Nickel Alloy CY-40
UNS N06040, J06040 · ASTM A494 CY40
CY-40 (A494, N06040/J06040) is a cast Ni-Cr-Fe alloy with chemistry close to Inconel 600 (N06600), supplied as sand, investment or centrifugal castings for high-temperature and corrosive valve and pump work.
Reference datasheet — CY-40 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 AS-CAST condition
CY-40 tempers and conditions
CY-40 is supplied in 3 conditions, soft to hard. AS-CAST is the default FabDigit quotes; the values on this page are for it.
Compare all 3 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Solution annealed | Choose when maximum ductility, chemical homogeneity and best corrosion/weld-repair behaviour are needed. | 225 | 505 | 42 | 135 HB | 1.7 % IACS |
AS-CASTDefault As-Cast (A494 CY-40, as-cast/stress-relieved) | Standard commercial supply condition for valve bodies and pump casings meeting A494 CY-40 minimums. | 245 | 520 | 38 | 145 HB | 1.7 % IACS |
Hot isostatic pressed | Used for pressure-critical or fatigue-loaded castings where internal porosity must be eliminated. | 250 | 545 | 45 | 140 HB | 1.7 % IACS |
What is CY-40?
CY-40 (A494, N06040/J06040) is a cast Ni-Cr-Fe alloy with chemistry close to Inconel 600 (N06600), supplied as sand, investment or centrifugal castings for high-temperature and corrosive valve and pump work. It provides 245 MPa yield, 520 MPa tensile, 38 % elongation and 145 HB, with service to 1000 °C and a corrosion rating of 76. Cast carbon is higher than in wrought 600, making it more hot-crack and hot-tear sensitive, and machinability is poor (score 28). For strongly reducing acid mixtures CW-12MW is the better cast choice. CY-40 has a density of 8.45 g/cm³ (0.305 lb/in³), heavier than 62% of nickel alloy grades. It melts at 1,354°C (2,469 °F). CY-40 has a yield strength of 245 MPa (35.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 88% of nickel alloy grades. Elongation at break is 38% and the elastic modulus is 200 GPa (29 Msi).
What is CY-40 used for?
- High-temperature valve castings
- Nitric acid service pumps
- Furnace fixtures
Advantages
- Conducts heat well — 14.8 W/m·K (8.55 BTU/hr·ft·°F), better than 80% of nickel alloy grades
- High service temperature — 1,000°C (1,832 °F), better than 79% of nickel alloy grades
- High electrical conductivity — 1.7 % IACS, better than 76% of nickel alloy grades
Limitations
- Low strength — 245 MPa (35.5 ksi), worse than 88% of nickel alloy grades
- Hard to polish — 60/100, worse than 84% of nickel alloy grades
- Limited formability — 20/100, worse than 75% of nickel alloy grades
CY-40 properties
Typical room-temperature values for CY-40-AS-CAST; bars are the position among nickel alloy grades.
Physical3
CY-40 has a density of 8.45 g/cm³ (0.305 lb/in³), heavier than 62% of nickel alloy grades. It melts at 1,354°C (2,469 °F).
Mechanical16
CY-40 has a yield strength of 245 MPa (35.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 88% of nickel alloy grades. Elongation at break is 38% and the elastic modulus is 200 GPa (29 Msi).
Thermal6
CY-40 is rated for continuous service to 1,000°C (1,832 °F). It conducts heat at 14.8 W/m·K (8.55 BTU/hr·ft·°F), better than 80% of nickel alloy grades. Thermal expansion is 13.3 µm/m·K (7.39 µin/in·°F).
Electrical3
CY-40 conducts electricity at 1.7 % IACS, better than 76% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (76/100), worse than 59% of nickel alloy grades.
Sustainability4
Producing a kilogram of CY-40 takes about 150 MJ of energy and emits 12 kg of CO₂ — less than 68% of nickel alloy grades. Typical recycled content is 45%.
Manufacturability8
CY-40's machinability is poor (28/100, better than 82% of nickel alloy grades); weldability good (60/100); formability poor (20/100).
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. CY-40 is highlighted; hover a dot for its name, or open the interactive family chart.
Working with CY-40
Is CY-40 easy to machine?
