Stainless Steel ER410NiMo
UNS S41086
ER410NiMo is a nickel- and molybdenum-modified 13Cr martensitic filler wire (UNS S41086) used for 13Cr-4Ni castings such as CA6NM.
Reference datasheet — ER410NiMo is not in the instant-quote catalog. Upload your part and an engineer will quote it in this grade or suggest the closest stocked equivalent.
Values for the AW condition
ER410NiMo tempers and conditions
ER410NiMo is supplied in 4 conditions, soft to hard. AW is the default FabDigit quotes; the values on this page are for it.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Double temper (≈670 °C + ≈600 °C) for maximum toughness | Choose for hydro-turbine runner and pump-casing repairs requiring low-temperature CVN toughness; the second temper conditions the reformed austenite and gives the highest impact energy at moderate strength. | 660 | 820 | 22 | 26 HRC | — |
Normalized and tempered | Used when a repaired CA6NM/ZG04Cr13Ni4Mo casting receives the complete production heat treatment, giving weld metal properties matched to the base casting. | 680 | 830 | 20 | 27 HRC | 3 % IACS |
post-weld tempered 565–620 °C (single temper) | Standard AWS A5.9 qualification condition — tempered once at ~595 °C to soften the martensite and meet 760 MPa min tensile with good ductility. | 740 | 880 | 19 | 30 HRC | — |
AWDefault As-welded deposit | Default deposit condition straight from the arc — highest strength and hardness, lowest toughness; acceptable for build-up layers that will be machined or later tempered. | 830 | 950 | 14 | 38 HRC | — |
What is ER410NiMo?
ER410NiMo is a nickel- and molybdenum-modified 13Cr martensitic filler wire (UNS S41086) used for 13Cr-4Ni castings such as CA6NM. It offers better toughness and crack resistance than plain ER410, with roughly 830 MPa yield, 950 MPa tensile, 14% elongation and 355 HB (38 HRC) as welded, and is supplied as drawn spooled wire or cut rod. The deposit still needs preheat/interpass control and a 565–620 °C temper, machinability is low (score 22) and service temperature is capped near 400 °C. Use ER410 where matching plain 410 chemistry matters more than toughness. ER410NiMo has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,440°C (2,624 °F). ER410NiMo has a yield strength of 830 MPa (120 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 97% of stainless steel grades. Elongation at break is 14% and the elastic modulus is 200 GPa (29 Msi).
What is ER410NiMo used for?
- hydro turbine runner repair
- CA6NM castings welding
- pump impeller repair
Advantages
- High strength — 830 MPa (120 ksi), better than 97% of stainless steel grades
- Conducts heat well — 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades
- High electrical conductivity — 2.9 % IACS, better than 87% of stainless steel grades
Limitations
- Difficult to machine — 22/100, worse than 95% of stainless steel grades
- Limited ductility — 14%, worse than 91% of stainless steel grades
- Needs corrosion protection — 42/100, worse than 90% of stainless steel grades
- Low fracture toughness — 65 MPa·√m (59.2 ksi·√in), worse than 85% of stainless steel grades
- Limited service temperature — 400°C (752 °F), worse than 78% of stainless steel grades
ER410NiMo properties
Typical room-temperature values for ER410NiMo-AW; bars are the position among stainless steel grades.
Physical3
ER410NiMo has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 65% of stainless steel grades. It melts at 1,440°C (2,624 °F).
Mechanical15
ER410NiMo has a yield strength of 830 MPa (120 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 97% of stainless steel grades. Elongation at break is 14% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
ER410NiMo is rated for continuous service to 400°C (752 °F). It conducts heat at 25 W/m·K (14.4 BTU/hr·ft·°F), better than 93% of stainless steel grades. Thermal expansion is 10.8 µm/m·K (6 µin/in·°F).
Electrical3
ER410NiMo conducts electricity at 2.9 % IACS, better than 87% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is fair (42/100), worse than 90% of stainless steel grades.
Sustainability4
Producing a kilogram of ER410NiMo takes about 55 MJ of energy and emits 4.5 kg of CO₂ — more than 50% of stainless steel grades. Typical recycled content is 40%.
Manufacturability7
ER410NiMo's machinability is poor (22/100, worse than 95% of stainless steel grades); weldability good (65/100); formability poor (25/100).
Common Calculations5
Values are nominal handbook figures for design screening. Certified mill or lot data ships with every FabDigit order on request.
Strength versus weight in the stainless steel family
Yield strength against density for every stainless steel grade FabDigit runs. ER410NiMo is highlighted; hover a dot for its name, or open the interactive family chart.
Working with ER410NiMo
Is ER410NiMo easy to machine?
Machine after tempering — as-welded 38 HRC martensite work-hardens and abrades tooling; use rigid setups, coated carbide, low speed/heavy feed and finish-grind sealing surfaces.
Can ER410NiMo be welded?
