ER310 Welding Wire (310 Stainless): TIG Filler Rod & MIG Wire Supplier in India
Nicorex Alloys is an ISO 9001 and ISO 14001 certified Mumbai-based supplier and stockist of ER310 welding wire, classified under AWS A5.9 / ASME SFA-5.9, UNS S31080.
ER310 is a high-chromium, high-nickel austenitic stainless steel solid wire with 25-28% Cr and 20-22.5% Ni. It produces a fully austenitic weld deposit with zero ferrite. The moderate carbon content of 0.08-0.15% is deliberate. It provides carbide strengthening for high-temperature creep resistance above 800°C. This wire is the only standard stainless steel filler wire rated for continuous oxidation resistance up to 1150°C (2100°F). The 26% Cr and 21% Ni form a stable, adherent chromium oxide scale that resists spalling under thermal cycling.
ER310 is available as TIG rods (0.8 to 4.0 mm), MIG spools (0.8 to 1.6 mm), and SAW wire (2.4 to 4.0 mm), and it can weld AISI 310, 310S, and 314 wrought steels, ASTM A297 HK/HT heat-resistant castings, and different types of stainless steels. This alloy is used in industries such as heat treatment, petrochemical refining, power generation, incineration, steel production, and glass manufacturing, where weld deposits are constantly exposed to temperatures above 900°C and need to resist breaking off due to oxide scale. All wire supplied by Nicorex Alloys ships with MTC 3.1 per EN 10204, batch-tested to AWS A5.9 requirements.
ER310 Welding Wire Specifications
| UNS Number | S31080 |
|---|---|
| Welding Processes | GTAW (TIG), GMAW (MIG), SAW, PAW |
| Polarity (GTAW / GMAW) | DCEN / DCEP |
| Shielding Gas (GTAW / GMAW) | 100% Argon / Ar + 2% O₂ |
| TIG Rod Diameters | 0.8, 0.9, 1.2, 1.6, 2.4, 3.2, 4.0 mm |
| MIG Wire Diameters | 0.8, 0.9, 1.2, 1.6 mm |
AWS Classification Explained: What Does ER310 Mean?
Each part of the AWS designation carries metallurgical meaning.
| Designator | Meaning |
|---|---|
| ER | Electrode/Rod: bare solid wire for GTAW, GMAW, and SAW |
| 310 | Composition type: 25% Chromium, 20% Nickel (the 25-20 designation in the AISI system) |
Chemical Composition of ER310 Weld Deposit (%)
| Material | Carbon (C) | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulphur (S) | Copper (Cu) |
|---|---|---|---|---|---|---|---|---|---|
| AWS A5.9 | 0.08 – 0.15% | 25.0 – 28.0% | 20.0 – 22.5% | 0.75% max | 1.0 – 2.5% | 0.30 – 0.65% | 0.03% max | 0.03% max | 0.75% max |
| Typical | 0.10% | 26.00% | 21.00% | 0.15% | 1.70% | 0.50% | 0.012% | 0.010% | — |
All-Weld-Metal Mechanical Properties of ER310
| Material | Tensile Strength | Yield Strength (0.2%) | Elongation | Reduction of Area |
|---|---|---|---|---|
| Typical (WeldWire) | 600 MPa (87,000 psi) | 393 MPa (57,000 psi) | 43% | 68% |
| Typical (Weldtool) | 617 MPa (89,500 psi) | 417 MPa (60,500 psi) | 41% | – |
Base Metal Compatibility for ER310
| Base Metal | AISI/ASTM | P number | Notes |
|---|---|---|---|
| 310 SS | AISI 310 | P-8 | Primary matching application |
| 310S SS | AISI 310S | P-8 | Low-carbon variant of 310 |
| HK Cast | ASTM A297 HK | P-8 | 25Cr-20Ni heat-resistant casting |
| HT Cast | ASTM A297 HT, | P-8 | 15Cr-35Ni high-temp casting |
Recommended Welding Parameters for ER310 TIG & MIG Wire
| Diameter | Amps (DCEN) | Volts | Gas |
|---|---|---|---|
| 0.9 mm (0.035″) | 60-90 | 12-15 | 100% Argon |
| 1.2 mm (0.045″) | 80-110 | 13-16 | 100% Argon |
| 1.6 mm (1/16″) | 90-130 | 14-16 | 100% Argon |
| 2.4 mm (3/32″) | 120-175 | 15-20 | 100% Argon |
| Diameter | Amps | Volts | Gas |
|---|---|---|---|
| 0.9 mm (0.035″) | 60-220 | 16-29 | Ar + 2% O₂ |
| 1.2 mm (0.045″) | 160-260 | 25-30 | Ar + 2% O₂ |
| 1.6 mm (1/16″) | 230-350 | 27-31 | Ar + 2% O₂ |
Low heat input is critical for ER310: the zero-ferrite deposit is susceptible to hot cracking. Use stringer beads only; no weaving. Keep interpass temperature below 150°C (302°F).
