AWS A5.4 E410NiMo-16 Welding Electrode

AWS A5.4 E410NiMo-16 Welding Electrode Supplier in Mumbai, India

Nicorex Alloys is an ISO 9001 and ISO 14001 certified supplier and stockist of E410NiMo-16 martensitic stainless steel welding electrodes, based in Mumbai, India. We import and stock this specialist SMAW consumable for critical-service welding across hydropower, oil and gas, and power generation sectors.
E410NiMo-16 is a type of welding electrode with a special coating, classified under AWS A5.4 / ASME SFA 5.4, made for shielded metal arc welding of 13Cr-4Ni-Mo martensitic stainless steels. The weld material has about 12% chromium, 4.5% nickel, and 0.5% molybdenum. Higher nickel content eliminates delta ferrite, producing a fully martensitic weld with significantly enhanced toughness. Its usual features include 920 MPa tensile strength after welding, 870 MPa after stress-relieving annealing at 600°C, and 45 J at -10°C impact energy. The ‘-16’ wire may be utilised in all locations except vertical down and is suitable with AC or DCEP polarity for smooth arc transmission.

For 350 mm, diameters are 2.5, 3.2, 4.0, and 5.0 mm. Welding should be above 150°C and cooling below 250°C. Need 580-620°C PWHT. Heating over the Ac1 transition temperature (620-640°C) causes partial austenitization. Fresh untempered martensite forms after cooling. This technique uses CA6NM castings (P-6), wrought Type 410, 410S, 405 steels, carbon steel overlays, and low-alloy steel overlays. Process equivalent: E 13 4 R 3 2. For hydro turbine runners, CA6NM casting repairs, and valve surfaces, this welding rod is common. Every batch has MTC 3.1.

E410NiMo-16 Coated Electrode Specifications & Classifications

The following specifications and code classifications apply to E410NiMo-16 coated electrodes for SMAW applications, including their AWS and other required information.

AWS A5.4	E410NiMo-16
ASME SFA 5.4	E410NiMo-16
Coating Type	Rutile-Basic
Polarity	AC or DC+ (DCEP)
Welding Positions	All positions except vertical-down
Electrode Diameters	2.5, 3.2, 4.0, 5.0 mm
Electrode Length	350 mm (14 in.)

AWS Classification Breakdown: What Does E410NiMo-16 Mean?

Refer to this table to decode how every character in the AWS A5.4 designation identifies specific electrode parameters and performance.

Character	Meaning
E	Electrode — designed for the SMAW (stick welding) process
410	AISI 410 type weld deposit — straight chromium (11.0–13.5% Cr) martensitic stainless steel
-16	Rutile-type coating; AC or DCEP polarity; smooth spray-type arc; all-position (except vertical-down)

Nickel increases weld martensiticity without delta ferrite. Small ferrite fractions reduce 12Cr deposit toughness and fatigue resistance; thus, turbine runners and high-integrity castings must eliminate them. Ferrite remains in standard E410-16 since nickel is below 0.7%.

E410NiMo is also available as E410NiMo-15 (basic coating, DCEP only) for lower hydrogen. The -16 variant is more widely used due to AC/DCEP flexibility.

Chemical Composition of E410NiMo-16 Weld Deposit (%)

The E410NiMo-16 all-weld-metal deposit chemistry, specified under AWS A5.4, is engineered to eliminate delta ferrite through elevated nickel.

Element	C	Cr	Ni	Mo	Si	Mn	P	S	Cu
AWS A5.4 Requirement (wt%)	0.06 max	11.0–12.5	4.0–5.0	0.40–0.70	0.90 max	1.0 max	0.04 max	0.03 max	0.75 max
Typical (DuraMax)	0.031	12.1	4.7	0.50	0.32	0.50	–	–	–

Not wire or base metal composition, they are AWS A5.4 all-weld-metal values. Nickel at 4.0-5.0% removes delta ferrite, unlike E410 at 0.7% max. Low carbon (0.06% max vs. 0.12% for E410) decreases as-welded hardness.

All-Weld-Metal Mechanical Properties of E410NiMo-16

E410NiMo-16 weld deposit properties are reported in multiple conditions because PWHT significantly affects final performance.

