Physical properties
| Density | 8.83 | g/cm³ |
Informative values: they vary with composition, condition and test method. Use the governing standard or measured mill data for pressure and heat-transfer calculations.
Chemical composition
Nominal: mid-range where both limits are given, the cap where only a maximum is, balance takes the remainder. Exact specified ranges below.
| Element | Name | Content % | |
|---|---|---|---|
| Main elements2 elements | |||
| Ni | Nickel | ≥ 63% | |
| Cu | Copper | 28 – 34% | |
| Element | Name | Content % | |
|---|---|---|---|
| Minor & residual5 elements | |||
| Fe | Iron | ≤ 2.5% | |
| Mn | Manganese | ≤ 2% | |
| C | Carbon | ≤ 0.3% | |
| Si | Silicon | ≤ 0.5% | |
| S | Sulphur | ≤ 0.024% | |
Mechanical minima by form
Guaranteed values differ by form, size and delivery condition; quotations confirm the specification, form, size and condition.
| Form | Condition | Rm MPa | Rp0.2 MPa | A ≥ % | Other requirements and notes |
|---|---|---|---|---|---|
| Bar and forgings | |||||
| Rod and bar | Cold-worked (as worked), rounds <12.7 mm | ≥ 760 (110 ksi) | ≥ 585 (85 ksi) | ≥ 8 | Not applicable below 2.4 mm diameter or section. Elongation ≥10% for sections under 12.7 mm. Elongation ≥20% for hot-worked flats 7.9 mm and under. |
| Rod and shapes | Cold-worked (as worked), squares, hexagons and rectangles <12.7 mm | ≥ 585 (85 ksi) | ≥ 380 (55 ksi) | ≥ 10 | As above |
| Rod and bar | Cold-worked (stress-relieved), rounds <12.7 mm | ≥ 580 (84 ksi) | ≥ 345 (50 ksi) | ≥ 10 | As above |
| Rod and bar | Cold-worked (stress-relieved), rounds 12.7–88.9 mm | ≥ 600 (87 ksi) | ≥ 415 (60 ksi) | ≥ 20 | As above |
| Rod and bar | Cold-worked (stress-relieved), rounds >88.9–101.6 mm | ≥ 580 (84 ksi) | ≥ 380 (55 ksi) | ≥ 20 | As above |
| Rod and shapes | Cold-worked (stress-relieved), squares, hexagons and rectangles ≤50.8 mm | ≥ 580 (84 ksi) | ≥ 345 (50 ksi) | ≥ 20 | As above |
| Rod and shapes | Cold-worked (stress-relieved), squares, hexagons and rectangles >50.8–79.4 mm | ≥ 552 (80 ksi) | ≥ 345 (50 ksi) | ≥ 20 | As above |
| Rod and shapes | Hot-worked (as worked or stress-relieved), rounds, squares and rectangles ≤305 mm, hexagons ≤54 mm | ≥ 552 (80 ksi) | ≥ 276 (40 ksi) | ≥ 30 | As above |
| Rod and shapes | Hot-worked (as worked or stress-relieved), rounds, squares and rectangles >305–356 mm | ≥ 517 (75 ksi) | ≥ 276 (40 ksi) | ≥ 30 | As above |
| Hexagon bar | Hot-worked (as worked or stress-relieved), >54–102 mm | ≥ 517 (75 ksi) | ≥ 207 (30 ksi) | ≥ 25 | As above |
| Rod and bar | Annealed (hot-worked annealed or cold-worked annealed), all sizes | ≥ 480 (70 ksi) | ≥ 170 (25 ksi) | ≥ 35 | As above |
| Rings and disks | Hot-worked (as worked or stress-relieved) | — | — | — | Also specified: Hardness B75 HRB – B95 HRB No tensile requirement; hardness only. |
| Rings and disks | Annealed | — | — | — | Also specified: Hardness B60 HRB – B75 HRB As above |
| Forging quality bar | Forging quality, all sizes | — | — | — | Forging quality: chemistry and surface only, no tensile requirement. |
| Plate, sheet and strip | |||||
| Hot-rolled plate and sheet | Annealed | ≥ 485 (70 ksi) | ≥ 195 (28 ksi) | ≥ 35 | |
| Hot-rolled plate | As-rolled | ≥ 515 (75 ksi) | ≥ 275 (40 ksi) | ≥ 25 | |
| Cold-rolled sheet and strip | Annealed | ≥ 485 (70 ksi) | ≥ 195 (28 ksi) | ≥ 35 | |
| Cold-rolled sheet and strip | Hard, as cold-worked (hard) | ≥ 690 (100 ksi) | ≥ 620 (90 ksi) | ≥ 2 | |
| Tube and pipe | |||||
| Seamless pipe and tube | Annealed, OD ≤127 mm | ≥ 480 (70 ksi) | ≥ 195 (28 ksi) | ≥ 35 | |
| Seamless pipe and tube | Stress-relieved, all sizes | ≥ 585 (85 ksi) | ≥ 380 (55 ksi) | ≥ 15 | |
| Fittings and flanges | |||||
| Fittings (factory-made wrought butt-weld / socket) | 1650-1700 °F [900-928 °C], rapid air or water quench | — | — | — | Recommended temperature; tolerance ±15 °C (±25 °F). Tensile properties follow the starting material. No tension test on the finished fitting unless agreed. Hot-formed annealed fittings: yield ≥172 MPa (25 ksi). |
| Wire and filler metals | |||||
| Cold-worked wire in coil | Annealed, all sizes | 483 – 586 | — | — | Wrap test around a mandrel equal to the wire diameter. Not applicable to straightened and cut wire. |
| Cold-worked wire in coil | No. 0 temper, dia. <12.7 mm | 552 – 655 | — | — | As above |
| Cold-worked wire in coil | No. 1 temper, dia. <12.7 mm | 621 – 758 | — | — | As above |