Preheat/interpass typically 100–160 °C with low-hydrogen shielding (Ar or Ar+2% CO2 for GMAW), keep heat input moderate, cool below Mf (~100 °C) before tempering at 565–620 °C; avoid holding in the 400–500 °C embrittlement range.
Can ER410NiMo be formed, bent or molded?
Supplied only as drawn/spooled wire or cut rod; deposits are shaped by weld build-up and subsequent machining rather than cold forming.
ER410NiMo chemical composition (wt %)
Limits by weight percent from the governing specification, written the way the spec states them — a single maximum for impurities, a range for alloying elements, and the base element as balance. Nominal is the typical mid-range value.
| Element | Spec limit (wt %) | Nominal |
|---|---|---|
| Clow carbon keeps martensite soft and weldable | ≤ 0.06 | 0.03 |
| Cr | 11 – 12.5 | 11.8 |
| Nitoughness + reformed austenite | 4 – 5 | 4.5 |
| Mo | 0.4 – 0.7 | 0.55 |
| Mn | ≤ 0.6 | 0.5 |
| Si | ≤ 0.5 | 0.4 |
| P | ≤ 0.03 | |
| S | ≤ 0.03 | |
| Cu | ≤ 0.75 | |
| other, totalsum of unspecified elements per AWS A5.9 | ≤ 0.5 | |
| Fe | balance |
What surface finishes work on ER410NiMo?
Passivate or pickle after grinding to restore the Cr oxide film; takes a good mechanical or electropolished finish, and is readily hard-chrome plated or painted for cavitation-resistant hydro surfaces.
Surface treatments FabDigit runs on stainless steel parts — pick them in the quote configurator or call them out on the drawing. Each links to its datasheet in the surface-finish library (thickness, specs, call-out, material verdicts).
Passivation
Organic Coating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Stainless Steel ER410NiMo in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- S41086
How much does ER410NiMo cost?
ER410NiMo is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
ER410NiMo — frequently asked
What is ER410NiMo used for?
ER410NiMo is typically used for hydro turbine runner repair, CA6NM castings welding and pump impeller repair. In short: tougher than plain ER410; standard CA6NM repair wire; cavitation-resistant weld metal.
What is the yield strength of ER410NiMo?
ER410NiMo has a typical yield strength of 830 MPa (120 ksi) and a tensile strength of 950 MPa (138 ksi) — stronger than 97% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is ER410NiMo easy to machine?
Not especially — machinability is rated poor (22/100, worse than 95% of stainless steel grades). Machine after tempering — as-welded 38 HRC martensite work-hardens and abrades tooling; use rigid setups, coated carbide, low speed/heavy feed and finish-grind sealing surfaces.
Can ER410NiMo be welded?
Yes — weldability is rated good (65/100). Preheat/interpass typically 100–160 °C with low-hydrogen shielding (Ar or Ar+2% CO2 for GMAW), keep heat input moderate, cool below Mf (~100 °C) before tempering at 565–620 °C; avoid holding in the 400–500 °C embrittlement range.
What surface finishes work on ER410NiMo?
Passivate or pickle after grinding to restore the Cr oxide film; takes a good mechanical or electropolished finish, and is readily hard-chrome plated or painted for cavitation-resistant hydro surfaces.
Can ER410NiMo be formed, bent or molded?
Supplied only as drawn/spooled wire or cut rod; deposits are shaped by weld build-up and subsequent machining rather than cold forming.
What is the maximum service temperature of ER410NiMo?
ER410NiMo is rated for continuous use to about 400°C (752 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between ER410NiMo-AW and ER410NiMo PWHT-DT?
AW is the default condition — default deposit condition straight from the arc — highest strength and hardness, lowest toughness; acceptable for build-up layers that will be machined or later tempered. PWHT-DT: choose for hydro-turbine runner and pump-casing repairs requiring low-temperature CVN toughness; the second temper conditions the reformed austenite and gives the highest impact energy at moderate strength. Yield strength is 830 MPa in AW versus 660 MPa in PWHT-DT.
How much does ER410NiMo cost?
ER410NiMo is a premium-cost stainless steel ($$$), cheaper than about 51% of the materials FabDigit quotes. Part price depends far more on geometry, tolerance and quantity than on the raw stock — upload a CAD file for a live quote.
Sources
- AWS A5.9/A5.9M — Bare Stainless Steel Welding Electrodes and Rods (ER410NiMo, UNS S41086) — AWS (2017)
- ASTM A743/A743M & A487 — CA6NM castings (base metal matched by this filler) — ASTM (2019)
- GB/T 29713 / GB/T 17854 — SAC (2013)
- ASM Handbook Vol.6 Welding, Brazing and Soldering; Vol.1 Properties of Steels — ASM International (1993)
- Soft-martensitic 13Cr-4Ni-Mo solid wire datasheets (Böhler CN 13/4-IG class, Lincoln/ESAB equivalents) — voestalpine Böhler Welding / ESAB (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison; hardness values on non-Brinell scales are converted approximately for charting only. Manufacturability limits are FabDigit quote-engine defaults and may be relaxed by engineering review. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.