Specifications
Surface Treatments
Certifications
- ISO 9001 - 2015 Certified
- PED 2014/68/EC
- NACE MR0175/ISO 15156-2
- NORSOK M-650
- DFAR
- MERKBLATT AD 2000 W2/W7/W10
ASTM B164 - Monel 400 / Monel R-405 Rod, Bar & Wire
ASTM B164 (also ASTM B164 Monel 400, ASTM B164 rod, ASTM B164 bar, UNS N04400 B164) is the Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire. It covers UNS N04400 (Monel 400) and UNS N04405 (free-machining Monel R-405). Monel® is a registered trademark of Special Metals Corporation; TorqBolt is not authorized by, affiliated with or endorsed by Special Metals. B164 is the most-cited Monel 400 bar spec because it feeds ASTM F468 bolts and F467 nuts. TorqBolt supplies B164 rod, bar and wire ex-Mumbai with heat-numbered chemistry on the Monel 400 data sheet and EN 10204 type 3.1 or 3.2 MTC.
Scope of ASTM B164
B164 covers round, square, hexagon and rectangular cross-sections produced as hot-worked rod and bar, cold-worked rod and bar, and cold-worked wire. Rings, disks and forging-quality material are also included. The two grades share the same nickel-plus-cobalt and copper bracket; N04405 differs only in raised sulphur for machinability.
| Product Form | Cross-Section | Conditions Permitted | UNS Grades |
|---|---|---|---|
| Rod | Round, hexagon, square | Hot-worked, cold-worked, annealed, stress-relieved | N04400, N04405 |
| Bar | Rectangle, large round | Hot-worked, cold-worked, annealed, stress-relieved | N04400, N04405 |
| Wire | Round, in coil | Cold-worked only | N04400, N04405 |
| Rings, disks, forging quality | As ordered | Hot-worked or annealed | N04400, N04405 |
B164 does not cover precipitation-hardened Monel K-500 (UNS N05500). K-500 rod and bar ship under ASTM B865, written around the aluminium-titanium age-hardening response N04400 and N04405 do not have.
Chemistry per ASTM B164
Both B164 grades sit in the same bracket as B127 plate, B165 pipe and B564 forgings. Cobalt is counted as nickel. N04405 lifts sulphur from 0.024 percent max to 0.025 - 0.060 percent for chip break. Detail: chemical composition.
| Element, % | UNS N04400 (Monel 400) | UNS N04405 (Monel R-405) |
|---|---|---|
| Nickel + Cobalt, min | 63.0 | 63.0 |
| Copper | 28.0 - 34.0 | 28.0 - 34.0 |
| Iron, max | 2.5 | 2.5 |
| Manganese, max | 2.0 | 2.0 |
| Carbon, max | 0.30 | 0.30 |
| Silicon, max | 0.50 | 0.50 |
| Sulphur | 0.024 max | 0.025 - 0.060 (free-machining) |
Mechanical Floors by Condition
B164 Table 1 sets the floor by alloy, condition and cross-section. N04400 hot-worked annealed rod is the most-shipped because it feeds F468 alloy 400 bolt manufacture under the 25 HRC cap.
| Alloy / Condition | Tensile min, ksi (MPa) | Yield (0.2%) min, ksi (MPa) | Elongation min, % |
|---|---|---|---|
| N04400 hot-worked, rounds up to 12 in (305 mm) | 80 (552) | 40 (276) | 30 |
| N04400 hot-worked annealed, all sizes | 70 (480) | 25 (170) | 35 |
| N04400 cold-worked stress-relieved, rounds 1/2 to 3-1/2 in | 87 (600) | 60 (415) | 20 |
| N04400 cold-worked as-worked, rounds under 1/2 in | 110 (760) | 85 (585) | 8 |
| N04405 hot-worked, rounds 3 in (76 mm) and less | 75 (517) | 35 (241) | 30 |
| N04405 hot-worked annealed, all sizes | 70 (480) | 25 (170) | 35 |
| N04405 cold-worked, rounds 1/2 to 3 in | 85 (585) | 50 (345) | 15 |
Rings and disks use Rockwell brackets: B75 - B95 hot-worked, B60 - B75 annealed. Forging-quality bar ships to chemistry only.
