AWS Class E410-16 Welding Electrodes
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E410-16 Martensitic Stainless Steel Welding Electrode Supplier in India
Nicorex Alloys operates as a specialised supplier of martensitic and ferritic stainless welding consumables in Mumbai, India. The E410-16 deposit contains approximately 12.2% Cr, 0.10% C, and 0.65% Ni; a straight chromium martensitic composition without nickel enrichment.
We maintain E410-16 electrodes in ready stock per AWS A5.4 / ASME SFA 5.4. E410-16 is the 12.20% chromium martensitic welding electrode that delivers air-hardening deposits with strength, wear resistance, and moderate corrosion protection up to 815°C (1500°F). When steam turbine blades need rebuilding, valve seats demand erosion-resistant overlay, or furnace components require a hard, corrosion-resistant surface. E410-16 is a rutile-coated (-16) martensitic stainless steel SMAW electrode producing an air-hardening 12.20 Cr weld deposit classified as UNS W41010, ASME Section IX F-4, A-6, designed for P-6 base metals including AISI 410, 403, 405, 414, 416, 420, and CA-15 castings. As-welded tensile strength reaches 79,000 psi (545 MPa) with 24% elongation; PWHT at 760°C (1400°F) for 2 hours followed by slow furnace cooling is mandatory for structural applications. Available diameters are 2.4 mm (3/32″), 3.2 mm (1/8″), 4.0 mm (5/32″), and 4.8 mm (3/16″) in all positions on AC or DCEP. Industrial applications include across power generation, oil and gas, steel mills, and refinery sectors.
Nicorex Alloys supplies E410-16 electrodes with EN 10204/3.1B mill test certificates, ISO 9001 and ISO 14001 certification, and full batch traceability. Stock is held in hermetically sealed packaging for immediate dispatch across India and to export markets. Provide your diameter, quantity, and project specification to receive a quotation within 24 hours.
E410-16 Electrode Specifications & Standards Compliance
The E410-16 electrode specifications covering standards, classification, diameters, and mandatory thermal requirements are listed in the table below.
| AWS Classification | E410-16 |
|---|---|
| ASME SFA Specification | SFA 5.4 |
| UNS Number | W41010 |
| EN ISO Standard | EN ISO 3581-A ~ E 13 R 1 2 |
| Werkstoff Number | ~1.4006 (Reference Base Metal) |
| Welding Process | SMAW (Shielded Metal Arc Welding) |
| Coating Type | Rutile (Titania –16) |
| Polarity | AC or DCEP |
| Welding Positions | All Positions |
| Electrode Diameter | 2.4 mm, 3.2 mm, 4.0 mm, 4.8 mm |
| Electrode Length | 350 mm (14 in) |
What Does E410-16 Mean? — AWS A5.4 Martensitic Electrode Classification
E410-16 is a martensitic stainless SMAW electrode offering hard, wear-resistant, corrosion-resistant deposits for demanding industrial repair and overlay applications.
| Topic / Item | Details |
|---|---|
| Electrode type | E410-16 martensitic stainless steel SMAW electrode |
| Comparison to E308L / E316L | Unlike austenitic E308L/E316L, E410-16 is a martensitic, air-hardening stainless steel electrode |
| Metallurgical product | Martensitic, air-hardening stainless steel |
| Symbol “E” | Electrode |
| Number “410” | Weld deposit matching AISI 410 composition |
| 410 composition type | Straight 12.20% chromium martensitic stainless steel |
| Cooling behavior | Transforms to hard martensite upon air cooling |
| Contrast with 300-series austenitic | 300-series (e.g., E308L, E316L) remain soft and ductile after welding |
The “-16” suffix denotes a rutile-coated electrode usable on AC or DCEP in all positions. E410-16 produces a hard as-welded deposit (35–42 HRC) offering wear and erosion resistance but requiring controlled preheat and PWHT. Variants include tougher E410NiMo-16, non-hardening E430-16, and dissimilar joint E309L-16.
Chemical Composition of E410-16 Weld Deposit (%)
E410-16 produces straight chromium martensitic stainless weld metal, lacking the higher nickel, molybdenum, and copper typical of austenitic electrodes.
| Element | Carbon (C) | Chromium (Cr) | Nickel (Ni) | Molybdenum (Mo) | Manganese (Mn) | Silicon (Si) | Phosphorus (P) | Sulfur (S) | Copper (Cu) | Iron (Fe) |
|---|---|---|---|---|---|---|---|---|---|---|
| AWS A5.4 Range | 0.15 max | 11.5–13.5 | 0.75 max | 0.75 max | 1.0 max | 0.90 max | 0.04 max | 0.03 max | 0.75 max | Balance |
| Typical Deposit | 0.10 | 12.20 | 0.65 | — | 0.68 | 0.52 | 0.021 | 0.021 | — | Balance |
The 12.20% Cr forms the minimum threshold for stainless classification, creating a self-healing chromium oxide passive film. The 0.12% max carbon enables the martensitic transformation that gives E410 its characteristic hardness. Unlike austenitic E308L (18Cr-8Ni), which remains ductile, E410 deposits transform to hard martensite upon air cooling; this is a feature, not a defect, when the application demands wear resistance.
