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
Monel 400 Billet & Ingot — UNS N04400 Forging Stock
Monel 400 billet (UNS N04400) is the forging-stock form of nickel-copper Alloy 400, supplied for downstream production of forged flanges, valve bodies, large hex bolts, gear blanks, and oversized fittings. TorqBolt supplies hot-rolled billet to ASTM B164 / ASME SB-164 in diameters 75-300mm (3-12″) and lengths 1-3 m. Forging-grade ingot also available. EN 10204 3.1 / 3.2 certification supplied.
Billet Size Range
| Diameter | Length | Surface |
|---|---|---|
| 75 mm / 3″ | 1.0 - 3.0 m | Hot-rolled, pickled |
| 100 mm / 4″ | 1.0 - 3.0 m | Hot-rolled, pickled |
| 150 mm / 6″ | 1.0 - 2.5 m | Hot-rolled, machined |
| 200 mm / 8″ | 1.0 - 2.0 m | Hot-rolled, machined |
| 250 mm / 10″ | 0.8 - 1.8 m | Hot-rolled, machined |
| 300 mm / 12″ | 0.8 - 1.5 m | Hot-rolled, machined |
Chemistry — Forging Grade
UNS N04400 chemistry held to ASTM B164: Ni 63 min / Cu 28-34 / Fe 2.5 max. For forging stock, additional limits: S ≤ 0.020 (vs 0.024 standard) for improved hot-workability. Full ranges.
Forging Procedure
Forging temperature window: 870-1180°C (1600-2150°F). Soak time: ~0.5 hr per inch (12mm) of section thickness. Light reductions only below 870°C (alloy work-hardens rapidly). Post-forging solution-anneal at 870-925°C for 1 hr then water quench restores ductility and corrosion resistance.
Downstream Forged Products
- Forged flanges (ASTM B564, ASME B16.5)
- Forged valve bodies (API 6A wellhead)
- Heavy-hex bolts > M48
- Pump-shaft and propeller-shaft blanks
- Marine fitting blanks (elbows, tees)
- Furnace-internal blanks
Applicable Standards
- ASTM B164 - rod and bar (covers billet up to 300mm)
- ASTM B564 - nickel alloy forgings
- ASME SB-164 / SB-564 - boiler code
- EN 10204 3.1 / 3.2 - inspection certification
- API 6A - wellhead forgings (where applicable)
Quality Testing per Heat
- Chemistry per heat — full element analysis to ASTM B164
- Macroetch — porosity, segregation, center loose-ness
- Tensile at room temperature — minimum 3 specimens
- Ultrasonic — ASME SA-388 Level B acceptance (where specified)
- Heat number stamping on every billet
FAQs
What forging-reduction ratio is recommended for Monel 400?
Minimum 4:1 reduction for sound forging structure. Higher ratios (6:1 and above) for parts requiring ASTM A388 ultrasonic acceptance. Reduction ratio = cross-sectional area of billet ÷ cross-sectional area of finished forging.
Is Monel 400 billet hot-isostatic-pressed (HIP)?
Standard production is cast-then-rolled, not HIP. HIP-grade Monel 400 is available on special order for critical applications (subsea wellhead components) where porosity must be zero.
What's the typical lead time for 12-inch diameter billet?
10-16 weeks mill-direct. Smaller sizes (3-6″) typically stocked. Large diameter is mill-order from the few primary producers globally.
Can scrap forging be remelted as Monel 400 billet?
Yes — Monel 400 has a robust remelt cycle. Clean process scrap (free of foreign metals) is routinely remelted in vacuum-induction or air-induction furnaces. The resulting billet meets ASTM B164 if heat chemistry is verified.
Related
- Monel 400 forging
- Monel 400 round bar
- Monel 400 flanges
- ASTM B164 specification
- UNS N04400 specification
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