Offshore Structures
KOBELCO has plenty supply record to all types of offshore structures.
Table of contents
- Types of Offshore Structures / Operating Water Depth
- Jack-up Rig and Welding Materials
- 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%) - Welding Consumables for Duplex Stainless
- Welding Materials for 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
| Process | Product | Specification | Absorbed energy ／ vEtemp. ≧47J |
Remark |
|---|---|---|---|---|
| SMAW |
LB-88LT
|
AWS A5.5 E11016-G JIS Z3211 E7816-N5M4 L |
-60 ℃ | Polarity：AC |
|
LB-80L
|
AWS A5.5 E11018-G H4 | -40 ℃ | Polarity：DCEP | |
| SAW |
PF-H80AK /
US-80LT
|
AWS A5.23 F12A10-EG-G JIS Z3183 S804-H4 |
-40 ℃ | Polarity：AC |
|
PF-H80AS/
US-80LT
|
AWS A5.23 F11A10-EG-G | -40 ℃ | Polarity：DCEP | |
| GMAW |
DW-A80L
|
AWS A5.29 E111T1-GM-H4 EN ISO 18276 -A- T69 4 Z P M 2 H5 |
-40 ℃ | 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 ℃ | Shield gas:Ar-CO2 Flat / Horizontal |
|
|
MG-S88A
|
AWS A5.28 ER120S-G JIS Z3312 G78A 6 U M N7M4T |
-40 ℃ | Shielding Gas:Ar-CO2 | |
| GTAW |
TG-S80AM
|
AWS A5.28 ER110S-G JIS Z3316 W78 A 6 N6C1M4 |
-60 ℃ | Polarity：DCEP |
- *stands for FAMILIARC™,stands for TRUSTARC™,and stands for PREMIARC™.
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 | |
| 0.07 | 0.31 | 1.86 | 0.007 | 0.006 | 2.49 | 0.16 | 2.4 |
Typical Mechanical Test Results of Weld Joint
Welding parameter
- Position
vertical up
- Welding parameter
200A-24V
- Base metal
K-TEN780, 50 mmt
- Shielding gas
80% Ar-20%CO2
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) |
|||||
|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Ni | ||
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 |
- *stands for FAMILIARC™,stands for TRUSTARC™,and stands for PREMIARC™.
Typical Mechanical Test Results
TRUSTARC™ DW-A62LSR for 610MPa Class Steel
FCAW with Unsurpassed Notch Toughness in AW/SR condition
Application and Features
- 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
AWS A5.29 E91T1-GM
Typical Chemical Composition and Mechanical Properties of Deposited Metal
| Chemical Composition of Deposited Metal (%) | Diffusible Hydrogen (ml/100g) |
||||||
|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Ni | Others | |
| 0.05 | 0.14 | 1.29 | 0.007 | 0.008 | 2.59 | Mo, Ti, B | 3.9 |
Macrostructures (Example)
Welding parameter
- Welding Position
Vertical Upward
- Current-Voltage
220A-24V
- Base Metal
K-TEN610,60mm
- Shielding Gas
80%Ar-20%CO2
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
- 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
AWS A5.29 E91T1-GM
Typical Chemical Composition and Mechanical Properties of Deposited Metal
| Chemical Composition of Deposited Metal (%) | Diffusible Hydrogen (ml/100g) |
||||||
|---|---|---|---|---|---|---|---|
| C | Si | Mn | P | S | Ni | Others | |
| 0.05 | 0.16 | 1.39 | 0.007 | 0.004 | 0.92 | Cu, Mo, Ti, B | 3.3 |
Macrostructures (Example)
Welding parameter
- Welding Position
Vertical Upward
- Welding Conditions
200A-23V
- Base Metal
TEN610,60mm
- Shielding Gas
80%Ar-20%CO2
Welding Consumables for Duplex Stainless
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.
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 | × | × | ◎ | |
| UNS S32760 | × | × | ◎ | |||
- ◎: Applicable, with similar composition ○: 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 | |||||
| (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
Excellent Porosity-Resistance, Sound Weld-joint
High porosity-resistant and sound weld joint
Base metal: S31803 (20t)
Welding position: Horizontal (2G)
Base metal: S32760 (20t)
Welding position: Vertical-up (3G)
Base metal: S32304 (20t)
Welding position: Flat (1G)
Welding Materials for Offshore Structures
- *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%
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-A55ESR(SR) |
||||||
| -50 | DW-A55L MX-A55Ni1 MX-A55T |
DW-A55L MX-A55Ni1 MX-A55T |
DW-A81Ni1 |
DW-A61LSR |
MX-A80L |
||
| -60 | DW-A55L DW-A62LSR MX-A55Ni1 MX-A55T |
MX-A62L |
|||||
- *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 ( ℃) |
-20 | LB-52(SR) LB-52-18 |
LB-57 |
LB-62UL LB-62(SR) LB-62U(SR) |
LB-106 |
||
| -40 | LB-52U LB-7018-1 |
LB-55NS(SR) |
LB-67L(SR) LB-67LJ |
LB-70L |
|||
| -60 |
LB-52NSU(SR) |
– | |||||
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 ( ℃) |
-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) |
LB-52NSU(SR) |
LB-62L(SR) |
LB-Y75 |
LB-88LT |
||
| -60 | LB-52NSU(SR) |
||||||
- *TRUSTARC™ LB-52U, LB52NSU and TRUSTARC™ LB-62U: for Uranami welding
SAW: Submerged Arc Welding (DCEP)
| 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 ( ℃) |
-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 |
| -40 | ||||||
| -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 ( ℃) |
-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
| 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 ( ℃) |
-20 | TG-S50(SR) TG-S51T(SR) |
TG-S62(SR) |
TG-S80AM(SR) |
|||
| -30 | TG-S60A(SR) |
||||||
| -40 | TG-S1MT TG-S1N |
||||||
| -60 | |||||||
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