CHARACTERISTICS & APPLICATIONS
íshín-309B has nominal composition (wt. %) of weld metal 23.5 Cr, 13 Ni with carbon levels allowed up to 0.15 percent and typical ferrite levels from 3 to 20 FN. These electrodes are used for welding similar compositions in wrought or cast form. They are also used for welding dissimilar steels, such as joining Type 304 to carbon or low-alloy steel, welding the clad side of Type 304-clad steels, making the first layer of a 308-weld cladding, and applying stainless steel sheet linings to carbon steel shells. Embrittlement or cracking can occur if these dissimilar steel welds are subjected to a post weld heat treatment or to service above 370°C. Occasionally, they are used to weld Type 304 and similar base metals where severe corrosion conditions exist, thereby requiring higher alloy weld metal. Essentially, there are two electrodes contained within this specification, E309H and E309L, and for critical applications their use is encouraged.
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 |
| 0.15 | 22.0-25.0 | 12.0-14.0 | 0.75 | NS | 0.5-2.5 | 1.00 | 0.04 | 0.03 | NS | 0.75 | NS |
Single values are maxima, except where specified otherwise.
ALL-WELD-METAL MECHANICAL PROPERTIES
| Tensile Strength, MPa | Yield Strength, At
0.2% Offset, MPa |
Elongation % | Lateral Expansion,
mm |
Charpy V-Notch Impact
at NS°C, Joules |
| 550 | NS | 30 | 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.