, Korea

Established R&D Center in Sungnam, Korea

Established Branch Office in the United Arab Emirates

1975

1977

1978

1980

1987

1997

2002

2007

2009

2012

2013

Company Founded as ‘Seo Han Development Co., Ltd.’

Started Production of Electrodes & Solide Wire

13

Our MENA office was established in 2013, our office is located in the free trade zone of Jebel Ali in the Emirate of Dubai (“Jafza”). We believe this to be of strategic importance in order to have a local presense in the region to better serve our client’s needs and accumulate local know how. Our plans do not end with just an office but have plans to set up a logistics point in this area to easily distribute and provide after market services to the region without any major delays. Our office covers the following countries;.

MENAOffice

Morocco

Algeria Tunisia

Libya

Egypt

Sudan

Syria

LebanonIran

Oman

Yemen

Saudi Arabia

UAEQatar

Bahrain

Iraq

Kuwait

MENA Office • R&D

14

ManufacturingResearch

Phase 1: Middle East & North Africa

Phase 2: Africa

Phase 3: Central Asia

China Manufacturing CenterKunshan, ChinaCapacity: 5,300 metric tons/month

Ichon Manufacturing CenterIchon, KoreaWelding Machinery & Equipment

Pohang Manufacturing Center(1 & 2)Pohang, KoreaCapacity: 9,245 metric tons/month

Gochang Manufacturing CenterGochang, KoreaCapacity: 3,135 metric tons/month

Vietnam Manufacturing CenterVietnamCapacity: 3,186 metric tons/month

Pohang R&D CenterPohang, KoreaCentral Research

China R&D CenterKunshan, ChinaOverseas Research

Sungnam R&D CenterSungnam, KoreaHigh End Product Research

MENA Office • R&D

15

ContactUs

MENA OfficeP.O. Box 61476

Jebel Ali Freezone, Dubai, UAETelephone: +971 4 880 8354Facsimile: +971 4 880 8352

Emailtmk0524@hyundaiwelding.commkyoo@hyundaiwelding.com

MENA Office • Heat Treated Flux Cored Wire Evaluation