AWS Class ER410 MIG & TIG

ER410 MIG & TIG Welding Wire Supplier in Mumbai, India

Nicorex Alloys is an ISO 9001 and ISO 14001 certified stockist and supplier of ER410 MIG wire and TIG rods in Mumbai, India. We provide these wires classified under AWS A5.9 / ASME SFA 5.9.

ER410 (UNS S41080) is the standard bare solid filler wire for welding 400-series martensitic stainless steels. It’s a fully martensitic weld metal with Cr 11.5-13.5% and C 0.12% max. Where austenitic stainless is too soft, carbon steel corrodes too fast, and nickel alloys cost too much, ER410 fills the gap with a martensitic 12% Cr deposit that delivers corrosion resistance, hardness, and wear resistance in one classification. The weld metal naturally hardens in air to about 35-40 HRC. Because of this, you must use preheat at 175-315°C (350-600°F) and then perform post-weld heat treatment (PWHT) at 675-760°C (1250-1400°F). After PWHT, the weld metal typically achieves a tensile strength of about 552 MPa (80,000 psi) with 26% elongation. The wire matches base metals 403, 405, 410, 410S, 414, 416, and CA-15 castings, and works as a corrosion/erosion overlay on carbon steel. Applications of these welding wires span industries including power generation turbine components, oil and gas valve internals, mining wear overlays, and hardfacing base layers.

Nicorex Alloys supplies ER410 TIG rods and MIG spools with EN 10204/3.1B mill test certificates and full PMI traceability documentation. We also stock the companion E410-16 SMAW electrode and the upgraded ER410NiMo wire for applications demanding higher toughness.

ER410 Welding Wire Specifications

The specifications for ER410 MIG wire and TIG rod covering standards, processes, diameters, and more are as follows:

AWS Classification	ER410 as per AWS A5.9
UNS	S41080
Welding Processes	GTAW (TIG), GMAW (MIG), SAW
Polarity GTAW / GMAW	DCEN / DCEP
Positions	All (F, H, V-up, OH)
Shielding GTAW / GMAW	100% Argon / Ar + 1-2% O₂
TIG Rod Diameters	1.6, 2.0, 2.4, 3.2, 4.0 mm
MIG Wire Diameters	0.8, 0.9, 1.0, 1.2, 1.6 mm

AWS Classification Explained: What Does ER410 Mean?

The table below explains the meaning of each component in the ER410 designation, helping identify its welding filler classification and alloy type:

Designation	Meaning
ER	Electrode/Rod: bare solid welding wire used in GTAW, GMAW, and SAW processes
410	Alloy type referring to 12% Cr martensitic stainless steel corresponding to AISI Type 410

ER410 differs from common austenitic fillers like ER308L welding filler metal and ER316L welding filler metal because it air-hardens after welding to roughly 35-40 HRC. Therefore, preheat and post-weld heat treatment are typically required.

Weld Deposit Chemical Composition of ER410

The chemical composition of ER410 weld deposit per AWS A5.9, along with its typical values, is listed in the table below:

Material / Element	Carbon (C)	Chromium (Cr)	Nickel (Ni)	Molybdenum (Mo)	Manganese (Mn)	Silicon (Si)	Phosphorus (P)	Sulphur (S)	Copper (Cu)	Iron (Fe)
AWS A5.9 Range	0.12% max	11.5-13.5%	0.60% max	0.75% max	0.60% max	0.50% max	0.03% max	0.03% max	0.75% max	Balance
Typical	0.08%	12.90%	0.40%	0.15%	0.50%	0.40%	—	0.03%	—	Balance

Cr at 11.5-13.5% is the minimum threshold for stainless classification. C at 0.12% max drives the full austenite-to-martensite transformation on cooling. The low Ni (0.60% max) leaves the microstructure fully martensitic with some delta-ferrite and no austenite-stabilising additions.

All-Weld-Metal Mechanical Properties of ER410

The mechanical properties of ER410 MIG & TIG welding wire, including tensile strength, elongation and yield strength in the PWHT condition, are listed below:

Property	Tensile Strength	Yield Strength (0.2%)	Elongation	Hardness (as-welded)	Hardness (after PWHT)
Value	552 MPa (80,000 psi)	303 MPa (44,000 psi)	26%	~35-40 HRC (~340-390 HV)	~22-28 HRC (~230-290 HV)

Base Metal Compatibility & P-Number Matrix for ER410

The table below lists base metals, including their ASTM specifications, ASME P-Numbers for ER410 welding wire:

Base Metal	ASTM Grades	ASME P-No.	Note
410	A240, A268 TP410, A182 F6a, A217 CA-15	P-6 Grp 1/2/3	Primary matching base metal for ER410 filler
403	A240 Type 403	P-6	Similar martensitic stainless composition
405 / 410S	A240 Type 405, 410S	P-7 Grp 1	Ferritic grades are compatible with certain repair welds
414	A240 Type 414	P-6	High-strength martensitic stainless variant
416	A582 Type 416	P-6	Free-machining martensitic stainless
CA-15 Castings	A217 CA-15, A743 CA-15	P-6	Cast martensitic stainless steel components

ER410 is used when a matching martensitic weld deposit and equivalent mechanical properties are required.