Property	Tensile Strength	Yield Strength (0.2%)	Elongation	Charpy V-Notch Impact	Hardness
As-Welded (Typical)	924 MPa (134 ksi)	848 MPa (123 ksi)	18%	–	~30–38 HRC
Stress Relief 600°C / 8 h	870 MPa (126 ksi)	650 MPa (94 ksi)	20%	45 J at −10°C; 40 J at −40°C	~22–28 HRC (post-PWHT)
AWS A5.4 Minimum	760 MPa (110 ksi)	–	15% min	Not specified	–

Because of its ferrite-free matrix and reduced carbon, E410NiMo has a softer deposit than ordinary E410 (35-42 HRC). The exceptional 45 J Charpy toughness at −10°C is the primary reason this electrode is favoured over E410-16 for turbine and valve applications. PWHT must not exceed 620°C (1150°F). Higher temperatures re-austenitize the weld metal, forming fresh untempered martensite on cooling.

Base Metal Compatibility & P-Number Matrix for E410NiMo-16

E410NiMo-16 is the industry-standard electrode for CA6NM hydro turbine runners and pump casings. Compatible base metals and ASME P-Number groupings are listed below.

Base Metal	UNS	ASME P-No.	Notes
CA6NM (Cast 13Cr4Ni)	J91540	P-6	Group 4 martensitic stainless casting used for turbine runners, pump bodies, and hydro components
AISI 410 (wrought)	S41000	P-6 Gr.1	Standard martensitic stainless steel base metal
AISI 410S (low-C)	S41008	P-7 Gr.1	Low-carbon ferritic stainless steel variant
AISI 405 (low-Cr ferritic)	S40500	P-7 Gr.1	Ferritic stainless steel with improved weldability
CA-15 Castings	J91150	P-6	Martensitic stainless casting equivalent to wrought 410
Carbon Steel (substrate)	—	P-1	Used for corrosion-resistant overlay cladding
Low-Alloy Steel	—	P-3, P-4, P-5	Overlay welding for wear or corrosion protection

Warning: For dissimilar joints between CA6NM and austenitic stainless (304, 316), do not use E410NiMo-16. Use E309L-16 or ENiCrFe-3 to avoid brittle martensitic dilution zones.

Recommended Welding Parameters for E410NiMo-16 Electrode

Parameters below apply to AC or DCEP polarity. Use short arc length and minimal weaving for the cleanest deposit.

Diameter (mm)	Diameter (in.)	Current, Flat (A)	Current, Vert/OH (A)	Voltage (V)
2.5	3/32	70-85	65-75	24-28
3.2	1/8	85-110	80-90	26-30
4.0	5/32	110-140	100-120	28-32
5.0	3/16	120-160	110-130	28-32

Thermal control: Preheat all thicknesses to 150°C (300°F). Keep interpass at 150-250°C. Stress relief should be performed at 580-620°C for 1-4 hours, depending on section thickness. Pre-PWHT slow-cool thick CA6NM sections under insulation instead of ambient.

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Industrial Welding Applications of E410NiMo-16 Electrode

The following are industrial applications of the E410NiMo-16 Electrode

Francis, Kaplan, and Pelton turbine runner construction and maintenance are the principal uses. Because the ferrite-free deposit avoids leading-edge cavitation-fatigue fractures, E410NiMo-16 rebuilds wicket gates, guiding vanes, and damaged surfaces. CA6NM castings are 50-200 mm thick and need precise PWHT and preheat.
E410NiMo-16 repairs ASTM A743 CA6NM castings, high-pressure pump casings, and wellheads. ≤22 HRC unless project specification states otherwise
Steam turbine blades, compressor impellers, and generator rotors utilise this rod. Ferrite-free deposits enhance cyclic fatigue resistance. Coordinate PWHT at 580-620°C with turbine OEM specifications.
The use of corrosion-resistant 13Cr-4Ni-Mo overlay on carbon steel valve internals, pump wear rings, and slurry-handling surfaces is rising. Single-layer deposits accomplish target chemistry without buffers. Stringer beads reduce dilution
Portable warmup gear (minimum 150°C) repairs broken CA6NM castings, worn valve seat build-up, and sealing surface restoration in emergencies. Field PWHT utilises resistance heating blankets; thermocouples measure 580-620°C during hold.