Hardness Ceilings - F468 25 HRC, NACE 35 HRC
B164 gives brackets, not absolute ceilings. Downstream specs are stricter. F468 alloy 400 bolts (machined from B164 N04400 rod) cap hardness at 25 HRC for NACE MR0175 / ISO 15156-3 sour service. NACE MR0175 itself permits N04400 up to 35 HRC for non-bolt parts, but the F468 25 HRC cap controls every TorqBolt sour-service alloy 400 bolt heat.
| Spec | Hardness Limit on UNS N04400 | Service Window |
|---|---|---|
| ASTM B164 | B60 - B75 (annealed) / B75 - B95 (hot-worked) | Bracket only - rod and bar mill condition |
| ASTM F468 alloy 400 | 25 HRC max | Bolts and studs from B164 rod for sour service |
| NACE MR0175 / ISO 15156-3 | 35 HRC max | Non-bolt N04400 components in H2S service |
Related Forms and Sister Specs
Forms cut from B164 rod and bar: round bar, threaded rod, wire, bolts, hex bolts, stud bolts, cap screws, nuts, forgings.
Sister ASTM specs (same chemistry, different form): B127 plate, B165 pipe and tube, B163 condenser tube, B564 forgings and flanges, F468 bolts, F467 nuts. Cross-spec: DIN 17743 NiCu30Fe (W.Nr. 2.4360), UNS N04400, specifications matrix. Attributes: chemistry, mechanical properties, heat treatment, corrosion.
Frequently Asked Questions
What does ASTM B164 cover? Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire in UNS N04400 (Monel 400) and UNS N04405 (Monel R-405, free-machining). Plate ships under B127, pipe under B165.
Does B164 cover Monel K-500 (UNS N05500)? No. K-500 is precipitation-hardened with aluminium and titanium and ships under ASTM B865.
Floor for B164 hot-worked annealed rod? 70 ksi (480 MPa) tensile, 25 ksi (170 MPa) yield, 35 percent elongation.
How does B164 rod feed F468 bolts? F468 alloy 400 bolts are machined from B164 N04400 rod. The 25 HRC cap on F468 bolts is met by ordering rod in the annealed bracket (B60 - B75 Rockwell B).
Difference between N04400 and N04405 chemistry? Only sulphur. N04400 caps sulphur at 0.024 percent max; N04405 lifts it to 0.025 - 0.060 percent for chip break. All other elements are identical.
Request a Quote
For ASTM B164 Monel 400 round bar, UNS N04400 rod, Monel R-405 (N04405) free-machining bar or cold-worked wire, send diameter, length, quantity, supply condition and certification class (EN 10204 type 3.1 or 3.2) to info@torqbolt.com or WhatsApp +91-22-66157017. Ex-Mumbai price plus heat-numbered MTC inside one working day. Export through JNPT.
References
- ASTM B164 Standard Specification for Nickel-Copper Alloy Rod, Bar, and Wire (UNS N04400, UNS N04405)
- ASTM B127 Plate, Sheet, and Strip (UNS N04400)
- ASTM B165 Seamless Pipe and Tube (UNS N04400)
- ASTM B564 Nickel Alloy Forgings, Class A (UNS N04400)
- ASTM B865 Precipitation-Hardenable Nickel-Copper-Aluminum Alloy Rod, Bar, and Wire (UNS N05500)
- ASTM F468 / F468M Nonferrous Bolts, Hex Cap Screws, Socket Head Cap Screws, and Studs
- EN 10204 Metallic products - Types of inspection documents
- NACE MR0175 / ISO 15156-3 Materials for H2S-containing environments
Satisfaction Survey