| Cold-worked wire in coil | Regular temper, dia. <12.7 mm | 758 – 965 | — | — | Wrap test: mandrel equal to the wire diameter up to 5.84 mm, twice the diameter above. Not applicable to straightened and cut wire. |
| Cold-worked wire in coil | Regular temper, dia. ≥12.7 mm | 621 – 896 | — | — | As above |
| Cold-worked wire in coil | Spring temper, dia. ≤0.71 mm | ≥ 1138 (165 ksi) | — | — | As above |
| Cold-worked wire in coil | Spring temper, dia. >0.71–1.45 mm | ≥ 1103 (160 ksi) | — | — | As above |
| Cold-worked wire in coil | Spring temper, dia. >1.45–2.90 mm | ≥ 1034 (150 ksi) | — | — | As above |
| Cold-worked wire in coil | Spring temper, dia. >2.90–7.92 mm | ≥ 965 (140 ksi) | — | — | As above |
| Cold-worked wire in coil | Spring temper, dia. >7.92–9.53 mm | ≥ 931 (135 ksi) | — | — | As above |
| Cold-worked wire in coil | Spring temper, dia. >9.53–12.7 mm | ≥ 896 (130 ksi) | — | — | As above |
| Cold-worked wire in coil | Spring temper, dia. >12.7–14.3 mm | ≥ 827 (120 ksi) | — | — | As above |
Where this grade is recommended
Matched in 8 service conditions; ranks and scores computed from the condition-scoring matrix.
| Service condition | Industry | Temperature | Rank | Score |
|---|---|---|---|---|
| Hydrofluoric acid | Chemical Processing | ≤ 50 °C | 1 / 6 | 95 |
| Acidizing & fracturing (HCl/HF) | Oil & Gas | ≤ 120 °C | 4 / 6 | 90 |
| Generator H₂ cooling & seals | Power & Nuclear | ≤ 60 °C | 1 / 4 | 88 |
| Shafts, fasteners & propulsion | Marine & Offshore | ≤ 40 °C | 3 / 7 | 88 |
| High-pressure hydrogen | Hydrogen & New Energy | ≤ 80 °C | 2 / 4 | 86 |
| Logging cable & tool housing | Oil & Gas | ≤ 150 °C | 5 / 6 | 80 |
| Sulphuric acid | Chemical Processing | ≤ 80 °C | 8 / 8 | 78 |
| Valves, fittings & flanges | Oil & Gas | ≤ 150 °C | 14 / 14 | 76 |
Designations & equivalents
| W.Nr. (Germany) | 2.4360 / 2.4361 |
| EN designation | NiCu30Fe |
| Trade name(s) | Monel 400 / Nicorros |
| ASTM / AISI | B127 / B163 / B164 / B165 / B366 / B564 / B725 / B730 / B751 / B775 / B829 |
| AMS (SAE aerospace) | 4544 / 4574 / 4675 / 4730 / 4731 / 7233 |
| BS (UK) | NA13 (BS 3072/3073/3074/3075/3076) |
| NACE sour service | ISO 15156-3: any equipment, ≤35 HRC |
| GOST (Russia) | ≈ НМЖМц28-2,5-1,5 |
Cross-references are common near-equivalents for search and shortlisting; substitution across standards requires clause-by-clause verification. All grades in one cross-reference table →
Applicable standards
13 specifications. Name the standard and its edition on the order.
Guaranteed values and required tests differ between specifications — see Mechanical minima by form for the figures per form.
Frequently asked questions
What is Alloy 400 · UNS N04400?
Alloy 400 · UNS N04400 — Ni corrosion-resistant. Classic Ni-Cu alloy — benchmark for HF, seawater and hydrochloric acid
What is the maximum service temperature of N04400?
Typically about 480 °C; the practical limit depends on media, stress and design life — acceptance per the governing standard.
What is the tensile strength of N04400?
The specified minimum tensile strength is 485 MPa for the main product form. Minima for other forms and sizes are listed under "Mechanical minima by form" on this page.
Which standards cover N04400?
ASTM B127, ASTM B163, ASTM B164, ASTM B165, ASTM B366 (fittings), ASTM B564 (forgings), ASTM B725, ASTM B730, ASTM B751/B775/B829, AMS 4544, AMS 4574, AMS 4675, AMS 4730/4731
Where is N04400 typically used?
Hydrofluoric acid (Chemical Processing); Acidizing & fracturing (HCl/HF) (Oil & Gas); Generator H₂ cooling & seals (Power & Nuclear); Shafts, fasteners & propulsion (Marine & Offshore)
In which forms is N04400 available?
Tube, plate, strip, bar, forgings, wire and other forms — sizes and delivery condition confirmed per order, with EN 10204 3.1 / 3.2 certification.
Same series
Download PDF datasheet
This grade’s datasheet as an A4 PDF — for filing, printing or forwarding to colleagues.
Download PDF datasheetSupply & enquiry
Tube & pipeφ1 – 219 × 0.25 – 25 mm
Plate4.76 – 80 mm
Barφ8 – 300 mm
Wire & filler metalsφ0.01 – 8 mmFor this grade we can supply, against your service conditions:
- Tube, plate, strip, bar, forgings, wire and more — with size range and lead time
- Chemistry and mechanical test report (EN 10204 3.1 / 3.2)
- Like-for-like alternatives and selection advice
- Applicable standards and inspection scope
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