CHARACTERISTICS & APPLICATIONS
íshín-430B deposits weld metal containing between 15 and 18 Cr (wt. %). The composition is balanced by providing sufficient chromium to give adequate corrosion resistance for the usual applications and yet retain sufficient ductility in the heat-treated condition to meet the mechanical requirements of the specification. (Excessive chromium will result in lowered ductility.) Welding with E430 electrode usually requires preheating and post heating.
Optimum mechanical properties and corrosion resistance are obtained only when the weldment is heat treated following the welding operation.
These electrodes are usable with dcep (electrode positive) only. While use with alternating current is sometimes accomplished, they are not intended for use with this type of current. Electrode sizes 4.0 mm and smaller may be used in all positions of welding.
Storage and Drying Conditions: Hydrogen can have adverse effects on welds in some steels under certain conditions. One source of this hydrogen is moisture in the electrode coverings. For this reason, the proper storage, treatment, and handling of electrodes are necessary.
Holding Ovens: 125°C–150°C.
Drying Conditions: 250°C–425°C for 1 hour prior to use.
CHEMICAL COMPOSITION OF UNDILUTED WELD
C | Cr | Ni | Mo | Nb+Ta | Mn | Si | P | S | N | Cu | Others |
0.10 | 15.0-18.00 | 0.60 | 0.75 | NS | 1.00 | 0.90 | 0.04 | 0.03 | NS | 0.75 | NS |
Single values are maxima, except where specified otherwise.
ALL-WELD-METAL MECHANICAL PROPERTIES
Heat to 760°C to 790°C, hold for two hours (–0, +15 minutes), furnace cool at a rate not exceeding 55°C per hour to 595°C and air cool to ambient. Preheat: 150°C minimum and Interpass Temperature: 260°C maximum
Tensile Strength, MPa | Yield Strength, At 0.2% Offset, MPa | Elongation % | Lateral Expansion, mm | Charpy V-Notch Impact at NS°C, Joules |
450 | NS | 20 | NS | NS |
Single values are minimal.
ELECTRODE SIZE & WELDING CURRENT (DCEP)
DIAMETER, mm | LENGTH, mm | Amperes |
2.50 | 350 | 65-90 |
3.15, 3.20 | 350 | 90-120 |
4.00 | 350 | 120-150 |
5.00 | 350 | 160-200 |
WARNING: Safety and health information is available from many sources, including, but not limited to Safety and Health Fact Sheets listed in A11.3, ANSI Z49.1 Safety in Welding, Cutting, and Allied Processes published by the American Welding Society, 8669 Doral Blvd., Suite 130, Doral, FL 33166., and applicable federal and state regulations. The Safety and Health Fact Sheets are revised, and additional sheets added periodically.