Nickel Alloy Monel R-405-CD (Cold drawn)
Supply condition · default condition
UNS N04405 · ASTM B164
Default stock condition: straight, close-tolerance bar with higher strength and good chip breaking for automatic lathes.
Values for the CD condition
Other Monel R-405 tempers and conditions
Monel R-405 is listed in 4 conditions; see the grade overview at Monel R-405.
Compare all 4 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
Annealed | Pick when maximum ductility, formability or lowest residual stress is needed, or for parts that will be cold-headed/upset before machining. | 220 | 520 | 40 | 120 HB | — |
Hot Finished | Pick for larger diameters and forged/hot-rolled sections where cold-drawn sizes are unavailable; intermediate strength with generous ductility. | 290 | 550 | 35 | 140 HB | — |
CDDefaultThis page Cold drawn | Default stock condition: straight, close-tolerance bar with higher strength and good chip breaking for automatic lathes. | 450 | 620 | 22 | 165 HB | — |
Stress relieved | Pick for slender turned parts and valve stems where distortion after machining and residual-stress corrosion cracking must be minimized while keeping high strength. | 520 | 655 | 18 | 180 HB | — |
What is Monel R-405-CD?
Monel R-405-CD is Monel R-405 supplied in the CD condition — default stock condition: straight, close-tolerance bar with higher strength and good chip breaking for automatic lathes. Monel R-405-CD has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 66% of nickel alloy grades. Elongation at break is 22% and the elastic modulus is 179 GPa (26 Msi). Monel R-405-CD has a density of 8.83 g/cm³ (0.319 lb/in³), heavier than 82% of nickel alloy grades. It melts at 1,300°C (2,372 °F).
Advantages
- Easy to machine — 50/100, better than 99% of nickel alloy grades
- Conducts heat well — 21.8 W/m·K (12.6 BTU/hr·ft·°F), better than 90% of nickel alloy grades
- High electrical conductivity — 3.2 % IACS, better than 89% of nickel alloy grades
- Low embodied carbon — 11 kg CO₂/kg, better than 85% of nickel alloy grades
Limitations
- Low stiffness — 179 GPa (26 Msi), worse than 88% of nickel alloy grades
- Difficult to weld — 20/100, worse than 84% of nickel alloy grades
- Hard to polish — 60/100, worse than 84% of nickel alloy grades
- Limited service temperature — 480°C (896 °F), worse than 82% of nickel alloy grades
Monel R-405-CD properties
Typical room-temperature values for Monel R-405-CD; 15 are specific to this condition. Other listed values are Monel R-405 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Monel R-405-CD has a density of 8.83 g/cm³ (0.319 lb/in³), heavier than 82% of nickel alloy grades. It melts at 1,300°C (2,372 °F).
Mechanical13
Monel R-405-CD has a yield strength of 450 MPa (65.3 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 66% of nickel alloy grades. Elongation at break is 22% and the elastic modulus is 179 GPa (26 Msi).
Thermal6
Monel R-405-CD is rated for continuous service to 480°C (896 °F). It conducts heat at 21.8 W/m·K (12.6 BTU/hr·ft·°F), better than 90% of nickel alloy grades. Thermal expansion is 13.9 µm/m·K (7.72 µin/in·°F).
Electrical3
Monel R-405-CD conducts electricity at 3.2 % IACS, better than 89% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (78/100), better than 51% of nickel alloy grades.
Sustainability4
Producing a kilogram of Monel R-405-CD takes about 145 MJ of energy and emits 11 kg of CO₂ — less than 77% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability8
Monel R-405-CD's machinability is fair (50/100, better than 99% of nickel alloy grades); weldability poor (20/100); formability fair (45/100).
Common Calculations5
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Monel R-405-CD
Is Monel R-405 easy to machine?
The best-machining Monel: run rigid setups with positive-rake carbide, heavy feeds and flood coolant; chips break well but the alloy still work-hardens, so never dwell or rub.
Can Monel R-405 be welded?
Not recommended for welded joints — sulfur promotes hot cracking; use Monel 400/K-500 where welding is required, or mechanically join R-405 parts.
Can Monel R-405 be formed, bent or molded?
Cold form only in the annealed condition with generous bend radii; hot working is restricted (1040–1180 °C) because sulfur causes hot shortness.
What surface finishes work on Monel R-405?
Cannot be anodized; typical finishes are passivation, mechanical polish (sulfide stringers limit mirror quality), electroless nickel or silver/chrome plating.
Monel R-405 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 |
|---|---|---|
| NiNi plus Co per ASTM B164 | ≥ 63 | 66 |
| Fe | ≤ 2.5 | 1.5 |
| Mn | ≤ 2 | 1 |
| Sintentional free-machining addition | 0.03 – 0.06 | 0.04 |
| C | ≤ 0.3 | 0.15 |
| Si | ≤ 0.5 | 0.2 |
| Cubalance in most producer listings | ≥ 28 (balance) | — |
Monel R-405-CD — frequently asked
What is Monel R-405-CD used for?
Monel R-405-CD is typically used for screw-machine parts, valve stems, fittings and precision turned components. In short: best-machining Monel grade; screw-machine free-cutting bar; monel 400 corrosion resistance.
What is the yield strength of Monel R-405-CD?
Monel R-405-CD has a typical yield strength of 450 MPa (65.3 ksi) and a tensile strength of 620 MPa (89.9 ksi) — stronger than 66% of nickel alloy grades. Strength varies by condition: see the 4 listed tempers.
Is Monel R-405-CD easy to machine?
Reasonably — machinability is rated fair (50/100, better than 99% of nickel alloy grades). The best-machining Monel: run rigid setups with positive-rake carbide, heavy feeds and flood coolant; chips break well but the alloy still work-hardens, so never dwell or rub.
Can Monel R-405-CD be welded?
Not readily — weldability is rated poor (20/100). Not recommended for welded joints — sulfur promotes hot cracking; use Monel 400/K-500 where welding is required, or mechanically join R-405 parts.
What surface finishes work on Monel R-405-CD?
Cannot be anodized; typical finishes are passivation, mechanical polish (sulfide stringers limit mirror quality), electroless nickel or silver/chrome plating.
Can Monel R-405-CD be formed, bent or molded?
Cold form only in the annealed condition with generous bend radii; hot working is restricted (1040–1180 °C) because sulfur causes hot shortness.
What is the maximum service temperature of Monel R-405-CD?
Monel R-405-CD is rated for continuous use to about 480°C (896 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
What is the difference between Monel R-405-CD and Monel R-405-ANN?
CD is the default condition — default stock condition: straight, close-tolerance bar with higher strength and good chip breaking for automatic lathes. ANN: pick when maximum ductility, formability or lowest residual stress is needed, or for parts that will be cold-headed/upset before machining. Yield strength is 450 MPa in CD versus 220 MPa in ANN.
Sources
- ASTM B164 — Nickel-Copper Alloy Rod, Bar and Wire — ASTM International (2020)
- MONEL alloy R-405 technical bulletin — Special Metals Corporation (2005)
- 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.