All-Weld-Metal Mechanical Properties of E410-16
E410-16 mechanical properties differ between as-welded and post-weld heat-treated conditions. PWHT is mandatory for most engineering applications.
| Condition | UTS | Yield Strength | Elongation | Charpy Impact | Hardness |
|---|---|---|---|---|---|
| AWS A5.4 Min | 75,000 psi (520 MPa) | Not specified | 20% min (PWHT) | Not applicable | — |
| Typical As-Welded | 79,000 psi (545 MPa) | 63,500 psi (438 MPa) | 24% | — | 35–42 HRC |
| After PWHT (760°C / 2 hr) | 100,000–120,000 psi (690–830 MPa) | 75,000–90,000 psi (520–620 MPa) | 15–20% | Improved after tempering | 25–35 HRC |
After PWHT at 760°C (1400°F) for 2 hours with slow furnace cooling, the deposit achieves a tempered martensite microstructure balancing strength, hardness, and ductility. The as-welded deposit is brittle and unsuitable for structural service without heat treatment. Avoid tempering in the 425-550°C (800-1025°F) range; this is the temper embrittlement zone for 410-type martensitic steels.
Base Metal Compatibility & P-Number Matrix for E410-16
E410-16 is qualified for the P-6 martensitic stainless family plus carbon and low-alloy steel overlay. The base metal compatibility matrix and overlay guidance are below.
| Base Metal | UNS | ASME P-No. | Notes |
|---|---|---|---|
| AISI 410 | S41000 | P-6 Grp 1 | Primary match |
| AISI 410S | S41008 | P-7 Grp 1 | Low-carbon variant |
| AISI 403 | S40300 | P-6 Grp 1 | Turbine-grade |
| AISI 405 | S40500 | P-7 Grp 1 | Ferritic, low C |
| AISI 414 | S41400 | P-6 Grp 3 | Ni-bearing |
| AISI 416 | S41600 | P-6 Grp 1 | Free-machining |
| AISI 420 | S42000 | P-6 Grp 3 | Higher carbon |
| CA-15 Casting | J91150 | P-6 | Cast 12.20Cr |
Overlay on Carbon Steel: E410-16 overlays carbon steel (P-1) and low-alloy steel (P-3, P-4) substrates for corrosion, erosion, and abrasion resistance. Preheat the carbon steel substrate to ≥200°C before overlay.
Dissimilar Joints (410 to Austenitic SS): Do not use E410-16 for joining 410 to 304/316 austenitic stainless. The martensitic deposit creates a hard, crack-prone zone at the fusion line. Use E309L-16 or ENiCrFe-3 instead.
Recommended Welding Parameters & Preheat/PWHT Procedure for E410-16
E410-16 is a hardening martensitic welding rod. You must preheat and do PWHT; if you skip these steps, the weld will be very brittle and likely to crack.
| Diameter (mm/in) | Flat (A) | Vertical & OH (A) | Voltage (V) | Polarity |
|---|---|---|---|---|
| 2.4 mm (3/32″) | 70-85 | 65-75 | 24-28 | AC or DCEP |
| 3.2 mm (1/8″) | 85-110 | 80-90 | 26-30 | AC or DCEP |
| 4.0 mm (5/32″) | 110-140 | 100-120 | 28-32 | AC or DCEP |
| 4.8 mm (3/16″) | 120-160 | 110-130 | 28-32 | AC or DCEP |
Mandatory Preheat & PWHT Procedure:
- Preheat: ≥200°C (400°F) for all thicknesses. Maintain an interpass temperature throughout welding.
- Interpass temperature is 200-315°C (400-600°F). Do not let the weld cool below 200°C between passes.
- Post-heat: Slow cool to 150°C (300°F) in insulating blankets immediately after welding. Do not air cool.
- PWHT: Heat to 760°C (1400°F), hold for a minimum of 2 hours (1 hr per 25 mm thickness), furnace cool to ≤315°C (600°F), then air cool.
- Avoid the 425-550°C (800-1025°F) range during heating and cooling — temper embrittlement zone.
- If PWHT is not possible, substitute E309L or ENiCrFe-3 for ductile austenitic weld metal.
- Re-drying: 250-300°C for 1 hour before use.
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Industrial Applications of E410-16 Martensitic Electrode
E410-16 is the preferred martensitic welding electrode across these 5 industry sectors.
