Nickel Alloy Monel 400 Cold Rolled Hard
Supply condition
UNS N04400 · ASTM B127 · EN 2.4360, NiCu30Fe · GB NCu30 · BS NA13
Spring-temper strip and diaphragms where high yield strength and stiffness in thin section outweigh formability.
Values for the Cold Rolled Hard condition
Other Monel 400 tempers and conditions
Monel 400 is listed in 5 conditions; see the grade overview at Monel 400.
- O
- Hot Finished
- Cold Drawn
- Cold Drawn Stress Relieved
- Cold Rolled Hard
Compare all 5 conditionsHide
| Condition · open for datasheet | Best for | Yield MPa | Tensile MPa | Elong. % | Hardness | Conductivity |
|---|---|---|---|---|---|---|
ODefault Annealed | Standard stocked condition for plate, sheet, tube and welded fabrications where maximum formability and corrosion performance are wanted. | 240 | 550 | 45 | 125 HB | — |
hot-rolled / hot-worked bar and plate, as-worked | Economical condition for large-section bar, forgings and as-rolled plate where mid-range strength is acceptable. | 310 | 585 | 40 | 150 HB | 3.2 % IACS |
cold-worked bar, rod and tube (as-drawn) | Choose for shafting, fasteners and machined parts needing higher yield strength, better surface finish and improved chip control. | 480 | 690 | 25 | 200 HB | — |
cold-worked then 275–345 °C stress relief | Use where cold-drawn strength must be kept but residual stress (distortion on machining, SCC risk) has to be reduced. | 550 | 700 | 22 | 215 HB | 3.2 % IACS |
Cold Rolled HardThis page full-hard cold-rolled sheet/strip | Spring-temper strip and diaphragms where high yield strength and stiffness in thin section outweigh formability. | 690 | 830 | 6 | 25 HRC | 3.2 % IACS |
What is Monel 400 Cold Rolled Hard?
Monel 400 Cold Rolled Hard is Monel 400 supplied in the Cold Rolled Hard condition — spring-temper strip and diaphragms where high yield strength and stiffness in thin section outweigh formability. Monel 400 Cold Rolled Hard has a yield strength of 690 MPa (100 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 81% of nickel alloy grades. Elongation at break is 6% and the elastic modulus is 179 GPa (26 Msi). Monel 400 Cold Rolled Hard has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 81% of nickel alloy grades. It melts at 1,300°C (2,372 °F). O is the default condition FabDigit quotes; Cold Rolled Hard is available on request or by drawing note.
Advantages
- Easy to machine — 35/100, better than 97% 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
- Low embodied carbon — 9.5 kg CO₂/kg, better than 90% of nickel alloy grades
- High electrical conductivity — 3.2 % IACS, better than 89% of nickel alloy grades
- High strength — 690 MPa (100 ksi), better than 81% of nickel alloy grades
Limitations
- Limited service temperature — 300°C (572 °F), worse than 99% of nickel alloy grades
- Limited ductility — 6%, worse than 90% of nickel alloy grades
- Low stiffness — 179 GPa (26 Msi), worse than 88% of nickel alloy grades
Monel 400 Cold Rolled Hard properties
Typical room-temperature values for Monel 400 Cold Rolled Hard; 21 are specific to this condition. Other listed values are Monel 400 reference data and may not represent this condition. Bars are the position among nickel alloy grades.
Physical3
Monel 400 Cold Rolled Hard has a density of 8.8 g/cm³ (0.318 lb/in³), heavier than 81% of nickel alloy grades. It melts at 1,300°C (2,372 °F).
Mechanical14
Monel 400 Cold Rolled Hard has a yield strength of 690 MPa (100 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 81% of nickel alloy grades. Elongation at break is 6% and the elastic modulus is 179 GPa (26 Msi).
Thermal6
Monel 400 Cold Rolled Hard is rated for continuous service to 300°C (572 °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 400 Cold Rolled Hard conducts electricity at 3.2 % IACS, better than 89% of nickel alloy grades.
Chemical & Environmental3
Corrosion resistance is very good (75/100), worse than 63% of nickel alloy grades.
Sustainability4
Producing a kilogram of Monel 400 Cold Rolled Hard takes about 120 MJ of energy and emits 9.5 kg of CO₂ — less than 90% of nickel alloy grades. Typical recycled content is 35%.
Manufacturability7
Monel 400 Cold Rolled Hard's machinability is fair (35/100, better than 97% of nickel alloy grades); weldability good (65/100); formability poor (25/100).
Values are nominal handbook figures for design screening. Confirm any required mill or lot documentation when quoting.