Storage, Handling & Re-Drying of E410NiMo-16 Electrodes

Keep unopened packages in a dry warehouse below 60% RH. Transfer to a 120-150°C (250-300°F) holding oven after opening. Rutile-basic coating provides moderate moisture resistance; crucial applications and exposure should be restricted to 4-8 hours. Manufacturers re-dry at 350°C for 2 hours (ESAB) or 260°C for 1 hour (Hobart). 1-2 hours at 250-350°C works for most brands. Maximum 3 reconditioning cycles. Electrodes are vacuum-packed for turbine and pressure vessel operations; return to oven within 2 hours.

How to Order E410NiMo-16 Welding Rod from Nicorex Alloys

Request a quotation for E410NiMo-16 coated electrodes by providing the following 10 details:

AWS Classification: E410NiMo-16 per AWS A5.4 / ASME SFA-5.4
Diameter: 2.4 mm / 3.2 mm / 4.0 mm / 4.8 mm
Quantity: Specify kg or number of canisters
Testing / Certification: MTC 3.1/3.2; Hardness Report; PWHT record; TPI
Base Metal: UNS S41500 / CA6NM castings or similar — specify
Material Grade: UNS S41526; W.Nr. 1.4313; EN ISO 3581-A: E 13 4 R
Third-Party Approvals: ABS / BV / LR / TÜV
Applicable Code: ASME VIII, IX, B31.3 — specify
Delivery: Domestic / International — specify port or address
Remarks: Confirm CA6NM / 410S base metal; hydro turbine / offshore application

Nicorex Alloys also supplies matching ER410NiMo TIG rods and ER410NiMo MIG wire for multi-process WPS qualifications on CA6NM projects.

Frequently Asked Questions

What is the Price of E410NiMo-16 Welding Electrode per Kg in India?

E410NiMo-16 is a specialty electrode that commands a premium over standard E410-16 due to higher nickel (4.0-5.0% Ni). Pricing varies with diameter, quantity, packaging, and certification. Contact Nicorex Alloys for a competitive quotation.

What is the Difference Between E410NiMo-16 and E410NiMo-15 Welding Electrodes?

Each deposit is a 13Cr-4.5Ni-0.5Mo weld. E410NiMo-16 AC or DCEP rutile-basic coating sprays nicely. The lime coating on DCEP only in E410NiMo-15 decreases hydrogen and enhances toughness. CA6NM manufacture prefers E410NiMo-16, although thick-section turbine runners and WPS-mandated basic-coated consumables utilise E410NiMo-15.

Can E410NiMo-16 Electrode Be Used for Overlay Cladding on Carbon Steel?

Yes. Valve internals, pump wear rings, and erosion-resistant surfaces often have a 13Cr-4Ni-Mo overlay on carbon or low-alloy steel. Stringer beads reduce dilution. Two layers are required for corrosion resistance. After preheating the substrate to ≥150°C, apply PWHT at 580-620°C.

Which Third-Party Shipping and Classification Society Approvals Are Available for E410NiMo-16?

Nicorex Alloys stocks E410NiMo-16 with approvals including DNV, ABS, Lloyds Register, Bureau Veritas, TUV, CE Mark, and CWB. State requirements at enquiry so the correct batch can be allocated. All shipments include MTC 3.1 per EN 10204 as standard

Does Nicorex Alloys Supply Matching ER410NiMo TIG and MIG Wire for CA6NM Welding?

Yes. ER410NiMo (AWS A5.9) TIG rods are 2.4 mm and 3.2 mm (1 m length, 5-kilogram packs), and MIG wire is 0.9-1.6 mm on D200/D300 spools. Buying the whole consumable set from one provider simplifies multi-process WPS certification and maintains deposit chemistry.

When Not to Use E410NiMo-16 Welding Electrode?

If CA6NM and austenitic grades (304, 316) have different joints, use E309L-16 or ENiCrFe-3. Do not use the deposit without PWHT at 580-620°C; as-welded martensite (30-38 HRC) is too brittle. If your code demands 730-760°C, utilise E410-16 instead of PWHT above 620°C.