GH4169 is the Chinese designation for Inconel 718, the most widely used nickel-iron-chromium precipitation hardened superalloy. Niobium and tantalum form the primary gamma-double-prime phase, molybdenum gives solid-solution strengthening and pitting resistance, and the alloy retains strength from cryogenic service up to about 700 degrees Celsius. As master alloy it is supplied as cast bar or ingot for vacuum remelting, and as wrought bar for forged discs and shafts.
Chinese designation: GH4169 母合金 (Inconel 718 母合金)
| Element | Min % | Max % |
|---|---|---|
| Ni | 50 | 55 |
| Cr | 17 | 21 |
| Nb | 4.75 | 5.5 |
| Mo | 2.8 | 3.3 |
| Ti | 0.65 | 1.15 |
| Al | 0.2 | 0.8 |
| Mn | — | 0.35 |
| Si | — | 0.35 |
| Cu | — | 0.3 |
| C | — | 0.08 |
| P | — | 0.015 |
| S | — | 0.015 |
| B | — | 0.006 |
| Fe | balance | — |
Chemical composition per the grade specification. Values are nominal; the mill test report is issued with every order, traceable to the heat number.
| Supply form | Standard / specification |
|---|---|
| Master alloy bar, as-cast, vacuum induction melted | GB/T 14992 / AMS 5662 |
| Master alloy ingot and button | GJB 5512.1 |
| Horizontally vacuum cast bar | Customer specification |
| Remelted casting rod for investment casting | Customer specification |
Master alloy is supplied in the as-cast condition. The melt route, vacuum level and remelting route for the buyer's own foundry are agreed on the order and recorded on the report.
GH4169 Master Alloy (Inconel 718 master alloy, Alloy 718 master alloy, K4169, UNS N07718) is a master alloys grade. GH4169 is the Chinese designation for Inconel 718, the most widely used nickel-iron-chromium precipitation hardened superalloy. Niobium and tantalum form the primary gamma-double-prime phase, molybdenum gives solid-solution strengthening and pitting resistance, and the alloy retains strength from cryogenic service up to about 700 degrees Celsius. As master alloy it is supplied as cast bar or ingot for vacuum remeltin
ROBAN supplies GH4169 Master Alloy as master alloy bar, as-cast, vacuum induction melted, master alloy ingot and button, horizontally vacuum cast bar, remelted casting rod for investment casting, cut to the length you need and packed for remelting.
Yes. Every order ships with a mill test report covering the actual heat analysis of the melt, together with the heat number and the melt route. 3.2 documentation is available where the contract requires it.
Master alloy is made to order rather than held in stock. The usual lead time is 20 to 40 working days depending on the grade, the melt route and the quantity. Send us your specification for a firm date.
Yes. State the diameter, the length and the condition you need. Bar is normally supplied as-cast and cut to your length, and ingot is supplied as button or cube to match your melting equipment.
Drawing, grade, dimensions, quantity and delivery date — we price from those.
Request a Quote →Heat analysis report issued with every order at no extra charge.
Quality documentation →Shearing, sawing and machining to the tolerances on your drawing.
Capabilities →Buyers often substitute within a family once service conditions, corrosion behaviour or fabrication method narrow the choice.
