Nickel Alloy NiCr26MoW HF+A
Heat-treated state
EN 2.4608
HF+A = hot finished (hot rolled/forged) and annealed, descaled
Heavy plate, forged rings and large bar where hot working is followed by a full anneal; slightly coarser grain and lower strength than cold-finished product.
Values for the HF+A condition
Other NiCr26MoW tempers and conditions
NiCr26MoW is listed in 5 conditions; see the grade overview at NiCr26MoW.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
HF+AThis page Hot finished (hot rolled/forged) and annealed, descaled | Heavy plate, forged rings and large bar where hot working is followed by a full anneal; slightly coarser grain and lower strength than cold-finished product. | 320 | 700 | 45 | 170 HB | 1.5 % IACS |
SADefault Solution annealed | Standard delivery condition for sheet, plate, bar and tube; best ductility, corrosion resistance and high-temperature stability. | 350 | 730 | 45 | 180 HB | — |
Cold drawn and solution annealed bar/tube | Close-tolerance bar and tube with fine grain and good surface, annealed after drawing for maximum ductility. | 380 | 760 | 42 | 190 HB | 1.5 % IACS |
As-welded deposit | Property set for fabricated joints welded with matching or over-alloyed Ni-Cr-Mo consumables and left in the as-welded condition. | 400 | 700 | 32 | 200 HB | 1.4 % IACS |
Cold worked | Use where higher room-temperature strength or spring temper is needed; not for service above ~600 °C, where recrystallisation removes the cold-work benefit. | 800 | 1,000 | 12 | 30 HRC | 1.5 % IACS |
What is NiCr26MoW HF+A?
NiCr26MoW HF+A is NiCr26MoW heat treated to HF+A — heavy plate, forged rings and large bar where hot working is followed by a full anneal; slightly coarser grain and lower strength than cold-finished product. NiCr26MoW HF+A has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 69% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 210 GPa (30.5 Msi). NiCr26MoW HF+A has a density of 8.5 g/cm³ (0.307 lb/in³), heavier than 64% of nickel alloy grades. It melts at 1,340°C (2,444 °F). SA is the default condition FabDigit quotes; HF+A is available on request or by drawing note.
Advantages
- High service temperature — 1,150°C (2,102 °F), better than 95% of nickel alloy grades
NiCr26MoW HF+A properties
Typical room-temperature values for NiCr26MoW HF+A; 22 are specific to this condition. Other listed values are NiCr26MoW reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
NiCr26MoW HF+A has a density of 8.5 g/cm³ (0.307 lb/in³), heavier than 64% of nickel alloy grades. It melts at 1,340°C (2,444 °F).
Mechanical15
NiCr26MoW HF+A has a yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 69% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 210 GPa (30.5 Msi).
Thermal6
NiCr26MoW HF+A is rated for continuous service to 1,150°C (2,102 °F). It conducts heat at 10.5 W/m·K (6.07 BTU/hr·ft·°F), worse than 73% of nickel alloy grades. Thermal expansion is 13.5 µm/m·K (7.5 µin/in·°F).
Electrical3
NiCr26MoW HF+A conducts electricity at 1.5 % IACS, better than 59% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (85/100), better than 74% of nickel alloy grades.
Sustainability4
Producing a kilogram of NiCr26MoW HF+A takes about 155 MJ of energy and emits 12.5 kg of CO₂ — less than 58% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability8
NiCr26MoW HF+A's machinability is poor (24/100, better than 71% of nickel alloy grades); weldability very good (70/100); formability good (68/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with NiCr26MoW HF+A
Is NiCr26MoW easy to machine?
Machine like alloy 600/625: rigid setup, sharp positive-rake carbide, low surface speed (20–35 m/min), heavy constant feed to cut below the work-hardened layer, and flood coolant.
Can NiCr26MoW be welded?
