Nickel Alloy Inconel 603 CR-ANN
Finish state
UNS N06603
CR-ANN = cold Rolled + Annealed sheet / strip
Thin gauge (<5 mm) for burner liners, baskets, muffle and fixture fabrication where forming is required.
Values for the CR-ANN condition
Other Inconel 603 tempers and conditions
Inconel 603 is listed in 5 conditions; see the grade overview at Inconel 603.
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Hot Rolled + Annealed + Pickled plate | Thick plate (≥5 mm) for radiant tubes, muffles and furnace retorts, supplied descaled. | 330 | 690 | 42 | 178 HB | 1.4 % IACS |
ANNDefault Annealed | Standard stocked condition for sheet, plate, bar and tube used in furnace and combustion hardware. | 340 | 700 | 45 | 180 HB | — |
CR-ANNThis page Cold Rolled + Annealed sheet / strip | Thin gauge (<5 mm) for burner liners, baskets, muffle and fixture fabrication where forming is required. | 350 | 710 | 45 | 185 HB | 1.4 % IACS |
As-welded deposit | Property basis for fabricated furnace assemblies welded with matching Ni-Cr-Al or 617/601-type filler and used without PWHT. | 380 | 660 | 30 | 195 HB | 1.4 % IACS |
Cold drawn | Choose for closer dimensional tolerance and higher room-temperature strength in shafts, pins and small tubes. | 600 | 850 | 25 | 22 HRC | 1.4 % IACS |
What is Inconel 603 CR-ANN?
Inconel 603 CR-ANN is Inconel 603 supplied in the CR-ANN condition — thin gauge (<5 mm) for burner liners, baskets, muffle and fixture fabrication where forming is required. Inconel 603 CR-ANN has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 710 MPa (103 ksi) — weaker than 60% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 205 GPa (29.7 Msi). Inconel 603 CR-ANN has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 97% of nickel alloy grades. It melts at 1,340°C (2,444 °F). ANN is the default condition FabDigit quotes; CR-ANN 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
Inconel 603 CR-ANN properties
Typical room-temperature values for Inconel 603 CR-ANN; 20 are specific to this condition. Other listed values are Inconel 603 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Inconel 603 CR-ANN has a density of 7.75 g/cm³ (0.28 lb/in³), lighter than 97% of nickel alloy grades. It melts at 1,340°C (2,444 °F).
Mechanical14
Inconel 603 CR-ANN has a yield strength of 350 MPa (50.8 ksi) and a tensile strength of 710 MPa (103 ksi) — weaker than 60% of nickel alloy grades. Elongation at break is 45% and the elastic modulus is 205 GPa (29.7 Msi).
Thermal6
Inconel 603 CR-ANN is rated for continuous service to 1,150°C (2,102 °F). It conducts heat at 11 W/m·K (6.36 BTU/hr·ft·°F), worse than 60% of nickel alloy grades. Thermal expansion is 13.4 µm/m·K (7.44 µin/in·°F).
Electrical3
Inconel 603 CR-ANN conducts electricity at 1.4 % IACS, worse than 65% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (80/100), better than 61% of nickel alloy grades.
Sustainability4
Producing a kilogram of Inconel 603 CR-ANN takes about 160 MJ of energy and emits 13.5 kg of CO₂ — less than 53% of nickel alloy grades. Typical recycled content is 40%.
Manufacturability7
Inconel 603 CR-ANN's machinability is poor (19/100, worse than 52% of nickel alloy grades); weldability good (55/100); formability good (62/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Inconel 603 CR-ANN
Is Inconel 603 easy to machine?
Machine like a tough Ni-Cr alloy: rigid setup, positive-rake carbide, low surface speed (15–25 m/min) with heavy constant feed and flood coolant to avoid work-hardened glazing.
Can Inconel 603 be welded?
GTAW/GMAW with matching 603-type or Ni-Cr-Co (617/601) filler; clean off aluminum oxide before welding, keep interpass below ~150 °C and heat input low, no preheat or PWHT normally required.
Can Inconel 603 be formed, bent or molded?
Cold forms in the annealed condition but work-hardens rapidly — allow interstage anneals at ~1120–1180 °C with rapid cooling; hot work at 1180–950 °C.
What surface finishes work on Inconel 603?
Not anodizable; pickle or grit-blast plus pickling to remove the tenacious Al/Cr oxide, then passivate or leave bare — the service-formed alumina scale is the intended protective layer.
Inconel 603 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 | 24 – 26 | 25 |
| Fe | 8 – 11 | 9.5 |
| Alforms protective alumina scale | 2.4 – 3 | 2.7 |
| Chigh C for creep strength | 0.2 – 0.4 | 0.3 |
| Yreactive element for scale adhesion | 0.01 – 0.15 | 0.06 |
| Ti | 0.01 – 0.25 | 0.15 |
| Zr | 0.01 – 0.1 | 0.05 |
| Si | ≤ 0.5 | 0.2 |
| Mn | ≤ 0.5 | 0.15 |
| Cu | ≤ 0.5 | 0.05 |
| S | ≤ 0.01 | 0 |
| P | ≤ 0.02 | 0.01 |
| Nibalance, 58 % min | ≥ 58 (balance) | — |
Inconel 603 CR-ANN — frequently asked
What is Inconel 603 CR-ANN used for?
Inconel 603 CR-ANN is typically used for furnace muffles and retorts, heat-treating baskets, radiant tube heaters and high-temperature fixtures. In short: 1150 °C oxidation resistance; alumina-forming Ni-Cr alloy; carburization-resistant furnace grade.
What is the yield strength of Inconel 603 CR-ANN?
Inconel 603 CR-ANN has a typical yield strength of 350 MPa (50.8 ksi) and a tensile strength of 710 MPa (103 ksi) — weaker than 60% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Inconel 603 CR-ANN easy to machine?
Not especially — machinability is rated poor (19/100, worse than 52% of nickel alloy grades). Machine like a tough Ni-Cr alloy: rigid setup, positive-rake carbide, low surface speed (15–25 m/min) with heavy constant feed and flood coolant to avoid work-hardened glazing.
Can Inconel 603 CR-ANN be welded?
Yes — weldability is rated good (55/100). GTAW/GMAW with matching 603-type or Ni-Cr-Co (617/601) filler; clean off aluminum oxide before welding, keep interpass below ~150 °C and heat input low, no preheat or PWHT normally required.
What surface finishes work on Inconel 603 CR-ANN?
Not anodizable; pickle or grit-blast plus pickling to remove the tenacious Al/Cr oxide, then passivate or leave bare — the service-formed alumina scale is the intended protective layer.
Can Inconel 603 CR-ANN be formed, bent or molded?
Cold forms in the annealed condition but work-hardens rapidly — allow interstage anneals at ~1120–1180 °C with rapid cooling; hot work at 1180–950 °C.
What is the maximum service temperature of Inconel 603 CR-ANN?
Inconel 603 CR-ANN 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 Inconel 603-ANN and Inconel 603-CD?
ANN is the default condition — standard stocked condition for sheet, plate, bar and tube used in furnace and combustion hardware. CD: choose for closer dimensional tolerance and higher room-temperature strength in shafts, pins and small tubes. Yield strength is 340 MPa in ANN versus 600 MPa in CD.
Sources
- INCONEL alloy 603XL material datasheet — Special Metals Corporation (2004)
- VDM Alloy 603 XL / Nicrofer 6025 HT class high-temperature alloys — VDM Metals (2018)
- ASTM B168 / B166 — Ni-Cr-Fe alloy plate, sheet, strip, rod and bar (UNS N06603) — ASTM International (2019)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — 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.