Get ER310 Filler Wire at Competitive Prices
Industrial High-Temperature Welding Applications of ER310 Filler Wire
- Heat treatment furnace equipment: radiant tubes, muffles, retorts, conveyor belts, and furnace linings up to 1150°C.
- For continuous line roll annealing and galvanising. It gives rollers in the steel processing line the stability they need to withstand the tremendous heat.
- Refractory anchors and kiln furniture in cement kilns, incinerators, and petrochemical heaters.
- Petrochemical furnace tube hangers and guide brackets in ethylene cracker and reformer furnaces above 900°C.
- ASTM A297 HK/HT casting repair: the matching filler for HK-40 centrifugally cast furnace tubes.
- Fabricates high-temperature grates and afterburners. Its oxidation resistance ensures structural stability in corrosive, extreme-heat flue gas environments.
- Essential for molten glass stirrers and annealing rolls. It maintains mechanical strength while in constant contact with molten materials.
- Targeted at superheater tube-to-header transitions. It provides the essential thermal stability required for high-pressure, 310-grade steam systems.
- High-performance manifolds and turbochargers. It is the premium upgrade over 309L, offering superior creep resistance for extreme exhaust heat.
Storage and Handling of ER310 Welding Wire
Available Forms, Diameters and Packaging of ER310 Filler Wire
| Form | Diameters | Packaging |
|---|---|---|
| TIG Rod (GTAW) | 0.8, 0.9, 1.2, 1.6, 2.4, 3.2, 4.0, 5.0 mm | 5 kg tubes, 1000 mm lengths |
| MIG Spool (GMAW) | 0.8, 0.9, 1.2, 1.6 mm | D200 (12.5 kg), D300 (15 kg) |
| SAW Wire | 2.4, 3.2, 4.0, 5.0 mm | 25 kg coils, 60 lb coils |
How to Order ER310 Welding Wire from Nicorex Alloys
- Wire Type - GTAW / GMAW Solid Wire (ER310)
- Size - 0.8mm to 3.2mm (GTAW cut lengths)
- Current Type - DCEN (GTAW) / DCEP (GMAW)
- Welding Position - All Positions
- Material Grade - ER310 / UNS S31080 / AWS A5.9 / ASME SFA 5.9 / DIN 1.4842 / EN ISO 14343: G 25 20
- Quantity - Number of spools/packs or total weight in kg
- Standard - AWS A5.9 / ASME SFA 5.9 (ER310), EN ISO 14343, ASME Section IX
- Documentation - MTC EN 10204 3.1/3.2, Chemical Composition Report, Mechanical Properties Report, TPI Certificate
- Packaging - Vacuum-sealed foil bag with silica gel desiccant, ISPM 15-compliant export cartons
- Delivery Destination - (specify port of discharge or delivery address)
Frequently Asked Questions
What is the Price of ER310 Stainless Steel Welding Wire per kg in India?
Pricing of ER310 SS welding wire depends on diameter, form, and volume. ER310 costs more than 308L or 309L due to its high nickel content (20-22.5%). Contact Nicorex Alloys with your specification and quantity.
Why is the ER310 Weld Deposit Fully Austenitic, and what does this mean for Welding Technique?
What is the Maximum Service Temperature for ER310 Weld Deposits?
Is there an ER310L (Low-Carbon) Welding Wire Available?
No. AWS A5.9 does not include ER310L. The 0.08-0.15% carbon is intentional for creep resistance.
What is the Difference between ER310 and ER310H?
ER310 has 0.08-0.15% carbon; ER310H has 0.35-0.45%. Both share the same Cr/Ni balance. ER310H is for severe carburising service (pyrolysis tubes). ER310 covers general high-temperature oxidation.
What Are the F-Number and A-Number for ER310 per ASME Section IX?
The F-number and A-number for ER310 are F-6 and A-8 per ASME Section IX. A welder qualified with any F-6 filler (ER308L, ER316L, ER310) is qualified for all F-6 fillers per QW-433.
What Spool Sizes and TIG Rod Lengths are Available for ER310?
When should ER310 not be used?
Do not use ER310 for standard carbon steel-to-stainless joints. Avoid where sensitisation resistance is the priority. Do not exceed 1150°C continuous service. Never use excessive heat input or weaving. The zero-ferrite deposit will crack.