Nickel Alloy Alloy 45TM
UNS N06045 · also Nicrofer 45TM
Alloy 45TM (N06045, Nicrofer 45TM) is a Ni-Fe-Cr heat-resisting alloy with an unusually high (~45%) chromium level and about 3% silicon, giving better resistance to metal dusting, carburization and coking than conventional Ni-Cr grades.
Reference datasheet — Alloy 45TM 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 SA condition
Alloy 45TM tempers and conditions
Alloy 45TM is supplied in 5 conditions, soft to hard. SA is the default FabDigit quotes; the values on this page are for it.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot Rolled / Hot Finished + Annealed + Pickled | Heavy plate and forged/hot-rolled bar for furnace retorts and vessel shells; slightly coarser grain and marginally lower strength than cold-rolled sheet. | 315 | 710 | 45 | 172 HB | 1.4 % IACS |
SADefault Solution Annealed | Standard supply condition for plate, sheet, tube and bar — maximum ductility and best carburization/metal-dusting resistance. | 330 | 730 | 42 | 180 HB | 1.4 % IACS |
Cold Rolled + Annealed | Thin sheet/strip with bright annealed or 2D finish for fabricated liners, bellows and formed furnace components. | 345 | 750 | 40 | 185 HB | 1.4 % IACS |
As-welded deposit | Typical all-weld-metal properties for GTAW/GMAW joints made with matching 45TM filler; used for design of welded furnace assemblies. | 400 | 700 | 30 | 195 HB | 1.4 % IACS |
Cold drawn | Higher strength and better surface/tolerances for small-diameter tube and bar where residual cold work is acceptable below ~500 °C service. | 600 | 860 | 22 | 23 HRC | 1.4 % IACS |
What is Alloy 45TM?
Alloy 45TM (N06045, Nicrofer 45TM) is a Ni-Fe-Cr heat-resisting alloy with an unusually high (~45%) chromium level and about 3% silicon, giving better resistance to metal dusting, carburization and coking than conventional Ni-Cr grades. Solution-annealed stock runs 330 MPa yield, 730 MPa tensile, 42% elongation and 180 HB, with service to 1100 °C. Machinability is poor (score 25) because the silicon is abrasive and the alloy work-hardens, and that same silicon makes welds hot-crack sensitive under restraint; Alloy 601 is the cheaper option where carburization does not control. Alloy 45TM has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 99% of nickel alloy grades. It melts at 1,360°C (2,480 °F). Alloy 45TM has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 730 MPa (106 ksi) — weaker than 67% of nickel alloy grades. Elongation at break is 42% and the elastic modulus is 195 GPa (28.3 Msi).
What is Alloy 45TM used for?
- ethylene cracker tubes/fittings
- steam-methane reformer components
- carburizing furnace parts
- petrochemical process tubing
Advantages
- High service temperature — 1,100°C (2,012 °F), better than 88% of nickel alloy grades
Alloy 45TM properties
Typical room-temperature values for Alloy 45TM-SA; bars are the position among nickel alloy grades.
Physical3
Alloy 45TM has a density of 7.6 g/cm³ (0.275 lb/in³), lighter than 99% of nickel alloy grades. It melts at 1,360°C (2,480 °F).
Mechanical15
Alloy 45TM has a yield strength of 330 MPa (47.9 ksi) and a tensile strength of 730 MPa (106 ksi) — weaker than 67% of nickel alloy grades. Elongation at break is 42% and the elastic modulus is 195 GPa (28.3 Msi).
Thermal5
Alloy 45TM is rated for continuous service to 1,100°C (2,012 °F). It conducts heat at 11.5 W/m·K (6.64 BTU/hr·ft·°F), better than 57% of nickel alloy grades. Thermal expansion is 13.9 µm/m·K (7.72 µin/in·°F).
Electrical3
Alloy 45TM conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is excellent (86/100), better than 77% of nickel alloy grades.
Sustainability4
Producing a kilogram of Alloy 45TM takes about 150 MJ of energy and emits 11.5 kg of CO₂ — less than 68% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability6
Alloy 45TM's machinability is poor (25/100, better than 76% of nickel alloy grades); weldability good (60/100); formability good (58/100).
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 nickel alloy family
Yield strength against density for every nickel alloy grade FabDigit runs. Alloy 45TM is highlighted; hover a dot for its name, or open the interactive family chart.
Working with Alloy 45TM
Is Alloy 45TM easy to machine?
Machine like Alloy 600/601 — rigid setups, sharp positive-rake carbide, low speed/heavy feed and flood coolant; the alloy work-hardens quickly and the ~3 % Si makes it abrasive.
