Nickel Alloy 2.4889 HRAnn
Heat-treated state
EN 2.4889
HRAnn = hot rolled + annealed bar / rod
Heavy-section bar and rod for cast-in heaters, electrodes and machined fixtures rather than fine wire.
Values for the HRAnn condition
Other 2.4889 tempers and conditions
2.4889 is listed in 4 conditions; see the grade overview at 2.4889.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
HRAnnThis page Hot rolled + annealed bar / rod | Heavy-section bar and rod for cast-in heaters, electrodes and machined fixtures rather than fine wire. | 350 | 720 | 35 | 160 HB | 1.5 % IACS |
AnnealedDefault Annealed (soft, bright-annealed wire / strip) | Standard stocked condition for winding heating coils and forming elements — maximum ductility, stable resistance. | 400 | 760 | 30 | 170 HB | — |
Half hard | Choose when coils must hold shape during handling but still be bendable; intermediate strength. | 700 | 950 | 15 | 235 HB | 1.5 % IACS |
Hardened | Cold-drawn wire for stiff straight elements, resistor windings and cut-to-length parts; anneals out at first heat-up. | 950 | 1,150 | 4 | 32 HRC | 1.4 % IACS |
What is 2.4889 HRAnn?
2.4889 HRAnn is 2.4889 heat treated to HRAnn — heavy-section bar and rod for cast-in heaters, electrodes and machined fixtures rather than fine wire. 2.4889 HRAnn has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 720 MPa (104 ksi) — weaker than 60% of nickel alloy grades. Elongation at break is 35% and the elastic modulus is 216 GPa (31.3 Msi). 2.4889 HRAnn has a density of 8.12 g/cm³ (0.293 lb/in³), lighter than 76% of nickel alloy grades. It melts at 1,380°C (2,516 °F). Annealed is the default condition FabDigit quotes; HRAnn is available on request or by drawing note.
Advantages
- High service temperature — 1,250°C (2,282 °F), better than 100% of nickel alloy grades
- Forms and bends easily — 80/100, better than 91% of nickel alloy grades
- Conducts heat well — 14 W/m·K (8.09 BTU/hr·ft·°F), better than 77% of nickel alloy grades
Limitations
- Needs corrosion protection — 68/100, worse than 82% of nickel alloy grades
2.4889 HRAnn properties
Typical room-temperature values for 2.4889 HRAnn; 21 are specific to this condition. Other listed values are 2.4889 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
2.4889 HRAnn has a density of 8.12 g/cm³ (0.293 lb/in³), lighter than 76% of nickel alloy grades. It melts at 1,380°C (2,516 °F).
Mechanical13
2.4889 HRAnn has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 720 MPa (104 ksi) — weaker than 60% of nickel alloy grades. Elongation at break is 35% and the elastic modulus is 216 GPa (31.3 Msi).
Thermal6
2.4889 HRAnn is rated for continuous service to 1,250°C (2,282 °F). It conducts heat at 14 W/m·K (8.09 BTU/hr·ft·°F), better than 77% of nickel alloy grades. Thermal expansion is 13.5 µm/m·K (7.5 µin/in·°F).
Electrical3
2.4889 HRAnn conducts electricity at 1.5 % IACS, better than 51% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is good (68/100), worse than 82% of nickel alloy grades.
Sustainability4
Producing a kilogram of 2.4889 HRAnn takes about 160 MJ of energy and emits 12 kg of CO₂ — less than 53% of nickel alloy grades. Typical recycled content is 30%.
Manufacturability8
2.4889 HRAnn's machinability is poor (25/100, better than 76% of nickel alloy grades); weldability good (65/100); formability very good (80/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 2.4889 HRAnn
Is 2.4889 easy to machine?
Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, low speed (15–25 m/min), heavy positive feed and flood coolant; avoid dwelling.
Can 2.4889 be welded?
Joined mainly by resistance/spot, TIG or plasma with matching Ni-Cr filler; keep heat input low, clean off oxide first, and avoid sulphur-bearing marking pens or lubricants.
Can 2.4889 be formed, bent or molded?
Excellent cold drawability and coilability in the annealed state; heavy cold work raises strength fast, so interstage anneals at 950–1050 °C with rapid cooling are used.
What surface finishes work on 2.4889?
Not anodizable; normal finish is bright-annealed or pre-oxidized surface — pre-oxidation at 950–1100 °C in air gives the protective, electrically insulating chromia layer for tubular heaters.
2.4889 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 |
|---|---|---|
| Cr | 28 – 31 | 29.5 |
| Feresidual/controlled | 0 – 1.5 | 0.7 |
| Siimproves oxide adherence and resistivity | 0.8 – 2 | 1.5 |
| Mn | 0 – 1 | 0.3 |
| C | 0 – 0.08 | 0.04 |
| Cerare-earth addition (Ce/mischmetal) for scale adherence | 0.02 – 0.15 | 0.05 |
| Al | 0 – 0.5 | 0.2 |
| S | 0 – 0.02 | — |
| Nibalance, approx. 67–70 % | balance | — |
2.4889 HRAnn — frequently asked
What is 2.4889 HRAnn used for?
2.4889 HRAnn is typically used for electric furnace heating elements, resistance wire and strip and high-temperature radiant heaters. In short: 1250 °C element alloy; ce-stabilised adherent scale; excellent wire drawability.
What is the yield strength of 2.4889 HRAnn?
2.4889 HRAnn has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 720 MPa (104 ksi) — weaker than 60% of nickel alloy grades. Strength varies by condition: see the 4 listed tempers.
Is 2.4889 HRAnn easy to machine?
Not especially — machinability is rated poor (25/100, better than 76% of nickel alloy grades). Gummy and strongly work-hardening — use rigid setups, sharp positive-rake carbide, low speed (15–25 m/min), heavy positive feed and flood coolant; avoid dwelling.
Can 2.4889 HRAnn be welded?
Yes — weldability is rated good (65/100). Joined mainly by resistance/spot, TIG or plasma with matching Ni-Cr filler; keep heat input low, clean off oxide first, and avoid sulphur-bearing marking pens or lubricants.
What surface finishes work on 2.4889 HRAnn?
Not anodizable; normal finish is bright-annealed or pre-oxidized surface — pre-oxidation at 950–1100 °C in air gives the protective, electrically insulating chromia layer for tubular heaters.
Can 2.4889 HRAnn be formed, bent or molded?
Excellent cold drawability and coilability in the annealed state; heavy cold work raises strength fast, so interstage anneals at 950–1050 °C with rapid cooling are used.
What is the maximum service temperature of 2.4889 HRAnn?
2.4889 HRAnn is rated for continuous use to about 1,250°C (2,282 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between 2.4889 Annealed and 2.4889-H?
Annealed is the default condition — standard stocked condition for winding heating coils and forming elements — maximum ductility, stable resistance. H: cold-drawn wire for stiff straight elements, resistor windings and cut-to-length parts; anneals out at first heat-up. Yield strength is 400 MPa in Annealed versus 950 MPa in H.
Sources
- DIN 17470 — Heizleiterlegierungen (heating conductor alloys) — DIN (1984)
- EN 60584 / IEC 60584 related resistance-alloy material numbers (Werkstoff-Nr. 2.4889) — CEN/IEC (2013)
- Nikrothal 70 (Ni-Cr 70/30) resistance heating alloy datasheet — Kanthal / Sandvik (2021)
- Resistohm 70 / NiCr 70-30 datasheet — Aperam Alloys Imphy (2020)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials (electrical resistance alloys) — ASM International (1990)
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.