Offshore Structures

Offshore structures

KOBELCO has plenty supply record to all types of offshore structures.

* Familiarc stands for FAMILIARC™, Trustarc stands for TRUSTARC™, and Premiarc stands for PREMIARC™.

Types of Offshore Structures / Operating Water Depth
Jack-up Rig and Welding Materials (780 Mpa Class)
TRUSTARC™ DW-55LSR/DW-A55LSR, FCAW with Unsurpassed Notch Toughness in AW/SR condition
Welding Consumables for Duplex Stainless
FCAW
SMAW
SAW
GTAW

Types of Offshore Structures / Operating Water Depth

offshore structure

Type of offshore structure-1

Type of offshore structure-2

Type of offshore structure-3

Type of offshore structure-4

Jack-up Rig and Welding Materials

Typical Welding Process

Welding Process of Jack-up Type RigESS

Welding Consumables for 780 MPa Class Steel

Process	Product	Specification	Absorbed energy / vEtemp. ≧47J	Remark
SMAW	LB-88LT	AWS A5.5 E11016-G JIS Z3211 E7816-N5M4 L	-60 °C	Polarity: AC
SMAW	LB-80L	AWS A5.5 E11018-G H4	-40 °C	Polarity: DCEP
SAW	PF-H80AK / US-80LT	AWS A5.23 F12A10-EG-G JIS Z3183 S804-H4	-40 °C	Polarity: AC
SAW	PF-H80AS/ US-80LT	AWS A5.23 F11A10-EG-G	-40 °C	Polarity: DCEP
GMAW	DW-A80L	AWS A5.29 E111T1-GM-H4 EN ISO 18276 -A- T69 4 Z P M 2 H5	-40 °C	Shield gas: Ar-CO₂ All position
	MX-A80L	AWS A5.29 E111T1-GM-H4 EN ISO 1876 -A- T69 6 Mn2.5ni M M3 H5	-60 °C	Shield gas: Ar-CO₂ Flat / Horizontal
	MG-S88A	AWS A5.28 ER120S-G JIS Z3312 G78A 6 U M N7M4T	-40 °C	Shielding Gas: Ar-CO₂
GTAW	TG-S80AM	AWS A5.28 ER110S-G JIS Z3316 W78 A 6 N6C1M4	-60 °C	Polarity: DCEP

FCAW: Flux-Cored Wire TRUSTARC™ DW-A80L

Rutile based flux-cored wire for Ar-CO₂ shielding gas, good usability in all positional welding.
Good notch toughness down to -40°C in as-welded condition.
Excellent crack resistance due to low diffusible hydrogen.
Applicable for 780 MPa class grade steel of offshore structure

AWS A5.29 E111T1-GM-H4
EN ISO 18276-A-T69 4 Z P M 2 H5
Shipping approvals: ABS, LR, DNV, GL and NK

Typical Test Result of Depositied Metal

Chemical Composition							Diffusible Hydrogen Content (ml/100g)
C	Si	Mn	P	S	Ni	Mo	Diffusible Hydrogen Content (ml/100g)
0.07	0.31	1.86	0.007	0.006	2.49	0.16	2.4

Typical Mechanical Test Results of Weld Joint

Macrostructures

Macro

Welding parameter
- Position: vertical up
- Welding parameter: 200A-24V
- Base metal: K-TEN780, 50 mmt
- Shielding gas: 80% Ar-20%CO₂

Impact test result

Charpy Impact Test Result

Tensile Test Result

	0.2% Y.S. (MPa)	T.S. (MPa)	Elongation (%)
1st	738	817	24
2st	736	811	23

TRUSTARC™ DW-55LSR/DW-A55LSR
FCAW with Unsurpassed Notch Toughness in AW/SR condition

Features

Revolutionary rutile-base flux-cored wires having unsurpassed notch toughness in SR condition as well as in the as-welded condition at low temperatures down to -60°C and excellent usability in all position welding.

Typical Test Result of Depositied Metal

Product	Chemical Composition						Diffusible Hydrogen Content (ml/100g)
Product	C	Si	Mn	P	S	Ni	Diffusible Hydrogen Content (ml/100g)
DW-55LSR	0.06	0.26	1.15	0.008	0.007	1.39	3.9
DW-A55LSR	0.05	0.33	1.32	0.009	0.008	0.90	3.9

Typical Mechanical Test Results

Tensile test results of TRUSTARC™ DW-A55LSR in the as-welded and SR conditions

Tensile test results of of TRUSTARC™ DW-A55LSR in the as-welded and SR conditions

Charpy impact test results of TRUSTARC™ DW-55LSR in the as-welded and SR conditions

TRUSTARC™ DW-A62LSR for 610MPa Class Steel
FCAW with Unsurpassed Notch Toughness in AW/SR condition