Can Alloy 45TM be welded?
GTAW/GMAW/SMAW with matching 45TM (SG-NiCr 27) filler, low heat input, interpass ≤150 °C and no preheat; the high Si content makes it sensitive to hot cracking with excessive restraint or dilution.
Can Alloy 45TM be formed, bent or molded?
Cold form with roughly 1.5–2× the force of austenitic stainless, generous radii and intermediate anneals; hot work at 1150–900 °C followed by rapid cooling from ~1150 °C.
Alloy 45TM 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 |
|---|---|---|
| Niprincipal element | 44 – 48 | 45 |
| Cr | 26 – 29 | 27 |
| Sikey for metal-dusting/carburization resistance | 2.5 – 3 | 2.75 |
| C | 0.05 – 0.12 | 0.08 |
| Mn | ≤ 1 | 0.3 |
| Cerare earth, oxide-scale adherence | 0.03 – 0.09 | 0.06 |
| Al | ≤ 0.3 | 0.1 |
| Ti | ≤ 0.3 | |
| Cu | ≤ 0.3 | |
| P | ≤ 0.02 | |
| S | ≤ 0.01 | |
| Febalance, approx. 21–25 % | balance |
What surface finishes work on Alloy 45TM?
Pickle or grind off the tenacious Cr/Si oxide scale before service; no anodizing — mechanical polishing or bright annealing gives the best oxidation-resistant surface.
Surface treatments FabDigit runs on nickel alloy 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).
Plating
Thermal Spray
Equivalent designations
Standards and trade names that resolve to Nickel Alloy Alloy 45TM in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N06045
- Trade names
- Nicrofer 45TM
How much does Alloy 45TM cost?
Alloy 45TM is a high-cost nickel alloy ($$$$), pricier than about 78% 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.
Alloy 45TM — frequently asked
What is Alloy 45TM used for?
Alloy 45TM is typically used for ethylene cracker tubes/fittings, steam-methane reformer components, carburizing furnace parts and petrochemical process tubing. In short: metal-dusting resistant grade; ~45% Cr heat-resisting alloy; carburization-resistant reformer alloy.
What is the yield strength of Alloy 45TM?
Alloy 45TM has a typical yield strength of 330 MPa (47.9 ksi) and a tensile strength of 730 MPa (106 ksi) — weaker than 67% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Alloy 45TM easy to machine?
Not especially — machinability is rated poor (25/100, better than 76% of nickel alloy grades). Machine like Alloy 600/601 — rigid setups, sharp positive-rake carbide, low speed/heavy feed and flood coolant; the alloy work-hardens quickly and the ~3 % Si makes it abrasive.
Can Alloy 45TM be welded?
Yes — weldability is rated good (60/100). GTAW/GMAW/SMAW with matching 45TM (SG-NiCr 27) filler, low heat input, interpass ≤150 °C and no preheat; the high Si content makes it sensitive to hot cracking with excessive restraint or dilution.
What surface finishes work on Alloy 45TM?
Pickle or grind off the tenacious Cr/Si oxide scale before service; no anodizing — mechanical polishing or bright annealing gives the best oxidation-resistant surface.
Can Alloy 45TM be formed, bent or molded?
Cold form with roughly 1.5–2× the force of austenitic stainless, generous radii and intermediate anneals; hot work at 1150–900 °C followed by rapid cooling from ~1150 °C.
What is the maximum service temperature of Alloy 45TM?
Alloy 45TM is rated for continuous use to about 1,100°C (2,012 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Alloy 45TM-SA and Alloy 45TM-CD?
SA is the default condition — standard supply condition for plate, sheet, tube and bar — maximum ductility and best carburization/metal-dusting resistance. CD: higher strength and better surface/tolerances for small-diameter tube and bar where residual cold work is acceptable below ~500 °C service. Yield strength is 330 MPa in SA versus 600 MPa in CD.
How much does Alloy 45TM cost?
Alloy 45TM is a high-cost nickel alloy ($$$$), pricier than about 78% 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
- VDM Metals Material Data Sheet No. 4051 — Nicrofer 45 TM / Alloy 45 TM — VDM Metals (2018)
- ASTM B409 / B408 / B622 (UNS N06045 plate, sheet, strip, bar, tube) — ASTM International (2020)
- EN 10095 / VdTÜV WB 508 — heat resisting steels and nickel alloys, material 2.4889 — CEN / VdTÜV (2018)
- ASM Handbook Vol. 13B — Corrosion: Materials (high-temperature carburization and metal dusting) — ASM International (2005)
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.