Home > Electrodes > AWS Class E309/309H-16 Electrodes
The E309/309H‑16 electrode is a coated stick welding filler metal crafted according to the American Welding Society (AWS) A5.4 / ASME SFA 5.4 standard. It’s designed for all-position welding of high-chromium, nickel-bearing austenitic stainless steels, particularly those that need a higher carbon content (the “H” version) to enhance strength at elevated temperatures and resist creep. This electrode offers fantastic arc stability, smooth deposition, dependable weld integrity, and effective performance for joining stainless steels to each other or to carbon/low-alloy steels in tough environments. ([Washington Alloy][1])
The typical chemistry for the 309H‑16 electrode weld metal deposit features: carbon levels around ~0.04‑0.08 % (which is higher than the low-carbon “L” variants) for improved high-temperature strength; chromium at approximately 22.0‑25.0 %; nickel ranging from 12.0‑14.0 %; manganese between 0.5‑2.5 %; silicon up to ~1.0 %; with limits on phosphorus (≤ 0.04 %) and sulfur (≤ 0.03 %). ([Oxford Alloys][2]) In terms of mechanical properties, welds typically reach tensile strengths of about ~80,000 psi (≈ 550 MPa) or more, with elongation of at least 30 %, and yield strength in the range of ~67‑71 ksi for 309H variants. ([Washington Alloy][1])
| Classification | AWS A5.4, E309/309H-16 |
| Form | Welding Electrode, Welding Rods |
| Type Of Current | AC-DCEP (Direct Current Electrode Positive) |
| Welding Position | F, V, OH, H |
| Size | 2.0 mm, 2.50 mm, 3.15 mm, 4.00 mm, 5.0 mm |
| AC/DC+ | AC or DC (+) |
| JIS Specification | BS 2926 19.9 A R |
| Other Specification | DIN 8556 E19 9 R 23 A |
| AWS E309/309H-16 Coated Electrodes Application & uses |
|
| C | Cr | Ni | Mo | Mn | Si | P | S | Cu |
| 0.04 | 22.0-25.0 | 12.0-14.0 | 0.75 | 0.5-2.5 | 1.00 | 0.04 | 0.03 | 0.75 |
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Designed for welding stainless steel to mild steel or other stainless steel types, these electrodes offer high corrosion resistance. Typically available in sizes like 3/32″ to 1/8″ diameter, they provide excellent weld quality with minimal spatter.
These electrodes are ideal for general-purpose welding, offering good corrosion resistance for stainless steel applications. Sizes usually range from 1/8″ to 3/16″ in diameter, and they ensure smooth welding with light flux coatings for improved visibility and control.
Suitable for heavy-duty welding tasks, these electrodes enhance corrosion resistance and are used for thick stainless steel sections. Common sizes include 5/32″ to 1/4″ diameter, featuring a thicker coating for robust and stable arc performance.
AWS Class E309/309H-16 Electrodes find a broad application base in petrochemical, shipbuilding, power generation, and pressure vessel making industries.These electrodes are ideal for welding those stainless steel pieces that are going to be operating in high temperature conditions, e.g., parts of furnaces, heat exchangers, and boiler tubing. They are also used for overlay welds, cladding, and repairing dissimilar steel structures that require thermal expansion and corrosion protection. They also possess excellent mechanical properties and resist thermal cycling as a result of which they have applications in heavy-duty structural tasks.
* Welding austenitic stainless steels like Type 309 (and its cast equivalents) at both normal and elevated service temperatures. ([Washington Alloy][1]) * Dissimilar-metal welding between stainless steels and carbon or low-alloy steels (for example, in overlay/buffer layers or cladding preparation). ([Weld Wire][3]) * Fabrication and repair in high-temperature, corrosive, or oxidizing environments—such as furnace components, chemical
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