Stainless Steel Welding Rod
Standard: AWS A5.4
Character: good corrosion resistance
trong stress corrosion resistance
excellent welding process performance
thermal crack resistance
M.O.Q:1ton
OEM/ODM: yes, available.
Products Description
E2209 is a duplex stainless steel welding rod, the weld metal organisation is martensite + ferrite.
It has good corrosion resistance, strong stress corrosion resistance, and excellent welding process performance and thermal crack resistance.
Product characteristics
- Corrosion resistance:
Resistant to chloride ion corrosion, pitting corrosion (passed ASTM G48 test) and hydrogen sulfide stress corrosion, suitable for seawater, oil and gas pipelines and other Cl⁻/H₂S media environments.
- Mechanical properties:
Tensile strength ≥690 MPa, elongation ≥15%, -40℃ impact toughness ≥80J (rutile type coating).
- Welding process:
AC and DC dual-use, DC reverse connection is recommended; no preheating is required, supports all-position welding, and reduces brittle phase precipitation.
- Organization stability:
Ultra-low carbon (C≤0.03%) and nitrogen-containing design (N 0.08%-0.20%) inhibit intergranular corrosion and σ phase formation.
Chemical Composition (Typical Values)
| Element | C | Cr | Ni | Mo | Mn | N | Si | P | S |
| Range | ≤0.04 | 21.5-23.5 | 7.5-10.0 | 2.5-3.5 | 0.5-2.5 | 0.08-0.20 | ≤1.00 | ≤0.04 | ≤0.03 |
| Instance Value | 0.018 | 22.5 | 8.6 | 3.2 | 1.53 | 0.15 | 0.58 | 0.021 | 0.006 |
Mechanical Properties
| Material | Ultimate Tensile Strength | Offset Yield Strength 0.2 % | Elongation (%) | ||
| psi | MPa | psi | MPa | ||
| ER 2209 | 104,400 | 720 | 81,200 | 560 | 26 |
How to use
1. Preparation before welding:
Welding rod drying: 300-350℃ for 1 hour (titanium calcium type)/250℃×1.5 hours (rutile type).
Weldment cleaning: thoroughly remove oil, rust and moisture to prevent pores and cracks.
2. Welding parameters:
| Diameter (mm) | Current Range (A) | Polarity (Recommended) |
| 2.5 | 50-85 | DC+/AC |
| 3.2 | 80-110 | DC+/AC |
| 4.0 | 130-150 | DC+/AC |
| 5.0 | 160-200 | DC+/AC |
3. Post-weld treatment:
Multi-layer and multi-pass welding reduces heat input, and no heat treatment is required after welding.
Application Areas
| Industry | Specific scenarios | Applicable material combinations |
|---|---|---|
| Marine engineering | Seawater desalination equipment, ship pipelines, offshore platform structures | SAF2205/304 dissimilar steel welding |
| Petrochemicals | Hydrogen sulfide reactor, urea synthesis tower, oil and gas pipeline | 022Cr22Ni5Mo3N same material welding |
| Energy and power | Nuclear power plant heat exchangers, high-pressure storage tanks | Duplex steel and carbon steel transition joint |
| Environmental protection equipment | Sewage treatment system, flue gas desulfurization device | Corrosion resistant lining welding |
Notes
- Welding material management:
Use immediately after unpacking, and unused welding rods must be sealed back into the drying oven (humidity ≤ 50%);
Secondary drying temperature and time strictly follow the coating type (titanium calcium type 300-350℃×1h, rutile type 250℃×1.5h).
- Storage conditions:
Cool and dry environment (temperature 10-30℃, humidity ≤60%), away from acid and alkali corrosive substances;
Shelf life of vacuum packaging is 3 years. It is recommended to use it within 3 months after opening.
FAQ
Q: Can E2209 weld 2205 duplex steel and 304 austenitic steel?
A: Yes, multi-layer and multi-pass welding is required to control heat input, and the tensile strength of the deposited metal is ≥690 MPa, which meets the strength requirements of dissimilar steel joints.
Q: How to choose between titanium calcium type and rutile type coating?
A: Titanium calcium type has strong versatility and is suitable for conventional environments; rutile type has better low-temperature toughness and is recommended for working conditions below -40℃.
Q: Is heat treatment required after welding?
A: Generally not required, but if the weldment needs to withstand cyclic loads, solution treatment (1000-1050℃ rapid cooling) is recommended.
How To Order
| TYPE： | E2209 welding rod |
|---|---|
| Material： | stainless steel welding rod |
| Size : | diameter: 2.5, 3.2, 4.0, 5.0 (customizable) |
| Length (mm): 300, 350, 400 (conventional) 450 (for long arc) |
|
| Torelance: | (-0.04/-0.01)mm |
| Packing: | 2kg,5kg/inner box 20kg/Carton 1000kg/Pallet |
| M.O.Q: | 1ton |
Product Trends
- Ultra-low carbon design (C≤0.03%) and nitrogen strengthening technology (N 0.08%-0.20%) further suppress the risk of intergranular corrosion and meet the needs of high-end fields such as nuclear power and deep-sea equipment.
- Forecast: The compound annual growth rate of duplex stainless steel welding materials is expected to reach 8.2% in the next five years, focusing on replacing traditional austenitic stainless steel (such as 304/316L) in corrosion-sensitive scenarios.
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