Working with Monel 400 Cold Rolled Hard
Is Monel 400 easy to machine?
Work-hardens rapidly — use rigid setups, positive-rake sharp carbide, heavy positive feed and constant engagement, moderate speed (~25–40 m/min carbide) with flood sulfurized oil; never dwell in the cut.
Can Monel 400 be welded?
Readily welded by GTAW/GMAW/SMAW with Monel Filler Metal 60 (ERNiCu-7) or Electrode 190; keep surfaces free of sulfur, lead and grease, use low heat input and no preheat, and avoid autogenous welds (add Ti-bearing filler to prevent porosity).
Can Monel 400 be formed, bent or molded?
Excellent cold formability in the annealed condition (deep drawing, spinning, bending) but high springback and fast work hardening — plan interstage anneals at 760–870 °C; hot work at 870–1175 °C and finish above 650 °C.
What surface finishes work on Monel 400?
Pickle in nitric-hydrofluoric or bright-dip after annealing to remove the tenacious green-black oxide; takes a fine mechanical polish, accepts electroless nickel or silver plating, and needs no coating for seawater service.
Monel 400 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 + Co, minimum per ASTM B127/B164 | ≥ 63 | 66 |
| Fe | ≤ 2.5 | 1.6 |
| Mn | ≤ 2 | 1 |
| C | ≤ 0.3 | 0.15 |
| Si | ≤ 0.5 | 0.2 |
| S | ≤ 0.02 | 0.01 |
| Cubalance in practice | ≥ 28 (balance) |
Monel 400 Cold Rolled Hard — frequently asked
What is Monel 400 Cold Rolled Hard used for?
Monel 400 Cold Rolled Hard is typically used for seawater valve bodies and trim, marine pump shafts and casings, heat exchanger tubing and tubesheets, hydrofluoric acid process piping, feedwater heater components and chemical processing vessels and liners. In short: seawater-resistant nickel-copper.
What is the yield strength of Monel 400 Cold Rolled Hard?
Monel 400 Cold Rolled Hard has a typical yield strength of 690 MPa (100 ksi) and a tensile strength of 830 MPa (120 ksi) — stronger than 81% of nickel alloy grades. Strength varies by condition: see the 5 listed tempers.
Is Monel 400 Cold Rolled Hard easy to machine?
Not especially — machinability is rated fair (35/100, better than 97% of nickel alloy grades). Work-hardens rapidly — use rigid setups, positive-rake sharp carbide, heavy positive feed and constant engagement, moderate speed (~25–40 m/min carbide) with flood sulfurized oil; never dwell in the cut.
Can Monel 400 Cold Rolled Hard be welded?
Yes — weldability is rated good (65/100). Readily welded by GTAW/GMAW/SMAW with Monel Filler Metal 60 (ERNiCu-7) or Electrode 190; keep surfaces free of sulfur, lead and grease, use low heat input and no preheat, and avoid autogenous welds (add Ti-bearing filler to prevent porosity).
What surface finishes work on Monel 400 Cold Rolled Hard?
Pickle in nitric-hydrofluoric or bright-dip after annealing to remove the tenacious green-black oxide; takes a fine mechanical polish, accepts electroless nickel or silver plating, and needs no coating for seawater service.
Can Monel 400 Cold Rolled Hard be formed, bent or molded?
Excellent cold formability in the annealed condition (deep drawing, spinning, bending) but high springback and fast work hardening — plan interstage anneals at 760–870 °C; hot work at 870–1175 °C and finish above 650 °C.
What is the maximum service temperature of Monel 400 Cold Rolled Hard?
Monel 400 Cold Rolled Hard is rated for continuous use to about 300°C (572 °F). Strength falls off well before that limit — check the elevated-temperature data for load-bearing parts.
Can FabDigit make parts in Monel 400 Cold Rolled Hard?
Yes — Monel 400 Cold Rolled Hard is available for CNC machining and sheet metal with instant online pricing. Upload a STEP file to get a price and a DFM check.
Sources
- ASTM B127 — Nickel-Copper Alloy Plate, Sheet and Strip — ASTM International (2019)
- ASTM B164 — Nickel-Copper Alloy Rod, Bar and Wire — ASTM International (2020)
- MONEL alloy 400 Technical Bulletin — Special Metals Corporation (2005)
- ASM Handbook Vol. 2 — Properties and Selection: Nonferrous Alloys and Special-Purpose Materials — ASM International (1990)
- ASM Handbook Vol. 13B — Corrosion: Materials — ASM International (2005)
- GB/T 15007 / NCu30 — 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.