Stainless Steel 1.4886-HF (Hot Finished)
Grade
EN 1.4886 · UNS N08330 · also RA330
Large-diameter bar for machined furnace hardware, rolls and shafts where dimensional tolerance is uncritical.
Values for the HF condition
Other 1.4886 tempers and conditions
1.4886 is listed in 4 conditions; see the grade overview at 1.4886.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
HFThis page Hot Finished | Large-diameter bar for machined furnace hardware, rolls and shafts where dimensional tolerance is uncritical. | 250 | 570 | 42 | 160 HB | 1.7 % IACS |
AnnealedDefault solution annealed (~1120–1180 °C, rapid cool) | Standard stocked condition for plate, sheet, bar, pipe and fittings destined for furnace service. | 260 | 585 | 43 | 160 HB | — |
Welded tube/pipe, annealed (ASTM B546/B775) | Radiant tubes and thermowells; post-weld solution anneal restores ductility and carbide-free austenite. | 265 | 585 | 40 | 163 HB | 1.7 % IACS |
Cold drawn | Choose for straight, close-tolerance bar and for fasteners/pins needing higher room-temperature strength; strength is lost above ~600 °C by recrystallization. | 450 | 690 | 30 | 200 HB | 1.7 % IACS |
What is 1.4886-HF?
1.4886-HF is 1.4886 in the HF grade — large-diameter bar for machined furnace hardware, rolls and shafts where dimensional tolerance is uncritical. 1.4886-HF has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 570 MPa (82.7 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 42% and the elastic modulus is 196 GPa (28.4 Msi). 1.4886-HF has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,371°C (2,500 °F). Annealed is the default condition FabDigit quotes; HF is available on request or by drawing note.
Advantages
- High service temperature — 1,150°C (2,102 °F), better than 99% of stainless steel grades
Limitations
- High embodied carbon — 7.5 kg CO₂/kg, worse than 97% of stainless steel grades
- Low electrical conductivity — 1.7 % IACS, worse than 93% of stainless steel grades
- Low strength — 250 MPa (36.3 ksi), worse than 91% of stainless steel grades
- Poor heat conductor — 12.6 W/m·K (7.28 BTU/hr·ft·°F), worse than 88% of stainless steel grades
- Hard to polish — 60/100, worse than 80% of stainless steel grades
1.4886-HF properties
Typical room-temperature values for 1.4886-HF; 22 are specific to this condition. Other listed values are 1.4886 reference data and may not represent this condition. Bars are the position among stainless steel grades.
Physical3
1.4886-HF has a density of 7.94 g/cm³ (0.287 lb/in³), heavier than 78% of stainless steel grades. It melts at 1,371°C (2,500 °F).
Mechanical13
1.4886-HF has a yield strength of 250 MPa (36.3 ksi) and a tensile strength of 570 MPa (82.7 ksi) — weaker than 91% of stainless steel grades. Elongation at break is 42% and the elastic modulus is 196 GPa (28.4 Msi).
Thermal5
1.4886-HF is rated for continuous service to 1,150°C (2,102 °F). It conducts heat at 12.6 W/m·K (7.28 BTU/hr·ft·°F), worse than 88% of stainless steel grades. Thermal expansion is 14.9 µm/m·K (8.28 µin/in·°F).
Electrical3
1.4886-HF conducts electricity at 1.7 % IACS, worse than 93% of stainless steel grades.
Chemical & Environmental3
Corrosion resistance is good (55/100), worse than 71% of stainless steel grades.
Sustainability4
Producing a kilogram of 1.4886-HF takes about 110 MJ of energy and emits 7.5 kg of CO₂ — more than 99% of stainless steel grades. Typical recycled content is 35%.
Manufacturability6
1.4886-HF's machinability is poor (28/100, worse than 79% of stainless steel grades); weldability very good (75/100); formability good (62/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with 1.4886-HF
Is 1.4886 easy to machine?