AWS A5.29 E91T1-GM

Application and Features

TRUSTARC

Application: Presssure vessels, spherical tank, and etc.
Less deterioration of notch toughness with SR
Excellent notch toughness at -60℃ with as-welded condition/-40℃ with SR
Excellent usability in all position welding

Typical Chemical Composition and Mechanical Properties of Deposited Metal

Chemical Composition of Deposited Metal（%）							Diffusible Hydrogen （ml/100 g）
C	Si	Mn	P	S	Ni	Others	Diffusible Hydrogen （ml/100 g）
0.05	0.14	1.29	0.007	0.008	2.59	Mo, Ti, B	3.9

Typical Chemical Composition and Mechanical Properties of Deposited Metal

Macrostructures (Example)

Macrostructures

TRUSTARC™ DW-A61LSR for 610MPa Class Steel
FCAW with Unsurpassed Notch Toughness in AW/SR condition & Satisfying NACE MR0175 (Ni < 1.0%)

AWS A5.29 E91T1-GM

Application and Features

TRUSTARC

Application: Presssure vessels, spherical tank, and etc.
Low Ni content (<1.0%) satisfying NACE MR0175 & ISO 15156
Excellent notch toughness at -50℃ with as-welded condition/-40℃ with SR
Excellent usability in all position welding

Typical Chemical Composition and Mechanical Properties of Deposited Metal

Chemical Composition of Deposited Metal（%）							Diffusible Hydrogen （ml/100 g）
C	Si	Mn	P	S	Ni	Others	Diffusible Hydrogen （ml/100 g）
0.05	0.16	1.39	0.007	0.004	0.92	Cu, Mo, Ti, B	3.3

Typical Chemical Composition and Mechanical Properties of Deposited Metal

Macrostructures (Example)

Macrostructures

Welding Consumables for Duplex Stainless

KOBELCO WELDING TODAY SPECIAL EDITION STAINLESS STEEL

Kobelco Welding Today Special Editions Stainless Steel

What is Duplex Stainless ?

- With microstructure consisting virtually 50% austenite phase and 50% ferritic phase, duplex stainless possesses

excellent ductility, notch toughness, and resistance to stress corrosion cracking
-is classified into standard, lean, and super duplex.

Duplex Stainless Steel

Chemical Distribution

Class of Duplex Stainless Steel and Applicable Welding Material

Class	Feature	Welding Material / Grade	Welding Process	Trade Designation
			FCAW	DW-2307	DW-2209/ DW-329AP	DW-2594
			SMAW	—	NC-2209	NC-2594
			GTAW	—	TG-S2209	TG-S2594
Lean Duplex	Less Ni, Mo content than standard duplex. substitute for SUS304 (L) and SUS316 (L)	UNS-S32101		◎	○	○
		UNS-S32304		◎	○	○
		UNS S82122		◎	○	○
Standard Duplex	Most common duplex, applicable for wide range of industries	UNS S31803		×	◎	○
		UNS S32205		×	◎	○
		SUS329J3L		×	◎	○
		SUS329J4L		×	×	○
Super Duplex	With PRE=Cr+3.3Mo+16N≧40, most excellent corrosion resistance	UNS S32750		×	×	◎
Super Duplex		UNS S32760		×	×	◎

◎: Applicable, with similar composition 〇: Applicable ×: Not-applicable

Our Product Line-up

Class	Trade Designation	Process	AWS	Typical Chemical Composition(mass.%)							PRE^*	Typical Mechanical Properties
				C	Si	Mn	Ni	Cr	Mo	N		0.2% PS	TS	EI	vE
				C	Si	Mn	Ni	Cr	Mo	N		(MPa)	(MPa)	(%)	(0°ree;C, J)
Lean Duplex	DW-2307	FCAW	A5.22/A5.22M E2307T1-1/4	0.026	0.45	1.26	7.9	24.6	0.03	0.15	27.1	571	750	29	58
Standard Duplex	TG-S2209	GTAW	A5.9/A5.9M ER2209	0.008	0.39	1.67	8.7	22.7	3.10	0.16	35.5	598	773	39	270
	NC-2209	SMAW	A5.4/A5.4M E2209-16	0.028	0.54	1.14	8.8	23.1	3.34	0.15	36.5	667	845	30	97
	DW-2209	FCAW	A5.22/A5.22M E2209T1-1/4	0.028	0.61	0.74	9.1	22.7	3.30	0.13	35.6	639	820	28	73
	DW-329AP	FCAW	A5.22/A5.22M E2209T1-1/4	0.024	0.63	0.80	9.2	23.0	3.49	0.13	36.6	643	832	28	55
	US-2209/ PF-S1D	SAW	A5.9/A5.9M ER2209 (Wire)	0.021	0.31	1.56	8.9	23.0	3.28	0.15	35.9	618	798	29	69
Super Duplex	TG-S2594	GTAW	A5.9/A5.9M ER2594	0.019	0.44	0.57	9.3	25.0	3.82	0.28	42.0	721	870	31	286
	NC-2594	SMAW	A5.4/A5.4M E2594-16	0.035	0.55	0.66	9.8	26.6	3.86	0.25	43.3	750	935	28	55
	DW-2594	FCAW	A5.22/A5.22M E2594T1-1/4	0.026	0.50	1.18	9.6	25.7	3.79	0.24	42.0	712	905	27	55

