Hangbo Alloy Group
Shanghai · Est. 2012
Finished nickel alloy components machined to your drawing from certified bar, plate or forging stock, with full material and dimensional documentation.
Many buyers of nickel alloy do not want raw mill forms - they want a finished component that drops straight into an assembly. Shanghai Hangbo Alloy Group supplies CNC turned and milled nickel alloy parts machined to customer drawings, starting from certified bar, plate or forging stock that we produce ourselves. Keeping material and machining under one quality system removes the most common source of nickel alloy project failure: a well-made part cut from material whose certificate cannot be traced back to a melt.
The service covers one-off prototypes, small batches of 5 to 50 pieces, and repeat production runs. We routinely machine valve bodies and trim, pump shafts and sleeves, flanged and threaded connectors, downhole tool components, instrument fittings, sensor housings, aerospace brackets and bushings, and the wear rings and seat pockets that go into high-pressure valve assemblies. Starting stock is selected to suit the geometry and the duty: bar for rotational parts, plate for flanges and blocks, and closed-die forgings or seamless rolled rings where grain flow and fatigue life matter.
Nickel alloys work-harden rapidly, cut at low permissible surface speeds and generate high cutting forces, so they are roughly three to five times more expensive to machine than plain carbon steel. Our guide to machining nickel alloys and superalloys explains the tooling and parameter choices behind that difference, and we apply the same principles on the shop floor rather than treating a nickel job as a steel job with a slower feed.
Machining capability. CNC turning to 800 mm swing and 2000 mm between centres, vertical and horizontal machining centres with 4-axis and 5-axis capability, and wire cutting and grinding for hardened features. General machining tolerances are held to ISO 2768-m, with tighter tolerances on individual features machined and verified against the drawing. Threads are produced to ISO metric, UN, UNJ, NPT and API line pipe and rotary-shoulder connections as the drawing specifies.
Starting material specifications. Parts are cut from stock certified to the same standards we supply as mill products, so the finished part inherits a recognised material specification rather than an unnamed bar:
Secondary operations. We coordinate solution annealing, ageing and stress relieving to a specified hardness range, surface treatments including passivation, pickling and electropolishing, non-destructive testing, and assembly or kitting. Pressure-containing parts can be supplied with hydrostatic test and certification to the applicable ASME or client specification.
Inconel 718 is the highest-volume machined grade we handle, because it combines high strength with comparatively good machinability in the solution-annealed condition and is the standard choice for aerospace brackets, downhole tools and high-pressure valve trim. It is machined in the annealed state and then aged to the specified hardness, which avoids cutting a material that has already reached 40 HRC. Inconel 625 is preferred for seawater, chemical and sour gas components where corrosion resistance governs; Monel 400 for marine pump shafts, valve stems and hydrofluoric acid service; Incoloy 825 for acid handling; Hastelloy C276 for the most aggressive mixed-acid duties; and Nickel 200 and 201 for caustic and electronics applications.
Component families we produce repeatedly include valve bodies, bonnets, gates, seats and stems, pump shafts, wear rings, impeller hubs and sleeves, flanges and fittings in special configurations, threaded and flanged instrument connectors, downhole tool subs and mandrels, heat exchanger baffle and tubesheet components, and machined blanks cut from plate or ring for further fabrication.
Every machined component ships with a documentation package that a pressure equipment or aerospace end user can file without further enquiry. Material certification is issued to EN 10204 3.1 as standard and to EN 10204 3.2 with independent witness on request, traceable from the finished part serial number back through the bar or forging heat number to the original melt. Dimensional reports are issued against the drawing, listing measured values for every dimension the drawing calls out as critical, and first article inspection reports are available for new part numbers.
Non-destructive testing is arranged to the drawing or specification: dye penetrant inspection to ASTM E165, magnetic particle inspection where the alloy is ferromagnetic, ultrasonic testing to ASTM A388 or SE-388 on forging-derived parts, and radiography on critical welds or castings. Positive material identification is performed on 100 percent of parts for nickel alloys supplied into pressure or sour service, because a Monel part substituted for an Inconel part can fail in weeks.
Our quality system is certified to ISO 9001:2015, and we additionally hold GJB 9001C and GOST R approvals. Third-party inspection is routinely arranged through BV, SGS, TUV, DNV and Lloyd's Register, and we accommodate client-nominated inspectors and customer source inspection. Parts are individually identified, protected against mechanical damage and chloride contamination, and packed for export with desiccant and sealed wrapping where the surface condition is critical.
For precipitation-hardening grades such as Inconel 718 and Inconel X-750 we normally machine in the solution-annealed condition and apply the ageing cycle afterwards. Machining aged material means cutting a workpiece already at 35 to 45 HRC, which increases tool wear and cycle time substantially and raises the risk of surface tensile stress. Final grinding or honing after ageing is used where a tight tolerance or fine finish is required on a critical seat or bore.
Ideally both: a STEP or IGES solid model drives the CAM programming and a 2D drawing defines the tolerances, surface finish requirements, material specification, heat treatment and inspection criteria that a model cannot carry unambiguously. If only a model is available we can quote against it, but the tolerances and inspection regime would be agreed in writing before manufacture starts so that acceptance criteria are not left to interpretation.
For stocked starting grades such as Inconel 625, Inconel 718 and Monel 400, prototype and small batch parts typically ship in four to seven weeks including material certification and inspection, assuming no special heat treatment or third-party witness. Longer lead times apply where the starting stock must be forged or melted to order, where ageing or a full re-solution treatment is required, or where a client-nominated inspector has hold points in the schedule. Send the drawing and quantity and we will quote a firm lead time with the critical path identified.
Send us your grade, diameter, length, quantity, and any special requirements. Our team responds within 10 minutes during business hours.