Hangbo Alloy Group
Shanghai · Est. 2012
Custom open die and closed die forgings — flanges, rings, discs, shafts, and complex shapes. Forging press up to 3,000T. Superior grain structure and mechanical properties for critical applications.
Hangbo Alloy Group produces nickel alloy forgings using hydraulic presses and ring rolling mills. Our forging process refines the grain structure and eliminates internal porosity, resulting in components with superior mechanical properties, impact toughness, and fatigue resistance compared to cast or machined-from-plate alternatives.
We manufacture forgings for pressure vessel flanges, valve bodies, wellhead components, turbine discs, and structural connections. Each forging is heat-treated (solution annealed and/or aged) to achieve the required mechanical properties, followed by 100% dimensional inspection and non-destructive testing.
| Parameter | Specification |
|---|---|
| Forging Method | Open die / Closed die / Ring rolling / Upset forging |
| Press Capacity | 500T – 3,000T hydraulic press |
| Max Weight (Open Die) | 3,000 kg per piece |
| Max Weight (Closed Die) | 500 kg per piece |
| Ring Rolling | OD up to 2,500 mm; Height up to 600 mm |
| Forged Bar Diameter | Up to 800 mm |
| Forging Types | Flanges, rings, discs, shafts, blocks, blanks, near-net-shape |
| Heat Treatment | Solution annealing / Aging / Quenching / Stress relieving |
| Surface Finish | As-forged / Rough machined / Finish machined |
| NDT | UT / MT / PT / RT per ASTM standards |
| MOQ | 1 piece (open die); 50 pieces (closed die) |
| Lead Time | 20–35 days (open die); 35–60 days (closed die tooling) |
| Grade | Ni | Cr | Mo | Fe | Nb+Ta | Ti | Al | Other |
|---|---|---|---|---|---|---|---|---|
| Inconel 718 | 50-55 | 17-21 | 2.8-3.3 | bal | 4.75-5.5 | 0.65-1.15 | 0.2-0.8 | Co 1.0 max, C ≤0.08 |
| Monel K-500 | 63-70 | — | — | 2.0 max | — | 0.35-0.85 | 2.3-3.15 | Cu 27-33, C ≤0.25 |
| Incoloy 925 | 42-46 | 19.5-22.5 | 2.5-3.5 | 22 min | 0.5 max | 1.9-2.4 | 0.1-0.5 | Cu 1.5-3.0, C ≤0.03 |
| Hastelloy C-276 | bal | 14.5-16.5 | 15-17 | 4-7 | — | — | — | W 3-4.5, C ≤0.01 |
| Nimonic 90 | bal | 18-21 | — | 5 max | — | 1.8-3.0 | 0.8-2.0 | Co 15-21 |
| Inconel X-750 | 70 min | 14-17 | — | 5-9 | 0.7-1.2 | 2.25-2.75 | 0.4-1.0 | Co 1.0 max, C ≤0.08 |
| Alloy 20 | 32-38 | 19-21 | 2-3 | bal | 8xC-1.0 | — | — | Cu 3-4, C ≤0.07 |
Large-capacity press for open die forgings up to 3,000 kg
Seamless ring rolling up to 2,500mm OD with controlled grain flow
Computer-controlled furnaces for solution annealing and aging
5-axis CNC machining centers for finish-machined forgings
Ultrasonic, magnetic particle, penetrant, and radiographic testing
Forging map, heat treat chart, MTR, NDT report, CoC
| Standard | Scope |
|---|---|
| ASTM B564 | Nickel alloy forgings (general specification) |
| ASTM B637 | Precipitation hardening Ni alloy forgings (718, X-750) |
| ASTM B462 | Forged fittings and flanges (Alloy 20, Hastelloy) |
| ASME SB564 | ASME code for pressure vessel forgings |
| NACE MR0175 | Sour service forgings for oil & gas |
| AMS 5662 | Inconel 718 forging, solution treated |
| AMS 5666 | Inconel 625 forging, solution annealed |
| EN 10222-5 | European standard for Ni alloy forgings |
| ASTM A182 | Alloy steel flanges and forgings (clad) |
We produce four main types: open die forgings (flanges, rings, discs, blocks, shafts up to 3,000 kg), closed die forgings (near-net-shape components up to 500 kg), ring rolled forgings (seamless rings up to 2,500 mm OD), and upset forgings. We also supply forged bars and step shafts.
Yes. We work from customer drawings, 3D models (STEP, IGES), or samples. Our engineering team reviews each drawing for forgeability and suggests modifications to optimize the forging process while meeting final dimensional and property requirements. Tooling for closed die forgings is designed in-house.
We provide complete heat treatment services: solution annealing (to dissolve precipitates and homogenize structure), aging/precipitation hardening (to achieve target strength), stress relieving (to reduce residual stresses after machining), and quenching. All heat treatment is performed in computer-controlled furnaces with temperature chart recordings.
Yes. We can supply forgings certified to NACE MR0175/ISO 15156 for sour oil and gas service. This includes controlled hardness (typically HRC 22 maximum) and specific heat treatment requirements. NACE certification documentation is provided with the MTR.
Send us your drawings, grade, quantity, and any special requirements. We respond within 10 minutes during business hours.