- Power Generation: E410-16 rebuilds steam turbine blades, diaphragms, nozzle rings, shroud bands, and hydro-turbine CA-15 components, matching 410 stainless hardness and erosion resistance after PWHT.
- Oil & Gas: Used for hardfacing and build-up of valve seats, discs, trims, and choke internals, where 12–20Cr martensitic deposits provide corrosion resistance and hard sealing surfaces in CO₂/H₂S service.
-
Refinery & Petrochemical: Repairs furnace tube hangers, burner tips, supports, and cyclone liners in 410 stainless service up to 815°C, maintaining structural integrity, hardness, and corrosion resistance in hydrocarbon environments.
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Steel Mills: E410-16 overlays and repairs caster, table, pinch, and work rolls, restoring diameter, improving abrasion resistance, and withstanding thermal and mechanical wear better than softer austenitic overlays.
- General Engineering: Overlays carbon steel pump casings, impellers, fan blades, and wear plates in mining, cement, and material handling equipment, providing hard martensitic surfaces that resist slurry and particle erosion cost-effectively.
Storage, Handling & Re-Drying of E410-16 Electrodes
Store sealed containers at 15-25°C with relative humidity below 50%. Transfer to a holding oven at 100-150°C once opened.
Re-dry at 250-300°C (480-570°F) for 1 hour if moisture exposure is suspected. Although E410-16 is rutile-coated (not low-hydrogen), moisture introduces porosity and can raise diffusible hydrogen in the martensitic deposit; martensitic weld metal is particularly susceptible to hydrogen-induced cracking, making moisture control critical.
Maximum 3 re-baking cycles. Exposure limit in humid conditions: 4 hours. Shelf life: 3-5 years sealed; 6 months after opening. ER410 wire should be stored in dry, sealed bags.
How to Order E410-16 Electrode from Nicorex Alloys
To order the E410-16 Electrodes, follow these 10 important details:
- Electrode Type: SMAW; AWS A5.4 / ASME SFA-5.4: E410-16
- Size: 2.4 mm, 3.2 mm, 4.0 mm, 4.8 mm; electrodes
- Current Type: DCEP or AC
- Welding Position: All positions (1G, 2G, 3G, 4G, 6G)
- Material Grade: 410; UNS S41000; W.Nr. 1.4006; EN ISO 3581-A: E 13 R
- Quantity: Specify number of cans or total kg required
- Standard: AWS A5.4 / ASME SFA-5.4; EN ISO 3581; ASME Section IX
- Documentation: MTC EN 10204 3.1/3.2; Hardness Report; PWHT record; TPI certificate
- Packaging: Hermetically sealed metal cans; ISPM 15 compliant export cartons
- Delivery Destination: Domestic / International; specify port or delivery address
Frequently Asked Questions
Why is preheat mandatory when welding with E410-16?
Preheat ≥200°C (400°F) is mandatory to slow cooling, limit extreme martensite hardness, and prevent hydrogen-assisted cracking in the martensitic weld metal.
What is the recommended PWHT procedure for E410-16 Weld Deposits?
PWHT is done at 760°C (1400°F) for at least 2 hours, furnace cooled below 315°C (600°F) while avoiding 425-550°C, to temper the weld to about 25-35 HRC and improve ductility and toughness.
Can E410-16 be used without PWHT?
E410-16 may be used without PWHT for hardfacing/overlay where 35-42 HRC is desired, but structural or pressure welds require PWHT; otherwise, use E309L-16 or ENiCrFe-3 for ductile austenitic welds.
What are the ASME F-Number and A-Number for E410-16?
E410-16 has F-Number F-4 and A-Number A-6 (12Cr martensitic, Cr 11-15%, Ni ≤0.5%), requiring its own WPS qualification separate from austenitic (A-8) procedures.
What base metals can E410-16 weld besides AISI 410?
E410-16 welds AISI 403, 405, 410S, 414, 416, 420, CA-15 castings, and overlays carbon and low-alloy steels for corrosion/erosion/abrasion resistance, while E309L-16 is recommended for joints to austenitic stainless.
Does Nicorex Alloys supply E410-16 with matching ER410 TIG and MIG wire?
Yes, Nicorex Alloys supplies matching ER410 TIG rods and MIG wire with the same preheat and PWHT requirements to maintain consistent martensitic weld chemistry across SMAW, GTAW, and GMAW.
What is the difference between E410-16 and E410NiMo-16?
E410NiMo-16 contains ~4.5% Ni, 0.5% Mo, and lower C (≤0.06%), giving 22-28 HRC and higher toughness for critical turbines, whereas E410-16 is harder (35-42 HRC) for wear-resistant overlay and general 12Cr joining.