Recommended Welding Parameters for ER410 Filler Wire

This table provides simple, practical welding parameters for ER410 filler wire to help you set correct current and voltage:

GTAW (TIG) — DCEN, 100% Argon:

Diameter	Current (A)	Voltage (V)
1.6 mm (1/16″)	60-120	11-15
2.4 mm (3/32″)	100-170	12-17
3.2 mm (1/8″)	150-220	13-18

GMAW (MIG) — DCEP, Ar + 1-2% O₂:

Diameter	Current (A)	Voltage (V)
0.9 mm (0.035″) Short Circuit	60-130	17-21
1.2 mm (0.045″) Spray	180-260	26-31

Mandatory Protocol: Preheat 175-315°C (higher range for sections >12 mm). Maintain interpass at 175-315°C. After the final pass, slow-cool to ~65°C before PWHT at 675-760°C for 1 hr/25 mm. Remove all hydrogen sources from the joint area. Use stringer beads to control heat input.

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Industrial Welding Applications of ER410 TIG & MIG Wire

ER410 TIG and MIG wires deliver hard-wearing, corrosion-resistant welds for demanding components, overlays, repairs, and hardfacing base layers.

Power generation: Used for welding and rebuilding steam turbine blades, valve stems, and governor components.
Oil and gas: Applied on pump shafts, valve internals, and CA-15 castings.
Mining: Carbon steel impellers and slurry pumps.
Petrochemical: Used on column internals made from 410/405/410S.
Food processing: Suitable for knife blades and mixing hardware made from 410/420 grades.
General maintenance: Ideal for the repair and welding of CA-15 pump casings and valve bodies.
Hardfacing base layers – Used as a buttering layer on carbon steel before depositing Stellite.

Storage and Handling of ER410 Welding Filler Wire

ER410 is solid bare wire and does not absorb moisture. However, the martensitic deposit is acutely susceptible to hydrogen-assisted cold cracking. Store in original sealed packaging at 15-30°C, <60% RH. Handle with clean gloves and stainless tooling. Degrease the base metal within 25 mm of the joint before welding.

Available Forms, Diameters and Packaging of ER410 Wire

Nicorex Alloys stocks ER410 MIG & TIG welding wires in the following forms, diameters and packaging:

Form	Diameters	Packaging
TIG Rod (GTAW)	1.6, 2.0, 2.4, 3.2, 4.0 mm	915/1000 mm tubes, 5 kg
MIG Wire (GMAW)	0.8, 0.9, 1.0, 1.2, 1.6 mm	15 kg spools
SAW Wire	1.6, 2.4, 3.2 mm	25 kg coils
E410-16 SMAW (companion)	2.5, 3.2, 4.0 mm	Sealed cans (2.5, 5 kg)

How to Order ER410 Welding Wire from Nicorex Alloys

To order ER410 MIG & TIG welding wire from Nicorex Alloys, provide these 9 important details:

Wire Type: GTAW (TIG) Cut Lengths / GMAW (MIG) Spools for 12% Cr Martensitic Stainless Steel
Size: 0.9mm / 1.2mm (GMAW) / 1.6mm / 2.4mm / 3.2mm (GTAW)
Current Type: DCEN (GTAW) / DCEP (GMAW)
Welding Position: All Positions
Material Grade: Martensitic Stainless Steel Wire / UNS S41080 / AWS A5.9: ER410 / W.Nr. 1.4006
Quantity: Number of spools/packs or total weight in kg
Standard: AWS A5.9 / ASME SFA 5.9, EN ISO 14343-A: W 13, ASME Section IX
Documentation: MTC 3.1/3.2, PMI Report, Weld Metal Composition Report, TPI Certificate
Delivery: Domestic

Frequently Asked Questions

Why is preheat mandatory when welding with ER410?

ER410 deposits martensitic weld metal that air-hardens to 35-40 HRC. This hard martensite is highly susceptible to hydrogen-assisted cold cracking. Preheating at 175-315°C slows cooling, allows hydrogen to diffuse out, and reduces residual stress. Skipping preheat on restrained ER410 joints virtually guarantees cold cracking.

What is the difference between ER410 and ER410NiMo?

ER410 (12.5% Cr, 0.6% Ni max) is the basic martensitic filler. ER410NiMo (12% Cr, 4.5% Ni, 0.5% Mo) adds nickel and molybdenum for superior impact toughness and cavitation resistance. ER410NiMo is preferred for hydro turbine runners and CA6NM castings; ER410 suits general overlay, valve repair, and maintenance work.

What PWHT temperature is required for ER410 Weld Deposits?

The PWHT temperature required for ER410 weld deposit is 675-760°C (1250-1400°F) for 1 hour per 25 mm of weld thickness. Do not temper between 425-600°C, as this range causes temper embrittlement.

Is ER410 suitable for Cryogenic or Sub-Zero Temperature Service?

No. ER410 martensitic deposits have a ductile-to-brittle transition temperature well above 0°C.