AWS E310-16 Heat Resistant Stainless Steel Welding Electrode
It is suitable for welding 310/310S steels, furnace components, HK-40 furnace tubes, and dissimilar heat-resistant steel joints.
Welding power source: AC or DCEP (Direct Current Electrode Positive).
AWS E310-16 Stainless Steel Welding Electrode (SMAW, 25Cr-20Ni Heat Resistant)
Ocean Welding E310-16 is a fully austenitic 25Cr-20Ni stainless steel electrode featuring a rutile-calcia type coating and compliant with AWS A5.4 / ASME SFA-5.4 standards. This product is designed for high-temperature operating conditions with extremely high requirements for resistance to oxidation and phase stability. It is suitable for AC or DC reverse polarity (DCEP) power supplies and can be soldered in all positions except for downward vertical soldering. It is the preferred choice for welding heat-resistant stainless steels (such as 310, 310S, and 310H), furnace components, heat shields and piping, HK-40/HP-Nb cast alloys, and dissimilar joints between carbon/low-alloy steels and heat-resistant austenitic steels (for service temperatures up to approximately 1100°C). The product is manufactured by Hangzhou Lin'an Ocean Welding Materials Co., Ltd., a company active in the welding materials industry since 1995 with a portfolio of over 4,000 product specifications and an annual output of 2,000 tons; the company holds comprehensive certifications, including ISO 9001, CE, and SGS.
Product Overview & AWS Classification
| Attribute | Specification |
|---|---|
| AWS classification | AWS A5.4 / ASME SFA-5.4 E310-16 |
| Welding process | SMAW (Shielded Metal Arc Welding / stick welding) |
| Coating type | Rutile / lime-titania ("-16") |
| Current & polarity | AC or DCEP (DC electrode positive) |
| Welding position | All positions except vertical-down (F, H, V-up, OH) |
| Deposited metal | 25Cr-20Ni fully austenitic (FN ≈ 0) |
| Equivalent standards | ISO 3581-B ES 310-16 · GB/T 983 E310-16 (A402) · JIS Z3221 ES310-16 |
| Brand / MPN | Ocean Welding / E310-16 |
| Country of origin | Zhejiang, China (Mainland) |
Ocean Welding E310-16 has a fully austenitic weld metal structure, exhibiting excellent resistance to oxidation and carburization at temperatures up to approximately 1100°C. Its stable arc, easy slag removal, and stable performance under both AC and DC-EP power supplies make it the preferred consumable in the field of heat-resistant austenitic stainless steel welding.
Applications
Ocean Welding E310-16 is most commonly specified for:
- Compatible welding for heat-resistant austenitic stainless steels: 310, 310S, 310H, 314, 2520, DIN 1.4841, and 253 MA.
- Furnace and kiln equipment: Heat treatment furnace muffles, roller hearths, and baskets; radiant tubes; annealing pots; muffle furnaces; burner nozzles; heat shields; piping systems.
- Petrochemical and refining: Ethylene cracking furnace tubes (HK-40, HP-Nb); hydro-reforming furnace radiant tubes; Fluid Catalytic Cracking (FCC) unit internals; catalytic reactor buffer layers.
- Power boilers: High-temperature superheater/reheater outlet headers; P91 ↔ TP347H dissimilar metal transition joints.
- Kiln industry: Steel structural components and refractory lining plates for cement, glass, and ceramic kilns.
- High-temperature dissimilar metal joints: Carbon steel/low-alloy steel ↔ 310S, 321, 347, and other austenitic heat-resistant stainless steel grades.
The main service industries include: petrochemical and refining, hydrogen and syngas production facilities, thermal power generation, heat treatment workshops, cement/glass/ceramic kilns, and industrial furnace original equipment manufacturers (OEMs). These are the downstream markets that Ocean Welding has been deeply involved in for 25 years for its stainless steel and heat-resistant welding consumables.
Chemical Composition of Deposited Metal (AWS A5.4)
| Element | C | Mn | Si | P | S | Cr | Ni | Mo | Cu |
|---|---|---|---|---|---|---|---|---|---|
| AWS spec (wt %) | 0.08 – 0.20 | 1.0 – 2.5 | ≤ 0.75 | ≤ 0.03 | ≤ 0.03 | 25.0 – 28.0 | 20.0 – 22.5 | ≤ 0.75 | ≤ 0.75 |
| Ocean Welding typical | 0.12 | 2.0 | 0.60 | 0.020 | 0.010 | 26.5 | 21.2 | 0.08 | 0.03 |
Mechanical Properties (As-Welded)
| Property | AWS A5.4 Requirement | Ocean Welding Typical |
|---|---|---|
| Tensile strength Rm | ≥ 550 MPa (≥ 80 ksi) | 580 – 630 MPa |
| Yield strength Rp0.2 | - | ~ 560 MPa |
| Elongation A5 | ≥ 30 % | 35 – 40 % |
| Impact CVN @ + 20 °C | - | 55 – 65 J |
| Bend test | No cracks | Pass |
Recommended Welding Current & Best Practice
| Diameter × Length | Flat (F) | Vertical / Overhead |
|---|---|---|
| Ø 2.5 × 300 mm | 60 – 90 A | 55 – 80 A |
| Ø 3.2 × 350 mm | 75 – 110 A | 70 – 100 A |
| Ø 4.0 × 350 – 400 mm | 95 – 150 A | 90 – 135 A |
| Ø 5.0 × 400 mm | 130 – 200 A | – |
Best-practice notes
Redry electrodes at 250 – 350 °C for 1 hour before use; keep in an 80 – 150 °C heated quiver during welding to preserve rutile coating stability.
Use short arc, low travel speed, stringer bead technique; avoid wide weaving to reduce hot-cracking risk in fully austenitic deposits.
Interpass temperature ≤ 150 °C on the stainless side to preserve corrosion resistance; DCEP is preferred for smoother arc and reduced spatter.
No mandatory preheat for stainless-to-stainless joints; for carbon-side heavy sections use 100 – 150 °C preheat.
Sizes, Packaging & Delivery
Diameters available：Ø 2.0 / 2.5 / 3.2 / 4.0 / 5.0 mm (0.079″ – 3/16″)
Standard lengths：300 mm / 350 mm / 400 mm / 450 mm
Standard export packaging：5 kg / PVC box (shrink-wrapped moisture-proof inner bag) → 4 boxes = 20 kg / carton → 50 cartons = 1 ton / pallet; approx. 21 – 26 MT per 20′ FCL.
Alternative packaging on request：hermetically-sealed can (VacPac-style) available for long-haul export and hot-humid destinations.
OEM / private-label packaging accepted - bag, PVC box, carton and label print customised to the buyer's brand.
Delivery time：normally 8 – 25 days after order confirmation.
Loading ports：Shanghai / Ningbo / Yiwu.
Trade terms：EXW / FOB / CFR / CIF · payment T/T 30 % deposit, balance against B/L copy.
Samples：free samples on request (freight collect).
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