Gummy and strongly work-hardening — use rigid setups, positive-rake carbide, heavy positive feed (never dwell), 20–35 m/min turning speeds and flood sulphurized coolant.
Can 1.4886 be welded?
Readily GTAW/GMAW/SMAW welded with matching RA330-04 or ERNiCr-3/ENiCrFe-3 filler; keep interpass low, no preheat, avoid high-Si autogenous welds which can hot-crack.
Can 1.4886 be formed, bent or molded?
Good cold formability but higher force than 304 and rapid work hardening; hot work at 1150–1230 °C and finish above 980 °C, then solution anneal 1120–1180 °C with rapid cooling.
What surface finishes work on 1.4886?
Pickle in HNO3-HF or grit blast to remove high-temperature scale; can be ground and polished to a bright finish, no anodizing (n/a) — passivate after machining for wet service.
1.4886 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 |
|---|---|---|
| Niaustenite stabilizer, carburization resistance | 34 – 37 | 35 |
| Cr | 17 – 20 | 19 |
| Sikey for oxidation/carburization resistance | 0.75 – 1.5 | 1.2 |
| C | ≤ 0.08 | 0.05 |
| Mn | ≤ 2 | 1.2 |
| P | ≤ 0.03 | — |
| S | ≤ 0.03 | — |
| Cusome specs | ≤ 1 | — |
| Febalance, ≈43 % | balance | — |
1.4886-HF — frequently asked
What is 1.4886-HF used for?
1.4886-HF is typically used for heat-treat fixtures, radiant tubes, furnace conveyor components and kiln hardware. In short: furnace alloy to 1150 °C; carburization-resistant 330 grade; high-silicon oxidation barrier.
What is the yield strength of 1.4886-HF?
1.4886-HF has a typical yield strength of 250 MPa (36.3 ksi) and a tensile strength of 570 MPa (82.7 ksi) — weaker than 91% of stainless steel grades. Strength varies by condition: see the 4 listed tempers.
Is 1.4886-HF easy to machine?
Not especially — machinability is rated poor (28/100, worse than 79% of stainless steel grades). Gummy and strongly work-hardening — use rigid setups, positive-rake carbide, heavy positive feed (never dwell), 20–35 m/min turning speeds and flood sulphurized coolant.
Can 1.4886-HF be welded?
Yes — weldability is rated very good (75/100). Readily GTAW/GMAW/SMAW welded with matching RA330-04 or ERNiCr-3/ENiCrFe-3 filler; keep interpass low, no preheat, avoid high-Si autogenous welds which can hot-crack.
What surface finishes work on 1.4886-HF?
Pickle in HNO3-HF or grit blast to remove high-temperature scale; can be ground and polished to a bright finish, no anodizing (n/a) — passivate after machining for wet service.
Can 1.4886-HF be formed, bent or molded?
Good cold formability but higher force than 304 and rapid work hardening; hot work at 1150–1230 °C and finish above 980 °C, then solution anneal 1120–1180 °C with rapid cooling.
What is the maximum service temperature of 1.4886-HF?
1.4886-HF 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 1.4886 Annealed and 1.4886-CD?
Annealed is the default condition — standard stocked condition for plate, sheet, bar, pipe and fittings destined for furnace service. CD: choose for straight, close-tolerance bar and for fasteners/pins needing higher room-temperature strength; strength is lost above ~600 °C by recrystallization. Yield strength is 260 MPa in Annealed versus 450 MPa in CD.
Sources
- ASTM B536 — Ni-Fe-Cr-Si Alloy Plate, Sheet and Strip (N08330/N08332) — ASTM International (2019)
- ASTM B511/B512 — N08330 Bar and Billet — ASTM International (2019)
- EN 10095 — Heat resisting steels and nickel alloys — CEN (2018)
- RA330 Alloy Data Sheet — Rolled Alloys (2022)
- ASM Handbook Vol. 1 — Properties and Selection: Irons, Steels and High-Performance Alloys — ASM International (1990)
- GB/T 15007 / GB/T 15008 — SAC (2017)
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.