Rev. 04. Supercored 71H. FLUX CORED ARC WELDING CONSUMABLES FOR WELDING OF Mild & 490Mpa CLASS HIGH TENSILE STEEL HYUNDAI WELDING CO., LTD.

Transcription

1 Rev. 04 FLUX CORED ARC WELDING CONSUMABLES FOR WELDING OF Mild & 490Mpa CLASS HIGH TENSILE STEEL HYUNDAI WELDING CO., LTD.

2 v Specification (M E491T1-C1A4-CS1) (AWS A5.20 E71T-1C/ -9C/ -9C J) EN ISO A T 42 4 P C1 1H5 v Applications All position welding of shipbuilding, bridge, building and structural Fabrications. v Characteristics on Usage is a titania flux cored wire for all position welding with high amperage. Its impact value is very good under high heat input, arc is smooth and slag detachability is excellent. v Note on Usage 1. Proper preheating(50~150, 122~302 ) and interpass temperature must be used in order to release hydrogen which may cause cracking in weld metal when electrodes are used for medium and heavy plates 2. One-side welding defect such as hot cracking may occur with welding parameter such as high welding speed. 3. Use 100% CO 2 gas.

3 Mechanical Properties & Chemical Composition of All Weld Metal v Welding Conditions Method by AWS Rules Welding Position : 1G(PA) Diameter : 1.2mm (0.045in) Shielding Gas : 100%CO₂ Flow Rate : 20 l /min Amp./ Volt. : 280A / 32V Stick-Out : Pre-Heat : R.T. 20~25mm (0.79~0.98in) Interpass Temp. : 150±15 (302±59 ) [ Joint Preparation & Layer Details ] Polarity : DC(+) v Mechanical Properties of the weld metal Consumable Tensile Test CVN Impact Test J(ft lbs) YS Mpa (Ksi) TS Mpa (Ksi) EL (%) -30 (-22 ) -40 (-40 ) 550 (80) 570 (83) (66) 60 (44) 400 (58) 490~660 (70~95) 22 27J at 40 ( 20ft lbs at -40 ) v Chemical Analysis of the weld metal(wt%) Brand Name C Si Mn P S

4 Mechanical Properties & Chemical Composition of All Weld Metal v Welding Conditions Method by AWS Rules Welding Position : 1G(PA) Diameter : 1.4mm ( Shielding Gas : 100%CO₂ Flow Rate : 20 l /min Amp./ Volt. : 300A / 32V Stick-Out : 20~25mm (0.79~0.98in) Pre-Heat : R.T. Interpass Temp. : 150±15 (302±59 ) [ Joint Preparation & Layer Details ] Polarity : DC(+) v Mechanical Properties of the weld metal Consumable Tensile Test CVN Impact Test J(ft lbs) YS Mpa (Ksi) TS Mpa (Ksi) EL (%) -30 (-22 ) -40 (-40 ) 550 (80) 570 (83) (63) 60 (44) 400 (58) 490~660 (70~95) 22 27J at 40 ( 20ft lbs at -40 ) v Chemical Analysis of the weld metal(wt%) Brand Name C Si Mn P S

5 Welding Efficiency v Deposition Rate & Efficiency Consumable (size) Welding Conditions Amp.(A) Volt.(V) Wire Feed Speed m/min (in/min) Deposition Efficiency % Deposition Rate kg/hr(lb/hr) 1.2mm (0.045in) (400) 85~ (8.4) (450) 86~ (12.1) (600) 87~ (13.9) 1.4mm ( (300) 85~ (7.7) (400) 87~ (10.8) (500) 87~ (13.2) Remark Deposition efficiency =(Deposited metal weight/ Wire weight used) 100 Deposition rate =(Deposited metal weight/ Welding time,min.) 60 * Shielding Gas : 100%CO2

6 Diffusible Hydrogen Content v Welding Conditions Diameter : 1.4mm( Amps(A) / Volts(V) : 240A / 27V Shielding Gas : 100%CO 2 Flow Rate : 20 l /min Welding Position : 1G (PA) Stick-Out(mm) : Welding Speed : 20~25mm (0.79~0.98in) 30 cm/min (12 in/min) Current Type & Polarity : DC(+) v Hydrogen Analysis Using Gas Chromatograph Method Hydrogen Evolution Time : 72 hrs Evolution Temp. : 45 (113 ) Barometric Pressure : 780 mm-hg v Result( ml /100g Weld Metal) X1 X2 X3 X Average Hydrogen Content 3.4 ml / 100g Weld Metal

7 Proper Welding Condition v Proper Current Range Wire Dia. Consumables Shielding Gas Welding Position 1.2mm (0.045in) 1.4mm ( F & HF 120~300Amp 150~350Amp 180~400Amp Supercored 71H 100%CO2 V-Up & OH 120~260Amp 140~270Amp 160~280mp V-Down 200~300Amp 220~320Amp 250~300Amp

8 Approvals v Shipping Approvals Welding Position Register of shipping & Size KR ABS LR BV DNV GL NK All V-Down 4YSMG(C) H10 3YSMG(C) H10 4YSAH10 3SAH10 4YSH10 SA4YM HH SA3YM HH ⅣYSM H10 ⅢYMS H10 4YS H10 3YS H10 KSW54G(C) H10 KSW53G(C) H10 v F No & A No F No A No 6 1