* PRE = Cr + 3.3Mo +16N, mass%

Excellent Corrosion Resistance / Strength

Microstructure of Weld Metal

PRE and Pitting Corrosion Property

PRE and Pitting Corrosion Resistance

Tensile Property

Tensile Property

Excellent Porosity-Resistance, Sound Weld-joint

High porosity-resistant and sound weld joint

PREMIARC DW-2209

Wire: PREMIARC™DW-2209
Base metal: S31803 (20t)
Welding position: Horizontal (2G)

PREMIARC DW-2594

Wire: PREMIARC™DW-2594
Base metal: S32760 (20t)
Welding position: Vertical-up (3G)

PREMIARC DW-2307

Wire: PREMIARC™DW-2307
Base metal: S32304 (20t)
Welding position: Flat (1G)

Welding Materials for Offshore Structures

Note: Use polarity as indicated. Products with "SR" can be used in PWHT condition and As-welded condition, otherwise in As-welded only.

FCAW: Flux-Cored Wire (CO₂ 100%)

KWT Special Edition Low Temperature Steel

TS (MPa) min.		490	520	550	610
YS (MPa) min.		350	400	420	500
IV (J) min.		35	40	42	50
Service temperature ( °C)	-20	DW-50	DW-55L		DW-62L
	-40	DW-55E	DW-55L
	-50	DW-50LSR (SR)	DW-55LSR (SR)	DW-55LSR
	-60	DW-A55L	DW-55LSR (SR)	DW-55LSR

FCAW: Flux-Cored Wire (Ar + 20% CO₂)

TS (MPa) min.		490	520	550	610	670	700
PS (MPa) min.		350	400	420	500	550	690
vE (J) min.		35	40	42	50	55	69
Service temperature ( ℃)	-20	DW-A50	DW-A81Ni1 DW-A62LSR(SR)		DW-A61LSR(SR) DW-A65L DW-A65Ni1	DW-A70L	DW-A80L
	-40	DW-A55E DW-A55ESR(SR)	DW-A81Ni1 DW-A62LSR(SR)		DW-A61LSR(SR) DW-A65L DW-A65Ni1	DW-A70L	DW-A80L
	-50	DW-A55L MX-A55Ni1 MX-A55T	DW-A55L DW-55LSR(SR) MX-A55Ni1 MX-A55T	DW-A81Ni1	DW-A61LSR	MX-A80L
	-60	DW-A55L MX-A55Ni1 MX-A55T	DW-A55L DW-55LSR(SR) MX-A55Ni1 MX-A55T	DW-A55L DW-55LSR(SR) DW-A62LSR MX-A55Ni1 MX-A55T	DW-62L DW-A62LSR MX-A62L	MX-A80L

MG: Solid wire

MX: Metal-cored wire

SMAW: Stick Electrode (DC)

TS (MPa) min.		490	520	550	610	670	770
YS (MPa) min.		350	400	420	500	550	690
IV (J) min.		35	40	42	50	55	69
Service temperature ( °C)	-20	LB-52(SR) LB-52-18	LB-57	LB-62UL LB-62(SR) LB-62U(SR)		LB-106	LB-80L
	-40	LB-52U LB-7018-1	NB-1SJ(SR)	LB-62L(SR) LB-55NS(SR)	LB-65L(SR) LB-67L(SR) LB-67LJ	LB-70L
	-60	NB-1SJ(SR) LB-52NS(SR) LB-52NSU(SR)	NB-1SJ(SR)	LB-62L(SR) LB-55NS(SR)	LB-65L(SR) LB-67L(SR) LB-67LJ	–

SMAW: Stick Electrode (AC)

TS (MPa) min.		490	520	550	610	670	770
YS (MPa) min.		350	400	420	500	550	690
IV (J) min.		35	40	42	50	55	69
Service temperature ( °C)	-20	LB-52(SR) LB-52-18	LB-57(SR)	LB-62UL LB-62(SR) LB-62U(SR)		LB-106	LB-80UL LB-116
	-40	LB-52U(SR)	NB-1SJ(SR) LB-52NS LB-52NSU(SR)	NB-1SJ(SR) LB-62L(SR)	LB-62L(SR)	LB-Y75	LB-88LT
	-60	NB-1SJ(SR) LB-52NS(SR) LB-52NSU(SR)	NB-1SJ(SR) LB-52NS LB-52NSU(SR)	NB-1SJ(SR) LB-62L(SR)	LB-62L(SR)	LB-Y75	LB-88LT