Gummy, strongly work-hardening: use rigid setups, positive-rake carbide or ceramic tooling, 15–35 m/min with heavy feed, flood coolant, and avoid dwelling to prevent glazing.
Can CY-40 be welded?
Weldable with GTAW/SMAW using ERNiCr-3/ENiCrFe-3 fillers; clean to bright metal, keep interpass temperature low and heat input modest — high cast carbon makes it more hot-crack prone than wrought 600.
Can CY-40 be formed, bent or molded?
Supplied only as castings (sand, investment, centrifugal); Si addition aids fluidity but the alloy is hot-tear sensitive, so use generous fillets, controlled riser feeding and slow, uniform cooling.
CY-40 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 | 14 – 17 | 15.5 |
| Fe | ≤ 11 | 8 |
| Chigher than wrought alloy 600 | ≤ 0.4 | 0.25 |
| Mn | ≤ 1.5 | 0.8 |
| Siadded for casting fluidity | ≤ 3 | 1.5 |
| Cu | ≤ 0.5 | 0.1 |
| S | ≤ 0.03 | 0.01 |
| P | ≤ 0.03 | 0.01 |
| Ni72 % min per ASTM A494 | ≥ 72 (balance) |
What surface finishes work on CY-40?
Grit blast and pickle/passivate for a clean oxide-free surface; can be electropolished or mechanically polished (porosity limits mirror finish); not anodizable, electroless Ni or hard chrome used for wear faces.
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 CY-40 in FabDigit's catalog. Equivalence is nominal — check the exact specification when certification matters.
- UNS
- N06040J06040N06600
- ASTM
- A494 CY40
How much does CY-40 cost?
CY-40 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.
CY-40 — frequently asked
What is CY-40 used for?
CY-40 is typically used for high-temperature valve castings, nitric acid service pumps and furnace fixtures. In short: cast Alloy 600; 1000 °C cast nickel; highest-temperature cast grade here.
What is the yield strength of CY-40?
CY-40 has a typical yield strength of 245 MPa (35.5 ksi) and a tensile strength of 520 MPa (75.4 ksi) — weaker than 88% of nickel alloy grades. Strength varies by condition: see the 3 listed tempers.
Is CY-40 easy to machine?
Not especially — machinability is rated poor (28/100, better than 82% of nickel alloy grades). Gummy, strongly work-hardening: use rigid setups, positive-rake carbide or ceramic tooling, 15–35 m/min with heavy feed, flood coolant, and avoid dwelling to prevent glazing.
Can CY-40 be welded?
Yes — weldability is rated good (60/100). Weldable with GTAW/SMAW using ERNiCr-3/ENiCrFe-3 fillers; clean to bright metal, keep interpass temperature low and heat input modest — high cast carbon makes it more hot-crack prone than wrought 600.
What surface finishes work on CY-40?
Grit blast and pickle/passivate for a clean oxide-free surface; can be electropolished or mechanically polished (porosity limits mirror finish); not anodizable, electroless Ni or hard chrome used for wear faces.
Can CY-40 be formed, bent or molded?
Supplied only as castings (sand, investment, centrifugal); Si addition aids fluidity but the alloy is hot-tear sensitive, so use generous fillets, controlled riser feeding and slow, uniform cooling.
What is the maximum service temperature of CY-40?
CY-40 is rated for continuous use to about 1,000°C (1,832 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between CY-40 AS-CAST and CY-40-SA?
AS-CAST is the default condition — standard commercial supply condition for valve bodies and pump casings meeting A494 CY-40 minimums. SA: choose when maximum ductility, chemical homogeneity and best corrosion/weld-repair behaviour are needed. Yield strength is 245 MPa in AS-CAST versus 225 MPa in SA.
How much does CY-40 cost?
CY-40 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
- ASTM A494/A494M — Castings, Nickel and Nickel Alloy — ASTM International (2023)
- INCONEL alloy 600 technical bulletin — Special Metals Corporation (2008)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Specialty Handbook: Nickel, Cobalt, and Their Alloys — ASM International (2000)
- UNS N06040 / J06040 alloy designation listings — SAE/ASTM Unified Numbering System (2019)
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.