Readily GTAW/GMAW/SMAW welded with matching or over-alloyed Ni-Cr-Mo filler; keep interpass below ~150 °C, low heat input, no preheat and no PWHT normally required, clean surfaces free of sulphur and grease.
Can NiCr26MoW be formed, bent or molded?
Cold forms well but with high loads and rapid work hardening — allow interstage anneals at 1080–1150 °C with rapid cooling; hot work in the 1150–950 °C range.
What surface finishes work on NiCr26MoW?
Pickle or grit-blast plus passivate after hot work/welding to restore the chromium oxide film; not anodisable, and any protective coatings must tolerate the intended furnace temperature.
NiCr26MoW 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 |
|---|---|---|
| Crhigh Cr for Cr2O3 scale formation | 24 – 27 | 26 |
| Mosolid-solution strengthening, pitting resistance | 1 – 2.5 | 1.8 |
| Whigh-temperature solid-solution strengthening | 1 – 2.5 | 1.8 |
| Feresidual | ≤ 3 | 1 |
| C | ≤ 0.1 | 0.06 |
| Si | ≤ 1 | 0.4 |
| Mn | ≤ 1 | 0.4 |
| P | ≤ 0.02 | — |
| S | ≤ 0.02 | — |
| Nibalance, typically 65–72 % | balance | — |
NiCr26MoW HF+A — frequently asked
What is NiCr26MoW HF+A used for?
NiCr26MoW HF+A is typically used for furnace muffles, radiant tubes, heat-treatment fixtures and industrial burner components. In short: service to 1150 °C; high-chromium furnace alloy; solid-solution, no ageing needed.
What is the yield strength of NiCr26MoW HF+A?
NiCr26MoW HF+A has a typical yield strength of 320 MPa (46.4 ksi) and a tensile strength of 700 MPa (102 ksi) — weaker than 69% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is NiCr26MoW HF+A easy to machine?
Not especially — machinability is rated poor (24/100, better than 71% of nickel alloy grades). Machine like alloy 600/625: rigid setup, sharp positive-rake carbide, low surface speed (20–35 m/min), heavy constant feed to cut below the work-hardened layer, and flood coolant.
Can NiCr26MoW HF+A be welded?
Yes — weldability is rated very good (70/100). Readily GTAW/GMAW/SMAW welded with matching or over-alloyed Ni-Cr-Mo filler; keep interpass below ~150 °C, low heat input, no preheat and no PWHT normally required, clean surfaces free of sulphur and grease.
What surface finishes work on NiCr26MoW HF+A?
Pickle or grit-blast plus passivate after hot work/welding to restore the chromium oxide film; not anodisable, and any protective coatings must tolerate the intended furnace temperature.
Can NiCr26MoW HF+A be formed, bent or molded?
Cold forms well but with high loads and rapid work hardening — allow interstage anneals at 1080–1150 °C with rapid cooling; hot work in the 1150–950 °C range.
What is the maximum service temperature of NiCr26MoW HF+A?
NiCr26MoW HF+A is rated for continuous use to about 1,150°C (2,102 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between NiCr26MoW-SA and NiCr26MoW-CW?
SA is the default condition — standard delivery condition for sheet, plate, bar and tube; best ductility, corrosion resistance and high-temperature stability. CW: use where higher room-temperature strength or spring temper is needed; not for service above ~600 °C, where recrystallisation removes the cold-work benefit. Yield strength is 350 MPa in SA versus 800 MPa in CW.
Sources
- DIN 17744 — Wrought nickel alloys with molybdenum and chromium — DIN (2002)
- DIN EN 10095 — Heat resisting steels and nickel alloys — CEN (1999)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- High-chromium Ni-Cr-Mo furnace alloy datasheets (VDM Metals / Böhler / Sandvik product data) — various producers (2023)
Property data is compiled from published supplier and standards handbooks and normalised for comparison. Nothing on this page is a certification — request mill certs, CoC or material test reports with your order.