KOBELCO WELDING CONSUMABLES

1 TODAYTODAYKOBELCO WELDING CONSUMABLESKOBELCO WELDING CONSUMABLESFORFOR 2nd Special Editionnd Special Edition MILD STEEL AND 490 MPa HT STEELMILD STEEL AND 490 MPa HT STEELMILD STEEL AND 490 MPa HT STEELMILD STEEL AND 490 MPa HT STEEL KOBELCO WELDING TODAY1 PRODUCTS SPOTLIGHTA Quick Guide to Suitable WELDING Consumablesfor Mild Steel and 490 MPa high Tensile Strength Steel For Shielded Metal Arc WELDING (SMAW)Tips for successful WELDING results1. This guidance is to help users select appropriate WELDING CONSUMABLES .

2 Users are requested to confirm whether the selectedbrand can satisfy the job requirements before use. 2. Suitable electric polarity for SMAW electrodes are as follows: AC, DCEN or DCEP for EXX13, EXX19, and EXX24; AC orDCEP for EXX16, EXX18 and EXX48; DCEP for EXX10. Wires for FCAW and GMAW use DCEP (DW-A51B uses DCEN). ForSAW flux-wire combinations, AC is recommended. Electric polarity can affect the usability of WELDING CONSUMABLES and thechemical composition and mechanical properties of weld metals; therefore, it is recommended to confirm the performance ofthe consumable you selected, using the polarity of a power source available for a particular job.

3 3. The trade designations with a prefix of G or MF are fused-type fluxes for SAW, whereas those that begin with PF are bonded-type fluxes. The trade designations shown with a prefix of DW or MX are flux-cored wires, whereas those denoted with a prefixof MG or MIX are solid wires. Shielding gas composition can affect the usability of a wire, the chemical composition andmechanical properties of the weld The mechanical properties of weld metals can be affected by preheat and interpass temperatures and WELDING heat , these parameters must be controlled during WELDING to assure the weld quality.

4 5. For details of individual brands, refer to KOBELCO WELDING name*11.[F] designates FAMILIARC . [T] designates TRUSTARC .AWS classificationFeaturesThin to medium plate joints[F] E6013 Capable of vertical downward WELDING .[F] E6013 Lower fume emissions.[F] E6013 Better bead appearance.[F] E6019 Deeper penetration than E6013.[F] E6019 Better X-ray soundness.[F] E6019 Higher resistance to hot plate joints[F] E7016 For mild steel. Higher deposition rates.[F] E7016 For mild steel. Better X-ray soundness.[F] E7016 Typical electrode for 490 MPa HT steel.

5 [F] E7016 Extra-low hydrogen. Harmless fumes.[F] E7016 Extra-low hydrogen. HIgher resistance to cold cracking.[F] E7016 Ultra-low hydrogen. Moisture resistant.[F] E7016 Suitable for 520 MPa HT steel. Extra-low hydrogen.[F] E7016-GSuitable for 520 MPa HT steel.[F] E7016 Suitable for HIC resistant steel.[F] E7018 Higher deposition rates. Better usability with DCEP.[T] E7018-1 Higher deposition rates. Excellent low-temp notch and flat fillets[F] E7018 Typical electrode for 490 MPa HT steel.[F] E7024 Suitable for manual and gravity WELDING .[F] LT-B50-Non-low hydrogen.

6 Not suitable for thick [F] E6010 Suitable for API grades of up to X52.[F] E7010-P1 Suitable for API grades of X52-X60.[F] E8010-P1 Suitable for API grades of X60-X70.[F] E7048 Extra-low hydrogen. Vertical downward WELDING .[F] E8018-GExtra-low hydrogen. Vertical downward WELDING .[F] E9018-GExtra-low hydrogen. Vertical downward passes[F] E7016 Unsurpassed penetration bead k i n g[F] E7048 Excellent re-arcing with a low hydrogen coating. KOBELCO WELDING TODAY2 PRODUCTS SPOTLIGHT For Flux Cored Arc WELDING (FCAW) For Gas Metal Arc WELDING (GMAW) For Gas Tungsten Arc WELDING (GTAW) For Submerged Arc WELDING (SAW)ApplicationsBrand name*11.

7 [F] designates FAMILIARC .AWS classificationFeaturesShielding gasThin plate joints[F] E70C-6C/6 MStable short-circuiting arc. Little or Ar+CO2 Medium plate joints[F] E71T-1 CHigher deposition rates in all position WELDING . CO2[F] E71T-1 CHigher deposition rates in vertical-up WELDING . CO2[F] E71T-9 CSuitable for ship-class E-grade [F] E71T-1C/1M, 9C/9 MSuitable for ship-class E-grade or Ar+CO2[F] E71T-1 MSuperior usability with low +CO2[F] E71T-5M-JBetter crack resistance with DCEN. Basic-type +CO2 Medium to thick plate joints[F] E70T-1 CHigher deposition rates.

8 Little [F] E70C-6 MHigher deposition rates. Little +CO2 Horizontal and flat fillets[F] E70T-1 CLarger legs. Better bead appearance and [F] E70T-1 CHigher resistance to inorganic zinc [F] E70T-1 MHigher resistance to inorganic zinc +CO2[F] E70T-9 CSuitable for ship-class E-grade [F] E70T-1 CHigher speeds on inorganic primer coated name*11.[F] designates FAMILIARC .AWS classificationFeaturesShielding gasThin to medium plate joints[F] ER70S-6 Stable short-circuiting arc. All-position or Ar+CO2[F] MG-50T-Stable short-circuiting arc. All-position or Ar+CO2[F] ER70S-3 Stable arc with lower +CO2[F] ER70S-GStable spray arc with higher +CO2 Thick plate joints[F] ER70S-GStable arc with higher [F] ER70S-GSuperior usability and mechanical +CO2 ApplicationsBrand name*11.

9 [F] designates FAMILIARC .AWS classificationFeaturesShielding gasThin to thick plate joints[F] ER70S-6 Superior properties after long time [F] ER70S-GSuitable for Al-killed steels for low pass in pipe joints[F] ER70S-2 More resistible to rusty name*11.[F] designates FAMILIARC .AWS classificationFeaturesThin plate joints[F] G-50 / [F] F7A2-EH14 Suitable for high speed to medium plate joints[F] G-60 / [F] F7A2-EH14 Suitable for high speed WELDING .[F] PF-H45 / [F] F6A4-EL8 Suitable for single or 4-5 multi-pass to thick plate joints[F] G-80 / [F] F7A2-EH14F6P2-EH14 Good performance in multi-pass WELDING .

10 [F] MF-38 / [F] F7A6-EH14F7P6-EH14 Better porosity resistance and X-ray soundness.[F] MF-300 / [F] F7A6-EH14F7P6-EH14 Better slag detachability.[F] PF-H55E / [F] F7A4-EH14 Double-sided two-pass or multi-pass and flat fillets[F] MF-53 / [F] F7A0-EH14 Better bead appearance and slag detachability. KOBELCO WELDING TODAY3 PRODUCTS SPOTLIGHTAn unsurpassed rutile flux-cored wire for mild steeland 490 MPa high tensile strength steel, which ishighly reputed for solid ultimate performance.