*TRUSTARC™ LB-52U, LB52NSU and TRUSTARC™ LB-62U: for Uranami welding

SAW: Submerged Arc Welding (DCEP)

	-40			PF-H80AK / US-56B	PF-H80AS / US-255
TS (MPa) min.		490	520	610	670	770
YS (MPa) min.		350	400	500	550	690
IV (J) min.		35	40	50	55	69
Service temperature ( °C)	-20	PF-H55AS / US-36J(SR)	PF-H55AS / US-36J PF-H58AS / US-36J	PF-H80AK / US-56B	PF-H80AS / US-255	PF-H80AS / US-80LT
	-60			PF-H62AS / US-2N	–

SAW: Submerged Arc Welding (AC)

TS (MPa) min.		490	520	550	610	670	770
YS (MPa) min.		350	400	420	500	550	690
IV (J) min.		35	40	42	50	55	69
Service temperature ( °C)	-20	PF-H55LT / US-36(SR)	MF-38 / US-49A(SR)		MF-38 / US-40	PF-H80AK / US-255	PF-H80AK / US-80LT
	-40		PF-H55S / US-49A(SR)		PF-H55S / US-40 PF-H80AK / US-56B
	-60		PF-H55LT / US-36 PF-H55LT / US-36J(SR)	PF-H55LT / US-36J	PF-H80AK / US-56B PF-H55S / US-2N(SR)

MF-38: Fused type flux

TRUSTARC™ PF-H: Bonded type flux

GTAW: TIG

	-60	TG-S1MT TG-S1N
TS (MPa) min.		490	520	550	610	670	770
YS (MPa) min.		350	400	420	500	550	690
IV (J) min.		35	40	42	50	55	69
Service temperature ( °C)	-20	TG-S50(SR) TG-S51T(SR)	TG-S62(SR)			TG-S80AM(SR)
	-30	TG-S50(SR) TG-S51T(SR)	TG-S60A(SR)
	-40	TG-S1MT TG-S1N

Industries

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Offshore Structures

Types of Offshore Structures / Operating Water Depth

Jack-up Rig and Welding Materials

Typical Welding Process

Welding Consumables for 780 MPa Class Steel

FCAW: Flux-Cored Wire TRUSTARC™ DW-A80L

Typical Test Result of Depositied Metal

Typical Mechanical Test Results of Weld Joint

Tensile Test Result

TRUSTARC™ DW-55LSR/DW-A55LSR FCAW with Unsurpassed Notch Toughness in AW/SR condition

Features

Typical Test Result of Depositied Metal

Typical Mechanical Test Results

TRUSTARC™ DW-A62LSR for 610MPa Class Steel FCAW with Unsurpassed Notch Toughness in AW/SR condition

Application and Features

Typical Chemical Composition and Mechanical Properties of Deposited Metal

Macrostructures (Example)

TRUSTARC™ DW-A61LSR for 610MPa Class Steel FCAW with Unsurpassed Notch Toughness in AW/SR condition & Satisfying NACE MR0175 (Ni < 1.0%)

Application and Features

Typical Chemical Composition and Mechanical Properties of Deposited Metal

Macrostructures (Example)

Welding Consumables for Duplex Stainless

What is Duplex Stainless ?

Class of Duplex Stainless Steel and Applicable Welding Material

Our Product Line-up

Excellent Corrosion Resistance / Strength

Excellent Porosity-Resistance, Sound Weld-joint

Welding Materials for Offshore Structures

FCAW: Flux-Cored Wire (CO2 100%)

FCAW: Flux-Cored Wire (Ar + 20% CO2)

SMAW: Stick Electrode (DC)

SMAW: Stick Electrode (AC)

SAW: Submerged Arc Welding (DCEP)

SAW: Submerged Arc Welding (AC)

GTAW: TIG

Industries

TRUSTARC™ DW-55LSR/DW-A55LSR
FCAW with Unsurpassed Notch Toughness in AW/SR condition

TRUSTARC™ DW-A62LSR for 610MPa Class Steel
FCAW with Unsurpassed Notch Toughness in AW/SR condition

TRUSTARC™ DW-A61LSR for 610MPa Class Steel
FCAW with Unsurpassed Notch Toughness in AW/SR condition & Satisfying NACE MR0175 (Ni < 1.0%)

FCAW: Flux-Cored Wire (CO₂ 100%)

FCAW: Flux-Cored Wire (Ar + 20% CO₂)